Naval Weapons, Equipment, Fittings & Boats.
Arranged in numerical order, complete and comprehensive.

 
CLICK on the highlighted words (or buttons) "Sheet" or "Sample" in the drawings number column to see a small part of that plan.
Each drawing has a scale bar drawn in imperial feet and inches.

QUAD. 0.5-in. MACHINE GUNS on MARK III 'M' MOUNTING 1938.

L/O/01

A and B

 

Sheet A shows three General Arrangements (GAs) plus a view showing splinter shield detail, and sight arrangements. The gun is drawn in three views with a 1:1 scale 0.50-in. ball round. Used as a close range weapon in the early war years aboard warships the size of Corvettes, Sloops and above.
Sheet B shows two views of the mounting and three views of the mountings outline.

My original drawn 26/2/74 (10 drawings). Redrawn, with details of the gun shield fixings, additional data and views. (Ex OU 6302/38 and BR 971/39 refer)

Two large sheets. 15 drawings. Drawn July 1995.
See L/O/35 for the earlier Mark II* mounting.

SINGLE 20 mm OERLIKON GUNS on MARK I, IIA, IIIA, VIIA and VIIIA MOUNTINGS.

L/O/02

A and B

Sheet A

Sheet B

Sheet A shows different mountings and their construction. Used on warships of all sizes from 1941 (†Vol. II) (15 drawings). Drawn September 1978. Updated by a further six small GA drawings (6 drawings). Drawn June 1994.

Sheet B showing the Mark IIA and IIIA mounting construction, US Mark V gun Sight, the Mark II gun (GA) and ammunition types (11 drawings) (OU 6336 refers).

Two large sheets, Drawn October 1996.

303-in. LEWIS MACHINE GUN.

L/O/03

A and B

Sheet A

Sheet B

Sheet A shows three GAs plus details of single and twin mountings, with a 1:1 scale 0.303" ball round.
Used on warships of all sizes.
Sheet B shows isometric view of the gun and detail plus the Mark XIII Pedestal mounting and views of other mountings.

Two large sheets, 12 drawings, *Vol I. Drawn August 1979.

2-PDR QF MARK VIII GUN on SINGLE MARK VIII MOUNTING.

L/O/04

Eleven GA views (with and without splinter shields) with detail views of ammunition, elevation handwheel, part of sighting arrangement, firing handle, firing gear training handwheel, training base elevating pinion locking bolt detail, etc. (BR 258/41 refers).

One large sheet, 22 drawings. (Replaces L/O/04 of 8/76). Drawn December 1996.

4.7-in. MARK IX GUN on MARK XXII MOUNTING.

L/O/05

A and B

Sheet A shows four GAs plus smaller external GAs and detail. Main armament of the war built 'S', 'T', 'U' 'V' and 'W' class Fleet Destroyers (10 drawings) (BR 1245(43) refers). Drawn March 1989.
Sheet B provides isometric part views of the mounting (12 drawings).

Two large sheets, 22 drawings total. Drawn August 1989.

2-PDR MARK VIII GUN on MARK XVI (POWER OPERATED) MOUNTING.

L/O/06

A and B

Sheet A shows 10 GAs including gun. The main armament on many Coastal Forces units from 1943 and fitted to a few Fleet Destroyers serving in the Far East Fleet in 1945.
BR 1245 refers, 10 drawings. Drawn June 1980.

Sheet B detail showing details R/H side, L/H trunnion, interrupter mechanism, training base, manual power unit and detail of universal control box, 10 drawings, *Vol.III. Drawn June 1994.

Two large sheets. Drawn June 1994.

THE 4-in. MARK IV GUN on MARK P. IX MOUNTING.

L/O/07

 

The main armament of early Fleet Destroyers of WWI. Later re-issued to some minesweepers and minor war vessels during WWII (See also L/O/39 on ‘J’ mounting) (6 drawings).
Redrawn from the WWII manual BR 627. Replacing my original of December 1976.

Two large sheets. 40+ drawings. See also L/O/39 on 'J' mounting. Drawn January/February 2006.

THE 9 mm LANCHESTER MACHINE CARBINE MARK 1 OF 1941 and 1* of 1943.

L/O/08

A British-made copy of the German MP 28/II machine carbine used for RN landing parties.
Three GA views sectional elevation and plan. All the component parts are shown.
BR 832 refers.

One large sheet. 76 drawings. Replaces L/Ö/08 of April 1977. Drawn December 1996.

THE TWIN 40 mm BOFORS MARK IV* (HAZEMEYER) MOUNTING 1944.

L/O/09

A and B

Sheet A

Sheet B

Five GAs drawn.

Sheet A shows detail of two 40mm guns (Mark IX) and shells. The first fully stabilised close range radar controlled mounting. Fitted to 'S' class Fleet destroyers in the later half of 1943, as well as Black Swan class sloops etc.

Sheet B shows only details of the 40mm gun (11 drawings).

 

Two large sheets. Drawn September 1978 and August 1986.

THE 2-PDR QF MARK IIC GUN on MARK XV (POWER OPERATED) MOUNTING.

L /O/10

A to D

The first power operated 2-pdr gun mounting, fitted to steam gun boats and some MGBs.
BR 781 refers, *Vol III. Original Drawn February 1978. Now enlarged and updated January 2011.

Now updated to include detail of the gun and gun component parts.

Sheet “A” (Mountings) (10 drawings).

Sheet “B” (The Gun) (6 drawings).

Sheet “C” Construction of the gun and detail. (96+ drawings).

Sheet D List- parts 97 – 209 plus 4 drgs. of gun operation.

Four large sheets. Drawn February 1978. Enlarged and updated January 2004. Drawn January-February 2011 and May 2012.

THE 4-in. BL (BREECH LOADING) MARK IX GUN on CPI MOUNTING 1917.

L/O/11

 

Sheet A shows GAs showing two differing gun shield shapes the usual curved and later square types. First issued to Minesweeping convoy sloops of the Great War and re-issued to Flower Class Corvettes and some trawlers in the Second World War.
BR 197/17 refers.
Redrawn from the original WWI Manual.

Three large sheets. 30+ drawings. Sheet A drawn August 1997. Two sheets added February 2006.

THE VICKERS 0.303-in. GAS OPERATED (GO) No. 5 MARK 1 GUN 1940.

L/O/12

A and C

Sheet A provides three GAs of the gun plus detail and ammunition.

Sheet B shows detail of quadruple and single mountings, sights etc. Issued as a close range weapon to Coastal Forces and submarines etc.16 drawings.

Sheet C shows four additional drawings, Vickers 0.303" on single Mark III mounting. On twin Mark IV mounting, on twin Mark V mounting and single Mark VI mountings. 4 drawings.

Three medium sheets. Drawn June 1994.

THE 12-PDR 12 cwt. GUN on HIGH ANGLE (HA) LOW ANGLE (LA) MARK IX MOUNTING.

L/O/13

 

A and B

A WWI gun re-issued on a new basic mounting to become the main dual purpose armament of Bangor Class Fleet Minesweepers, trawlers, auxiliaries etc.
BR 269/43 refers.

Sheet A shows four GAs of mounting with six GAs of the gun.

Sheet B shows detail of the MK I, II and V guns, plus detail of sights, mounting base, elevating gear and other types of breech mechanisms.

Two large sheets. 25 drawings total. Drawn August 1978 and September 1978.

THE 4.5-in. MARK IV GUN on MARK V MOD. 2 MOUNTING.

L/O/14

A and B

Sheet A: Seven GAs showing internal and external detail. In fact the CP Mark XXII 4.7" mounting, modified to carry the 4.5" Mark IV gun to equip the fleet destroyer SAVAGE and the war built 'Z' and 'C' classes. Provided with power operation and later re-issued to Post War Tribal Class frigates.
7 drawings. Drawn December 1978.

Sheet B provides isometric part views of the mounting.
12 drawings.Drawn August 1999.

Two large sheets. 19 drawings total.

THE TWIN 0.5-in. VICKERS MACHINE GUN on TWIN MARK V (POWER) MOUNTING.

L/O/15

A to C

Sheet A: Four GAs plus detail of the gun. The first power operated weapon to be carried by Coastal Forces.
BR 918/43 refers.10 drawings. *Vol III.

Sheet B shows ten additional drawings, including GA aperture sight, with mods. Surging rollers, safety depression roller, front view, left hand side, universal control valve box and diagrammatic layout of hydraulic system.
10 drawings.

Sheet C shows 12 photographs of the mounting, including the Mark VA version, plus the control column detail. (7 drawings)

Three large sheets. Drawn April 1979, June 1994, January 2011.

ANTI-SUBMARINE WEAPONS

L/O/16

A single sheet showing the D Mark III and Mark VII depth charges, DC stowage racks, and Mk IV and V throwers, DC racks (Flower Class Corvettes) plus GA of the Mark III Hedgehog and projectile. A general description of escort anti-submarine equipment.
BR 1669(4) - 1943 refers.
(Later sheets show the same subjects in greater detail).

One large sheet, 30 drawings total. Drawn March 1979.

THE 3-in. 20 cwt MARK I GUN on MARK IVA MOUNTING

L/O/17

Four GAs plus gun and breech mechanism. A Great War anti-aircraft weapon re-issued to steam gun boats and some fleet destroyers in WWII.
BR 269/43 refers.

One large sheet. 10 drawings. *Vol.III. Drawn April 1979 - updated June 1994.

THE 40 mm ROLLS ROYCE GUN on MARK XVI MOUNTING

L/O/18

Five GAs plus detail. No BR was ever printed but I have copied the preliminary publication.
A manual weapon, designed for RAF fighters in the tank busting roll, not introduced to the service, but fitted to many motor launches and some motor gun boats.

One large sheet. 10 drawings. *Vol.I. Drawn March 1979 - updated June 1994, April 1995. Enlarged and updated December 2003.

THE BOULTON PAUL QUADRUPLE TURRET with 0.303-in. BROWNING GUNS

L/O/19

Four GAs of mounting and two of the gun.
An aircraft type mounting, fitted to a number of RAF air sea rescue launches.

One large sheet. 6 drawings. *Vol.III. Drawn April 1979.

THE QF 6-PDR 7 CWT. MARK IIA GUN on 6-PDR MARK VII MOUNTING with MOULINS AUTO-LOADER

L/O/20

A and B

Five GAs of mounting with a mass of detail including recoil and runout arrangements, control operating mechanism, base, auto loader and rocket flare projector.
This power operated gun mounting was issued to many classes of MGB from 1944 bringing a great improvement in firepower.
BR 868/45 refers.

