Rolls-Royce Archives
| Identifier | Entry | ||
| scan0001 | Letter from a chartered patent agent acknowledging receipt of correspondence. | ||
| View original record | JB. CRUIKSHANK & FAIRWEATHER CHARTERED PATENT AGENTS 1129 WALLACE FAIRWEATHER HAROLD G.C. FAIRWEATHER DOUGLAS FAIRWEATHER TELEGRAMS PATENTS GLASGOW TELEPHONES CENTRAL 7560&7561 86 ST. VINCENT STREET… | ||
| scan0002 | Letter to Dr. J.C. Morrison regarding information on valve gear and arranging a meeting. | ||
| View original record | 1139 ? Rm3/R. 24th July, 1937. Dr. J.C. Morrison, Craigmount, Cults., ABERDEENSHIRE. Dear Dr. Morrison, Many thanks for your letter of the 9th July. We will send you the information re the valve gear… | ||
| scan0003 | Work plan for testing and modifying a Chassis S/C Unit, detailing timings, tasks, and spare parts status. | ||
| View original record | To HPS. from Rm/Ed. c. L/Psn. c. Rm/Swdl. 1129 Rm/Ed.5/AP.29.7.37 CHASSIS S/C. UNIT. Running time for three weeks, ending 24th July 1937...15 1/2 hrs. Fitting time for three weeks, ending 24th July… | ||
| scan0004 | Letter to Dr. J. Morrison confirming a convenient date for a visit and enclosing a railway voucher. | ||
| View original record | 1129 Rm3/R. 2nd August, 1937. Dr. J. Morrison, Craigmount, Cults., ABERDEENSHIRE. Dear Dr. Morrison, We find that Thursday, August 5th, will be quite convenient for your visit if you are still able to… | ||
| scan0005 | Letter to Mr. J.C. Morrison of Glasgow University regarding Bentley chassis layout prints and a humorous take on Birmingham's traffic scheme. | ||
| View original record | Rm/Ed.7/JH. 9th July, 1937. Mr. J.C. Morrison, The University, Glasgow. Dear Mr. Morrison, As we promised last Thursday I am sending herewith two prints of the Bentley chassis layout. I don't know… | ||
| scan0006 | Visit to H.R. Ricardo & Co. Ltd. to discuss the correlation of single-cylinder engine results with main engines. | ||
| View original record | By. from Rm/Ed. c. Da. Rm/Ed.7/R.12.7.37. VISIT TO H.R. RICARDO & CO. LTD., SHOREHAM. The above Works was visited by the Writer with the primary object of obtaining information regarding the… | ||
| scan0007 | Engine testing methods, focusing on single-cylinder induction systems and valve timing issues. | ||
| View original record | -2- The two methods were compared, and appeared to check up fairly well. The second method, however, is sometimes liable to an error due to surging in the pipe leading to the U-tube. This was got over… | ||
| scan0008 | Engine induction, valve timing, and exhaust back pressure effects on power output. | ||
| View original record | -3- Rm7/R.12.7.37. (2) On a main aero engine, with induction passages branching off a main passage, it is assumed that ramming will be non-existent. On a car engine, however, fitted with two… | ||
| scan0009 | Engine valve timing, noise reduction, and the introduction of Venturi valve seats with a diagram. | ||
| View original record | -4- Rm/Ed7/R.14.7.37. The phenomenon of increasing depression with increasing power was brought up, but no reason other than resonance could be found. It was suggested by Ricardo that an improvement… | ||
| scan0010 | Air flow tests examining the effects of masking and fairing on valve seats. | ||
| View original record | -5- Air flow tests have been carried out, however, and they show a considerable advantage for this type of valve and seat over any other conditions, even when the same valve was fitted to a 1 1/4"… | ||
| scan0011 | Page discussing tests on different valve forms and their effect on air and exhaust flow, with an accompanying diagram. | ||
| View original record | -6- (3) Valve Forms. Tests on valve shapes showed that a flat valve gave much better air flows on an inlet port than a tulip valve, and was further improved by fitting a domed head as shown. On the… | ||
| scan0012 | Work schedule for the Chassis S/C Unit, detailing tests, time allocation, and required spares. | ||
| View original record | TO HPS. c. to Rm/Swdl. 1129 Rm/Ed.1/JH.10.8.37. Chassis S/C Unit. Running time for fortnight ending 7th Aug. 1937. Fitting time for fortnight ending 7th Aug. 1937. Work to be done. time. Power and… | ||
| scan0013 | Letter to Dr. J.C. Morrison providing engine specifications for standard Bentley and O.H.C. Bentley models. | ||
| View original record | 1129 Rm/Ed.7/AP. August 16th 1937 Dr. J.C.Morrison, The University, GLASGOW. Dear Dr. Morrison, Many thanks for your letter. I must apologise for not answering before. I spoke to Mr.Robotham on the… | ||
| scan0014 | Page two of a letter enclosing a Bentley Production arrangement drawing for an exhaust system. | ||
| View original record | -2- With regard to the exhaust system arrangement drawings, I am enclosing our Bentley Production arrangement which, whilst not being ideal, will probably serve. The drawing is not fully dimensioned… | ||
| scan0015 | Confirming the repair and associated charge for an Amal flowmeter Mark IX. | ||
| View original record | To Roy/GEA. Rm/Ed.24/JH.17.8.37. 1129 Jets for Amal flowmeter - Mark IX. With reference to your memo. Roy/GEA.19/VR.16.8.37. The above flowmeter is to hand, and the repairs carried out are as stated.… | ||
| scan0016 | Work order detailing running times, tests to be done, and required spares for a Chassis S/C Unit. | ||
| View original record | To HPS. from Rm/Ed. c. Rm/Swdl. Rm/ED.2/AP.18.8.37 CHASSIS S/C. UNIT. Running time for week ending Sat. 14th. Aug.1937 = 11¾ hrs. Fitting " " " " " " " = 22¼ " Work to be done. Time. Power detonation… | ||
| scan0017 | Letter to Dr. J.C. Morrison acknowledging receipt of his report and recommendations for the Bentley Exhaust System. | ||
| View original record | 1129 Rml/R. 31st August, 1937. Dr. J.C. Morrison, The University, G L A S G O W. Dear Dr. Morrison, Thank you very much for the full report on your recommendations for the Bentley Exhaust System. We… | ||
| scan0018 | Letter to Coventry Climax Engines Ltd. requesting a meeting to discuss the development of a six-in-line engine. | ||
| View original record | 1129 Rm/Ed.9/MH. Messrs. Coventry Climax Engines Ltd., Friar's Road, Coventry. 2nd. September 1937. For the attention of Mr. Lee. Dear Sirs, You will no doubt, recall that some months ago we had a… | ||
| scan0019 | Letter to Dr. J.C. Morrison of Glasgow University discussing engine valve lift curves and silencers. | ||
