Rolls-Royce Archives
| Identifier | Entry | ||
| img001 | Outlining the required characteristics and criteria for a proposed .5' air service gun. | ||
| View original record | C O P Y. SECRET To Hs. from Ve. Ve/NP.1/CB.25.10.39. PROPOSED AIR SERVICE .5" GUN. Before the scheme for the above gun can be prepared, it will be necessary to have some indication of what… | ||
| img002 | Comparison of specifications for various machine guns and anti-tank rifles. | ||
| View original record | - 2 - Ve/NP.1/CB.25.10.39 but the weapons listed below are those in use with the services at present :- Vickers Mark III, Naval Service (Water Cooled). Vickers Mark V, Land Service, for use in A.F.Vs.… | ||
| img003 | List of questions for the Air Ministry regarding the design priorities and required data for a new weapon system. | ||
| View original record | INFORMATION REQUIRED FROM AIR MINISTRY. What is the order of importance of the following :- Cheapness and ease of manufacture. Performance. High Muzzle velocity. High rate of fire. Light Weight.… | ||
| img004 | Letter requesting particulars on an experimental 40 mm. gun following a discussion with Sir Hugh Dowding. | ||
| View original record | RM Please reply to points 17/11/39 DEPARTMENT OA, 5 PERSONAL 16th November, 1939. Dear Hives, During a discussion yesterday with Sir Hugh Dowding the question of your experimental 40 mm. gun was… | ||
| img005 | Visit to Vickers' and Bristol Aviation companies to discuss the installation of a 40mm gun. | ||
| View original record | SECRET. To Hs. from Rm. Rm.5/MH.20..11.39. VISIT TO VICKERS' AVIATION COMPANY, WEYBRIDGE AND BRISTOL AVIATION COMPANY, FILTON TO DISCUSS THE INSTALLATION OF THE 40 m.m. GUN. Vickers' Aviation Co. On… | ||
| img006 | Installation of 40mm guns on Bristol Beaufighter and a new experimental bomber. | ||
| View original record | -2- It does not seem to be worth while carrying out this complete re-design until the experimental features of the turret have been proved. It was worth investigating, however, because if the turret… | ||
| img007 | Letter to Wing Commander Helmore detailing the development and specifications of a 40 m.m. gun. | ||
| View original record | Rm.6/MH. 21st. November, 1939. Wing Commander Helmore, Department OA, Air Ministry, King Charles Street, Whitehall, S.W.1. Dear Helmore, Hives has asked me to reply to your letter of November 16th. I… | ||
| img008 | Letter to W. A. Rowbotham arranging a visit to see the 40 mm gun. | ||
| View original record | SECRET S DEPARTMENT OA, 24th November, 1939. Dear Rowbotham, I should like to come up and see the 40 mm. gun, but as it is difficult just now to fix a definite date ahead, I will ring you up shortly… | ||
| img009 | Visit to Boulton & Paul regarding a gun project and its integration into their turrets. | ||
| View original record | SECRET. 5 To Hs. from Rm. Rm.2/MH. 4.11.39. VISIT TO BOLTON & PAUL'S RE GUN PROJECT. In company with Ve. we visited Bolton & Paul's on Thursday, November 23rd. to have a look at their range and to… | ||
| img010 | Minutes of a meeting of the Armament Division discussing the 40mm gun. | ||
| View original record | C O P Y. SECRET. 5 Rm.9/MH.30.1.40. MINUTES OF MEETING OF THE ARMAMENT DIVISION MONDAY, JANUARY 29th. Present:- Hs. Air Commodore Andrews, Major Thompson, Ve. Ve/NP. Rm. 40 mm. GUN. Contract Position.… | ||
| img011 | Specifications for a 13.2mm aircraft gun intended to follow the 40mm gun, including production considerations. | ||
| View original record | - 2 - Rm.9/MH.30.1.40. on guns the range would find its keep, but that should the armament work fall off it would be a dead loss to Rolls-Royce Ltd. and they would expect to be compensated for it.… | ||
| img012 | The completion date for a gun prototype and the inspection of other available guns. | ||
| View original record | - 3 - Rm.9/MH.30.1.40. Date of completion of Prototype. Major Thompson emphasised that a gun with a high rate of fire was going to be much more difficult than the single shot gun and Mr. Viale… | ||
| img013 | Secret summary of opinions from the Air Force on a gun project and future armament requirements. | ||
| View original record | SECRET. RHF 5 To Hs. from Rm. C. L. P. Rm.4/MH.6.2.40. GUN PROJECT. The R.R. Armament Division have been given the 13.2 gun as their next project by the Air Ministry. With the object of ascertaining… | ||
| img014 | Future aircraft armament options, comparing various gun calibers including the Hispano. | ||
| View original record | -2- Rm.4/MH.6.2.40. Any new design, therefore should (1) Be able to pierce any armour plate that the enemy may reasonably be expected to use. (2) Have sufficient rate of fire and length of burst to… | ||
| img015 | Letter regarding guns and enclosing a copy of another letter for information. | ||
| View original record | Guns. 5 191 QUEENS GATE S.W. 7 KENSINGTON 9201 18/4/40 My dear Ron, I enclose copy of a letter sent to Maj. to H.S. for your information. There were a lot of points mentioned by Downing in the Council… | ||
| img016 | Letter to Hives detailing a meeting with Sir Hugh Dowding concerning the development of aircraft guns and flame traps. | ||
| View original record | COPY 18th.April, /40. Dear Hives, With regard to the matters discussed at my visit to Derby on the 10th., the following action has been taken. Guns. I had a two hour meeting yesterday with Sir Hugh… | ||
| img017 | Letter discussing the cause and potential solutions for flame trap burning, addressed to E.W. Hives. | ||
| View original record | -2- 18th.April, /40 rather an old point revived) was raised by Sir.H. yesterday. He considers that flame trap burning is produced by the combustion of gum and dirt deposited on the trap by unfiltered… | ||
| img018 | Letter to Wing Commander Helmore confirming a meeting and requesting information on the efficacy of the 20mm gun for a projected armament programme. | ||
| View original record | Rm.7/ML. Wing Commander Helmore, Engineering Laboratory, Cambridge. Dear Helmore, Confirming our telephone conversation of yesterday morning, we shall hope to see you and your wife up here in about 10… | ||
| img019 | Letter to Sir Charles Craven concerning a visit by Sir John Salmond to discuss the 13.2 and 40 mm guns, their priority, and use in aerodrome defence. | ||
| View original record | COPY Rm.4/MT. 17.40 17.7.40 Dear Sir Charles, We had a visit from Sir John Salmond on Saturday last, and showed him both the 13.2 and 40 mm. guns. We confirmed the urgency of the 13.2 and this is… | ||
| img020 | Letter to the Air Ministry requesting material release for the production of 13.2 mm and 40 mm guns. | ||
| View original record | COPY. Pm.3/M. 1.7.40. A.D.Arm.P.1. Air Ministry, Dept., Z.1. Harrogate. For the attention of Mr. MacDonald. Dear Mr. MacDonald, I should be very glad if you would remind Sir John Salmond that we want… | ||
| img021 | Summary of the fighter aircraft armament position, highlighting the need for heavier calibre weapons. | ||
| View original record | ARMAMENT POSITION - FIGHTER AIRCRAFT. After discussion with the design staffs of the two fighter aircraft producing Companies in this country, it appears that the armament position is less… | ||
| img022 | Optimizing fighter aircraft armament, focusing on gun installations and ammunition capacity. | ||
| View original record | - 2 - Cont'd. Rm.11/ML.7.7.40. IS THE BEST POSSIBLE USE BEING MADE OF THE GUNS AVAILABLE. i.e. THE .303 AND THE 20 mm. HISPANO. 2-gun 20 mm. installations are at present being introduced in the… | ||
| img023 | Summary questioning the logic behind armament decisions and production for fighter aircraft. | ||
| View original record | - 3 - Rm.11/ML.7.7.40. Cont'd. The logic, therefore behind refusing to take an interest in increased ammunition in fighter aircraft, does not seem to be sound. SUMMARY. Are the more important people… | ||
| img024 | Secret report on armament schemes for Spitfire and Hurricane aircraft. | ||
| View original record | Hs. from Rm. SECRET. Rm.1/ML.8.7.40. 5. ROLLS ROYCE .5 GUN IN SPITFIRE AND HURRICANE. With a view to obtaining first-hand information as to the position of the Browning half-inch gun in Spitfires and… | ||
| img025 | Aircraft armament installations, including various gun types, wing modifications, and turret options. | ||
| View original record | - 2 - Cont'd. the armament position. He is also exceedingly sore about Brownings but is only allowed to put six in. The wings and the pieces for the six are being made but he has not yet seen the gun… | ||
| img026 | Letter to Mr. Robotham regarding Admiral Evans's decision on using the 40mm gun for ground defence. | ||
| View original record | 5 Dept.OA, 8th July, 1940. W.A. Robotham, Esq., Rolls-Royce Limited, DERBY. Dear Mr. Robotham, As I promised you, I took up with Admiral Evans the question of using your 40mm. gun for ground defence.… | ||
| img027 | Tracing of a Hawker Aircraft Co. drawing showing .303 and .5 bore Browning machine guns mounted in a Hurricane wing. | ||