Two large sheets. 33 drawings. *Vol.III. Drawn August 1979.

THE 0.303-in. VICKERS MACHINE GUN on SINGLE SHIP MOUNTING and the TWIN 0.303-in. HEFAH MACHINE GUN on MARK I MOUNTING

L/O/21

 

Two GAs of the first, and four GAs of the second with three views of the gun, plus the 0.303" ball Mark VIII Z round.
The first is an Army Infantry machine gun used on a few landing craft and the second is a light MG developed during 1940.
In limited production and issued to a number of trawlers and DEMS.

One large sheet. 6 drawings. Drawn May 1979.

THE 3-PDR HOTCHKISS GUN on the MARK I, I*, 50-in. CONVERSION, MARK V, VI and VI* MOUNTINGS of 1942

L/O/22

GA views and detail of these light guns used at the turn of the century. First in production in the 1880s. These obsolete guns were re-issued and fitted to a number of new, lightweight mountings to arm motor launches and drifters, etc.
BR 610/42 refers.

One large sheet, 22 drawings, *Vol. I. Drawn May 1979.

THE QF 3-in. 12-PDR on MARK V and MARK VI PEDESTAL MOUNT

L/O/23

Three GAs of each mounting.
Two low angle gun mountings issues to pre war destroyers before the Great War, and re-issued in 1939 to a number of requisitioned Mine Sweeping (MS) trawlers etc.

One large sheet. 6 drawings. Drawn May 1979.

THE 3-in. 20-cwt MARK I GUN on CENTRAL PIVOT (CP) MARK V (SUBMARINE) MOUNTING - 1943

L/O/24

Three GAs plus detail of gun, breech and elevating gear. Fitted to submarines from 1936, replacing the earlier Mk V mounting.
The units of the 'S' and 'V' classes carried it.
(BR 970/43 refers).

One large sheet. 9 Drawings. Drawn August 1988.

THE 4-in. QF MARK XXIII GUN on 4-in. S2 (SUBMARINE) MOUNTING

L/O/25

A and B

Sheet A shows four GAs plus detail of cradle, recoil and run out gear, gun, breech mechanism and trunnions.
Sheet B shows breech, sights and gun mounting detail.
An improved 4" gun and mounting that was developed for patrol submarines from 1942.
In October 1945 it was decided that development would proceed for 'A' class units and for retrospective fittings. The last gun on British submarines.
BR 1845 refers.

Two large sheets. 6 drawings. Drawn June 1979.

THE QF 4-in. MARK XII, XII* or XXII GUN on 4-in. S1 (SUBMARINE) MOUNTING

L/O/26

A and B

Sheet A shows three GA views plus gun details and breech mechanism.
Sheet B shows three GAs, recoil cylinder and recuperator, training gear, sighting gear etc.
This weapon was introduced to patrol, fleet and minelaying submarines from 1925 and issued to 'T' class and some later 'S' class boats during the war.

BR 968N/49 refers.

Two large sheets. 30 drawings. Drawn July 1980.

THE 4-in. MARK XIX GUN on CP MARK XXIII MOUNTING 1943

L/O/27

A and B

Sheet A shows 10 GAs plus mounting and fitting detail (23 drawings).
Sheet B shows GA drawing MK. XXIII** mounting and details base plate etc., gun trunnion, sights, elevating gear, training gear, housing stop, centre pivot etc. (28 drawings).

This gun was under development during 1940-41 and with improved steel factors was put into war production but issued to the fleet in limited numbers, being mounted aboard 'Military' class A/S trawlers, 'RIVER' and 'CASTLE' class frigates, and fitted as a star shell mounting on the 1943 Battle Class Destroyers, but with large orders for both the RAN and RCN.
(BR 821/43 refers).

Two large sheets, 51 drawings total. Drawn October 1979 and February 1996.

THE 6-PDR 10-cwt MARK I GUN on 6-PDR TWIN MARK I MOUNTING

L/O/28

 

Five GAs show this little known ex-army rapid firing gun designed for harbour defence. A limited number were modified for RN service and fitted to old 'W' class WW I Fleet destroyers to defend East Coast convoys against 'E' boat attacks.
BR 995 refers.

One large sheet. 5 drawings. Drawn September 1979.

THE VICKERS 40 mm 2-PDR GUN on H/A MARK II MOUNTING - 1929

L/O/29

A and B

Four GA views of whole mounting and three of the gun, plus detail of the elevating and training gear.
The development of the WWI Pom Pom.
This H/A mounting was introduced from 1929 and fitted to destroyer classes building or completing. It was gradually replaced by the lighter and more efficient 20mm Oerlikon gun.
BR 172 refers.

Two medium sheets. 11 drawings. *Vol I. Drawn December 1979 and October 1994.

THE TWIN 20 mm OERLIKON on POST WAR MARK 12 (MANUAL) MOUNTING with the TWIN 20 mm MARK IX MOUNTING

L/O/30

 

The lightweight mounting was developed by Lt Cdr Hitchens to reduce top weight from the Mark V power mounting fitted to MGBs. The sheet also details the post war Mark 12 mounting and gun, as fitted to Fast Patrol Boats and Coastal Minesweepers etc.

One large sheet. 15 drawings. *Vol.II. Drawn July 1980.

THE 4.5-in. 8-cwt GUN on MARK I and II MOUNTING with 2-in. ROCKET FLARE LAUNCHER

L/O/31

A to C

Sheet A provides seven GA views plus detail of 2" rocket flare, launcher elevation cylinder, recoil cylinder, firing gear, own speed deflection sight, training motor, safety firing gear etc.

Sheet B shows detail of the gun, operating mechanism, recoil and run out arrangements sights GA of Mark II mounting, with diagrammatic layout of the mounting pressure system.

Sheet C shows three simple GAs and six views of the Mark II mounting.
This weapon system was designed for the Far East War where soft targets predominated and a large calibre low velocity gun could be fitted to Coastal Forces. A trial mounting was fitted to ML 570 before hostilities ended, but only limited production was undertaken post war, when the Mark II manual mounting was fitted to a few fast patrol boats.
BR 1820/49 refers.

Three large sheets. 42 drawings. *Vol.I. Drawn May 1986 and May 1989.

THE TWIN 20 mm OERLIKON on MARK V (POWER) MOUNTING

L/O/32

A and B

Sheet A

Sheet B

Sheet A shows seven GAs plus details of sights and other fittings on the mounting. This mounting was the first potent close range power operated mounting and fitted to warships of MTB size and upward. (18 drawings) (BR 867 refers). Drawn February 1986.

Sheet B shows sighting gear, trunnion, fire interrupter gear and the rear firing levers. Sighting gear for mountings fitted with the Mark XVI Gyro gun sight. Elevating cylinders and front firing levers. GAs of the canvas cover and the armoured blast protection box with fitting details. The Mark II Oerlikon gun is drawn both with and without the magazine fitted (12 drawings). Drawn January 1997.

Two large sheets, 30 drawings total.

THE QUADRUPLE 21-in. QR MARK VIII TORPEDO TUBES and MARK IX TORPEDO

L/O/33

This quad. tube was carried by the emergency built Fleet Destroyers of 1943-44.
Four GAs plus detail, including torpedo to same scale as the mounting.
BR 1707 refers.

One large sheet. 9 drawings. Drawn February 1986.

THE DEPTH CHARGE THROWER MARK IV* and DEPTH CHARGE Type E7 (NORMAL)

L/O/34

Three GAs of Mark IV DC thrower, Mark V thrower, firing mechanism, tray, depth charge and Mark II DC stowage rack.
Standard equipment for escort vessels from late 1942
(13 drawings) (BR 1669(6) refers).

One large sheet, 13 drawings, Drawn August 1986. (see L/O/73 - subject redrawn)

THE QUAD. 0.5-in. VICKERS MACHINE GUN on MARK II* MOUNTING - 1935

L/O/35

Three GA views plus scale 1:1 round.
The standard quad. Machine gun mounting for units built around 1935, but superseded by the improved Mark III (Drawing L/O/01) mounting later.
(BR 971 - (Ex-OU 6302/38) refers).

One large sheet. 3 drawings. Drawn August 1994.

COASTAL FORCES 21-in. and 18-in. TORPEDO TUBES and TORPEDOES

L/O/36

A to C

Sheet A shows GAs of the standard 21-in. and two 18-in. tubes plus torpedoes to the same scale. Sheet B shows the 21-in. single element tube fitted to 'BLOODHOUND' and Norwegian and Swedish 18-in. Tubes.
Sheet C details Tube construction

(†Vol.II) (52 drawings) (BR 2086 refers).

Three large sheets. 52 drawings total. *Vol.I. Drawn November 1986 and March 1988.

THE 0.5-in. HIGH VELOCITY AUTOMATIC GUNS MARK D* on TWO DIFFERING HIGH ANGLE VERTICAL TWIN MOUNTINGS of 1936

L/O/37

 

Three GA views of each mounting.
I believe, that this was a weapon built for export sales (FRANCE ?).
Both GA drawings show differing cast frames.
No BR shown.

One large sheet. 8 drawings. Drawn September 1994.

THE 2-PDR MARK VIII and VIII* GUN

L/O/38

A to D

The 2-pdr close range gun was the RN's answer to the aircraft threat. Designed between the two world wars, this standard gun was utilised in the 8 barrel Mark V and VI mountings, the quad. Mark VII and VII PX and later RP 50, power operated mounting, as well as the single gun, Mark VIII mounting, and the power operated Mark XVI mounting.
This complex weapon consisted of over 400 parts. I have found the relevant manual, and redrawn the gun in considerable detail.
Sheet A shows six external profiles of the Mark VIII* gun plus 4 detail views and 45+ isometric views of component parts.
Sheet B shows an internal side profile and well over 100 isometric drawings of component parts plus the first detail list No's 1-66.
Sheet C shows over 100 component parts plus detail of ammunition used.
Sheet D shows internal working mechanisms and detail views, 24 drawings.

Various BR's refer.

Four large sheets. 265 drawings total. Sheet A drawn July 1996, Sheet B and C October 1995 and sheet D April 1996.