| View original record | 1129 Rm/Ed.5/MH. Dr. J.C.Morrison, The University, Glasgow. 2nd. September 1937. Dear Dr. Morrison, Many thanks for your letter of the 31st. August, and the additional information therein. Dealing… | ||
| scan0020 | Letter to the Ethyl Export Corporation requesting more details on their research into supercharging for small displacement engines. | ||
| View original record | 1129 Rm/Ed.11/JH. 3rd. September, 1937. Ethyl Export Corporation, Thames House, Millbank. LONDON.S.W.1. For the attention of Mr.Banks. Dear Sirs, I observe in the issue of Automotive Industries for… | ||
| scan0021 | Brief acknowledgement letter addressed to Mr. F.R. Banks at the Ethyl Export Corporation. | ||
| View original record | 1129 Rm/Ed.9/JH. 7th September, 1937. Ethyl Export Corporation, Thames House, Millbank, LONDON.S.W.1. For the attention of Mr.F.R.Banks. Dear Sirs, Many thanks for yours of the 6th instant, and we are… | ||
| scan0022 | Letter to Coventry Climax Engineers Ltd. regarding the arrangement of a meeting. | ||
| View original record | 129? Rm/Ed.2/JH. 7th September, 1937. Messrs. Coventry Climax Engineers Ltd., Friars Road, Coventry. For the attention of Mr. Leonard P.Lee. Dear Sirs, Many thanks for your letter of the 4th instant.… | ||
| scan0023 | Letter to Dr. J.C. Morrison of Glasgow University explaining a delay in providing test results. | ||
| View original record | 1129. Rm/Ed.3/MH. 15th. September 1937. Dr. J.C.Morrison, The University, Glasgow. Dear Dr. Morrison, I am afraid we shall not be able to keep the promise I made you in my last letter of having some… | ||
| scan0024 | Loose valve seat in a high power head, proposing a Venturi type replacement and requesting a new seat be fitted. | ||
| View original record | To HPS. from Rm/Ed. 1129 Rm/Ed.10/MH.22.9.37. NO.3 HIGH POWER HEAD. We observe that the inserted valve seat in the alum head to Rs.315 has worked loose. We are shortly proposing to try an inserted… | ||
| scan0025 | Loose inserted valve seat on a No.3 High Power Head and a request to fit a new seat. | ||
| View original record | To HPS. from Rm/Ed. X 1129 Rm/Ed.10/MH.22.9.37. NO.3 HIGH POWER HEAD. We observe that the inserted valve seat in the alum head to Rs.315 has worked loose. We are shortly proposing to try an inserted… | ||
| scan0026 | Letter to Dr. J.C. Morrison discussing the results of tests on a new silencing system and proposing two schemes for interference pipes. | ||
| View original record | 1129. Rm/Ed.13/MH. 5th. October 1937. Dr. J.C. Morrison, The University, Glasgow. Dear Dr. Morrison, Many thanks for your letter, and I must opolgise for not answering before. We have had an initial… | ||
| scan0027 | Letter discussing an interference chamber design and the logistics of obtaining a Phantom car for testing. | ||
| View original record | -2- Rm/Bd.13/VH. (2) Interference chamber. You will see from the above what the idea is. With regard to the noise side of the question, I do not know whether your scheme takes only power into account,… | ||
| scan0028 | Scheme SCT.67 for modifying a standard Bentley head to use raised crown pistons. | ||
| View original record | 1129. To HPS. c. to Rm/Swdl. Rm/Ed.18/JH.5.10.37. Raised Crown Pistons. We send you herewith a scheme SCT.67 showing modification to the standard Bentley head to adapt it to the use of a raised crown… | ||
| scan0029 | Letter to Coventry Climax Engine Ltd. arranging a meeting to discuss an engine. | ||
| View original record | H129. Rm/Ed.18/WH. Messrs. The Coventry Climax Engine Ltd., Friar's Road, Coventry. 5th. October 1937. For the attention of Mr. Lee. Dear Sirs, Further to our letter of the 7th. September, Mr.… | ||
| scan0030 | Letter discussing the initial test results of an exhaust system, focusing on its power improvement versus noise levels. | ||
| View original record | File 1129 Mr W.A. Robotham Rolls-Royce Ltd. Derby. James Watt Engineering Laboratories, The University, Glasgow. 6th Oct. Dear Mr Robotham Mr Edwards has just written me saying you had had an initial… | ||
| scan0031 | Letter from John C. Morrison of the University of Glasgow arranging a meeting in Derby. | ||
| View original record | UNIVERSITY OF GLASGOW It happens that I have to be in London at a wedding on Sat. 16th inst. & it occurs to me that I could take a day extra & call at Derby on Friday forenoon. A discussion with you… | ||
| scan0032 | Letter to Dr. J.C. Morrison of Glasgow University regarding the quality of previously sent information and arranging a meeting. | ||
| View original record | Rm/Ed.13/IH. Dr. J.C.Morrison, The University, Glasgow. 8th. October 1937. Dear Dr. Morrison, Many thanks for your letter, and I am extremely sorry mine fell below class ticket standard. However, as… | ||
| scan0033 | Letter to Coventry Climax Engines Ltd. regarding a meeting arrangement. | ||
| View original record | 1129 Rm/Ed.15/MH. Messrs. Coventry Climax Engines Ltd., Friars Road, Coventry. 8th. October 1937. For the attention of Mr. Leonard P.Lee. Dear Sirs, Many thanks for your letter of the 7th. instant, in… | ||
| scan0034 | Program outlining the urgent jobs and modifications for a chassis single cylinder unit. | ||
| View original record | To HFS. from Rm/Ed. c. Rm. c. Da/JNK. 1129 CHASSIS SINGLE CYLINDER UNIT. In order that the shop may proceed with jobs for the above unit in their correct order of urgency, we give below a brief… | ||
| scan0035 | Outlining proposed modifications to Bentley heads, further mechanical improvements, and the status of spare parts. | ||
| View original record | -2- Rm/Ed.9/MH.11.10.37. Scheme. PD.25 This involves a modification to the standard Bentley head, involving the fitting of a venturi seat. We propose running a check curve on the standard Bentley unit… | ||
| scan0036 | Request to make two compression plates for a Bentley engine to vary the compression ratio. | ||
| View original record | To HPS. c. to Rm/Swdl. 1129 Rm/ED.10/JH.18.10.37 Compression Plates for Bentley. Will you please make two compression plates as per SCT.70 herewith, to be used for varying the compression ratio on the… | ||
| scan0037 | Corrosion between slipper wheel fabrics and the slipper wheel, suspecting chlorine as the cause. | ||
| View original record | Rm/Ed. c. Rm/Swdl. 1129 Rm12/R.20.10.37. SLIPPER WHEEL FABRICS. We have had trouble in service due to corrosion between the fabrics and the slipper wheel when a car has been allowed to stand. The… | ||