| View original record | To Rm. c to Rm/HH. re Aircraft Armament. Attached to Rm/HH's copy of this memo. is the original of PL.279, which is a tracing of a drawing by the Hawker Aircraft Co. showing .303 and .5 bore Browning… | ||
| img028 | Letter regarding aircraft armament, specifically the mounting of guns on Hurricane and Spitfire wings. | ||
| View original record | To Ev. c. to Rm. 3. c.5 re Aircraft Armament. We have much pleasure in returning herewith the print by the Hawker Aircraft Co. showing guns mounted in the Hurricane wing which you kindly lent to us a… | ||
| img029 | Analyzing various gun sizes and weights, comparing the Hispano and Oerlikon 20mm guns. | ||
| View original record | To Rm. from Ve/NP. Ve/NP.2/CB.17.7.40. In reply to your memo Rm.2/JMS.13.7.40, Ev. was handed the installation drawing of the 13.2 on Saturday morning. Attached herewith is the analysis of gun sizes,… | ||
| img030 | Graph detailing alternative gun installations for a Spitfire aircraft. | ||
| View original record | ALTERNATIVE GUN INSTALLATION FOR SPITFIRE AIRCRAFT Based on Weight of existing 8 - .303 Browning Guns + 300 Rounds per gun). Curve Labels: Energy per Second. Total Available Energy Energy per Round… | ||
| img031 | Graph showing weight calculations for alternative gun installations on Spitfire aircraft. | ||
| View original record | ALTERNATIVE GUN INSTALLATION FOR SPITFIRE AIRCRAFT Based on weight of 8 - .303 Browning Guns + 300 Rounds per Gun. 8 Guns. 7 Guns. 6 Guns. 5 Guns. 4 Guns. 3 Guns. 2 Guns. 1 Gun Weight in Pounds 100… | ||
| img032 | Graph plotting weight against muzzle velocity and rate of fire for an alternative gun installation on a Spitfire aircraft. | ||
| View original record | Title: ALTERNATIVE GUN INSTALLATION FOR SPITFIRE AIRCRAFT. (Based on Weight of existing 8 - .303 Browning Guns + 300 Rounds per gun). X-Axis Top: Muzzle Velocity - Feet per sec X-Axis Bottom: Rate of… | ||
| img033 | Blueprint detailing aircraft armament specifications with a top-down schematic. | ||
| View original record | 8 - 7.7m/m GUNS. 300 ROUNDS OF AMMUNITION PER GUN RATE OF FIRE 1100 ROUNDS PER MINUTE PER GUN. MUZZLE VELOCITY 2440 FT./SEC. 4 - 12.5m/m GUNS | ||
| img034 | Blueprint detailing gun specifications and the wing planform for an aircraft. | ||
| View original record | 7-8 .5% GUNS 274 ROUNDS OF AMMUNITION PER GUN. RATE OF FIRE 1030 ROUNDS PER MINUTE PER GUN. MUZZLE VELOCITY 2500 FT/SEC. | ||
| img035 | Blueprint of an aircraft showing wing armament layout and gun specifications. | ||
| View original record | 8 - 9.5% GUNS 250 ROUNDS OF AMMUNITION PER GUN. RATE OF FIRE 970 ROUNDS PER MINUTE PER GUN MUZZLE VELOCITY 2580 FT/SEC. | ||
| img036 | Blueprint of an aircraft's wing planform detailing its armament specifications. | ||
| View original record | 5 - 10.7 M/M GUNS. 220 ROUNDS OF AMMUNITION PER GUN RATE OF FIRE 890 ROUNDS PER MINUTE PER GUN MUZZLE VELOCITY 2650 FT/SEC. | ||
| img037 | Blueprint detailing armament specifications and gun layout for an aircraft. | ||
| View original record | 190 ROUNDS OF AMMUNITION PER GUN. RATE OF FIRE 780 ROUNDS PER MINUTE PER GUN. MUZZLE VELOCITY 2730 FT/SEC. | ||
| img038 | Blueprint for an alternative aircraft gun installation, possibly for a Spitfire. | ||
| View original record | OF GUNS 63 ROUNDS OF AMMUNITION PER GUN RATE OF FIRE 660 ROUNDS PER MINUTE PER GUN MUZZLE VELOCITY 2820 FT/SEC. ALTERNATIVE GUN INSTALLATION BASED ON WEIGHT OF EXISTING 8-.303 B | ||
| img039 | Blueprint detailing gun specifications and a schematic for a Spitfire aircraft. | ||
| View original record | 2 - 19.5 m/m GUNS 135 ROUNDS OF AMMUNITION PER GUN RATE OF FIRE 480 ROUNDS PER MINUTE PER GUN. MUZZLE VELOCITY 2880 FT/SEC N FOR SPITFIRE AIRCRAFT. ING GUNS + 300 ROUNDS PER GUN | ||
| img040 | Blueprint showing a top-down view of an aircraft with gun specifications. | ||
| View original record | 1 - 29.5 m/m GUN. 100 ROUNDS OF AMMUNITION PER GUN RATE OF FIRE 240 ROUNDS PER MINUTE PER GUN MUZZLE VELOCITY 2770 FT/SEC. ROLLS-ROYCE LTD. PRINT ROOM 1 MAR 1940 DERBY. QS.57 | ||
| img041 | Extract from a letter from Mr. Frise regarding firing tests on a blast tube for the 'Beaufighter' installation. | ||
| View original record | Rm. Gunn 5 Lp.14/JL. 23. 7. 40. The following is an extract from a letter received from Mr. Frise :- "Whilst they are doing the firing, I should like them to kill two birds with one stone and test the… | ||
| img042 | Request for up-to-date gun installation drawings for the Beaufighter aircraft. | ||
| View original record | Rm. Lp.16/JL. 23. 7. 40. RE: BEAUFIGHTER. Mr. Frise requests that you send him up to date installation drawings of the Gun so that the necessary preliminary work can be put in hand for its… | ||
| img043 | Authorization note for the collection of a gun loaned from a Hurricane for return to Hucknall. | ||
| View original record | Gun 5 F/H 24.7.40. Please allow bearer (A.Smith) to collect gun loaned from hurricane for return to hucknall. Received. A Smith 20361 [illegible signature] | ||
| img044 | Letter to the Ministry of Aircraft Production regarding firing trials of a 13.2 m/m gun. | ||
| View original record | Rm.3/JMS. Ministry of Aircraft Production, Dept. T.A., Harrogate, Yorks. For the attention of Sir John Salmon. Dear Sirs, We understand that you have been making some enquiries as to the firing trials… | ||
| img045 | Letter to the Chief Aircraft Designer at Bristol Aircraft Factory regarding the 40 m/m cannon gun. | ||
| View original record | Gun 25.7.40. Rm.8/JMS. D. Frise, Esq., Chief Aircraft Designer, Bristol Aircraft Factory, BRISTOL. Dear Mr. Frise, I understand from Mr. Lappin that you hope to come down to Derby next week to discuss… | ||
| img046 | Letter from Bristol Aeroplane Company regarding the installation and testing of a 40mm cannon on a Beaufighter aircraft. | ||
| View original record | ALL COMMUNICATIONS SHOULD BE ADDRESSED TO THE COMPANY AND NOT TO INDIVIDUALS. LONDON OFFICE 6, ARLINGTON STREET, ST. JAMES'S, S.W.1 TELEPHONE:- REGENT 0957-8 TELEGRAMS: BRISTAIRCO, PICCY, LONDON. THE… | ||
| img047 | Letter to de Havilland Engine Co. Ltd. about supplying a special carburettor for a Gipsy VI aero engine. | ||
| View original record | RM.1/NL. H.C.Prins, Esq., de Havilland Engine Co.Ltd., Stag Lane, Edgware, Middx. Dear Sirs, Thank you for your letter of August 2nd. We shall be only too pleased to fit you up with what you require,… | ||
| img048 | Development work and testing for 40mm guns for the Admiralty and the Beaufighter. | ||
| View original record | COPY. Vo. from Rm. Rm.1/ML.12.8.40. DEVELOPMENT WORK - 40 mm. GUNS. ----------------------------- We now have two 40 mm. guns available for development work. ADMIRALTY GUN. There are two pieces of… | ||
| img050 | Letter from the Ministry of Aircraft Production requesting information on the progress of the .5 machine gun. | ||
| View original record | 5 TELEPHONE: FRANKLIN 2211 Extn. 1571 MINISTRY OF AIRCRAFT PRODUCTION, Thames House, MILLBANK, S.W.1. From : Marshal of the Royal Air Force, Sir John M. Salmond. 22nd August, 1940. Dear Mr. Hives, I… | ||
| img051 | Clarifying production numbers for 40mm Type BB automatic aircraft guns and halting further work. | ||
| View original record | To Hs. from Ve. c. HPS. c. Rm. c. G/Rb. c. Lr/Brns. Ve.6/CB.23.8.40. 40 mm. TYPE BB AUTOMATIC GUNS FOR AIRCRAFT. There seems to be some confusion as to the number of type BB guns (automatic guns for… | ||
| img052 | Progress report on the experimental firing trials of a half-inch gun, detailing reliability issues. | ||
| View original record | Rm.2/JL. 25.8.40. Sir John Salmond, Ministry of Aircraft Production, Thames House, Millbank, S.W.1. Dear Sir John, Mr. Hives has handed me your letter of the 22nd. August regarding the half inch gun.… | ||
| img053 | 40mm gun, including drawings for the Admiralty, sea-water trials, and installation in a Beaufighter. | ||
| View original record | Ve. from Rm. Rm.19/ML.25.8.40. FILE Sent copy instead 40 mm. GUN. 1. DRAWINGS FOR THE ADMIR'LTY. I suggest that we do not send drawings to the Admiralty, of the 40 mm. gun until we have tested the two… | ||
| img054 | Letter to the Bristol Aeroplane Company regarding the testing of a 40mm gun and coordinating a visit. | ||
| View original record | Rm.20/AL. 25.6.40. D.Frise,Esq., Chief Aircraft Designer, Bristol Aeroplane Company, Filton House, BRISTOL. Dear Frise, Have you any gun mounting bits which you would like us to test on our Range here… | ||
| img055 | Questioning the suspension of work on 40 mm type BB automatic guns for installation in a Beaufighter aircraft. | ||
| View original record | from HPS. c. Rm. 5 HPS.1/EP.30.8.40. 40 mm. type BB Automatic Guns for Aircraft. Replying to Ve.6/CB.23.8.40 we would refer you to minutes of conference held on Saturday, August 3rd, ref.… | ||
| img056 | Secret memo discussing the installation drawing and fitment challenges for a 13.2mm machine gun into an aircraft wing. | ||
| View original record | SECRET. To Rm. from Ev. re Installation Drawing type A7A. Gun. 13.2 m.m. M.G. We have now received several prints of QA.1100, the installation drawing of the 13.2 m.m. M.G. type A.A. As we think that… | ||