THE 4-in. MARK IV GUN on MARK 'J' MOUNTING - 1920

L/O/39

Based upon the standard WW I destroyer mounting, with a half shield, the Mark 'J' mounting was sold abroad for export.

One large sheet. 5 drawings. Drawn February 2001.

UNITED STATES NAVY 20 mm OERLIKON MANUAL MOUNTINGS 1942-45

L/O/40

 

Three GAs of the Mark 4 (single), Mark 6 (single), Mark 10 Mod. 24 (single) and the twin Mark 24 Mod. 5 mountings.
Fitted to US Coastal Forces and larger units.

One large sheet. 16 drawings. *Vol.I. Drawn November 1986.

GERMAN SEA MINES 1939-45

L/O/41

A single sheet showing 23 different mine types, the British and German designations with technical details of function, explosive content, the arming system, how laid etc.

One large sheet. 29 drawings. Drawn December 1988.

MINELAYING EQUIPMENT in RN COASTAL CRAFT

L/O/42

A and B

Details of mine chutes, portable mine chutes, layout on Fairmile 'D', mine rails, showing GAs of mine 'A' Mark I-IV, Mark XIV on sinker, Mark XIX on sinker and Mark XX on sinker
BR 635 refers.

Two large sheets, 21 drawings, *Vol.I. Drawn January 1989 and December 2001.

THE 2-PDR MARK XI and XII GUNS on MARK IX MOUNTING 1941

L/O/43

 

Six GAs showing this simple mounting which utilised the 2-pdr sub-calibre gun. Issued to HDML's small trawlers and drifters etc.
BR 251/41 refers.

One large sheet, 7 drawings, *Vol.I. Drawn April 1989. Updated 1994.

COASTAL FORCES RADAR and IFF AERIALS

L/O/44

A and B

Sheet A show details of types 286, 242, 253, 291 U, 240 or 241, American SO Type and 268 U, Type 971 lantern with GAs of mast detail of MGB 510 and the Post War Fast Patrol boat GAY ARCHER.
Sheet B details the fitting and construction of Type 286 PU aboard a Fairmile 'D' Type combined motor torpedo boat/motor gun boat

Two medium sheets. 23 drawings. *Vol.I. Drawn May 1989 and September 1989.

QFSA 4.7-in. CALIBRES MARK IX GUN on CP MARK XIII MOUNTING - 1931

L/O/45

A prototype high angle (60E, plus two views of prototype mounting from Vickers' photographs.
This little known weapons system has been redrawn from Vickers GA drawing No. 94592 and Vickers photographs of the mounting in the gunshop. A prototype mounting underwent sea trials aboard the Fleet destroyer HMS BULLDOG in 1931. Not put into service.
No BR issued.

One large sheet. 7 drawings. Drawn July 1994.

GENERAL ARRANGEMENT and DETAIL of LIGHTWEIGHT TWIN 20mm OERLIKON MOUNTING MARK 'T' (LATER - the TWIN MARK IX MOUNTING).

L/O/46

Detail showing arrangement of layout aboard MGBs 134/138, isometric view of 20mm gun, shoulder rest Mark I, details of mounting, rear and side views and GA Drawing.

One large sheet. 22 drawings. *Vol.II. Drawn March 1990 updated June 1994.

UNITED STATES NAVY 3-in. MOUNTING MARK 22.

L/O/47

Five GAs. This American weapon was provided for many Lend Lease ships, such as the 'CAPTAIN' and 'COLONY' class frigates, 'Kil' class coastal escorts, as well as 'GAZELLE' class BAMS (fleet minesweepers).
BR 643/42 refers.

One medium sheet. 6 drawings. Drawn March 1990, updated with more information October 1993.

COASTAL FORCES ANTI-SUBMARINE EQUIPMENT and FITTINGS.

L/O/48

A and B

Two multi-subject sheets.
Sheet A shows single DC gear, double DC chute and an experimental smoke float container for 70 ft MASBs A US type 'Y' gun (RN Mark III), D Mark III DC, Mark VII DC and the Mark XII DC.
Sheet B shows the Holman Projector* with ammunition. Parachute and cable apparatus, apparatus AD Type 'J' the 2-in. rocket flare and the projector pedestal mounting. The AS crane and 4 cwt depth charge crane. Early and later types of chemical smoke apparatus and the Mark VI portable smoke float.

(I have redrawn the Holman Projector Mark II and III as a complete subject (†Vol.I) (60 drawings) (See L/O/63).

Two large sheets. 60 drawings. *Vol.I. Drawn October 1989 and November 1989.

THE TWIN 4-in. MARK XVI GUN on MARK XIX and RP 51 MOUNTINGS

L/O/49

A to E

Sheet A

Sheet B

Sheet D

A very detailed look at the main medium range anti-aircraft mount of the Second World War. Fitted to major units as secondary armament and the main armament of 'Hunt' class escort destroyers, Black Swan class sloops some V and W Destroyers etc.
Five sheet, showing GAs, General views, the gun and breech mechanisms (15 views).
Other external detail views, rocket flare projectors, elevating gear, cradle recoil, run-out arrangements and data (20 drawings) training gear, sighting gear (diagrammatic), elevation receiver, sighting gear GA (12 drawings).
The twin 4-in. HA/UD RP51 Mark XIX mounting 1945 (four views), GA of turning gear, elevating gear, training base, large detail views and general arrangements plus further data (14 views).
Detail of training base, joystick control, hand power clutch, hand lever and interlock. (24 drawings)

BR 257/41 refers.

Five large sheets. 82 drawings total. Drawn 26/4/93, 29/8/93, 23/6/93, 22/4/93 and 23/8/93.
(I now have additional material on the post war mountings sufficient for two further sheets).

THE TWIN 40 mm BOFORS GUNS on TWIN RP 50 MARK V MOUNTING

L/O/50

A to C

This is the post war twin Bofors 'Utility' mounting fitted to all types of major warships from the early 1950s.
Sheet A shows nine GA views of the export Mark 5(H) mounting, outline dimensions for shipbuilders plus details of fittings and equipment.
Sheet B shows three detailed GAs of RN mounting, sighting arrangements, training receiver drive, joystick control details, training base, firing and safety firing gear and elevation receiver driver, elevating gear and other detail (44 drawings) (BR 1919 refers). Drawn March/April 1995.
Sheet C to be drawn: Arrangement of cables and fittings on mounting (9 drawings).

Two large sheets, sheet C not yet completed.

THE THREE BARREL 'SQUID' A/S MOUNTING MARK 4

L/O/51

The post war ahead throwing weapon.
Eight GA views with details of fittings, breech block, training gear etc. plus ammunition and loading arrangements, data etc.

One large sheet. 32 drawings. Drawn October 1993.

THE QUAD 2-PDR MARK VIII GUNS on MARK VII MOUNTING.

L/O/52

A to D

Another weapons system redrawn from original Vickers GA drawings and selected drawings from wartime gunnery manuals. The quad. Pom pom being the main anti-aircraft armament of destroyers, some sloops and larger vessels.
Sheet A shows the proposed GA, early GAs of pre-war mountings and data (7 drawings).
Sheet B shows two views of the Mark VII PX mounting of 1943, the arrangement of cables and fittings, details of Mark VIII* gun and fittings (14 drawings).
Sheet C details a typical mounting of 1943, the trainers sight, the elevating sight, elevating gear, training gear, hydraulic cut off, base and training buffer stop (21 drawings).
Sheet D shows the data for Mks VII and VII*P mountings, joystick control, training gear, the circulating water system, training base, the Cosine Sight, elevating gear, the firing gear, training gear and other items (22 drawings)

BRs 785 and 847 refers.

Four large sheets. 64 drawings total. Drawn October/November 1993 and January 1994.

THE 40 mm BOFORS GUN on MARK III NAVAL MOUNTING.
THE NAVAL VERSION of the ARMY's SINGLE 40 mm BOFORS GUN

L/O/53

A to C

Sheet A is to show right and left side elevations, plan view, front and rear views and three views of the naval gun off the mounting all to the same scale (8 drawings). Not yet completed.
Sheet B shows three external views and a mass of isometric detail. Mounting body, footrest detail, alternative frame and platforms, firing gear detail, gyro gunsight, and training handles (21 drawings).
Sheet C shows Detail and ammunition. Shipbuilders' plans, plan and side elevation of the original wheeled Army Mark I mounting. Arrangement of Breech casing and automatic loader. (Army gun for comparison). Stencil markings on HE ammunition and detail of the gun balancing gear, elevating and traversing gears (14 drawings).

Three large sheets, sheet A not yet completed. Total 43 drawings.
Drawn Sheet B March 1996 and Sheet C February 1997.

UNITED STATES NAVY TWIN 0.50-in. CALIBRE WATER COOLED COLT MACHINE GUNS on PEDESTAL MARK 22 MOUNTING

L/O/54

The US Army's M2 machine gun on M46 twin mounting which became the US Navy's close range AA weapon until the arrival of the 20mm Oerlikon in 1941.
Fitted to most US warships and some RCN light units GA of colt machine gun with views of mounting, whole weapon system and method of filling ammunition boxes
BR 286/42 refers.

One large sheet. 22 drawings. Drawn March 1990, updated June 1994.

THE 6-PDR QF PEDESTAL MOUNTING MARK 'M' of 1890

L/O/55

 

The original 6-pdr weapon fitted in the fighting tops of capital ships from the 1890s.
Drawn in detail.

One large sheet, 14 drawings. Drawn September 1994.

THE 2-in. SEXTUPLE ROCKET FLARE LAUNCHER MARK I of 1943

L/O/56

 

The standard escort vessel RFL from 1943.
Three views show the GA and another three as fitted to an Algerine Class Fleet minesweeper's 4-in. gun shield A 2-in. rocket flare is also included

One large sheet. 10 drawings. Drawn August 1994.

THE TWIN 0.5-in. VICKERS MACHINE GUNS on MARK IV (MANUAL) MOUNTING

L/O/57

A and B

The manual mounting containing two 0.5-in. Vickers High Velocity Machine guns, as carried by Bangor Class Fleet Minesweepers, many armed trawlers, Fairmile, A and B Type Motor Launches, Motor Minesweepers, Paddle Minesweepers etc.
Sheet A shows two views of mountings in situ. Details of gun, ammunition, four GA views of a typical 1940 mounting. Base plate, and equipment views and detail (20 drawings).
Sheet B shows two GAs, guard plate, training gear, pedal firing gear, elevating gear and depression control gear.20 drawings.
BR 294 refers.