| scan0038 | Design consideration document for a four-port exhaust system, comparing it to Bentley and Wraith heads. | ||
| View original record | To By. from Rm/Ed. c. Da. c. Rm/Swdl. c. Rm/Wym. 1129 FOUR PORT EXHAUST SYSTEM. Considerations of a four port exhaust system on a Bentley six port head (induction) and the Wraith head show the… | ||
| scan0039 | Feasibility of adapting a four-port head from the Wraith head. | ||
| View original record | -2- Rm/Ed.5/MH.8.11.37. arrangement of the exhaust system were adopted. It would appear, therefore, that a four port head can be adapted from the Wraith head without altering anything such as push rod… | ||
| scan0040 | Brief note on the complexity of a B.M.W. Cylinder Head. | ||
| View original record | H29 By. from Rm. c. Da. c. Da/Jnr. Rm4/R.17.11.37. B.M.W. Cylinder Head. This head is not as simple as it looks. Rm. | ||
| scan0041 | Comments and analysis on a B.M.W. cylinder head, comparing its component count to a Bentley engine. | ||
| View original record | To By. from Rm/Ed. c. Da. c. JNR. Rm/Ed.7/MH.16.11.37. B.M.W. CYLINDER HEAD. Comments on the above head, sketch attached, are as under:- (1) Breathing - This should be remarkably good judging from the… | ||
| scan0042 | Comparison of a B.I.W. head design to a Bentley, focusing on the higher parts count and potential for tappet noise. | ||
| View original record | -2- Rm/Ed.7/MH.16.11.37. (5) Cont'd. We therefore see that, taking the valve, cotters etc. as 1 piece we have 40% more pieces on the B.I.W. head than on the Bentley. (6) Tappet Noise. - The main… | ||
| scan0043 | Blueprint cross-section of a Frazer-Nash B.M.W. cylinder head with a hemispherical combustion chamber. | ||
| View original record | FRAZER - NASH B.M.W. CYLINDER HEAD HEMISPHERICAL COMBUSTION CHAMBER SCT. 71. E.D. 9.11.37. | ||
| scan0044 | Letter from Coventry Climax Engines Ltd regarding engine weights and testing a cylinder head. | ||
| View original record | 429. ON ADMIRALTY, WAR OFFICE AND AIR MINISTRY LISTS. ALL COMMUNICATIONS TO BE ADDRESSED TO THE COMPANY COVENTRY CLIMAX ENGINES LTD INTERNAL COMBUSTION ENGINE MANUFACTURERS TELEGRAMS 'CLIMAX' COVENTRY… | ||
| scan0045 | Note outlining the threefold gain in speed from using exhaust momentum manifolds. | ||
| View original record | 1129 To Sg. & Hs. Copies Mr. [crossed out] Lr/Lov. [crossed out] E/Dn. [crossed out] Rm. Rg. [crossed out] Ds. [crossed out] Lp. [crossed out] Lp. [crossed out] Dor/Pav.1/EKB. 7. 12. 37. [Handwritten]… | ||
| scan0046 | The effects of applying exhaust momentum manifolds to various aircraft. | ||
| View original record | THE EFFECT OF APPLYING EXHAUST MOMENTUM MANIFOLDS TO VARIOUS AIRCRAFT FITTED WITH R.R. ENGINES. Exhaust momentum manifolds have been tried out on various machines having fixed pitch airscrews, and in… | ||
| scan0047 | Technical analysis of exhaust system performance and momentum effects on various aircraft. | ||
| View original record | -2- relative to standard types of exhaust system. The results are shown plotted on Curve HK. 701, and show that in the case of the 'Spitfire', the actual gain conforms almost to the estimated gain,… | ||
| scan0048 | Engine characteristics, fuel consumption, and performance with a fixed pitch airscrew. | ||
| View original record | -3- engine characteristics, rather than altitude. At 15,000 ft., the optimum back pressures for maximum speed vary from 2½ to 4½ lbs/sq.in. at speeds from 250 to 400 MPH., corresponding to exit areas… | ||
| scan0049 | Graph showing gains in speed for various aircraft when fitted with exhaust momentum manifolds. | ||
| View original record | GAINS IN SPEED OF VARIOUS AIRCRAFT WHEN FITTED WITH EXHAUST MOMENTUM MANIFOLDS. (FIXED PITCH AIRSCREWS ONLY NOT CONSTANT SPEED) X X X REPRESENT RESULTS OBTAINED ON SIX AIRCRAFT TESTED COMPARED WITH… | ||
| scan0050 | Two graphs showing performance gains in speed and power from exhaust momentum manifolds on engines with fixed pitch airscrews. | ||
| View original record | EXHAUST MOMENTUM MANIFOLDS TOP GRAPH: TITLE: GAIN IN SPEED DUE TO INCREASE IN ENGINE POWER WITH FIXED PITCH AIRSCREW LEFT Y-AXIS: % GAIN IN H.P. AT F.T. FROM ENGINE CHARACTERISTICS. RIGHT Y-AXIS: %… | ||
| scan0051 | The development of a high-power cylinder head, discussing valve design and performance. | ||
| View original record | By. from Rm. c. Hs. c. Da. c. Hy/Jnr. c. Hm/Swdl. HIGH POWER HEAD. The attached report shows the recent development work that has been done on the single cylinder O.H. Inlet side valve exhaust engine.… | ||
| scan0052 | Power comparison report between the No. 5 'Phoenix Type' and No. 4 cylinder heads for the Bentley 50 Type engine. | ||
| View original record | BENTLEY 50 TYPE CYLINDER HEAD The above head which has a combustion chamber form similar to that which has been designed for the main engine was tested on the chassis single cylinder unit and results… | ||
| scan0053 | Engine smoothness and turbulence, comparing two high power head designs via ignition advance curves. | ||
| View original record | (II) SMOOTHNESS Turbulence is undoubtedly another factor influencing power output, but an examination of ignition curves (Fig.II) seems to indicate that, whilst it no doubt had an effect in previous… | ||
| scan0054 | Graph comparing power curves at constant detonation for different cylinder heads using a paraffin-shell fuel mixture. | ||
| View original record | -3- III. DETONATION A comparison of power curves run on a paraffin-shell mixture is shown on Fig.III. HIGH POWER HEAD FIG III POWER COMPARISON AT CONSTANT DETONATION FUEL - 50/50 SHELL NO I / PARAFFIN… | ||
| scan0055 | Report page detailing engine detonation tests, percentage power loss figures, and valve timing settings. | ||
| View original record | -4- Rm/Ed.9/AP.13.12.37. III. DETONATION cont'd The ignition being retarded in each case until detonation was only just audible. As will be seen the power for No.5. head is only slightly below that… | ||
| scan0056 | Graph and text comparing valve timings for a high power cylinder head. | ||
| View original record | -5- (2) I.O.TDC., I.C.35°L., E.O.35°E., E.C.TDC. This gave maximum low speed power at small back pressures, but seriously affected the power output relative to standard Bentley as the back pressure… | ||
| scan0057 | Report and graph showing the effect of exhaust valve lift on engine power. | ||