| img057 | Comparison of gun dimensions and installation difficulties in various fighter aircraft wings. | ||
| View original record | Cont'd. The plan width of our gun is 1.100 in. more than that of the Browning. In the case of the Spitfire this causes difficulty with installing the gun plus clip chute into the existing bay in the… | ||
| img058 | The construction of two 40mm Type BB automatic guns for aircraft from existing experimental units. | ||
| View original record | To HPS. from Ve. c. to Rm. 5 Ve/NP.5/CB.3.9.40. 40 mm. TYPE BB AUTOMATIC GUNS FOR AIRCRAFT. In reply to HPS.1/EP.30.8.40, our memo Ve.6/CB.23.8.40 was intended to convey that no new automatic guns… | ||
| img059 | Plans for building two further automatic guns following trial completion. | ||
| View original record | When trials with these two guns have been completed, a further two automatic guns will be put in hand, one built up from the parts of gun No. 11239 and the other built up from new parts to be… | ||
| img060 | Copy of a telegram arranging a meeting regarding a cannon gun installation. | ||
| View original record | C O P Y. FRISE BRISTOL AEROPLANE COMPANY FILTON HOUSE BRISTOL CAN YOU SEE ME TOMORROW AFTERNOON RE CANNON GUN INSTALLATION WIRE REPLY CARE OF SELMAN POWER BOAT COMPANY HYTHE ROBOTHAM ROLLS ROYCE. | ||
| img061 | Letter from Vickers-Armstrongs regarding a drawing for a Spitfire gun installation. | ||
| View original record | TELEPHONE: WOOLSTON 88201 (8 LINES) TELEGRAMS: SUPERMARIN, SOUTHAMPTON. Vickers-Armstrongs Limited. (AIRCRAFT SECTION) SUPERMARINE WORKS SOUTHAMPTON - Rowbotham Esq., Rolls-Royce Limited, DERBY. YOUR… | ||
| img062 | Letter to Vickers-Armstrong Ltd. regarding the testing of a Griffon engine mounting and the power plant for a prototype aircraft. | ||
| View original record | Yr ref SM/10595/C Rm.10/ML. 10.9.40. C. Smith, Esq., Vickers-Armstrong Ltd., Supermarine Works, SOUTHAMPTON. Dear Mr. Smith, I have had a talk with our people regarding the tests of your mounting for… | ||
| img063 | Brief progress update on the development of the Reid test gun for the Ministry of Aircraft Production. | ||
| View original record | RM.2/M. 11.9.40. Ministry of Aircraft Production, Thames House, Millbank, London. S.W.1. For the attention of Sir John Almond. Dear Sirs, Further to our letter of 28th. August, reference R.M.2/M. The… | ||
| img064 | Arrangement drawing for a .500 bore Browning machine gun for aircraft. | ||
| View original record | SECRET. To Ve. from Ev. c. to V./NP. c. to Rm. re .500 Bore Machine Guns for Aircraft. During a visit to the South last week-end we were able to discover that the Air Ministry's latest arrangement… | ||
| img065 | Difficulties of installing a type A.A. .500 machine gun into a Spitfire wing. | ||
| View original record | To Ve. from Ev. c. to Rm. c. to Ve/NM. SECRET. Ev.3/JH.14.9.40. re .500 M.G. type A.A. We thank you for the original of the type A.A. gun in No.3 bay of a Spitfire wing which we lent to you. It has… | ||
| img066 | Recommendations for modifying A.A. guns for installation, referencing the Browning gun and discussions with Supermarine. | ||
| View original record | Cont'd. 1. Coinciding the guns as previously stated (see QW.131) the fixing bolts should also coincide. At the moment the type A.A. gun dimension is approximately .125 ins the greater. 2. Reduce the… | ||
| img067 | Photographs of .303 Browning Guns in the wings of Spitfire and Hurricane aircraft. | ||
| View original record | To Rm. from Ev. c.c. RV Va SECRET File on fool sheets Ev.2/JH.16.9.40. Rm re .303 Browning Guns in Wings. 5 Attached is a set of photographs of the Browning .303 M.G. in the wings of a Spitfire and a… | ||
| img068 | Photograph of two ammunition boxes for a Hurricane aircraft, one closed and one with its lid open. | ||
| View original record | HURRICANE S I . P3416 | ||
| img069 | Photograph of ammunition magazines for a Hurricane aircraft. | ||
| View original record | HURRICANE P3416 IS | ||
| img070 | View of the internal gun bay of a Hawker Hurricane aircraft, showing a Browning machine gun and ammunition boxes. | ||
| View original record | HURRICANE P3416 S I BROWNING MGS D S.51548 U.S.A 1940 IMPORTANT 3 | ||
| img071 | Photograph showing a section of a Hurricane aircraft fuselage with an open maintenance panel. | ||
| View original record | HURRICANE | ||
| img072 | Photograph of the open gun and ammunition bay in the wing of a Spitfire aircraft. | ||
| View original record | SPITFIRE On placard: AMMUNITION BOXES [...] ALLOWED TO [...] TOUCH AT [...] | ||
| img073 | Photograph of a hinged metal panel from a Spitfire aircraft. | ||
| View original record | SPITFIRE | ||
| img074 | Photograph showing the internal structure of a Spitfire wing with various access panels open. | ||
| View original record | SPITFIRE | ||
| img075 | Internal photograph of a Spitfire aircraft fuselage showing the structure, mechanisms, and open access panels. | ||
| View original record | SPITFIRE BOXES MUST BE PUSHED IN TO FULL EXTENT | ||
| img076 | Photograph of a Spitfire fuselage under construction or maintenance, resting on a wooden trestle. | ||
| View original record | SPITFIRE | ||
| img077 | Photograph of a .303 Browning machine gun. | ||
| View original record | .303 BROWNING. | ||
| img078 | Copy of a message arranging a meeting with Mr. Frise of the Bristol Aeroplane Company. | ||
| View original record | C O P Y. 18.9.40. FRISE BRISTOL AEROPLANE COMPANY, FILTON HOUSE. BRISTOL. SHALL BE AT BRISTOL TOMORROW THURSDAY BETWEEN TWELVE AND ONE ROBOTHAM ROLLS-ROYCE. | ||
| img079 | Letter to the Ministry of Aircraft Production regarding the release of information on a 40 mm gun to the American Embassy. | ||
| View original record | Ve/NP.3/CB. 18th September, 1940. Lord Brownlow, Ministry of Aircraft Production, Millbank, LONDON, S.W.1. Sir, In accordance with arrangements made with Colonel Studler of the American Embassy, we… | ||
| img080 | The installation progress and operational requirements for a 40mm gun in a Beaufighter aircraft. | ||
| View original record | Va. from Dr. C. HS. C. RV. file S RA.7/M.E.R.20.9.40. 40 m/m. GUN IN BEAUFIGHTER. Having failed to get Frise to Derby we visited Bristol to see what progress he had made with the installation of the… | ||
| img081 | Notes on Beaufighter armament, including 20mm and 40mm cannons, and issues with the Hispano gun. | ||
| View original record | Cont'd. - 2 - 2. They understand that one model of the Beaufighter with four cannon guns is definitely going to be used for ground strafing tanks. The gun installation will be normal, i.e. the axis of… | ||
| img082 | The problems and limitations of installing various guns in aircraft turrets. | ||
| View original record | - 3 - Cont'd. HALF INCH GUN. They emphasize that the problems on turrets of feed and disposal of links and ejection were becoming increasingly difficult because the Air Ministry were calling for… | ||
| img083 | Progress report on the installation and testing of a 40mm gun in a Beaufighter aircraft. | ||
| View original record | Vs. from Fm. C. Hs. C. HV. file RA.7/M.L.4 20.9.40. 40 mm. GUN IN BEAUFIGHTER. Having failed to get Frise to Derby we visited Bristol to see what progress he had made with the installation of the gun… | ||
| img084 | The use of cannon guns in Beaufighter aircraft, including details on 20 mm guns. | ||
| View original record | Cont'd. - 2 - 2. They understand that one model of the Beaufighter with four cannon guns is definitely going to be used for ground strafing tanks. The gun installation will be normal, i.e. the axis of… | ||
| img085 | Discussions with Parnall B. & P. Ltd. concerning aircraft turret armament and ammunition feed system limitations. | ||
| View original record | - 3 - Cont'd. PARNALL B. & P. Ltd. They emphasise that the problems on turrets of feed and disposal of links and empties were becoming increasingly difficult because the Air Ministry were calling for… | ||
| img086 | Blueprint showing the arrangement and clamping of four rounds or cylinders. | ||
| View original record | .950 CRS 90° 21.S.W.G. (.032) 2ND ROUND ¢ 1ST ROUND ¢ 30° R | ||
| img087 | Blueprint detailing a component with dimensions and rivet specification. | ||
| View original record | QPL 140 4TH ROUND ROUND .218 .093 DIA RIVET | ||
| img088 | Blueprint drawing for a component named 'CLIP-13.2 A'. | ||
| View original record | 127° NOTE:- THIS ANGLE BE INCREASED 95° IN WHICH EVERY THING IS AT RIGHT SCALE 2/1 CLIP - 13.2 A | ||
| img089 | Blueprint for an ammunition case or clamp. | ||
| View original record | CAN ED TO H CASE D ROUND ANGLES AMMUNITION e.D. Griffiths 25.9.40 QPL 140 | ||
| img090 | Letter to Bristol Aeroplane Co. requesting information on harmonising gears, electro-pneumatic firing gears, and turret installations. | ||
| View original record | Rm.S/ML. 20.9.40. D.L.Frise,Esq., Bristol Aeroplane Co., Filton House, BRISTOL. Dear Frise, Thank you for the interesting time you gave us yesterday. I would be grateful for any information you can… | ||