Two large sheets. 40 drawings total. *Vol.III. Drawn January 1995.

THE 20-in. SEARCHLIGHT PROJECTOR MARK IV of 1943

L/O/58

Admiralty Patt. 170A. The standard 20-in. searchlight from 1943. As fitted to Algerine Class Fleet Minesweepers etc

One large sheet, 13 drawings. Drawn December 1994.

HA/LA 6-PDR HOTCHKISS QF GUN on MARK VI MOUNTING - 1942

L/O/59

The 6-pdr gun was introduced in 1884.
A number of guns were in store and a new high angle/low angle mounting was rapidly designed to utilise the existing guns. From early 1943 they were fitted to Fairmile 'D' MGBs and a number of Fairmile 'B' Motor Launches converted to gun boats for the war in the Far East. Seven GA views, plus detail
BR 256/42 refers.

One large sheet, 24 drawings, *Vol.III. Drawn March 1995.

STEAM POWERED MINESWEEPING WINCH for ALGERINE and BANGOR CLASS FLEET MINESWEEPERS - 1940 ONWARDS

L/O/60

A to E

Five sheets drawn in detail from original drawings kindly provided by Clarke Chapman Ltd.
All five sheets are almost completed

Five large sheets. Drawn April 2003.

STEAM and HAND WINDLASS for ADMIRALTY MINESWEEPERS. BANGOR and ALGERINE CLASSES 1943 ONWARDS

L/O/61

A and B

Two sheets drawn in detail from original drawings kindly provided by Clarke Chapman Ltd.
Both sheets are started.
Eleven views Sheet A
Three views are started on Sheet B to date.

Not yet completed. April 2003.

ALGERINE CLASS FLEET MINESWEEPER RDF OFFICE and LANTERN for TYPE 271 SURFACE SEARCH RADAR from MAY 1943 (ALSO FITTED TO OTHER WARSHIP CLASSES)

L/O/62

A and B

Sheet A

Sheet B

Sheet A shows detailed drawings of both office and mahogany lantern frame. Detail of the final lantern fitted. Twenty detailed views including doors etc. (24 drawings). Drawn May 1995.
Sheet B provides details of the earlier lantern construction, as fitted to Flower Class Corvettes etc. The two radar aerials and other equipment is now included as a result of a visit to the RN Radar Museum at HMS Collingwood (12 drawings) Drawn September 1999.

One medium and one large sheet. 36 drawings total.

THE HOLMAN PROJECTOR MARKS IIA, IIS of 1941 and MARK III of 1943

L/O/63

This interim emergency weapon, never popular, is detailed, showing both the air and steam powered version. The improved, redesigned Mark III version fired by Cartridge is also included, plus ammunition detail.
(OU 5530 (Official Use) BRS 267/41 and BR 1009/43 refer).

One large sheet. 21 drawings. *Vol.III. Drawn July 1995.

THE 2-PDR POM POM DIRECTOR MARKS II, IIA, III and III* - 1940

L/O/64

The close range gunnery director fitted to major units that carried 4 barrelled or 8 barrelled 2-pdr mountings.
One GA view, four end views, three part views and perspective view of mechanism (9 drawings).
(Ex OU 6365/400, BR 937 and BR 1237/43 refer).

One large sheet. 9 drawings. Drawn August 1995.

THE QFSA 4.7-in. (45 calibres) MARK IX GUN on MARK XVIII MOUNTING 1936-42

L/O/65

A to C

The main armament of 'H' and 'I' Fleet Destroyers, four of the 'O' class and the 'Q' and 'R' emergency classes.
Sheet A show two GA views, five GA drawings plus plan of base (8 drawings) Drawn March 1996.
Sheet B shows details of the Mark IX** gun, loading tray arrangements for mountings 1-37 and 38 and beyond. Base construction, the gun cradle, the intensifier, the firing gear, elevation and depression stops and detail of the depression control gear (30 drawings). Drawn February 1996.
Sheet C shows training and elevating gear, training and elevation receivers, black pointer drives etc. and data (13 drawings)
(OU 6306 and BR 966/38 refers)

Three large sheets. 51 drawings total. Drawn March 1996.

THE EIGHT BARRELLED (2-PDR MARK VIII GUNS) 'M' MARK V MOUNTING of 1938

L/O/66

General Arrangement drawing only. Plan view, right hand elevation, left hand elevation, front and rear elevations plus data. This was the first production eight barrel Pom Pom superseded by the later improved Mark VIA mounting.
(BR 785 refers).

One large sheet. 5 drawings. See also L/O/84. Drawn February 1996.

THE MARK X HEAVY DEPTH CHARGE LAUNCHING RAIL 1944,
and DEPTH CHARGE RAILS for 3, 6, 9 and 12 DEPTH CHARGES of 1942

L/O/67

The Mark 'X' shows launching rails and GA of Mark X** charge.
The standard rails are drawn as in 1941 (13 drawings)
(BR 1669(6) and CB 4257(6/44) refer).

One large sheet, 13 drawings. Drawn April 1995.

THE MARK V DEPTH CHARGE THROWER of 1944

L/O/68

The final WWII development.
GA Views, details of the breech block (including exploded view), fitting of arcticialisation steam heating pipes etc

One medium sheet. 13 drawings. Drawn April 1996.

LAYOUT FOR CAPTAINS CLASS FRIGATES 1944

L/O/69

(As supplied under lend lease). Isometric view of quarterdeck arrangements providing a 10-pattern discharge and upper deck stowage for an outfit of 160 charges (2 drawings). PLUS diagrammatic layout of the electro hydraulic depth charge pattern laying gear Mark II of 1944 for RN units

One large sheet. 3 drawings. Drawn April 1996.

THE SINGLE 40 mm BOFORS MARK VII MOUNTING 1948

L/O/70

A to E

A five-sheet subject showing this post war weapon, which remained in service until the late 60s.
Sheet A shows left hand view of mounting and three GA views. Detail and layout of the Training and Elevating power drive, the power unit, training base and carriage, and the sighting arrangements (13 drawings). Drawn July 1996.
Sheet B shows right hand views of mounting and three GA views. Dimensions of the installation layout, elevating balancing gear, and isometric drawings of: Auxiliary sight, traversing gear box, manual power unit, the seat, change over valve, power unit motor, footrest, gun fire piston, structure and rotation, interrupter mechanism and housing stop, the valve box control handles, elevation gear box and the right front view and left rear view of the mounting (22 drawings). Drawn July 1996.
Sheet C details the manual power unit, relief valve, header tank and filter. A diagrammatic layout of the power unit, pump and the hand turning gear, the elevating balancing gear, firing gear and the elevation cut off gear (16 drawings). Drawn November 1996.
Sheet D details the pipe runs in diagrammatic and layout views. The slip ring unit, base bearing scale, ammunition stowage on the mounting, training base structure, and the cab structure and detail (16 drawings). Drawn November 1996.
Sheet E shows the electrical wiring arrangements, safety firing gear, the sight detail, seat assembly, power unit frame and training base, and the assembly of the cartridge deflector etc. (22 drawings)
(BR 1800, BR1110 and BR 1847 refer).

Five large sheets. 89 drawings total. Drawn November 1996.

THE MARK III DEPTH CHARGE THROWER (US 'Y' GUN) and EQUIPMENT.

L/O/71

 

A US Navy thrower issued in limited numbers to the RN and fitted to a few Fairmile 'B' motor launches in 1941.

One medium sheet. 9 drawings. Drawn May 1996.

THE MARK II DEPTH CHARGE THROWER and ASSOCIATED EQUIPMENT

L/O/72

A and B

This is the anti-submarine equipment that the RN started with at the outbreak of WWII (mostly dating from the previous conflict). I recently acquired original drawings of the period and the material has been redrawn.
Sheet A shows 8 views of the Mk II thrower, firing mechanism detail, thrower deck seat, thrower and davit and detail of the earlier Thornycroft 9.5-in. Bomb thrower. (22 drawings). Drawn June 1996.
Sheet B shows all the relevant detail and fittings (22 drawings).

Two large sheets. Total 44 drawings. Drawn June 1996.

THE MARK IV DEPTH CHARGE THROWER of 1943

L/O/73

(Modified for electro Hydraulic firings).
Showing thrower, arcticalisation, firing key and detail views.
(BR 1669(4) 1943 refers).

One large sheet. 13 drawings. Drawn May 1996.

THE MARK I (MODIFIED) and MARK I* STOWAGE RACK for DEPTH CHARGE THROWER MARK IV of 1944

L/O/74

 

Redrawn from original drawings and showing the breakdown of modifications to the earlier stowage rack of 1943.
BR 1669(4) 1943 refers.

One large sheet. 18 drawings. Drawn May 1996.

The Mark I* Depth Charge Stowage Rack for Throwers Mark IV and V 5 charge rack.

L/O/75

Plus details of the Mark VII light and Mark VII heavy depth charges.
BR 1669 (4) 1944 refers.

One medium sheet. 11 drawings. Drawn May 1996.

MLs, MGBs and MTBs ARRANGEMENT of DEPTH CHARGE TELEFLEX CONTROL GEAR 1943

L/O/76

Detail of the bridge control system for the remote firing of depth charges from the bridge.

One small sheet. 3 drawings. Drawn June 1996.

FOXER EQUIPMENT, LAYOUT of SHIP ARRANGEMENTS in TYPICAL DESTROYER. Ex US CUTTER and CAPTAINS CLASS FRIGATES.

L/O/77

Shows typical upper deck layout of required fittings for streaming this equipment.
(Note that the foxer is not shown, only the fittings and layout)

One medium sheet. 3 drawings. Drawn June 1996.

THE UNITED STATES NAVY MARK 6 DEPTH CHARGE PROJECTOR or 'K' GUN of 1941

L/O/78

Three GA views with isometric drawings of three reloading racks, showing both Mark 6 and Mark 9 charges. The depth pistol and detail of the Mark 9 charge.

One large sheet. 13 drawings. Drawn November 1996.

THE READY USE AMMUNITION LOCKER for 2-PDR POM POM MARK VII MOUNTING of 1940

L/O/79

Two lockers per quad. Gun mounting. Drawn in detail from original specification GA drawings.

One large sheet. 19 drawings. Drawn August 1996.