| View original record | -6- V. EXHAUST VALVE LIFT The Design Department stated that if rotating bottom tappets were to be used, the maximum exhaust valve lift would be about .312". A rough test was accordingly run by… | ||
| scan0058 | Mechanical failures during testing, specifically concerning cylinder head collapse and exhaust valve issues. | ||
| View original record | -7- Rm/Ed.9/AF.13.12.37 V. EXHAUST VALVE LIFT cont'd Whilst it is appreciated that the tendency for valve bounce to occur as the valve seats, is aggravated, it is not thought that this would set in as… | ||
| scan0059 | Cover note for a report on a Buick-type piston project with inconclusive results. | ||
| View original record | By. from Rm. c. to Da. c. to By/Jnr. c. to Rm/Swdl. 1129 Rm.1/AP.21.12.37. BUICK TYPE PISTON We send you a copy of the report on this project. It is only circulated for reference purposes because the… | ||
| scan0060 | Tests using Buick type pistons on a modified Bentley engine. | ||
| View original record | BUICK TYPE PISTONS. A series of tests were run on a Bentley head modified to SCT.70, and an open type 20/25. head on a bored out engine to see whether anything could be gained by using a Buick type… | ||
| scan0061 | Comparative power curve analysis between Buick type and standard Bentley pistons. | ||
| View original record | -2- I. BENTLEY Comparative power curves are shown in Fig.II, where it will be seen that for the same compression ratio, the dome pistons give a much lower power output than standard pistons. This was… | ||
| scan0062 | Graph comparing compression pressures of Buick type and standard Bentley pistons against engine RPM. | ||
| View original record | -3- Rm/Ed.2/AP.21.12.37 Fig.III. shows mean curves for the two types of pistons, with one ratio difference, and also a curve of the pressure which would be expected from theoretical considerations, if… | ||
| scan0063 | Graph comparing theoretical power curves for Buick type pistons against a standard Bentley engine. | ||
| View original record | -4- same value. Working on these figures as being proportional to the power output curves were estimated for the same conditions and results are shown in Fig.IV. Comparing these with actual FIG. IV —… | ||
| scan0064 | Comparison of calculated versus actual engine performance data, with an analysis of power loss and volumetric efficiency. | ||
| View original record | -5- results we have the following table:- RPM. 500 1000 1500 2000 2500 3000 3500 4000 Calculated. 107.5 119.0 122.5 120.0 116.0 108.5 96.5 76.5 Actual. 106.0 119.0 121.0 119.0 113.5 107.0 95.2 72.9 %… | ||
| scan0065 | Engine detonation and pre-ignition, comparing the performance of Buick and Standard Bentley pistons. | ||
| View original record | -6- DETONATION. Fig.V. shows a power comparison with the detonation intensity kept constant. It will be seen that the Buick pistons are only slightly better than the standard Bentley with a difference… | ||
| scan0066 | Performance comparison of Buick and standard pistons at various compression ratios on a 25/30 unit. | ||
| View original record | -7- Rm/Ed.2/AP.21.12.37 II. 25/30. In order to see whether the performance on the Bentley unit was due to the shape of the head, the pistons were run in a bored out 20/25. unit with an open type head,… | ||
| scan0067 | Comparative power test report on Buick type pistons versus standard pistons at constant detonation. | ||
| View original record | -8- Rm/Ed.3/AP.21.12.37 Graph Title: BUICK TYPE PISTONS — FIG: VII Graph Subtitle: COMPARATIVE POWER AT CONSTANT DETONATION. Graph Legend: Standard Pistons C.R.=7.4 Standard Pistons C.R.=6.0 Buick… | ||
| scan0068 | Recommending the suspension of single-cylinder engine work and proceeding with the B.50 engine project. | ||
| View original record | 1129 also Policy By. from Rm. c. Hs. c. REC. c. Da. c. Ey/Jnr. Rml/R.22.12.37. CAR SINGLE CYLINDER WORK. We have now reached a point where we believe it best to stop single cylinder work until we get… | ||
| scan0069 | Suspending all work on the single-cylinder chassis unit. | ||
| View original record | To HPS. from Rm/Ed. 1129 Rm/Ed.3/MH.22.12.37. SINGLE CYL. WORK - CHASSIS. Please note that all work on the above unit has been suspended until further notice. Rm/Ed. | ||
| scan0070 | Suspending work on the Buick piston project due to disappointing results. | ||
| View original record | By. from Rm. c. Sg. c. Hs. c. Ds. BUICK PISTON PROJECT. We are suspending work on the Buick type piston project for the time being. The results obtained have been disappointing, we have not succeeded… | ||
| scan0071 | Engine valve overlap and timing considerations. | ||
| View original record | 12/60 1129 24.1.38. VALVE OVERLAP. From the various positions of the inlet open and exhaust close positions relative to TDC. and their effect upon the performance of the engine as mentioned on the… | ||
| scan0072 | Valve timing settings and maximum Mean Effective Pressure and Brake Horsepower performance figures. | ||
| View original record | -2- Valve timing at running clearance, Inlet open 24° Before TDC. Inlet closes 75° Past BDC. Exhaust opens 75° Before BDC. Exhaust closes 40° Past TDC. (2) Exhaust closing at 6° before TDC. over heavy… | ||
| scan0073 | Experiments on engine valve overlap timing. | ||
| View original record | Experiments on Amount of Valve Overlap The general idea of opening the inlet early is to give a longer time of full opening. This is not so effective as might be supposed, but to understand the… | ||
| scan0074 | Analysis of advanced valve timing at Top Dead Centre (T.D.C.) and its effect on residual cylinder and exhaust pressures. | ||
| View original record | 3. there will still be some gas to be pushed out. In other words, if the valve shuts at T.D.C. there is bound to be a higher residual pressure than if the valve were still slightly open. To… | ||
| scan0075 | Graph comparing cylinder pressure and exhaust stub pressure with advanced valve timing at 3000 rpm. | ||
| View original record | Press. in exhaust stub. 3000 rpm. Full throttle. INDUCTION B.D.C. Press. in Cyln. EXHST. -> B.D.C. T.D.C. Atmospheric +4 lb/in² +2 -2 -4 lb/in² Valve timing all advanced 20°, giving exhaust closing at… | ||
| scan0076 | Hand-drawn graph plotting engine pressure against crank angles, detailing induction and exhaust cycles at 3500 rpm. | ||