| img091 | Confidential memo discussing the installation of a 40 m.m. automatic gun in the Beaufighter aircraft. | ||
| View original record | CONFIDENTIAL. 5 To Rm. from Ev. Ev.2/JH.26.9.40. re 40 m.m. Gun in the Beaufighter. I spoke to Ve. on the telephone this morning re the installation of the 40 m.m. automatic gun in the Beaufighter. He… | ||
| img092 | Supply and retention of 40mm gun barrels for an Air Ministry contract. | ||
| View original record | To-HPS. from Ve. c. to Ws. c. to Rm. c. to Ir/Erne: c. to G/Rb. 5 Ve.7/CB.1.10.40. 40 mm. Type BD Gun As the B.U.S.M. will presumably make their own arrangements for the supply of barrels for the 500… | ||
| img093 | Outlining the progress of various gun installation projects. | ||
| View original record | SECRET. To Rm. from Ev. Ev.2/JH.5.10.40. re Gun Installation Section. We think it might be advantageous to outline the progress of the Gun Installation Section up to date. 1. Type B.D. Naval Gun - on… | ||
| img094 | Progress report letter to the Ministry of Aircraft Production on the development of a half-inch gun. | ||
| View original record | Rm.2/ML. 7.10.40. S The Ministry of Aircraft Production, Thames House, Millbank. LONDON. For the attention of Sir John Salmond. Dear Sirs, HALF INCH GUN. Some considerable progress has been made… | ||
| img095 | Letter to the Minister of Aircraft Production regarding a contract for the development of 13.2 mm and .5 inch recoil-operated machine guns. | ||
| View original record | c. Hs. c. Ve. c. Blb. c. G/Rb. D/L. c. D/BP. HPS/CEP. Hs/Brns.l/WI. 7th October 1940. The Secretary, The Minister of Aircraft Production, Thames House Millbank, London S.W.1. For the attention of the… | ||
| img096 | Details on the conversion of 13.2mm guns, supply of spare barrels, and a list of pre-production models. | ||
| View original record | -2- (a) Conversion of two 13.2 m.m. to .5 in.type machine guns. As previously explained the 13.2 m.m. guns are obsolete having no application in M.A.P's present programme. Conversion will entail a new… | ||
| img097 | Letter detailing costs, contractual amendments, and supply information for .5 inch gun development. | ||
| View original record | -3- The estimated total cost of these models is £400. Contractual cover is requested for the foregoing development features and in the event of your agreement, will you kindly inform us whether, Item… | ||
| img098 | Inquiry regarding the manufacturer of protective containers for storing prints, following an air-raid. | ||
| View original record | Rm.3/ML. D.L.Frise,Esq., Bristol Aeroplane Co.Ltd., Filton House, BRISTOL. Dear Frise, I am sorry to hear about your air-raid but understand that you escaped unharmed. I hope that you are none the… | ||
| img099 | Potential interchangeability of a Type A.A. gun with a .500 Browning by using the same mounting in a Spitfire Wing. | ||
| View original record | Re VG/NH from Ev. c. to Hm. Ev.3/JH.14.10.40. 5 re Type A.A. Gun. Very many thanks for your [illegible due to signature] re our Ev.3/JH.14.9.40. concerning the installation of the type A.A. Gun in the… | ||
| img100 | Requesting a full-size drawing of the R.R. feed for the 40 m.m. gun installation in a Beaufighter aircraft. | ||
| View original record | To Ve. c. to Rm. re 40 m.m. Gun in Beaufighter. Rm. is anxious that we should make some progress with the installation of the 40 m.m. gun in the Beaufighter both with the R.R. feed and the B.U.S.M.… | ||
| img101 | Letter from the Bristol Aeroplane Company regarding guns in turrets and drawing office containers. | ||
| View original record | ALL COMMUNICATIONS SHOULD BE ADDRESSED TO THE COMPANY AND NOT TO INDIVIDUALS. LONDON OFFICE 6, ARLINGTON STREET, ST.JAMES'S, S.W.1. TELEPHONE:- REGENT 0957-8. TELEGRAMS: BRISTAIRCO, PICCY, LONDON.… | ||
| img102 | Letter from the RAF comparing the specifications of Belgian and American .5' Browning machine guns. | ||
| View original record | DO/RSTHC/49. Headquarters, No. 1 Air Armament School, Royal Air Force, MANBY, Nr. Louth, Lincs. 16th October, 1940. Dear Lappin, When I came over and visited you the other week I had a discussion with… | ||
| img103 | 40mm Gun installation in the 'Beaufighter' aircraft. | ||
| View original record | To Ve. from Rm. 40 mm. Gun - "Beaufighter". ------------------------ If the maximum of value is to be obtained from the work the B.U.S.M. are doing, they should be given the limi- tations imposed by… | ||
| img104 | Letter to L.G. Frise of Bristol Aeroplane Co. Ltd. regarding the Chatwood Safe Container and a 40 mm. gun. | ||
| View original record | Rm.9/ML. 20.10.40. L.G.Frise,Esq., Bristol Aeroplane Co.Ltd., Filton House, BRISTOL. Dear Frise, Thank you for your letter of the 16th. October and for the information about the Chatwood Safe… | ||
| img105 | Letter to the Bristol Aircraft Co. regarding the installation of a 40 m.m. gun in a Beaufighter aircraft. | ||
| View original record | c. to Rm. EV.10/JH. 9th. October, 1940. The Bristol Aircraft Co.Ltd., Filton, Bristol. For the attention of Mr. Friese - Chief of Air frame Design. Dear Sirs, re 40 m.m. Gun in Beaufighter. Under the… | ||
| img106 | Letter regarding the limits for a gun loader's position and the installation of automatic feeds. | ||
| View original record | Cont'd. c. The limit we may extend the shape of the loading trap on the side 'P'. d. The rearward limit at which the loader may sit at 'R'. We presume he may sit on the floor with a loading trap at… | ||
| img107 | Covering letter attaching a response from the Chief Inspector of Small Arms with serial numbers for 50 .5-inch Machine Guns. | ||
| View original record | SECRET. 5 D/HP/YS/JR.31.10.40. Re: I.T.P. B.124506/40 - .5-in Machine Guns. We attach a copy of a letter received from the Chief Inspector of Small Arms, dated the 28th instant, giving the Serial… | ||
| img108 | Instruction from the Chief Inspector of Small Arms detailing the serial numbers for a contract of 50 .5-in machine guns. | ||
| View original record | COPY. A.8574. From The Chief Inspector of Small Arms, Baas Hill House, Broxbourne, Herts. Messrs. Rolls-Royce Ltd., Derby. 28th October, 1940. Instruction to Proceed No. B.124506/40 .5-in Machine… | ||
| img109 | Letter from Bristol Aeroplane Company discussing the installation and operation of aircraft guns and cannons. | ||
| View original record | BUSH HOUSE, ALDWYCH, W.C.2. TELEPHONE: TEMPLE BAR 7193. TELEGRAMS: BRISTAIRCO, BUSH, LONDON. "Bristol" TELEGRAMS: AVIATION, BRISTOL. CODES - WESTERN UNION, BENTLEY'S & A.B.C. THE BRISTOL AEROPLANE… | ||
| img110 | Letter discussing gun installation, ejection, and feed mechanisms for aircraft cannons. | ||
| View original record | THE BRISTOL AEROPLANE COMPANY LTD. W. A. Robotham Esq. 31st October, 1940. - 2 - installations, by a cap over the end of the barrel which is blown off by the first shot. This does not prevent the gun… | ||
| img111 | Notes on the alignment and range of adjustment for fixed aircraft guns. | ||
| View original record | COPY. S E C R E T S.B.853. January, 1940. NOTES ON ALIGNMENT AND RANGE OF ADJUSTMENT OF GUNS. PART I. FIXED GUNS. 1. In aircraft equipped with fixed guns firing nominally in the line of flight, the… | ||
| img112 | The adjustment and clearance requirements for fixed aircraft gun mountings. | ||
| View original record | 2. 5. In the case of aircraft equipped with two or more fixed guns, the mountings are to be provided with means of adjustment of the gun alignment. The dispersion requirement of para. 1(b) is that… | ||
| img113 | Specifications for the adjustment range of gun mountings in two and four-gun turrets. | ||
| View original record | S E C R E T PART II - TURRET GUNS. January, 1940. 1. In turrets equipped with two guns, the gun mountings must be provided with means of adjustment in both horizontal and vertical planes, so that the… | ||
| img114 | Cover letter forwarding a copy of a letter from The Bristol Aeroplane Co. Ltd. | ||
| View original record | GUN To kp. from Hs. Copy to Ev. Ve. Rm.1/ST/6.11.40. Rm. has requested me to send you a copy of a letter of 31st October, 1940, which he received from The Bristol Aeroplane Co. Ltd of Bristol,… | ||
| img115 | The issue and filing of drawings for the 40 m.m. Gun installation in a Beaufighter aircraft. | ||
| View original record | To Rm. from Ev. c.c to Rm/HH. ~~c.c to Rm/Gms~~ re 40 m.m. Gun in Beaufighter. We attach to Rm/HH's. copy of this memo. the following drawings for issue and filing only. QPL.150 1/4 scale of 40 m/m.… | ||
| img116 | Correspondence regarding the installation of a 40 m/m gun in the Beaufighter aircraft and a potential ground-strafing variant. | ||
| View original record | To Rm. from Ev. re 40 m/m Gun in Beaufighter. We have received the attached letter from Mr.L.S.Frise in reply to our Ev.10/JH.29.10.40. enclosing a print of QPL.154 the 1/4 scale layout of the 40 m/m… | ||
| img117 | Letter from Bristol Aeroplane Company discussing the installation of a 40mm gun on a Beaufighter aircraft. | ||