THE READY USE LOCKER FOR SINGLE 20 mm OERLIKON MOUNTINGS - 1939

L/O/80

The early wartime R-U ammunition locker holding four charged magazines and two boxes of 20 mm rounds for recharging empty magazines.

One large sheet. 21 drawings. Drawn August 1996.

THE 40 mm BOFORS MARK 4, 9, 10 11 and N1 SERIES of GUNS - 1953-88

L/O/81

 

The detailed views, external and internal, of a Mark 4 left hand gun, breech casing and other differences, the action of the loading mechanism, breech mechanism and GA detail of the single air cooled gun. (BR 1057/53 refers).

One large sheet. 32 drawings. Drawn September 1996.

THE 20 mm OERLIKON MARK I and II GUN

L/O/82

This gun, built on both sides of the Atlantic was supplied under Lease Lend.
Fully detailed, all the component parts of this weapon are shown.

One large sheet. 140 drawings. Drawn October 1996.

THE 9 mm SMITH and WESSON SELF LOADING CARBINE MARK 1 of 1941 and MARK 1* of 1943

L/O/83

Supplied in limited numbers under Lease Lend this weapon is shown in a external plan and side elevation and a sectional elevation with two small detail views of the working mechanism.

One medium sheet. 7 drawings. Drawn October 1996.

THE EIGHT BARRELLED (POM POM) MARK VI* RP10 MOUNTING of 1945

L/O/84

A to E

This complex mounting was developed from the earlier Mark V mounting and adopted power operation. A late war mounting is depicted.

Sheet A shows large views of the left hand, right hand, front and rear elevations
(4 drawings).

Sheet B shows a large plan view to the same scale and a mass of isometric views of the mounting. Training receiver drive and part of the safety firing gear. Ammunition tray LH side. Front view showing elevation pinion and worm gear box. Training gear. Elevation receiver. LH sights and elevating handle. Training buffer. Training base and centre pivot. Foot pedal, Firing pedal. Training sights showing the training handles and receiver. The top of the LH cradle. Safety firing and training worm gear box, and Joystick power control and part of the elevating gear
(16 drawings).

Sheet C details 5 smaller GA views of the whole mounting with its armoured box for the 'joystick' operator. The armoured box is detailed separately. An isometric view shows the forward view of the standard mounting. The table of the mounting particulars occupies much of this sheet
(10 drawings).

Sheet D contains three isometric views of the standard Mark VIA mounting, two views of the armoured box and the layout for the method of loading and connecting ammunition belts on the suspension rails. The cooling system, the improved joystick control system and the firing gear on the gun carriage and the safety firing gear
(17 drawings).

Sheet E details the training and elevating gear when fitted with oil servo units. Training and elevating gear when fitted with air servo units and a diagrammatic arrangement of the mounting firing circuit. Isometric views show the shaft to the training worm gear box, firing gear detail and hand crank
(12 drawings).

Five large sheets. Total 59 drawings. Drawn February, June and July 1997.

DEPTH CHARGES and EQUIPMENT 1936-40 OU 5485 of 1st DECEMBER 1936, UPDATED to 1940

L/O/85

A to C

Sheet A shows 'D' Mark II, 'D' Mark III and Mark VII Depth Charges, Mark IV and V primers, Mark VII pistol and Mark VII adjuster as well as a DC. Thrower Mark II.

Sheet B and C will include Newitt's hydraulic release gear, the chute with hand release gear, DC traps etc.

One large sheet, Sheets B and C not yet completed. Sheet A completed March 1997.

THE 4-in. QF MARK V GUN on H/A MARK III, III** and IV MOUNTINGS 1917-1945

L/O/86

A to F

A six sheet subject detailing this high angle weapon in use with the RN. From the 1920s through to the end of WWII. It was the main armament of many minesweeping sloops, fleet destroyers ('O' an 'P' Classes) and Algerine class fleet minesweepers etc. The main GA (Sheet C) is redrawn from the mountings fitted to HMS Hood in the early 20s with detail of the fittings from the 1919 gunnery manual, and the later BR 833 of 1943 which details the improved mountings.

Sheet A shows 9 isometric views of various marks of mounting plus a number of differing splinter shields (17 drawings).

Sheet B details parts of the mounting and fittings 1943-45. The sights, range and deflection gear, elevating gear, elevation black pointer drive, training pinion, elevating handwheel and gear box, the training gear, the training black pointer drive, detail of the pneumatic recuperator (Mark III* and IV mountings). Depression safety firing gear, crank handles, the spring recuperator (Mark III** mounting). Front end of torsion shaft, recoil detail and black pointer drives (32 drawings).

Sheet C details the original Mark III mounting of 1917 (4 views) plus the electrical parts supplied with the mounting (2 views). Four differing Marks of 4-in. gun are detailed showing their construction (14 drawings).

Sheet D shows construction detail of the early mountings. - Breech mechanism, gun cradle, recoil cylinder etc., elevating gear, training gear, firing gear, recocking and loading tray safety gear, the recuperator, and shipbuilders drawings (22 drawings).

Sheet E provides the weapon's data with the history of its development. I will also add smaller GAs of WWII mountings.

Sheet F shows further component parts and views of the Mark III** mounting.

Four large sheets, Sheets E and F not yet completed. Sheets A to D drawn May 1997.

THE TWIN 4.7-in. QF MARK XI GUNS on MARK XX MOUNTING - 1942

L/O/87

A and B

A multi-sheet subject detailing this enclosed mounting, the main armament of four of the L class and all the M class Fleet destroyers.

Sheet A shows five external views plus detail of the sight doors and base (7 drawings). Drawn August 1997. (I have all the drawings for the internal arrangements, which will be added on additional sheets as time permits).

Sheet B shows the for'd part view of HMS Marne in December 1945 and the gun construction and detail including two views of the breech mechanism both open and closed. Full design data and development are included (9 drawings).

Two large sheets. Drawn October 1997. Further sheets will be added as time permits.

THE 4-in. BL (BREECH LOADING) MARK IX GUN on TRIPLE MARK I MOUNTING - 1916

L/O/88

This triple mounting carried a high velocity gun being an anti-torpedo craft defence aboard the Renown and Repulse. Hand worked and requiring a crew of 32 it was not very satisfactory. Three external views, two GAs, the arrangement of the elevating gear, securing gear and three views showing the arrangements for dismounting the guns

One large sheet. 17 drawings. Drawn August 1997.

THE PARAVANE "DEPRESSOR" TYPE L MARK III

L/O/89

 

The "interwar" depressor is shown in four views with a plan and elevation of the towing span used to stream paravanes.

One medium sheet. 17 drawings. Drawn August 1997.

THE MINESWEEPING PARAVANE TYPE "C" MARK VI

L/O/90

The interwar paravane redrawn from a Vickers Armstrong drawing. Five Gas.

One medium sheet. 5 drawings. Drawn August 1997.

The 'Snowflake' Transport Box and Rocket Box - 1942.

L/O/91

The standard ready use rocket box for Algerine Class Fleet Minesweepers and other escort vessels.

One medium sheet. 12 drawings. See L/O/92 for details of the projector and rocket. Drawn August 1997.

RESERVED for the 2-in. PARACHUTE and CABLE "SNOWFLAKE" ROCKET as FITTED to BOTH ESCORT and MERCHANT VESSELS from 1941

L/O/92

 

Not yet drawn.

QUINTUPLE 21-in. PR MARK III TORPEDO TUBES - 1944

L/O/93

A and B

Two detailed sheets showing the tubes carried by the second group (1943) 'Battle Class' Fleet destroyers. (Drawn at ¾-in. per foot).

Sheet A showing Side, front, rear and plan views, plus 21-in. Mark IX torpedo, transporting bogie (8 drawings).

Sheet B shows detail and construction. (11 drawings).

Two large sheets. 19 drawings total. Drawn November 1997.

THE 4.7-in. QFSA 40 CALIBRE GUN on the CP Mark XV (SUBMARINE MOUNTING) - 1930

L/O/94

The armament of HM submarines THAMES, PORPOISE and some of the PARTHIAN and RAINBOW classes until replaced by the lighter 4-in. 'S1' mounting.
Four external views and three detail views

One large sheet. 7 drawings. Drawn September 1997.

QUADRUPLE 21-in. TORPEDO TUBES. QRE MARK I - 1929

L/O/95

 

The first RN quadruple mounting designed for the 1926 cruisers EMERALD and ENTERPRISE, with four mountings per ship.
Three GA views and two views showing detail plus history.

One medium sheet. 5 drawings. Drawn October 1997.

THE UP (UNROTATED PROJECTILE) MARK I MOUNTING - 1941

L/O/96

 

Another stopgap weapon that threw a parachute and cable into the path of enemy aircraft.
Fully detailed GAs and elevations, including construction details. The arrangement of the 'Canister' ammunition is also detailed.

One large sheet. 14 drawings. Drawn December 1997.

2-in. ROCKETS AND ILLUMINANTS

L/O/97

Apparatus A. Type 'D', PAC (parachute and cable).
Apparatus AD. Type 'J', 1lb signal rocket, 1lb practice target Mark II, hand held flares, Very's light cartridges and the line carrying 2lb Schermuly rocket Mark I.
Each item is fully detailed.

One large sheet. 20 drawings. Drawn September 1997.

4-in. QF MARK V GUN on 'P' (PEDESTAL) MARK II* MOUNTING - 1912

L/O/98

 

A pre WWI destroyer weapon for the RN. Subsequently, sold abroad and supplied to the Royal Australian and Royal New Zealand Navies.
Fully detailed. Drawn at 1-in. per foot

One large sheet. 7 drawings. Drawn October 1997.

THE DESTROYER GUNNERY RANGEFINDER DIRECTOR MARK V** - 1943

L/O/99

 

The duel purpose gunnery director fitted to the 'O' and 'P' class fleet destroyers, Hunt class escort destroyers and Bay class anti-aircraft frigates.
Redrawn from original Laurence, Scott and Electromotor Ltd. drawings.
Fully detailed

One large sheet. 8 drawings. See also L/O/101/A-B for further details. Drawn November 1997.

THE 4.7-in. BREECH LOADING MARK I GUN on CP MARK VI MOUNTING - 1917

L/O/100

 

The RN's first 4.7-in. calibre gun, developed from the army gun in order to improve the destructive 'punch' of new destroyers. First introduced aboard ships of the 'Shakespeare' class.
Fully detailed views, both with and without the half gunshield, plus detail of the gun, training gear, elevating gear, base construction and run out arrangements

One large sheet. 18 drawings. Drawn January 1988.