| View original record | Y-Axis: +4 lb/in^2, +2, Atmospheric, -2, -4 lb/in^2 X-Axis: Crank Angles -> Graph Data & Annotations: 3500 rpm. Press in Inlet stub Induction Press. in cyln. Exhaust B.D.C. T.D.C. Notes: Normal valve… | ||
| scan0077 | Engine valve timing, performance comparisons between J.A.P. and Austin engines, and development targets. | ||
| View original record | 4. These were taken with the J.A.P. engine & others were taken with the Austin & showed the same effect. In that case the timing was altered by increasing the valve clearance. The actual opening at… | ||
| scan0078 | Letter discussing a paper on steering and personal matters. | ||
| View original record | 5 You do not mention your change of residence. Where is it & is it satisfactory to both of you? That is an excellent paper of Basto's on steering. I never studied steering before & am much… | ||
| scan0079 | Letter to Dr. J.C. Morrison regarding engine valve timing experiments and enclosed report. | ||
| View original record | 1129. get report out of 1360 and file with this letter Rm2/R. 24th January, 1938. Dr. J.C. Morrison, The University, G L A S G O W. Dear Dr. Morrison, VALVE OVER-LAP. I have got some figures relative… | ||
| scan0080 | Letter discussing a difficulty with exhaust valve closing and the length of the toe used in cams. | ||
| View original record | Swor files 1360? Rm 2 / R. James Watt Engineering Laboratories, The University, Glasgow. 1129 ? 29th Jan. Dear Mr Robotham Thanks for your letter of the 24th inst. & for the report on the question of… | ||
| scan0081 | Letter from John C. Morrison of the University of Glasgow discussing engine testing and other projects. | ||
| View original record | UNIVERSITY OF GLASGOW progress is slow as there are so many other things to be attended to. One gets curious jobs at times. - the agricultural College has just asked us to produce a device to… | ||
| scan0082 | Possibilities of a two-valve ramp cylinder head design to reduce engine detonation. | ||
| View original record | 1129. By/ALD. from Rm. c. By. c. Da/Jnr. Rm9/R.1.4.38. COMBUSTION CHAMBER DESIGN. When Taub was here the other day, he became enthusiastic over the possibilities of the two-valve ramp head if used… | ||
| scan0083 | The process and rationale for conducting single-cylinder engine work as the need arises. | ||
| View original record | 1129. Hs. from Rm. Rm11/R.6.5.38. SINGLE CYLINDER WORK. We are doing a small amount of single cylinder work as necessity arises. A good deal of money has, in the past, been spent on making pieces, and… | ||
| scan0084 | Letter from James Watt Engineering Laboratories regarding a visit to the works. | ||
| View original record | Wed. June 15th 1129. James Watt Engineering Laboratories, The University, Glasgow. 18th May. Dear Mr Robotham Thanks for your letter of the 13th May. I shall be very interested to see your results. I… | ||
| scan0085 | Letter from the James Watt Engineering Laboratories discussing the performance testing of an Alvis engine. | ||
| View original record | 11299 James Watt Engineering Laboratories, The University, Glasgow. 12 May. 38 Dear Mr Robotham I took the Alvis engine out of my car during the Xmas holidays & have spent most of my spare time on it… | ||
| scan0086 | Letter on University of Glasgow letterhead from John C. Morrison discussing engine noise, manifold modification, and new engine performance. | ||
| View original record | UNIVERSITY OF GLASGOW to the Principal! I'll invite him in while a test is going on & knock off the silencer & give him some idea of what a noise can be like! After obtaining representative diagrams… | ||
| scan0087 | Letter discussing tests on Duplex manifold and separate exhaust systems. | ||
| View original record | 1129. also. spare T. Rm3/R. 13th May, 1938. Dr. J.C. Morrison, James Watt Engineering Laboratories, The University, GLASGOW. Dear Dr. Morrison, Many thanks for your letter of May 12th. Just as we had… | ||
| scan0088 | Letter to Dr. J.C. Morrison concerning the status of O.H.V. engine testing. | ||
| View original record | Dr. J.C. Morrison. -2- 13.5.38. We have not yet made a model of the O.H.V. inlet side exhaust. The O.H. camshaft engine is, however, running very well. We are, of course, using it for exhaust tests.… | ||
| scan0089 | Letter to Dr. J.C. Morrison regarding a potential meeting at the Works on June 15th. | ||
| View original record | 1129. Rm2/R. 20th May, 1938. Dr. J.C. Morrison, James Watt Engineering Laboratories, The University, GLASGOW. Dear Dr. Morrison, Thank you for your letter of the 18th May. I expect to be at the Works… | ||
| scan0090 | Letter from James Watt Engineering Laboratories discussing the sharing of experimental data and system results. | ||
| View original record | 223? James Watt Engineering Laboratories, The University, Glasgow. 13th June. Dear Mr. Robotham Owing to the failure of the I.A.E. Visit I shall not be in Derby this week nor have I any prospects of… | ||
| scan0091 | Letter detailing test results on exhaust systems and camshaft timings for a 4¼-litre Bentley engine. | ||
| View original record | 223 Experimental Dept. Rm/Swdl./MH. 15th. June 1938. Dr. J.C.Morrison, James Watt Engineering Laboratories, The University, GLASGOW. Dear Sir, I have been instructed by Mr. Robotham to give you some… | ||
| scan0092 | Letter to Dr. J.C. Morrison regarding conclusions on later exhaust closing for improved performance. | ||
| View original record | Dr.J.C.Morrison. -2- 15th. June 1938. concluded that it is the later exhaust closing that is responsible for the improvement and that the same or a better result will be obtained by using the early… | ||
| scan0093 | Letter to Mr. Robotham from the University of Glasgow discussing the basis of a technical consultation and the expenses incurred. | ||
| View original record | RM 3/R. of 13 may. Rm /Swdl.3/W.H. of 15 June. 1129 SWDL. James Watt Engineering Laboratories, The University, Glasgow. 25th June. 38. Dear Mr Robotham I have delayed replying to Mr Swindall's letter… | ||
| scan0094 | Letter from the University of Glasgow requesting a donation of machinery due to a lack of funds for their workshop and laboratory. | ||
| View original record | UNIVERSITY OF GLASGOW 2. problem purely as a speculation & have therefore no claim on you. But though I neither claim nor ask any financial recognition of my efforts on your behalf I suggest that your… | ||