| View original record | ALL COMMUNICATIONS SHOULD BE ADDRESSED TO THE COMPANY AND NOT TO INDIVIDUALS. LONDON OFFICE 6, ARLINGTON STREET, ST. JAMES'S, S.W.1. TELEPHONE:- REGENT 0957-8. TELEGRAMS: BRISTAIRCO, PICCY, LONDON.… | ||
| img118 | Secret memo detailing drawings for .303 Browning Guns in Spitfire & Hurricane wings. | ||
| View original record | SECRET. To Rm. from Ev. c. to Ve. c. to Rm/HH re .303 Browning Guns in Spitfire & Hurricane Wings. Some while ago we had made full scale drawings of the gun bays, the gun mountings and the ammunition… | ||
| img119 | Cover note regarding the details and position of various experimental guns. | ||
| View original record | To Sg. Hs. Va. A.D. Rm.S/sh.27.11.40. A-PIECE & EXPERIMENTAL GUNS. Herewith exact details of the position of the various experimental guns by numbers, which should be attached to Rm.S/sh.27.11.40. RM. | ||
| img120 | Status report on the position of various experimental guns. | ||
| View original record | To Sg. Hs. Vs. M.S. Ve/Mr. R/S/Cmr. Rh. Jms.1/T. 20.11.40. POSITION OF EXPERIMENTAL GUNS BY NUMBERS. ------------------------------------ 40 MM. GUNS. No. 11239 - Assembled as a Br. single shot for… | ||
| img121 | Letter from Bristol Aeroplane Company regarding the installation of a 40mm gun in a Beaufighter aircraft. | ||
| View original record | ALL COMMUNICATIONS SHOULD BE ADDRESSED TO THE COMPANY AND NOT TO INDIVIDUALS. LONDON OFFICE 6, ARLINGTON STREET, ST. JAMES'S, S.W.1. TELEPHONE:- REGENT 0957-8. TELEGRAMS: BRISTAIRCO, PICCY, LONDON.… | ||
| img122 | Letter detailing modifications for a gun and magazine installation. | ||
| View original record | W. A. Robotham Esq. 2nd December, 1940. - 2 - By fitting a suitable lining it should be possible to collect the carrier plates in the keel. The point at which the plates enter the keel appears, from… | ||
| img123 | Letter to D.L. Frise of Bristol Aeroplane Co. confirming travel arrangements, mentioning the 'Black-out'. | ||
| View original record | Rm.6/ML. 4.12.40. D.L.Frise,Esq., Bristol Aeroplane Co., Filton House, BRISTOL. Dear Frise, Confirming our telephone conversation. The days being short, I hope to come down to Bristol on Friday… | ||
| img124 | Message postponing a visit to the Bristol Aeroplane Company. | ||
| View original record | 5.12.40. FRISE. BRISTOL AEROPLANE COMPANY, FILTON HOUSE. BRISTOL. POSTPONING VISIT UNTIL FURTHER INFORMATION AVAILABLE. ROBOTHAM. ROYCAR. | ||
| img125 | Illegible and heavily degraded document. | ||
| View original record | ", | ||
| img126 | Letter from Bristol Aeroplane Company regarding the installation of a 40mm gun in a Beaufighter. | ||
| View original record | COPY OF LETTER FROM :- BRISTOL AEROPLANE COMPANY, LIMITED., FILTON HOUSE, BRISTOL. Tech/D/F/40/201. W.A.Robotham,Esq., Rolls Royce Ltd., DERBY. Dear Robotham, 40 mm. gun in Beaufighter. We have… | ||
| img127 | Outlining required modifications to accommodate a B.U.S.M. type magazine and gun mounting. | ||
| View original record | - 2 - we would point out that the keel increases in width from 21" at former 69 to 23" at former 61 1/2 and that the projection on the gun body at this point appears to foul. The floor bearers at the… | ||
| img128 | Letter to L.L. Frise of Bristol Aeroplane Co. Ltd. regarding the review of installation drawings. | ||
| View original record | Rm.2/ML. L.L.Frise,Esq., Bristol Aeroplane Co.Ltd., Filton House, BRISTOL. 7.12.40. Dear Frise, Thank you for your letter of December 2nd. Mr. Evernden will now review his installation drawings and… | ||
| img129 | Letter to Bristol Aeroplane Co. Ltd. regarding the review of installation drawings. | ||
| View original record | Rm.2/ML. 7.12.40. D.L.Frise,Esq., Bristol Aeroplane Co.Ltd., Filton House, BRISTOL. Dear Frise, Thank you for your letter of December 2nd. Mr. Evernden will now review his installation drawings and… | ||
| img130 | Mounting of a 40 mm gun in a Beaufighter aircraft, including design modifications. | ||
| View original record | S E C R E T. To Rm. from Ev. Copy to Ve. Rm/HH. Ev/ID. Ev.10/ET.20.12.40. 40 mm. GUN IN BEAUFIGHTER. ------------------------- As requested, we are again making a powerful effort to get two 40 mm.… | ||
| img131 | Notes from a visit by Air Commodore Huskinson concerning the development and policy of .5' and 40mm guns. | ||
| View original record | Sg. and Hs. from Rm. SECRET. COPY. c. Ve. c. Ve/NP. Rm.4/ML.15.1.41. NOTES ON VISIT OF AIR COMMODORE HUSKINSON. 14.1.41. The following is a brief summary of the most important points raised during the… | ||
| img132 | The development and installation of 40 mm and .5' guns for aircraft. | ||
| View original record | - 2 - Cont'd. 3. 40 mm. GUN. (a) Installation. Air Commodore Huskinson expressed the opinion that the 40 mm., having reached such an advanced stage of development, should immediately be installed in a… | ||
| img133 | Meeting notes discussing the potential of 15 mm BESA ammunition and the development of a gas-operated gun. | ||
| View original record | - 3 - Cont'd. Rm.4/ML.15.1.41. 5. 15 mm. BESA. Air Commodore Huskinson suggested that the 15 mm. BESA ammunition, which was at present being used in tanks, might give the additional penetration… | ||
| img134 | Forwarding an original letter from Air Commodore Huskinson for information and action. | ||
| View original record | Ve. C.Hs. B.Hs. Lp.7/JL. 29.1.41. Please note the attached original letter from Air Commodore Huskinson which I have acknowledged with thanks and informed him that it has been passed to you for your… | ||
| img135 | Letter from the Ministry of Aircraft Production concerning the testing of aircraft armaments and ammunition supply. | ||
| View original record | COPY. SECRT. MINISTRY OF AIRCRAFT PRODUCTION, D. ARM. D. MILLBANK, S.W.1. 27th January, 1941. Dear Lappin, Please forgive me for not writing to you earlier, but I have been laid up with 'flu, and… | ||
| img136 | Letter from the Ministry of Aircraft Production regarding the arrangements for testing a 40mm gun. | ||
| View original record | Copies to:- Hs. Rm. MINISTRY OF AIRCRAFT PRODUCTION, D. Arm. D., MILLBANK, S.W.1. 31st January, 1941. Dear Hives, I have just had a letter from Lapin to say that he is very pleased we are going to… | ||
| img137 | Letter from the Ministry of Aircraft Production regarding the installation of a gun at Hucknall and the associated ammunition supply. | ||
| View original record | Copies to:- Rm. Hs. SECRET. S.B.15142. MINISTRY OF AIRCRAFT PRODUCTION, D. ARM. D., MILLBANK, S.W.1. 5th February, 1941. Dear Viale, Many thanks for your letter of the 4th February. I have told… | ||
| img138 | Requesting arrangements with Hucknall, Bristol and Vickers Armstrongs to discuss proposals for mounting a gun. | ||
| View original record | Ev/JD. Remind me to send these drawings To. Rm. from Ve. c. to Gg. c. to Hs. c. to Fw. Ve.10/CB.7.2.41. Would you please make the necessary arrangements with Hucknall, Bristol and Vickers Armstrongs.… | ||
| img139 | Letter from the Ministry of Aircraft Production regarding the trials of 40mm guns in a Beaufighter aircraft. | ||
| View original record | Copies to :- Sg. Hs. (Ra) Ev. MINISTRY OF AIRCRAFT PRODUCTION, R.D. ARM.1., MILLBANK, S.E.1. 3rd February, 1941. S.B.15142/R.D.Arm.1. Trials of 40 mm. Gun in Beaufighter No. R.2061. Gentlemen, I have… | ||
| img140 | Letter to Vickers Armstrong regarding the installation of a 40mm gun into turrets. | ||
| View original record | S E C R E T. Rm.8/CT. 11th February, 1941. Captain NANNINI, Messrs. Vickers Armstrong, Broadway, Westminster, S.W.1. Dear Captain Nannini, You may remember that I met you at Vickers, Weybridge, with a… | ||
| img141 | The mounting schemes for a 40mm gun in a Beaufighter aircraft. | ||
| View original record | SECRET. To Ex/ID. from Ev. c. to Rm. c. to Ve. Ev.1/JH.12.2.41. Dictated Monday 10.2.41. 40 m.m. Gun in Beaufighter. In accordance with the arrangement reached during your visit to this office today,… | ||
| img142 | Letter from Vickers-Armstrongs regarding a delayed visit to Hucknall to inspect a Beaufighter for a 40m/m test installation. | ||
| View original record | TELEGRAMS: VICARMSTRONG, SOWEST, LONDON. TELEPHONE: ABBEY 7777. Vickers-Armstrongs Limited PLEASE ADDRESS ALL REPLIES TO THE COMPANY ONLY, & QUOTE REFns AS UNDER- MTD/163. VICKERS HOUSE, BROADWAY,… | ||
| img143 | Modifications required for fitting a 40 m/m gun in a Beaufighter aircraft. | ||
| View original record | To [redacted]. from EV/JD. c. to Rn. c. [redacted] Ev/JD.1/SW.28.2.41. 40 m/m Gun in Beaufighter. In fitting the 40 m/m vertical feed automatic guns in the beaufighter, the following modifications… | ||
| img144 | Discussion and demonstration for the installation of a .5' type AB machine gun in turrets. | ||
| View original record | To Hs. from Ve. c.c. to Sg. c. to Rm. c. to HPS. Ve.2/CB.5.3.41. Wing Commander Spreckley of D. Arm. D. has asked if he could bring Mr. North of Boulton & Paul, Captain Frazer-Nash and Mr. Nannini of… | ||
| img145 | The project for the front mounting of a 40 m/m gun in a Beaufighter aircraft. | ||