RANGEFINDER DIRECTORS FITTED with the TYPE 285 AERIAL ARRAY - 1942-45

L/O/101

A and B

Sheet A

Sheet B

Sheet A shows an Isometric view of the Mark III W director, (as fitted to Black Swan class sloops etc) the construction of the 'Yagi' aerial. It also shows plan and side views of Types 285, 285/3, 285/M3 or M4 and detail of the windscreen, elevation and compensating gear.
With listings of ships so fitted (19 drawings).

Sheet B provides plan views of the Mark IV*, V* and V**. A GA of Director Rangefinder Mark IV (typical for Mark V* and V** of 1943). Isometric views of Mark IV, HA/LA Mark I Type 'K', HA/LA Mark 6, HACS Mark 4, Mark V and V*(M) HA/LA gunnery directors (14 drawings).

Two large sheets. 33 drawings total. Drawn January 1998.

HM "V" CLASS DESTROYERS - VETERAN, WALRUS WATERHEN and WITHERINGTON

L/O/102

The onboard smoke production apparatus, as fitted at Malta - September 1926. This early smoke apparatus was fitted to fleet destroyers aft on the quarterdeck.
The GA shows the deck layout plan and elevation and larger views the detail of the chemical and high-pressure air containers.

One medium sheet. 6 drawings. Drawn September 1998.

THE 6-PDR HOTCHKISS QF GUN in NON RECOIL MOUNTING 1941

L/O/103

This 1880's gun was brought back into service due to the acute shortage of naval weapons. Provided with a simple and basic mounting it was found on the bridge wings of a small number of Flower Class Corvettes from 1941 as well as being the main gun armament of some trawlers and drifters.

One medium sheet. 8 drawings. Drawn April 1999.

THE HEDGEHOG ANTI-SUBMARINE, AHEAD THROWING WEAPON 1942-45

L/O/104

A major weapon improvement over the usual depth charge, both the mounting, projectile, and its arming mechanism are included. The Mark III mounting is shown. Dimensions for the base and holding down bolts are provided. Text provides design background and detail.

One medium sheet. 12 drawings. Drawn April 1999.

THE 9-ft STEREOSCOPIC FQ2 RANGEFINDER on MQ1 and MQ12 MOUNTINGS 1918-21

L/O/105

This Rangefinder for smaller units was introduced aboard 'V' class fleet destroyers from 1917. It was gradually improved over the years. The MQ12 mounting of 1921 is drawn in detail. For surface gunnery use only, it was re-introduced for Algerine Class Fleet Minesweepers in 1941.

One medium sheet. 6 drawings. Drawn March 1999.

THE 0.5-in. VICKERS MACHINE GUN MARK III. GENERAL ARRANGEMENT 1942

L/O/106

A and B

Sheet A details the weapons construction (6 drawings).

Sheet B shows the action of the gun mechanism and detail of the ammunition (6 drawings).

Two medium sheets. 12 drawings total. Drawn March 1999.

THE 0.5-in. VICKERS MACHINE GUN MARK III (MODIFIED) for TURKISH SUBMARINES UNDER CONSTRUCTION at VICKERS ARMSTRONG 1941 (P.611, P.612, P.614 and P.615)

L/O/107

The gun, it's mounting, mechanism and ammunition box are shown.
The background history is detailed.

One medium sheet. 10 drawings. Drawn March 1999.

THE DESTROYER GUNNERY DIRECTOR CONTROL TOWER. GENERAL ARRANGEMENT for 'E' CLASS DESTROYERS of the 1931 CONSTRUCTION PROGRAMME

L/O/108

The DCT for the nine 'E' class units - ENCOUNTER, ELECTRA, ESCORT, ESCAPADE, EXPRESS, ESK and EXMOUTH.
Similar units were fitted to the following 'F', 'G' and 'H' fleet destroyer classes.

One medium sheet. 10 drawings total. Drawn March 1999.

THE PATTERN 12953 AIR DEFENCE LOOKOUT SIGHT. GENERAL ARRANGEMENT 1945

L/O/109

A basic, lightweight air lookout sight fitted to new construction. From 1945 a single manned aid to search for enemy aircraft from an air lookout position on the bridge.

One medium sheet. Almost completed.

UNITED STATES NAVY TYPE 'C' DEPTH CHARGE RACK - 1942

L/O/110

 

The standard single depth charge roll off rack fitted to US small craft during WWII.
The type shown here are typical of those carried by their wooden submarine chasers.

One medium sheet. 8 drawings. Originally drawn by Al Ross. Drawn May 1999.

UNITED STATES NAVY MARK 20 'MOUSETRAP' ANTI-SUBMARINE PROJECTOR - LATE 1943

L/O/111

 

Designed as a simple launcher for the 7.2-in. ASW projector.
A 4-round mini hedgehog launched over the bows of submarine chasers and other small craft.

One large sheet. 5 drawings. Originally drawn by Al Ross. Drawn May 1999.

UNITED STATES NAVY 40-mm BOFORS M1 GUN on HANDWORKED MARK 3 MOUNTING

L/O/112

 

This mass produced close range anti-aircraft mounting was also supplied to the RN under lease/lend, and is found in warships of all sizes.

One large sheet, 16 drawings. Originally drawn by Al Ross. Drawn July 1999. This subject has been redrawn and upated.

THE 4.7-in. QF MARK IX** DESTROYER GUN - 1943

L/O/113

 

This gun was the main armament of RN fleet destroyers from the1920s. It was used in both single and twin mountings and formed the basis of all wartime destroyers.
The gun, its construction and component parts has been redrawn from the gunnery manual BR1245(43)

One large sheet. 150 drawings. Drawn August 1999.

MINESWEEPING FAIRLEADS for FLEET MINESWEEPERS 1940-1945

L/O/114

 

Construction and general arrangement of M/S Kite and 'LL' Fairleads as fitted to Bangor and Algerine class Fleet Minesweepers.

One medium sheet. 17 drawings total. Drawn October 1999.

TORPEDO LOADING DAVIT for DESTROYERS 1943 - 1944

L/O/115

 

General arrangement and details for the torpedo loading and general purpose Davits as built by "Welin Maclachlan Davits Limited of London".

One medium sheet. 7 drawings. Drawn December 1999.

THE QFSA 4.7-in. (45 CALIBRES) CP TWIN MARK XIX MOUNTING 1937-45

L/O/116

A to E

Sheet A

Sheet C

Cutting

 

A fully detailed set of drawings of this potent twin mounting as fitted to Tribal, 'J','K' and 'L' Class Fleet destroyers.

Sheet A shows the prototype mounting as fitted to HMS HEREWARD dated 13/4/37
(8 drawings).
Sheet B gives a plan view plus sighting and hand ramming gear
(7 drawings).

Sheet C shows GA of production mountings
(8 drawings).
Sheet D provides detail of the gun shield and sighting ports
(15 drawings).
Sheet E shows construction and detail of training, elevating and depression control gear on the mountings (Dated October 1939)
(22 drawings).

Five large sheets. 60 drawings total. Drawn June and July 2000.

PROJECTED VICKERS ARMSTRONG DESIGN for TWO HIGH VELOCITY AUTOMATIC MACHINE GUNS on a TWIN MANUAL MOUNTING EARLY 1920s

L/O/117

 

The thinking behind new production after WWI to improve close range defence.

One medium sheet. 5 drawings. Drawn June 2000.

THE DEPTH CHARGE TRAP MARK I* - 1939 (for DEPTH CHARGE RAILS)

L/O/118

Detailed drawings for the assembly and construction detail for this standard equipment.

One large sheet, 26 drawings. Drawn August 2000.

DEPTH CHARGE EQUIPMENT - ARRANGEMENT of MARK I* DC RAILS for 12, 9, 6 or 3 DEPTH CHARGES from LATE 1941

L/O/119

 

Construction and detail of the rails including principle dimensions.

One medium sheet. 12 drawings. Drawn August 2000.

DEPTH CHARGE EQUIPMENT - ARRANGEMENT of MARK I* DC RAILS for 12, 9, 6 OR 3 DEPTH CHARGES from LATE 1942

L/O/120

 

Construction and detail of the rails including principle dimensions.

One medium sheet. 11 drawings. Drawn September 2000.

DEPTH CHARGE EQUIPMENT - ARRANGEMENT of DEPTH CHARGE DECK STOWAGE for 12, 18 or 24 CHARGES for ESCORT VESSELS 1943-44

L/O/121

 

Construction and detail of the rails including the principle dimensions.

One medium sheet. 9 drawings. Drawn August 2000.

1936 PROGRAMME DESTROYERS - DIRECTOR CONTROL TOWER for "J" CLASS DESTROYERS 1939

L/O/122

Fully detailed GAs both external and internal for HMS's JACKAL, JERVIS, JUNO etc (Also common to K and N classes). Changes to entry door are shown.

One large sheet. 11 drawings. Drawn September 2000.

BLAST BAGS for the TWIN 4-in. MARK XIX MOUNTING from 1941

L/O/123

Redrawn from the original blue linen instruction sheet, dated 11/9/41.
Includes fitting instructions and data.

One medium sheet. 6 drawings. Drawn September 2000.

READY USE AMMUNITION LOCKERS for QUAD 0.5-in. VICKERS MACHINE GUNS on "M" MARK III MOUNTINGS in USE from 1933 to 1942

L/O/124

Fully detailed, being redrawn from original drawings from the Ballast Trust and typical of fittings found in Modified V and W class destroyers, Flower Class Corvettes etc

One medium sheet. 12 drawings. November 2000.

THE 21-in. MARK VIII** SUBMARINE TORPEDO 1939 - 1983

L/O/125

The standard wartime submarine torpedo. (It was also carried by many Coastal Forces Craft).
Redrawn from the RN's Torpedo Manual. Both the G/A and component parts are shown.

One large sheet. 17 drawings. Drawn 1983 and updated December 2000.

RESERVED for the ANTI-SUBMARINE MORTAR MARK 10 - LIMBO

L/O/126

A and B

The standard post war A/S Frigate ahead throwing weapon.
Part drawn.

Two large sheets, ... drawings total. Not yet completed.

THE TSDS (TWO SPEED DESTROYER SWEEP) - EQUIPMENT and OPERATION 1939 - 1945

L/O/127

A to C

The high-speed sweep for moored mines was introduced in the Great War (1914-18). The rationale of its operation has been redrawn from official records.