| scan0095 | Letter expressing frustration over the design of an engine exhaust system and the lack of confidence shown. | ||
| View original record | UNIVERSITY OF GLASGOW 3. in making the above suggestion. Referring briefly to Mr Swindalls' letter, I note with surprise that you have tried two standard systems on the one manifold. I told you at the… | ||
| scan0096 | Letter discussing engine performance issues, including power, noise, and compression. | ||
| View original record | UNIVERSITY OF GLASGOW 2. both from the noise & power point of view. If you won't tell me how far you are prepared to go in providing space & in altering valve timing I can't be expected to do much… | ||
| scan0097 | Outlining further tests on a Bentley single cylinder unit to match B.60 specification. | ||
| View original record | 1/29? To By. c. to Da/Jnr. c. to Hx/McS. c. to HPS. Rm/Swdl.18/JR.27.6.38. BENTLEY SINGLE CYLINDER. In order to carry out some further tests on the above unit particularly in regard to the durability… | ||
| scan0098 | Letter to Dr. J.C. Morrison of Glasgow University regarding a complex silencing problem and previous correspondence. | ||
| View original record | 1129 Rm3/R. 28th June, 1938. Dr. J.C. Morrison, The University, G L A S G O W. Dear Dr. Morrison, Thank you for your letter of the 25th June. Replying to the second paragraph, at the moment we are… | ||
| scan0099 | Letter from John C. Morrison of Glasgow University to Mr. Robotham regarding a misunderstanding and the cessation of their cooperation. | ||
| View original record | 1129 Rm 3/R. [Printed Letterhead with crest] James Watt Engineering Laboratories, The University, Glasgow. 30 June. 38. Dear Mr Robotham I am in receipt of your letter of the 28th June & note your… | ||
| scan0100 | Taking over a High Power Head engine project that Leylands abandoned due to exhaust valve issues. | ||
| View original record | 1129 also 1175 By: from Rm. c.c. Da. c.c. Da/Jnr. c.c. HPS. c.c. Rm/Swdl. Hives Rm2/R.1.7.38. Attached is a copy of a letter we have received from Leylands. We have handed over the in-formation… | ||
| scan0101 | Letter from Leyland Motors discussing connecting rods, an engine test report, and crankcase painting. | ||
| View original record | C O P Y. LEYLAND MOTORS LIMITED, LEYLAND, Lancashire. VWP/AM. 30th June, 1938. W.A. Robotham, Esq., Rolls-Royce Limited, DERBY. Dear Mr. Robotham, We thank you for the opportunity granted to our… | ||
| scan0102 | Letter from Leyland Motors regarding the painting processes for engine cylinder blocks and crankcases. | ||
| View original record | -2- 30.6.38. The Cub cylinder block and crankcase are made in cast iron, the inside of the crankcase and water jackets are sprayed with "Sellonite" grey filler which is supplied by Thomas Howse,… | ||
| scan0103 | Request for blueprints and parts for a high power Bentley single-cylinder engine test, focusing on an increased compression ratio. | ||
| View original record | To Des Swdll See me HPS. c. Rm. c. Rm/Swdl. BY/Ald.16/G.5.10.38. -- 1129 . HIGH POWER. BENTLEY SINGLE CYLINDER. HEAD TYPE. CYLINDER. SECTION 5050. PISTON. SECTION 5040. VALVE & FITTINGS. SECTION 5060.… | ||
| scan0104 | Experimental department report on the vibration of a 4.2' bore single cylinder liquid-cooled sleeve valve engine. | ||
| View original record | T.R.R. 306. ST. 30966. 6/11/37. C.E. SWOL - Celes EXPERIMENTAL DEPARTMENT REPORT REFERENCE:— Lr/HWS./SGL.6/GB.17.10.38. Subject of Report:— Vibration of 4.2" bore single cylinder liquid cooled sleeve… | ||
| scan0105 | The vibration of a 4.2' bore single-cylinder liquid-cooled sleeve valve engine. | ||
| View original record | Lr/HWS./SGL.6/GB.17.10.38. VIBRATION OF 4.2" BORE SINGLE CYLINDER LIQUID COOLED SLEEVE VALVE ENGINE. Vibration records have been obtained during the course of a Power Curve Run, a Boost Response and… | ||
| scan0106 | Vibration data for a single-cylinder L.C. sleeve valve 4.2' engine under various conditions. | ||
| View original record | SINGLE CYLINDER L.C. SLEEVE VALVE ENGINE 4.2" ENGINE. VARIATION OF VIBRATION WITH DIFFERENT ENGINE CONDITIONS. | | R.P.M. | B.M.E.P. (lbs/sq.inch) | Plug | | Centre of head. | | Head Flange. | |… | ||
| scan0107 | Graph showing vibration variation during a power curve run on a liquid-cooled single-cylinder sleeve valve engine. | ||
| View original record | LIQUID COOLED SINGLE CYLINDER SLEEVE VALVE 4.2 BORE VS1 VARIATION OF VIBRATION DURING A POWER CURVE RUN AT 16 BOOST RANGE OF VIBRATION INCHES X 10⁻³ 50 40 30 20 10 x PLUG INSERT o CENTRE HEAD □ HEAD… | ||
| scan0108 | Graph showing the variation of vibration with ignition advance for a liquid-cooled single-cylinder sleeve valve engine. | ||
| View original record | LIQUID COOLED SINGLE CYLINDER SLEEVE VALVE 4.2" BORE VS 2 VARIATION OF VIBRATION WITH IGNITION ADVANCE ENGINE RUN:- 4000 R.P.M. 5.6" BOOST RANGE OF VIBRATION INCHES x 10^-3 DEGREES ADVANCE PLUG INSERT… | ||
| scan0109 | Graph showing the variation of vibration with boost for a liquid-cooled single-cylinder sleeve valve engine. | ||
| View original record | LIQUID COOLED SINGLE CYLINDER SLEEVE VALVE 4 1/2" BORE VS 3 VARIATION OF VIBRATION WITH BOOST ENGINE RUN AT 3920 RPM RANGE OF VIBRATION [INCHES x 10^-3] * PLUG INSERT ○ CENTRE HEAD ⊕ HEAD FLANGE ∇… | ||
| scan0110 | Experimental department report on the vibration of a 5.5' bore single cylinder S.V. engine. | ||
| View original record | R.R. 306. ST. 30966. 6/11/37. C.E. 1129 EXPERIMENTAL DEPARTMENT REPORT REFERENCE:- Lr/HWB/SGL.1/GB.21.11.38. Subject of Report:- Vibration of 5.5" bore Single Cylinder S.V. Engine. General… | ||
| scan0111 | Vibration readings taken from a 5.5' S.V. single-cylinder engine unit. | ||
| View original record | Lr/HWS./SGL.1/CR.21.11.38. 5.5" S.V. SINGLE CYLINDER UNIT. Vibration records have been taken at points on the cylinder head and crankcase of the 5.5" S.V. single cylinder engine. The results were very… | ||
| scan0112 | Graphs showing vibration of a 5.5 inch bore single cylinder side-valve engine. | ||
| View original record | GRAPHS SHEWING VIBRATION OF 5.5" BORE SINGLE CYL S.V. ENGINE. POWER CURVE RUN IGN. ADVANCE RUN V59 RANGE OF VIBRATION PLUG INSERT .080" .060" .040" .020" CYL. HEAD FLANGE CRANKCASE 2500 3000 3500… | ||
| scan0113 | Report comparing single cylinder head and piston configurations for a Bentley engine, with accompanying diagrams. | ||