| View original record | To Rm. from Ev/JD. c. to [REDACTED] c. to [REDACTED] c. to [REDACTED] c. to Hsy/L.Durns. Ev/JD.8/SW.10.3.41. 5 40 m/m Gun in Beaufighter. We attach to Rm/HH's copy the original of QPL.173 - Project… | ||
| img146 | Project for rear mounting a 40 m/m gun in a Bristol Beaufighter aircraft. | ||
| View original record | To Rm. from Ev/JD. c. [REDACTED] c. [REDACTED] c. [REDACTED] c. [REDACTED] Ev/JD.3/SW.12.3.41. 40 m/m Gun in Beaufighter. We attach to Rm/HH's copy the original of QPL.175 - Project for Rear Mounting… | ||
| img147 | The installation scheme for a 40 m/m gun in a Bristol Beaufighter aircraft. | ||
| View original record | To Rm. from Ev/JD. c. [Redacted text] c. [Redacted text] c. [Redacted text] c. Hs/J.Burns. Ev/JD.6/SW.16.3.41. 40 m/m Gun in Beaufighter. We attach to Rm/HH's copy, the original of QPL.176 -… | ||
| img148 | Letter regarding the installation drawings for a 40mm gun in a Beaufighter aircraft. | ||
| View original record | Sg. Ha. Ve. Rm. Rhb. G/Kh. B/L. B/KP. KPS/GEF. Dor/WK. Ha/Arms.1/VI. 17th. March 1941. The Director of Armament Development, Ministry of Aircraft Production, Millbank, London.S.W.1. For the attention… | ||
| img149 | Letter to Bristol Aircraft Co. regarding the scheme drawing for a 40 m/m gun installation in a Beaufighter aircraft. | ||
| View original record | M.S./P.H. 20.3.41. F.L.Frise, Esq., Bristol Aircraft Co., Filton House, BRISTOL. Dear Frise, I am sending you the scheme drawing of an installation of the 40 m/m. gun in the Beaufighter. In case you… | ||
| img150 | Confidential letter from Vickers-Armstrongs regarding the installation of a 40mm gun in a Beaufighter aircraft. | ||
| View original record | Copies to:- Rm. Lov/Brns. Ev. Ev/JD. VICKERS ARMSTRONGS LIMITED. Vickers House, Broadway, Westminster, LONDON, S.W.1. MTD/163. 20th March, 1941. CONFIDENTIAL. Messrs. Rolls-Royce Limited, D E R B Y.… | ||
| img151 | Letter from the Aircraft Gun Mounting Establishment regarding drawings, a gun mounting model, and the arrival of a Beaufighter aircraft. | ||
| View original record | Copies to:- Sg. Hs. Rm. COPY. Aircraft Gun Mounting Establishment, R.A.F. Station, DUXFORD, Cambs. 25th March, 1941. Reference :- AGME/209/6/Arm. Dear Mr. Viale, Many thanks for your letter of March… | ||
| img152 | The installation of a .5 Bore Machine Gun Type A.A. and ammunition system in a Spitfire. | ||
| View original record | To EV/JD. c. to Rm. SECRET. Ev.2/JH.27.3.41. re .5 Bore Machine Gun Type A.A. in Spitfire. We have received from Ve/NP. the attached print of QS.232 which shows their method of attaching the swin neck… | ||
| img153 | Installation drawings for a 40mm gun on a Beaufighter aircraft. | ||
| View original record | O/NOTE Ve. From Rm. G. Ev. Derby copy to: I sent Frise a copy of the installation drawings for the 40 mm. in the Beaufighter, and asked him to let us have any comments. I attach a copy of the reply I… | ||
| img154 | Letter from Bristol Aeroplane Company regarding the installation of 40mm and 20mm guns in the Beaufighter aircraft. | ||
| View original record | TELEGRAMS: BRISTAIRCO, BUSH, LONDON. CODES: WESTERN UNION. BENTLEY'S & A.B.C. THE BRISTOL AEROPLANE COMPANY LTD FILTON HOUSE, BRISTOL, ENG. SIR G. STANLEY WHITE, BT (MANAGING DIRECTOR.) Your Ref. Our… | ||
| img155 | Letter to Bristol Stamping Co. Ltd. explaining the inability to send a specialist and arranging for a representative to visit instead. | ||
| View original record | cs. Ev. Ve. ARH./E.B. 13.3.15 MESSRS. Bristol Stamping Co. Ltd., 11 Queen Street, BRISTOL. Dear Sirs, With reference to your letter of the 12th. inst., we regret we are unable to do anything with one… | ||
| img156 | Installation of a .500 bore Type A.A. gun in a Spitfire wing. | ||
| View original record | To Rm. from Ev. c. to Ve. c. to HPS. c. to Rm/HH. SECRET. Ev.6/JH.31.3.41. .500 bore Type A.A. Gun in Spitfire Wing. On CPL.182 (original attached to Rm/HH's copy of this memo.) we shew the fore and… | ||
| img157 | Letter to Vickers Supermarine Ltd. requesting design prints for a Spitfire wing ammunition box and chute. | ||
| View original record | [ c. to Rm. ] Ev.5/JH. 4th. April, 1941. Vickers Supermarine Ltd., Hursley Park, Winchester. For the attention of J. Smith Esq. Dear Sirs, When last we called on you (Messrs. Robotham and Evernden) we… | ||
| img158 | The proof and firing trials for a 40 m/m gun for a Beaufighter installation. | ||
| View original record | To. Mr/WV. from HPS. c.c. Mr. Hives Rm. ROLLS ROYCE 40 m/m. GUN FOR BEAUFIGHTER INSTALLATION. Providing you have now finished with modifications and alterations, there is every chance of this gun… | ||
| img159 | Finalizing a 40 mm. gun installation and coordinating a visit to Hucknall. | ||
| View original record | Vc. from RM. C. .V. c. RV/JD. A.L.C./L.21.4.41. He spoke to Price of Bristol's on the telephone today regarding sending someone up to Derby to finalise the 40 mm. gun installation. He agreed to send… | ||
| img160 | Letter to Doctor Helmore regarding the finalisation of a 40 mm gun installation in a night fighter. | ||
| View original record | Rm.4/ML. 21.4.41. Doctor Helmore, Ministry of Aircraft Production, Thames House, Millbank, LONDON. Dear Helmore, I have now managed to arrange that I shall be at the Works for certain on Wednesday and… | ||
| img161 | Letter to L.C. Frise of Bristol Aeroplane Co. Ltd. confirming a meeting. | ||
| View original record | Hm.11/M. 21.3.41. L.C.Frise, Esq., Bristol Aeroplane Co.Ltd., Filton House, BRISTOL. Dear Frise, Confirming our telephone conversation, we are meeting you at the works at 12 o'clock noon on Wednesday… | ||
| img162 | Letter to the Ministry of Aircraft Production regarding gun trials in a Spitfire wing and requesting a turret for further tests. | ||
| View original record | Copy to Rm. Derby xxxxxxxxxx 45406. 21st April, 1941. Ve/NP.3/CB. D. Arm. D., Ministry of Aircraft Production, Millbank, LONDON, S.W.1. For the attention of Wing Commander Spreckley. Dear Wing… | ||
| img163 | Specification and allocation of 25 guns for the Air Ministry, considering different potential uses. | ||
| View original record | To Rm. from Ve. Ve.1/CB.21.4.41. 25 GUNS FOR THE AIR MINISTRY. In reply to your Rm.15/ML.18.4.41, it is possible to give a specification for the parts common to the above guns and the BD Naval guns on… | ||
| img164 | Follow-up letter to Vickers Supermarine Ltd. concerning an ammo box for a 1/2' Machine Gun. | ||
| View original record | [c. to Rm.] Ev.S/JH. SECRET. Vickers Supermarine Ltd., Hursley Park, Winchester. For the attention of J. Smith Esq. Dear Sirs We attach herewith a copy of a letter which we wrote to you on the 4th.… | ||
| img165 | Letter to Vickers-Armstrongs Ltd. seeking clarification on drawings for a Spitfire's 1/2' gun ammo box. | ||
| View original record | [ C. TO Rm. ] Ev/JD. Ve. Ev.10/JH. 24th. April, 1941. Vickers-Armstrongs Ltd., Supermarine Works, Hursley Park, Winchester. Hants. For the attention of J. Smith Esq. Dear Sirs, We regret that… | ||
| img166 | Letter providing the contact address and telephone number for H.I.F. Evernden, Chief of Design for the Gun Installation Section. | ||
| View original record | save time if all communications were addressed to him as follows :- H.I.F.Evernden, Park Leys, Duffield. Nr. Derby. 'phone No. Duffield. 2365. Yours faithfully, H.I.F.Evernden, Chief of Design, Gun… | ||
| img167 | Secret memo discussing the ammunition box for the ½' Browning Gun in the Spitfire Wing. | ||
| View original record | To EV. / JD. c. to Rm. SECRET. Ev.2/JH.25.4.41. ½" Guns in Spitfire. We have now received the attached drawings of the ammo. box for the ½" Browning Gun in the Spitfire Wing. From a letter, a copy of… | ||
| img168 | Modifications for installing a 40mm gun in a Beaufighter aircraft. | ||
| View original record | SECRET Ims. from Ev/JD. c.c. Ev. O. Ve. Ev/JD.5/M.28.4.41. INSTALLATION OF 40 mm. GUN IN BEAUFIGHTER. We confirm that during the visit of Mr. Green (Bristol Aeroplane Co.,) the following points were… | ||
| img169 | Decisions on gun mounting modifications, ejection chute, and hopper design. | ||
| View original record | - 2 - Cont'd. 2. (a) Flying and trimming cables would not be altered. (b) A simplified ejection chute is possible. (c) It makes it possible to have a double hopper for shells. In view of the… | ||
| img170 | Confirming the loan of original tracings for a 40 mm gun fitted in a 'Beaufighter' aircraft. | ||
| View original record | To Vs./Fawlkes from Rm/JD. Copy to Rm/HH. GUN Ev/JD.11/EF.29.4.41. 40 mm. GUN IN "BEAUFIGHTER" ------------------------- We herewith confirm that, on April 28th 1941, we loaned your Department the… | ||
| img171 | Letter from The Bristol Aeroplane Co. enclosing prints and amended drawings for the Beaufighter aircraft. | ||
| View original record | Rm. Tv. Ev/JD. COPY. THE BRISTOL AEROPLANE CO., LTD., FILTON HOUSE, BRISTOL. Ve/NP.5/CB. AIRCRAFT/EDC/F/182. 1st May, 1941. Messrs. Rolls-Royce Ltd., Derby. For the attention of Mr. Viale. Dear Sirs,… | ||