Sheet A shows three sketches and the quarterdeck layout for HMS JUNO ('J' class Fleet Destroyer)
(5 Drawings).
Sheet B shows details of the "S" Mark I* Paravane, late 1920s Paravane winches, four sketches of the steam winches (1938) with other detail and data
(14 Drawings).
Sheet C provides detailed construction detail of both the port and starboard steam winches. Provided by Clarke Chapman Ltd.

Three large sheets. 24 drawings. Drawn April and May 2001.

THE SPLIT HEDGEHOG ANTI-SUBMARINE MOUNTING 1943/45

L/O/128

Detailed drawings taken from a number of official manuals showing this late war equipment, including ammunition.
Fitted to a number of sloops including some of the Modified Blacks Swan Class, where space did not permit the fitting of the full sized Hedgehog ahead throwing weapon.

One large sheet. 12 drawings. Drawn May 2001.

DEPTH CHARGE ARRANGEMENTS for HMAS NAPIER - "N" CLASS FLEET DESTROYER

L/O/129

Construction profile and detail of the 6-charge depth charge rail and the Mark I Depth Charge trap.
(Although drawn for HMAS NAPIER this equipment is standard to the J, K and N class fleet destroyers)

One medium sheet. 6 drawings. Drawn March 2001.

HMAS NAPIER - ELEVATION, DEPRESSION and TRAINING of GUNS and TORPEDO TUBES

L/O/130

The typical arrangement for 'J', 'K' and 'N' class fleet destroyers.
One large sheet. 13 drawings. Drawn May 2001.

THE THREE MAN RANGEFINDER - as FITTED to 'J', 'K' and 'N' CLASS FLEET DESTROYERS and as MODIFIED with WINDSHIELD ADDED and RADAR TYPE 285 M

L/O/131

A fully detailed drawing, redrawn from original material for the Modified Rangefinder and the Type 285 M ranging Radar array, as fitted above the original mounting. Bridge detail, fittings and data are also included.
One large sheet. 10 drawings. Drawn September 2001.

21-in. TORPEDO TUBES P R MARK II (1937) 'K' CLASS

L/O/132

A and B

Sheet A shows 21-in. Pentad (5) torpedo tubes as carried by 'J', 'K' and 'N' class fleet destroyers
(7 drawings) Drawn August 2001.
Sheet B to complete.
One large sheet, Sheet B not yet completed.

AIR DROPPED DEPTH CHARGES 1939 - 1945

L/O/133

The Mark VII airborne depth charge - conversion of the Naval mark VIII. Detail and Royal Air Force developments for Coastal Command.
One medium sheet. 9 drawings. Drawn June 2001.

THE COMBINED RANGEFINDER DIRECTOR MARK I of 1937-41

L/O/134

A new improved self contained mounting incorporating a combined rangefinder director that was introduced from 1938 aboard modified V & W class destroyers being converted as WAIRs, for anti-aircraft escort destroyer duties and the new Hunt class escort destroyers.
Drawn in detail this equipment was fitted with Type 285 Radar from late 1940 (aerials not shown)
One large sheet. 8 drawings. Drawn September 2001.

The AUSTERITY DIRECTOR MARK I of 1945. For USE with ADMIRALTY SIGHT MARK II

L/O/135

This new equipment was similar to the US Mark 51 director and suitable for use with any close range gun mounting. Fully detailed (PM 1997.1.174)

One large sheet. 6 drawings. Drawn December 2001.

THE SIMPLE TACHYMETRIC DIRECTOR MARK I. ARRANGED for USE with the ADMIRALTY SIGHT TYPE 6 MARK II of 1945

L/O/136

Similar but improved equipment to L/O/135.

One large sheet. 5 drawings. Drawn December 2001.

THE TORPEDO ANTI-SUBMARINE SIGHT MARK 2 - 1953

L/O/137

The post war bridge mounted sight.
Shows bridge layout (plan view) for the destroyer Cavalier of 1957.

One medium sheet. 5 drawings. Drawn November 2001.

THE QUAD 2-PDR POM POM MARK VII P* MOUNTING of 1944

L/O/138

A toC

A detailed examination of this modified and complex weapon system. Now with the addition of splinter protection, power operation and joystick control.
Sheet A shows the external detail.
Sheet B detail with the armour removed, and
Sheet C details of the power operated drives, joystick control etc.
(The later development of L/O/52/A-D)

Three large sheets. 30 drawings. Drawn December 2001 and February 2002.

THE 4-in. READY USE AMMUNITION LOCKER (LIGHT TYPE). For the HIGH ANGLE TWIN MARK XIX MOUNTING - BOTTLE RACK STOWAGE for 32 ROUNDS - 1941

L/O/139

Drawn from original material showing full detail including internal fittings, clips, hinges etc.

One large sheet. 15 drawings. Drawn December 2001.

THE 4-in. READY USE LOCKER (LIGHT TYPE). For HIGH ANGLE (VERTICAL STOWAGE) for TWIN 4-in. MARK XIX MOUNTINGS - 1941

L/O/140

Drawn from original material for the stowage of 24 rounds. Showing internal detail, cipls, hinges etc.

One large sheet. 16 drawings. Drawn December 2001.

RESERVED for READY USE LOCKER for QF 2-PDR POM POM "M" MARK VI (8 BARRELLED) - 1940

L/O/141

 
 

RESERVED for READY USE LOCKER for QF 2 PDR MARK VIII GUN (SINGLE) and MARK II*C GUNS

L/O/142

 
 

RESERVED for READY USE LOCKER for 0.5-in. POWER OPERATED MARK V MOUNTING (4 STOWAGE BOXES) - 1940

L/O/143

 
 

RESERVED for READY USE LOCKER FOR 0.5-in. POWER OPERATED MARK V MOUNTING (2 DRUMS) - 1940

L/O/144

 
 

THE AIR DEFENCE LOOK-OUT SIGHT PATTERN 12953 OF 1945

L/O/145

Fully detailed.

One large sheet. 10 drawings. Drawn November 2001.

TWIN SCREW CORVETTES - RIVER CLASS FRIGATES - INSTALLATION of TYPE 271 SURFACE SEARCH RADAR and OFFICE - JANUARY 1942

L/O/146

 

Redrawn from original plan, showing full construction and equipment detail.
One large sheet. 12 drawings. Drawn April 2002.

THE STANDARD STEAM WINDLASS GENERAL ARRANGEMENT 1941

L/O/147

 

The Clark Chapman Emerson Walker standardised steam and hand windlass.
One large sheet. 16 drawings. Drawn September 2002.

CASTLE CLASS CORVETTES - ANTI-SUBMARINE (ASDIC) COMPARTMENT

L/O/148

 

The layout of ASDIC with A/S set 147 introduced from late 1943. For destroyers, frigates, sloops, corvettes and fleet minesweepers. Drawn in detail.
One large sheet. 10 drawings. Drawn December 2002.

THE RANGEFINDER DIRECTOR MARK V** and TYPE 285 RADAR 1943 O and P CLASS DESTROYERS
L/O/149 The fitting of this equipment for 16 first and second emergency flotillas (O and P classes).
One large sheet. 9 drawings. Drawn November 2001.

71-ft 6-in. BRITISH POWER BOATS - INSTALLATION OF 18-in TORPEDO TUBES - The CONVERSION from MGB to MTB - 1944
L/O/150 A drawing showing the installation of 18-in torpedo tubes. The assembly of the torpedo loading chocks are also shown.
One medium sheet. 4 drawings. Drawn September 2003.

71-ft 6-in. BRITISH POWER BOATS - LAYOUT OF STEERING GEAR and the ARRANGEMENT of the MAIN FUEL TANKS - 1942
L/O/151 Layout of steering gear rods from drawing dated May 1943 and the arrangement of the five main self sealing fuel tanks holding 2739 gallons at 95% capacity.
One medium sheet. 8 drawings. Drawn September 2003.

71-ft 6-in. BRITISH POWER BOATS - ARRANGEMENT of the ARMOURED GUN PUMP SYSTEM
L/O/152 The diagrammatic layout showing the hydraulic, power operation of gun mounting 1943.
One medium sheet. 5 drawings. Drawn September 2003.

The ADMIRALTY 10" SIGNAL PROJECTOR.
L/O/153 The standard bridge signal light as fitted to all warships.
One medium sheet. 7 drawings. Drawn June 2004.

The ADMIRALTY 20" SIGNAL PROJECTOR - PATTERN 170A - 1940
L/O/154 The standard longer-range searchlight shown in detail.
One medium sheet. 7 drawings. Drawn June 2004.

The DIRECTOR CONTROL TOWER for "Q" and "R" CLASS FLEET DESTROYERS of the 3rd INTERMEDIATE PROGRAMME - 1943
L/O/155 Full external and internal detail of this now standard equipment. Redrawn from Vickers drawing No 3781.
One large sheet. 8 drawings. Drawn June 2004.

The SIGHT TRAINING TURRET for 20mm OERLIKON GUNNERS of POWER OPERATED MOUNTINGS WITH NEW GYRO GUN SIGHTS - 1944
L/O/156 A little known item of new equipment by "Marine Mountings" of Swindon, for training Coastal Forces gun crew members of Power Operated mountings and introducing the new Mark XIV Gyro gun sight.
One large sheet. 8 drawings. Almost Complete.

A SELECTION of BRITISH POWER BOAT COMPANY TORPEDO TUBES for various WARTIME and PREWAR CONTRACTS - 1937/45
L/O/157

A to C

Three sheets redrawn from original material detailing different designs for the USA, Holland, Sweden, and Norway in a number of different calibres. 11 different subjects and layouts are shown.. + Redrawn from original microfiche provided by the late George Selman, Chief Designer
Three large sheets. Drawn October 2004.

The THEORY and APPLICATION of POWER OPERATION to MINOR GUN TURRETS as fitted aboard RN COASTAL FORCES (and other units) during WW II
L/O/158 All the required hydraulic functions are described in detail and redrawn from the official manual.
One large sheet. 15 drawings. Drawn October 2004.

The BRITISH POWER BOAT COMPANY - DETAIL of UNDERWATER FITTINGS,STEERING GEAR,THROTTLE and ENGINE CONTROLS - 1939
L/O/159 Drawings from their official manual including methods used for steering and engine controls, the renewal of rubber Cutless propeller bearings, drawing off a propeller, detail of the stern tube, the automatic self-bailer and outlet sea cock.
One large sheet. 12 drawings. Drawn November 2004.