| View original record | 1129 To By. from Rm/Swdl. c. Da. c. Da/Jnr. c. Da/McS. Rm/Swdl.1/MH.23.12.38. SINGLE CYLINDER HEAD COMPARISON. We give herewith a report of several tests that have been carried out on the above engine… | ||
| scan0114 | Report page analyzing ramp head engine performance and spark plug positioning. | ||
| View original record | -2- Rm/Swdl.1/MH.23.12.38. Thus we disagree with Taub's theory as applied to this particular head. Regarding the non-detonating power (Curve c), these follow closely the above maximum power… | ||
| scan0115 | Comparing two cylinder head designs, including diagrams and specifications for valve timing and compression ratios. | ||
| View original record | -3- Reverting to the high power head (No.5) which is similar to B.60, the Curve (a) confirms within 2%, to that given in Rm.2/R.14.12.37 (Fig.II). Likewise the power given with the Bentley cylinder… | ||
| scan0116 | Test report and blueprint for a Bentley No. 3a cylinder head, with comparison to a No. 5 head. | ||
| View original record | -4- Rm/Swdl.1/MH.23.12.38. No 3a BENTLEY HEAD 6.4:1 RATIO 1.4 INLET & 1.3 EXHAUST A further Bentley cylinder head was tried having 1.5 inlet and 1.4 exhaust with a compression ratio of 6.6 : 1 and by… | ||
| scan0117 | Note on engine timing for single carburetter characteristics and port ramming to achieve optimum results. | ||
| View original record | -5- Rm/Swdl.1/MH.23.12.38. This shows that a single version of a main engine is not representative and requires a timing suitable for the characteristics of a single carburetter and its port ramming… | ||
| scan0118 | Graph comparing the maximum power figures of different single cylinder engine heads. | ||
| View original record | CURVE a. SINGLE CYLINDER POWER COMPARISON. MAXIMUM POWER FIGURES ① Nᵒ 5 HEAD RATIO: 6·4 IO: TDC IC: 30°PBDC. EO: 50°B. EC: TDC ② BEN HEAD RATIO: 6·6 VALVE SIZES: 1·5 IN. 1·4 EX. IO: 10°B IC: 30°P EO:… | ||
| scan0119 | Graph comparing Mean Effective Pressure (MEP) against RPM for different ramp head and piston configurations at maximum power. | ||
| View original record | CURVE b. RAMP HEAD COMPARISONS. (MAX. POWER) ① RAMP HEAD. STD. PISTON. 6.6 : 1 RATIO ② " " CROWN PISTON. 6.6 : 1 " ③ " " " " 7.3 : 1 " PLUG IN EXHAUST POSITION. Nº ③ RECOMMENDED BY TAUB. VALVE TIMING.… | ||
| scan0120 | Graph of a non-detonating power curve on Redline fuel, showing M.E.P. and ignition advance vs R.P.M. | ||
| View original record | CURVE C. NON DETONATING POWER CURVE (B) ON REDLINE FUEL. M.E.P. R.P.M. IGN. ADV. ° BTDC IGN. ① ② ③ | ||
| scan0121 | Graph comparing Mean Effective Pressure vs. engine R.P.M. for a spark plug in the exhaust position versus the side position. | ||
| View original record | CURVE d. COMPARISON OF PLUG IN EXHAUST POSITION AGAINST SIDE POSITION. NON DETONATING POWER REDLINE. RAMP HEAD & STD. PISTON. 6.6 : 1 RATIO ① PLUG IN EXH. POSITION ② " " SIDE " " M.E.P. 130 120 110… | ||
| scan0122 | Scheme for modifying the crankcase and camshafts in the Bentley Single Cylinder Unit. | ||
| View original record | 1129 To By/Ald. c. to Da/JNB. Rm/Ed.16/JH.10.1.39. Bentley Single Cylinder Unit. Will you please look into a scheme for modifying the bottom half crankcase and camshafts in the above unit (LEC.3606)… | ||
| scan0123 | Official order for bearing races for a Bentley S/C Unit. | ||
| View original record | 1129 To Roy. c. to G/JWH. Rm/Ed.14/JH.27.1.39. Bentley S/C Unit. Will you please pass an official order to The Hoffman Bearing Co. Chelmsford, for the following roller races ordered by telephone. 3… | ||
| scan0124 | Letter from the Experimental Department to The Hoffman Manufacturing Co. Ltd. regarding an urgent order for bearings. | ||
| View original record | 1129 EXPERIMENTAL DEPARTMENT. Rm/Ed.8/JH. 30th. January, 1939. The Hoffman Manufacturing Co.Ltd., Chelmsford, ESSEX. Dear Sirs, With reference to my 'phone call of the 27th. and your wire of todays… | ||
| scan0125 | Request to draw up a scheme for fitting a Sunbury Pressure element to a B.II head. | ||
| View original record | 1129. To By/Ald. Rm/Ed.19/JH.2.2.39. Pressure element for Cathode Ray Indicator. Will you please draw up a scheme for fitting a Sunbury Pressure element to a B.II head. It is suggested that this be… | ||
| scan0126 | Requesting additional flanges and adaptors for the B.60 Chassis' standard Sunbury Indicator fittings. | ||
| View original record | 1129 - To HFC. c.c. to Rm/Swdl. c.c. to Da/Jnr. Rm/Ed..15/JH.2.2.39. B.60. Chassis. Standard Sunbury Indicator Fittings. Further to memo. By/Ald.1/G.25.1.39. will you please instruct the following… | ||
| scan0127 | Clarifying specifications for Single Cylinder Bentley Unit heads and requesting a new scheme. | ||
| View original record | 1129 To By/Ald. Rm/Ed.15/JH.7.2.39. Single Cylinder Bentley Unit. Cylinder heads. Some confusion seems to have arisen in the shop with regard to the two heads EB.343 and EXc.1060. It would appear that… | ||
| scan0128 | Requesting the machining of a high power single cylinder unit block. | ||
| View original record | 1129 To HPS. c. to Da/Jnr. Rm/Ed.5/JH.8.2.39. HIGH POWER SINGLE CYLINDER UNIT. Will you please machine 060" from the base of the cylinder block at present fitted to this unit. This modification is… | ||
| scan0129 | Parts list for a Bentley single cylinder high power head, detailing required components by section. | ||
| View original record | 1129.? HPS. c. Rm. C. Rm/12d. By/Ald.2/AW.15.2.39. BENTLEY SINGLE CYLINDER - HIGH POWER HEAD. CRANKCASE & BEARINGS - SECTION 5000. CYLINDER - SECTION 5050. CAMSHAFT - SECTION 5090. VALVES & FITTINGS -… | ||
| scan0130 | Listing parts with quantities, organized by section number, required for testing on a single-cylinder unit. | ||
| View original record | -2- By/Ald.2/AW.9.2.39. Section 5090. K.4008. Nut for Camshaft Gear Wheels. 10 off. KB.2954. Lockwasher for Camshaft Gear Wheels. 10 off. A.50571. Key for Cam. 2 off. KB.5058. Nut for Camshaft. 2 off.… | ||
| scan0131 | The purchase of one Indicator Valve from Messrs. Dobbie McInnes & Clyde Ltd. | ||
| View original record | 1129 To Roy. from Rm/Ed. c. G/JWH. Rm/Ed.6/MH.20.2.39. FARNBOROUGH INDICATORS. Will you please order one Indicator Valve from Messrs. Dobbie McInnes & Clyde Ltd. of Glasgow as per copy of letter… | ||