| img172 | Letter to the Bristol Aeroplane Co. regarding pneumatic connections on the Beaufighter aircraft and requesting details for a Banjo Connection. | ||
| View original record | COPY. Ve/HGF.4/CB. 3rd May, 1941. Your Ref. AIRCRAFT/EDC/F/182. The Bristol Aeroplane Co., Ltd., Filton House, BRISTOL. For the attention of Mr. Frise. Dear Sirs, We thank you for your letter of the… | ||
| img173 | Letter to The Bristol Aeroplane Co. regarding the installation of a 40 mm gun and associated blueprints. | ||
| View original record | COPY. Ve/HGF.1/CB. 8th May, 1941. The Bristol Aeroplane Co., Ltd., Filton House, BRISTOL. For the attention of Mr. Frise. 40 mm. Gun Installation. Dear Sirs, We are sending you herewith blueprint of… | ||
| img174 | Letter to The Bristol Aeroplane Co. Ltd. enclosing drawings for a front mounting and a keel plate opening. | ||
| View original record | COPY. Ve/HGF.1/CR. 9th May, 1941. The Bristol Aeroplane Co., Ltd., Filton House, BRISTOL. For the attention of Mr. Frise. Dear Sirs, Further to our letter of yesterday, we find that we omitted to send… | ||
| img175 | Letter from Bristol Aeroplane Co. concerning the installation of a 40 mm gun on a Beaufighter aircraft. | ||
| View original record | COPY. THE BRISTOL AEROPLANE CO., LTD., FILTON HOUSE, BRISTOL. Your Ref. Ve/HGF.1/CR. Our Ref. AIRCRAFT/EDO/F/197. 12th May, 1941. Messrs. Rolls-Royce Ltd., Derby. For the attention of Mr. Viale. Dear… | ||
| img176 | The arrangement and specifications of blast tubes for a 40mm gun fitted to a Beaufighter aircraft. | ||
| View original record | To Rm. from Ev/JD. c. [blacked out] c. [blacked out] c. [blacked out] Ev/JD.2/SW.9.5.41. 40 m/m Gun in Beaufighter. We attach to Rm/HH's copy the original of :- QPL.185 Arrgt. of Blast Tubes (40 m/m… | ||
| img177 | Typed memo regarding modifying a Beaufighter aircraft installation. | ||
| View original record | PRIDE AVIATION BRISTOL 13.5.41 WE HAVE STILL RECEIVED NO PARTICULARS OF YOUR RECOMMENDATIONS FOR MODIFYING BEAUFIGHTER KMSL TO SUIT OUR INSTALLATION. ROBOTHAM ROYCAR | ||
| img178 | Diagrams for the installation of a 40 m/m gun in a Beaufighter aircraft. | ||
| View original record | To Rm. from Ev/JD. c.c. to Ev. c.c. to Ve. c.c. to Rm/HH. Ev/JD.5/SW.13.5.41. 40 m/m. Gun in Beaufighter. We attach to Rm/HH's copy the originals of :- QPL.187 Section thro' Beaufighter Fuselage at… | ||
| img179 | Typed communication to Frise Aviation in Bristol regarding a machine modification at Hucknall. | ||
| View original record | FRISE AVIATION BRISTOL WE ARE MODIFYING A MACHINE AT HUCKNALL STOP PLEASE SEND NECESSARY DRAWINGS FOR APERTURE TO BE CUT IN HULL ALSO TWO STANDARD PANELS AS DISCUSSED WITH GREEN | ||
| img180 | Short instructional telegram message with connected words. | ||
| View original record | WHICH WE WILL MODIFY STOP PLEASE TREAT THIS MATTER AS VERY URGENT ROBOTHAM ROYCAR | ||
| img181 | The revised installation of a 40 m/m gun in a Beaufighter aircraft. | ||
| View original record | To Rm. from Ev/JD. c. [REDACTED] c. [REDACTED] c. [REDACTED] Ev/JD.2/SW.13.5.41. 40 m/m Gun in Beaufighter. We attach to Rm/HH's copy the original of :- QPL.186 Revised Installation of 40 m/m Gun in… | ||
| img182 | Part requirements for mounting a Type A.A. Gun in a Spitfire wing for rig and flight tests. | ||
| View original record | [Redacted] from Rm/HH. c. to Rm. c. [Redacted] c. [Redacted] c. [Redacted]/SP. Rm/HH.1/SW.13.5.41. Type A.A. Gun in Spitfire Wing QPL.182. Further to our memo reference Rm/HH.4/SW.3.5.41., issuing… | ||
| img183 | Installation schemes for a 40 m/m gun in a Beaufighter aircraft, including a list of blueprints. | ||
| View original record | To Rm. from Ev/JD. c. [Redacted] c. [Redacted] c. [Redacted] Ev/JD.6/SW.13.5.41. 40 m/m Gun in Beaufighter. Please find attached blueprints of the following schemes :- QPL.185 Arrgt. of Blast Tubes -… | ||
| img184 | The functioning and endurance trials of a 40mm Aircraft Cannon. | ||
| View original record | Copies to :- Sg. Hs. Rm. HPS. Lov/Brns. From Ve. Experimental Establishment, Pendine, South Wales. 17th May, 1941. A. G. T. B., Ministry of Aircraft Production, Thames House, Millbank, LONDON, S.W.1.… | ||
| img185 | The results and remarks from a firing trial, including accuracy, wear, and performance issues. | ||
| View original record | -2- 4. Results. The full results are attached as Appendix B and C, a part of which is summarised as follows :- (a) Accuracy at 300 yards. Horizontal Vertical Feet. 7 single shot diagrams 1.00 0.60 7… | ||
| img186 | Conclusions and recommendations regarding a gun's malfunctioning and necessary modifications. | ||
| View original record | -3- The stoppage that caused the body to be fractured in two places can in no way be attributed to the normal stress imposed by the functioning of the gun. This was caused by the next round being… | ||
| img187 | The urgent modification of a Beaufighter hull at Hucknall to fit a 40mm gun. | ||
| View original record | To Hs from Rm. Rm.11/GT.19.5.41. 40 mm. GUN IN BEAUFIGHTER IN HUCKNALL --------------------------------- Dorey still has no information to enable him to modify the hull of the Beaufighter at Hucknall.… | ||
| img188 | Drawings for the installation of a 40 mm gun in a Beaufighter aircraft. | ||
| View original record | To Dor. Hucknall, from Rm. Rm.10/ST.20.5.41. I am sending you herewith the drawings of the installation of the 40 mm. gun in the Beaufighter. All the mounting parts necessary for this installation are… | ||
| img189 | The design and installation of .500 guns and ammunition boxes in Spitfire wings. | ||
| View original record | To Rm. from Ev/JD. c.c. [redacted] c.c. [redacted] c.c. [redacted] EV/JD.6/SW.20.5.41. .500 Guns in Spitfire. We attach to Rm/HH's copy the originals of :- QPL.189 Ammunition Box and Feed Neck .500… | ||
| img190 | The trials of the 40 mm Aircraft Gun No. 11239 at Pendine. | ||
| View original record | Re-Sg. from Ve. S. to Rm. HRO; Ve.7/CB.20.5.41. TRIALS OF 40 mm. AIRCRAFT GUN No. 11239 AT PENDINE ON THE 5th to 15th May. The trial, which was called for by the Director of Armament Development, was… | ||
| img191 | Gun trials detailing performance, stoppages, and specific test incidents. | ||
| View original record | -2- Ve.7/CB.20.5.41. 80° Elevation - atmospheric. 23 rounds. 80° Depression - atmospheric. 62 " 80° Elevation - -10°F. 15 " 80° Depression - -10°F. 9 " Sand test. 9 " To test Body and Sear. 17 rounds.… | ||
| img192 | Trial report on a cracked Cradle at the Recoil Bridge, proposing alterations to the compression ratio. | ||
| View original record | -3- Ve.7/CB.20.5.41. At the conclusion of the trial, the Cradle was found to be cracked at the Recoil Bridge, probably due to the Recoil Gear hitting back on this part at 80° elevation when filled… | ||
| img193 | Letter from Bristol Aeroplane Company regarding the installation of a 40mm gun in a Beaufighter aircraft. | ||
| View original record | LONDON OFFICE 6, ARLINGTON STREET, ST.JAMES'S, S.W.1. TELEPHONE:- REGENT 0957-8. TELEGRAMS: BRISTAIRCO, PICCY, LONDON. TELEPHONE:- BRISTOL 48051 TELEGRAMS:- AVIATION, BRISTOL CODES:- WESTERN UNION,… | ||
| img194 | Letter to The Bristol Aeroplane Co., Ltd. regarding drawings, required panels and an order. | ||
| View original record | FILE Gun Rm.S/SW. 25th May, 1941. L.G. Frise, Esq., The Bristol Aeroplane Co., Ltd., Filton House, BRISTOL. Dear Frise, Thank you for the drawings and your letter of May 23rd, 1941. We hope that you… | ||
| img195 | Letter detailing drawings for modifications to the Beaufighter hull to install a 40 M/m weapon. | ||
| View original record | To Mr. from Rm. Gun FILE Rm.6/SW.25.5.41. I am sending you herewith drawings shewing the modifications necessary to the Beaufighter hull to enable the 40 M/m to be installed. I believe this completes… | ||
| img196 | Letter from The Bristol Aeroplane Co., Ltd. concerning drawings for the installation of a 40 m/m gun in a Beaufighter aircraft. | ||
| View original record | COPY. The Bristol Aeroplane Co., Ltd., Filton House, BRISTOL. AIRCRAFT/EDO/F/210. 23rd May, 1941. Messrs. Rolls-Royce, Ltd., DERBY. For the attention of W.A. Robotham, Esq. Dear Sirs, Installation of… | ||
| img197 | Non-arrival of drawings, sending second copies to Hucknall and arranging an order for panels. | ||
| View original record | To Ve. from Rm. FILE Gun Rm.7/SW.25.5.41. As I understand that the drawings sent to you on Saturday had not arrived on Sunday, I have sent the second copies over to Hucknall. I have also asked Dorey… | ||
| img198 | Bristol drawings for modifications to the Beaufighter hull to install a 40 m.m. unit. | ||
| View original record | Dor/Hks.4/FEB. 27.5.41. To Hm. Ref. Hm.6/SW. 25.5.41. We have received the Bristol drawings showing modifications necessary to the Beaufighter hull, to enable the Rolls-Royce 40 m.m. to be installed.… | ||
| img199 | Instructions for the installation of Rolls-Royce 40mm cannon guns, detailing fuselage modifications and replacement of existing guns. | ||