UNITED STATES NAVY MARK 19 - 21 Inch TORPEDO TUBE.
L/O/160 Drawn by co-author Al Ross of Bangor Maine, USA.
One medium sheet. 7 drawings. Drawn April 1991 and updated October 2004.

THE 24 INCH SEARCHLIGHT PROJECTOR MARK IIA OF 1941

L/O/161

 

The 24” Searchlight was introduced into the service from 1918 and remained the primary equipment until replaced by the 44” S.P. from 1936. This subject is drawn in detail from original Laurence Scott & Electromotors Ltd. of Norwich drawings. Found on sloops and Fleet and Escort Destroyers.
One large sheet. 8 drawings. Drawn August 2007.

THE 44 INCH SEARCHLIGHT PROJECTOR MARK VII”A” & “B” OF 1942-44

L/O/162

A to B

 

Redrawn from original drawings held at the Brass Foundry Woolwich Arsenal, this subject is drawn in full detail showing wartime construction changes. Equipment on Black Swan Class Sloops and Fleet Destroyers from 1940.
Two large sheets. 16 drawings. Drawn August 2007.

A PROJECTED TWIN MOUNTING FOR 0.5” HIGH VELOCITY VICKERS AUTOMATIC GUNS. REDRAWN FROM VICKERS UNDATED DRAWING No. 93423GB – About 1925.

L/O/163

Redrawn from original material found at the Cumbria Records Office, it shows the then current ideas for increasing close range firepower.
One large sheet. 5 drawings. Drawn December 2009.

A SINGLE MULTI-BARREL (4 Guns) MOUNTING FOR VICKERS 0.5” MACHINE GUNS. GENERAL ARRANGEMENT. - REDRAWN FROM VICKERS DRAWING No. 4440 GB.

L/O/164

Another projected design from Vickers after the Great War. It was not put into production but put forward for Foreign Navies.
One large sheet. 5 drawings. Drawn February 2009.

A PROJECTED DESIGN FOR A VICKERS TWIN 0.5” “M” (MULTIPLE) MOUNTING WITH L.V. (Low Velocity) AUTOMATIC GUNS. - ABOUT 1938.

L/O/165

 

Although not put into production it underwent considerable design and research. Redrawn from an “Office Copy” it shows an “Up and Over” twin Mounting, utilising parts from the existing “M” Mark II, II* and III Mountings. It may have been issued to the French Navy.
One large sheet. 6 drawings. Drawn February 2009.

THE GENERAL ARRANGEMENT OF TORPEDO DISCHARGE GEAR. AS FITTED TO C.M.B’s (Coastal Motor Boats) and “Q” SHIPS – 1915.

L/O/166

 

This subject has been redrawn from a Thornycroft manual discovered in an archive in Hampshire; It shows the stern launching method for discharging 18” Torpedoes as carried by 40 Ft and 55 Ft C.M.B’s
One large sheet. 12 drawings. Drawn August 2009.

SHIPBUILDERS DRAWINGS FOR COMMON WW II NAVAL WEAPONS.

L/O/167

A to B

 

A selection of line drawings for shipbuilders, showing dimensions etc. for 2 Pounder “M” Mark VII Pom Pom; Single 20mm Oerlikon Mark VIIA Mounting; Twin 40mm Bofors Mark V (Utility) Mounting; Single 40mm Bofors Mark VII Mounting; Twin 40mm Bofors S.T.A.A.G. Mark 2 Mounting; Twin 20mm Oerlikon Mark XII Mounting. (Sheet “A”).

12 Pounder H/A Mark IX Mounting; 40 mm Bofors R.P. 50 Mark 6 (Six Barrelled) Mounting; 2 Pounder Mark VIII Gun on P.O. (Power Operated) Mark XVI* Mounting; 4” Q.F. Mark XXI Gun on Mark XXIV Mounting. (Sheet “B”).

Two large sheets. 34 drawings. Drawn November 2010.

THE TORPEDO DIRECTOR SIGHT USED IN CONJUNCTION WITH THE THORNEYCROFT PATENT TORPEDO DISCHARGE GEAR – 1915.

L/O/168

Details of the alternative torpedo firing sights for fast, slow and those equipped “Q” Ships showing the wide range of alternatives for stern firing gear.
One large sheet. 5 drawings. Drawn August 2009.

RESERVED FOR THE SIX BARRELLED 40 mm BOFORS R.P. 50 MARK 6 MOUNTING.

L/O/169

A to C

Work has started but is discontinued for the time being.

 

Three large sheets. 2 drawings to date.

THE QUICK FIRING 2 POUNDER MARK VIII GUNS ON MOUNTINGS 2 Pdr. AA MARKS I & II FOR LAND SERVICE – 1940.

L/O/170

A to B

A little known Army mounting used for the protection of dockyards and other vital sites for anti-Aircraft protection. It used the standard 2 Pounder Mark VIII Gun in a complex mounting which was of the fixed type, cemented in concrete, but which could be transported by carriage and limber to other locations as required.
Two large sheets. 13 drawings. Drawn October/November 2010.

THE 4.5 INCH GUN ON THE MARK 8 MOD 1 MOUNTING – 2002

L/O/171

 

This modern weapon with it’s distinctive radar reducing gunshield, is fully automatic and independent. A crew of four maintain the mounting. It is in production and found on modern Destroyers and Frigates including the new Daring Class units.
One large sheet. 9 drawings. Drawn November 2010.

TAUT WIRE MEASURING GEAR AND MINESWEEPING EQUIPMENT – 1942.

L/O/172

 

This equipment was fitted to some River Class Frigates and Algerine Class units in order to increase navigation accuracy when minesweeping or minelaying. It took up valuable deck space so was made transferable.
One large sheet. 18 drawings. Drawn November 2010.

THE TWIN Q.F. 4.5 INCH MARK 3 (N) GUNS ON THE MARK 4 AND 4* MOUNTING – 1945. For the 1942 and 1943 BATTLE CLASS DESTROYERS.

L/O/173

A to C

This late wartime weapon was developed from the earlier Mark II Mounting to provide a much improved duel purpose gun for Fleet Destroyers. Only sheet “A” is completed to date, but this shows the gun, breech mechanism and four external views of the turret.
Three large sheets. 9 drawings. Drawn January 2011.

THE 3 INCH ROCKET PROJECTOR No 2 MARK I. THE HARVEY PROJECTOR – 1941.

L/O/174

In the spring of 1940 it was decided to utilise the potential of the 3 Inch Rocket for anti-Aircraft defence. Both the Army and the Navy co-operated in the development of this simple launcher. Some 537 Harvey Projectors were built.
One large sheets. 9 drawings. Drawn April 2011.

THE 4.7INCH Q.F. MARK VIII (N) GUN ON THE H/A MARK XII MOUNTING – 1928.
THE COMPLEX FIRST FULLY POWER OPERATED ANTI-AIRCRAFT MOUNTING FOR THE BATTLESHIPS NELSON & RODNEY.

L/O/175

A to E

This weapon was a request and sought after by readers. After much research I was able to find and copy an original Manual, I was then loaned a copy from H.M.S. Excellent Gunnery Museum at Portsmouth. (My thanks to them). This the first fully power operated mounting for the R.N., has resulted in a fully detailed set of drawings taking six months on my drawing board.

Sheet “A” provides the General Arrangements and details of the gun. (5 drgs).

Sheet “B” gives the system of power operation and the arrangement of recoil gear and running out (7 drgs).

Sheet “C” gives details of the sights an the training base. (10 drgs).

Sheet “D” shows the firing gear, trasining gear, elevating gear, and a diagramme of the electric cables and power circuits. (8 drgs).

Sheet “E” provides detail of the loading gear and trunnions, breech mechanism and more on the sights. (13 drgs).

Five large sheets. 43 drawings. Drawn June/November 2011.

THE .303 INCH HOTCHKISS LIGHT MACHINE GUN MARK I and I* - 1914 - 1945.

L/O/176

 

A light machine gun designed in France in 1903 for the French Army. It was built under licence at the Royal Small Arms Factory at Enfield and saw service in some smaller ships of the R.N.
One large sheet. 4 drawings. Drawn August 2011.

THE GENERAL ARRANGEMENT FOR 4 INCH GUNS ON “P” MARK II & III MOUNTINGS> (ABOUT 1906).

L/O/177

 

A standard weapon for destroyers and smaller units of the period. Both mountings are shown as is other construction detail. Redrawn from information held at the Hampshire Record Office in Winchester.
One large sheet. 11 drawings. Drawn January 2012.

THE GENERAL ARRANGEMENT OF 4 INCH MARK VII GUN ON P (PEDESTAL) MARK IV MOUNTING FROM 1904.

L/O/178

 

An Anti-Torpedo Boat weapon carried by heavy Dreadnaughts etc. Redrawn from information held at the Hampshire Record Office in Winchester.
One large sheet. 6 drawings. Drawn February 2012.

THE 4 INCH B.L. MARK VIII GUN ON P (PEDESTAL) MARK VII MOUNTING. – FROM 1913.

L/O/179

 

A low velocity weapon to become the main armament for the “K” Class destroyers of the 1911-12 Programme. Drawn in detail. Redrawn from information held at the Hampshire Record Office in Winchester.
One large sheet. 15 drawings. Drawn March 2012.

THE 4 INCH H.V. B.L. MARK VII GUN ON “P” (PEDESTAL) MARK VIII MOUNTING – 1909.

L/O/180

 

A High Velocity weapon carried by later Dreadnaughts and light cruisers to repulse destroyer attacks. Redrawn from information held at the Hampshire Record Office in Winchester.
One large sheet. 8 drawings. Drawn April 2012.

THE TWIN 40mm BOFORS S.T.A.A.G. (STABILISED TACOMETRIC ANTI-AIRCRAFT GUN MOUNTING MARK 2* and 3 of the 1950’s.

L/O/181

A to C

This very complex late wartime mounting was designed to be fully independent and radar controlled. Once the radar locked on it was considered that the target would be destroyed. Unfortunately the mounting was very complex and an ordinance artificers nightmare, plus it was expensive and in short supply. Sheet “A” commenced 5/04/2012. (9 Drgs).
Three large sheets.

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