| View original record | -8- Installation of Rolls-Royce Cannon Gun. With regard to the installation of the guns, and the fact that the main planes with their gun mountings will be supplied complete for the completion of the… | ||
| img200 | Fitting blast tubes and awaiting further drawings from Bristol's for gun mounting modifications. | ||
| View original record | -2- It is understood that it will probably be necessary for us to fit the blast tubes to these panels, here. A further drawing is expected from Bristol's showing the holes in the beam to take the rear… | ||
| img201 | Letter from The Bristol Aeroplane Co. Ltd. concerning the 40mm gun installation in a Beaufighter aircraft. | ||
| View original record | Copies to :- Rm. Dor. from Ve. THE BRISTOL AEROPLANE CO., LTD., WILTON HOUSE, BRISTOL. 27th May, 1941. Ref. AIRCRAFT/EDO/F/213 Messrs. Rolls-Royce Ltd., Derby. For the attention of Mr. S.M. Viale.… | ||
| img202 | Letter to the Bristol Aeroplane Co. regarding alterations for a 40mm gun installation in a Beaufighter aircraft. | ||
| View original record | COPY. 28th May, 1941. Ve/NP.5/CB. The Bristol Aeroplane Co., Ltd., Filton House, BRISTOL. For the attention of Mr. Green. Installation of 40 mm. Rolls-Royce Gun in Beaufighter. Dear Sirs, Further to… | ||
| img203 | Letter from the Ministry of Aircraft Production regarding the modification and trials of left-hand and right-hand 40mm guns. | ||
| View original record | MINISTRY OF AIRCRAFT PRODUCTION, A.G.T.B., MILLBANK, S.W.1. Copies to :- Hs. Rm from Ve. Dear Mr. Viale, Rolls-Royce 40 mm. Gun. Thank you for your letter of the 28th ultimo in regard to the above… | ||
| img204 | Letter to the Ministry of Aircraft Production regarding the production of 40 mm guns. | ||
| View original record | Copy to Rm. 11th June, 1941. Ve/NP.1/CB. D. Arm. D., Ministry of Aircraft Production, Millbank, LONDON, S.W.1. For the attention of Wing Commander Heard. Production Facilities - R.R. 40 mm. Guns Dear… | ||
| img205 | Telegraphic communication to Frise Aviation Bristol regarding drawings and a proposal. | ||
| View original record | FRISE AVIATION BRISTOL HAVE YOU SENT REMAINDER OF DRAWINGS PROMISED IN YOUR LETTER DO YOU AGREE VIALES PROPOSAL IN HIS LETTER OF TWENTYEIGHTH INSTANT ROBOTHAM | ||
| img206 | Distributing revised blueprints for a Stirrup Half Rear gun component in a Spitfire wing. | ||
| View original record | [Redacted] from Rm/HH. c. to Rm. c. to [illegible] Gun Rm/HH.15/SW.18.6.41. CPL.182 - A.A. Type/Gun in Spitfire Wing. Section - 1280. Please find herewith blueprints of QR.329 - Stirrup Half - Rear,… | ||
| img207 | Ministry of Aircraft Production letter ordering the cessation of development on the .5 inch machine gun. | ||
| View original record | Copies to: Hs. Rm C O P Y. Ministry of Aircraft Production, Millbank, S.W.1. 1st July, 1941. Gentlemen, .5 inch Rolls-Royce Machine Gun. I am informed by the Secretary, O.B. that you have been asking… | ||
| img208 | Letter to the Ministry of Aircraft Production clarifying the development of .5' and .55' machine guns. | ||
| View original record | C C P Y. Ve/NP.8/CB. 8th July, 1941. Group Captain Bilney, Ministry of Aircraft Production, MILLBANK, S.W.1. Dear Group Captain Bilney, In reply to your letter of the 1st July referring to the use of… | ||
| img209 | Letter discussing the trial of a .5' gas operating weapon as a .55' calibre and the associated ammunition supply issues. | ||
| View original record | c. Hs. Rm. 2044 C O P Y. D.D.Arm.D.(G). 12th July, 1941. Dear Mr. Viale, Thank you for your letter of the 8th July concerning the development of your .5" gas operating weapon, and your desire to try… | ||
| img210 | Notes on trials of 40mm and .5' guns at Pendine, including reviews of Vickers, Browning, and German Mauser models. | ||
| View original record | To Sg. Hs. Rm. HPS. Ve/NP.1/CB.5.8.41. NOTES ON TRIALS ON 40 mm. AND .5" GUNS AT PENDINE, WEEK ENDING FRIDAY AUG. 1st. 40 mm. Guns. 40 mm. Aircraft Gun No. 11239 was re-submitted for official trials.… | ||
| img211 | Confirmation of loaned blueprints for the 40 m.m. Gun in Beaufighter. | ||
| View original record | TO Dor/Lusty. c. to Em. Ev. Ve. Ev/JD.5/JH.6.8.41. 40 m.m. Gun in Beaufighter. We confirm that we loaned you the following blue prints on August 5th. 1941. to assist you in assembling the 40 m.m. gun… | ||
| img212 | Abandoned scheme for a 40mm gun ejector chute in a Beaufighter aircraft. | ||
| View original record | To Rm. from Ev/JD. C.c. to Ev. Rm/HH. SECRET. Ev/JD.12/JH.18.8.41. 40 m.m. Gun in Beaufighter. We attach to Rm/HH's. copy the original of :- QPL.184, Position of slot in keel plate for ejector chute.… | ||
| img213 | Meeting with Air Commodore Huskisson to discuss various gun types, including Browning, Mauser, and different calibre weapons. | ||
| View original record | Hs. e.Ve. S.RM. 88 Lp.5/JL. 11.9.41. GUNS. I saw D. Arm. D. Air Commodore Huskisson last week. He is definitely blind, and I do not think can remain in his present position very long. He expressed, as… | ||
| img214 | Confirming arrangements for the loan of a 15mm Mauser gun. | ||
| View original record | To Lp. from Ve. o. to Hs. c. to Rm. Ve/NP.4/CR.15.8.41. GUNS. Thank you for the interesting news in your Lp.5/JL.11.9.41. We have arranged for the loan of a 15 mm. Mauser and hope it will be at the… | ||
| img215 | Confidential memo regarding putting a matter to the A.C.A.S.T. and the installation of a 40 m.m. gun in a Hurricane. | ||
| View original record | PRIVATE & CONFIDENTIAL. To:- Rm c. Hs. GUN Lp.5/JL 26.8.41. Ref: Rm.9/ET. 21.8.41. Thank you for the above, and I am putting the matter up, as you suggest, to the A.C.A.S.T., and will let you know if… | ||
| img216 | Letter to Air Marshall A.S. Barrett regarding information of primary importance to the war effort. | ||
| View original record | R.R. 40MM. gun. 3080 9100 16th September, 1941. Rm.S/RH. Air Marshall A.S. Barrett, R.A.F., Ramslade, BRACKNELL, Nr. Wokingham. Dear Air Marshall Barrett, Thank you so much for the very pleasant… | ||
| img217 | Firing trial results for Gun 11240 on a Beaufighter aircraft at Duxford. | ||
| View original record | Phoned by Ve/NP. 29.9.41. to Rm/ET. GUN 11240 BEAUFIGHTER - DUXFORD 6.9.41. Ground firing. 8 single shots. 8 auto Speed 100 rounds per minute. 12.9.41 Flight trials. 8 single shots. 9 auto Stoppage… | ||
| img218 | Letter from the Ministry of Aircraft Production regarding the secrecy of the Hurricane II's 40mm guns. | ||
| View original record | Miss Taylor - Please ensure Ru COPY. MINISTRY OF AIRCRAFT PRODUCTION, MILLBANK, S.W.1. CRD/38/29. 5th March, 1942. Dear Hives, The Hurricane II with its 40 m/m guns is a very promising weapon and one… | ||
| img219 | The acceptance and endurance trials of 40mm Type BH aircraft guns. | ||
| View original record | SECRET. To-Ho. from Ve/NP. cc-Sq-Ldr. Rm. TPO. cc-[REDACTED] cc-Ve/VH. HPO/WHW Ve/NP.1/CB.8.5.42. Acceptance and Endurance Trials of Rolls-Royce 40 mm. Type BH Aircraft Guns. Acceptance Tests. On the… | ||
| img220 | Summary report on firing tests for a Port Gun and a Starboard Gun, detailing performance, stoppages, and servicing. | ||
| View original record | -2- Ve/WP.1/CB.8.5.42. The following is a summary of the firings, most of which were carried out in the air with the plane diving to simulate an attack on a ground target. Port Gun, 12051, R.H. Rounds… | ||
| img221 | Starboard Gun's accuracy, parts replacement, and servicing requirements. | ||
| View original record | -3- Ve/NP.1/CB.8.5.42. Starboard Gun. contd. Accuracy. - Very good. 100% group at 500 yds. - 28" dia. before; 18" dia. after. Replacements due to breakage. - 4 Extractors. 2 Firing sears. 1 Front… | ||
| img222 | Photographs of a 40mm Naval Gun converted to an automatic aircraft weapon for endurance trials. | ||
| View original record | SECRET. To Rm. from Ve/NP. Ve/NP.5/CB.19.5.42. Attached herewith are photographs of the 40 mm. Gun, type BH Mark I. This is the 40 mm. Naval Gun converted to a 9-round Automatic weapon for use in… | ||
| img223 | Cutaway view of an automatic cannon showing the feeding mechanism and breech. | ||
| View original record | ", | ||
| img224 | Photograph of a disassembled large-caliber automatic weapon or cannon, showing the barrel, breech, and firing mechanism components. | ||
| View original record | ", | ||
| img225 | Photograph showing an internal, top-down view of a firearm mechanism. | ||
| View original record | ", | ||
| img226 | The future requirements for aircraft cannon guns, comparing the ballistic merits of 6-pdr and 12-pdr variants. | ||
| View original record | Gun Files To: Ve. from Rm. c. to Sg. c. to Hs. AIRCRAFT CANNON GUNS - FUTURE REQUIREMENTS. I have now received the report from the ballistic section on the relative merits of the 6-pdr gun at 2850… | ||
| img227 | Stabilisation of a 47mm aircraft gun and the development of an automatic feed for a 6-pdr tank gun. | ||
| View original record | SECRET. To Rm. from Ve/NP. Ve/NP.5/CB.2.12.42. Since receiving your very interesting report under cover of Rm 1/h.9.11.42, the aircraft gun position has stabilised itself round the calibre of 47 mm.… | ||