| scan0132 | Letter to Messrs. Dobbie, McInnes & Clyde Ltd. requesting the urgent forwarding of a 'C' type Indicator valve. | ||
| View original record | Experimental Dept. RM/Ed.7/MH. 20th. February, 1939. Messrs. Dobbie, McInnes & Clyde Ltd., 57. Bothwell Street, GLASGOW, Scotland. Dear Sirs, Will you please forward one 'C' type Indicator valve, 14… | ||
| scan0133 | Request to manufacture extension pieces and two complete valves for a Farnborough indicator valve related to a Chassis C/C Unit. | ||
| View original record | 1129 To HPT. Rm/Ed.8/JH.20.2.39. Chassis C/C Unit. Will you please make two extension pieces for a Farnborough indicator valve as per the attached sketch SCT.100. We wlao require two valves complete… | ||
| scan0134 | Request to replace a loose valve seat on a Bentley Single Cylinder head with an oversized one. | ||
| View original record | 1129 To HPS. Rm/Ed.7/JH.20.2.39. BENTLEY SINGLE CYLINDER. A valve seat on number 4 head in the above unit as worked loose. Will you please replace this by an oversized seat which will be supplied by… | ||
| scan0135 | Instruction for parts and blueprints for a Single Cylinder Bentley High Power Unit cylinder head. | ||
| View original record | 1129 c. Rm. [REDACTED] By/Ald.1/AW.21.2.39. SINGLE CYLINDER BENTLEY HIGH POWER UNIT. CYLINDER HEAD - SECTION 5059. Please receive herewith 2 Blue Prints of the following new Drawings:- EXS. 1470 -… | ||
| scan0136 | Work instructions for a single cylinder unit and B.60 engine components. | ||
| View original record | 1129 To HPS. c. to HPS/WSC. Rm/Ed.9/JH.22.2.39. WORK INSTRUCTED IN SHOP. Single Cylinder Unit. (1) Replacement valve seat in No.4 head, instructed Rm/Ed.7/JH.20.2.39. This job is urgently required and… | ||
| scan0137 | Requesting an official order be placed with Dobbie McInnes and Clyde Ltd. for six valve discs for a Farnborough Indicator. | ||
| View original record | 1129 To Roy. c. to G/JWH. Rm/Ed.4/JH.6.3.39. Farnborough Indicator. Will you please pass an official order to Dobbie McInnes and Clyde Ltd. of Glasgow for six valve discs as per copy of letter… | ||
| scan0138 | Letter from the Experimental Department requesting spare valve discs and material information. | ||
| View original record | EXPERIMENTAL DEPARTMENT. Rm/Ed.5/JH. 6th. March, 1939. Messrs. Dobbie McInnes & Clyde Ltd., 57, Bothwell Street, Glasgow. Dear Sirs, Will you please supply as soon as possible, six spare valve discs… | ||
| scan0139 | Status update memo on various components for the Single Cylinder Bentley project. | ||
| View original record | 1129 To HPS. from Rm/Ed. c. HPS/WSC. SINGLE CYLINDER BENTLEY. Further to memo Rm/Ed.9/JH.22.2.39, the position of the various items enumerated does not appear to have altered appreciably. (1)… | ||
| scan0140 | Order request for an 'A' type indicator valve and six spare valve discs for a Single Cylinder Bentley. | ||
| View original record | 1129 c. Roy. c. G/J.H. File Rm/Ed 7/ER 17.3.39. Single Cylinder Bentley. Will you please order one "A" type indicator valve and six spare valve discs, as per letter, copy attached. Rm/Ed. | ||
| scan0141 | Typed letter requesting the urgent supply of a Farnborough Indicator valve and spare parts. | ||
| View original record | Rm/Ed 7/ER 17th March, 1939. Dobbie McInnes & Clyde Ltd., 57, Bothwell Street, Glasgow. Dear Sirs, Will you please forward as soon as possible one "A" type Farnborough Indicator valve, with six spare… | ||
| scan0142 | Required drawings and parts for modifying a Bentley 11 cylinder head. | ||
| View original record | 1129? HDS. c. Rm. c/Rm/Md. By/Ald.1/AW.13.3.39. BENTLEY 11. Cylinder Head - SECTION 5050. Please receive herewith 2 blue prints of each of the following:- SCD.1222. Fitting of Sunbury Pressure Element… | ||
| scan0143 | Instructing the development and testing of new cylinder and piston designs for a Bentley S/C unit. | ||
| View original record | 1129 To By/Ald. from Rm/Ed. Rm/Ed..1/MH.17.3.39. BENTLEY S/C UNIT. Will you please detail and instruct one 3.500" bore cylinder which will be interchangeable with the existing blocks as far as valve… | ||
| scan0144 | Analysis of a direct injection combustion chamber and multi-hole nozzle from the National Gas & Oil Engine Co. | ||
| View original record | 1129? Rm... from Da/AM. Da/AM.1/N.18.3.39. Information obtained from Mr.Blea, late of the National Gas & Oil Engine Co. now at Rolls-Royce. The National Co. use an open (Direct Injection) combustion… | ||
| scan0145 | Continuation of notes on engine nozzles, shrouded valves, fuel pumps, and superchargers. | ||
| View original record | -2- Da/AM.1/N.18.3.39 Cont'd. ------------------- 'burr' raised on it if carelessly handled on the bench. This type of nozzle can be used in air-cell engines (Ricardo-Comet, Lanova, and M.A.N.) but… | ||
| scan0146 | The order of twelve corrujoint washers for a Single Cylinder Bentley. | ||
| View original record | 1129 To Roy. c. to G/JWH. Rm/ED.8/JH.23.3.39. Single Cylinder Bentley. Will you please order twelve corrujoint washers from the Southwark Manufacturing Co. to the attached pattern. Rm/ED. | ||
| scan0147 | The requirements for adapting a single-cylinder Bentley engine head for testing various compression ratios and throat sizes. | ||
| View original record | 1129 To By/Ald. Rm/Ed.3/JH.25.3.39. Single Cylinder Bentley. We attach herewith a sketch of the EXS.1383 B.60 head showing how this may be adapted to accommodate three compression ratios and a… | ||
| scan0148 | Outstanding and delayed parts for a single cylinder Bentley unit. | ||
| View original record | 81129 To HPS. from Rm/Ed. Rm/Ed.8/MH.27.3.39. SINGLE CYLINDER BENTLEY PARTS. Further to our memo Rm/Ed.5/MH.11.3.39, we should be glad if you would build the above unit up to include the following… | ||
| scan0149 | Requesting to fit up a charging plant on a test bed for a Bentley S/C Unit. | ||
| View original record | 1/29. To HPS. from Rm/Ed. Rm/Ld.4/MH.30.3.39. BENTLEY S/C UNIT. O/N.52421. Will you please fit up a charging plant on the above test bed. Rm/Ed: | ||
| scan0150 | Listing outstanding jobs for the single cylinder unit and requesting estimated completion dates. | ||
| View original record | 1129 To HPS. from Rm/Swdl. Rm/Swdl.12/MH.30.3.39. SINGLE CYLINDER UNIT. The following is a list of the outstanding jobs on the single for which we should like an idea as to their completion date. (1)… | ||
| scan0151 | General programme of work for a single cylinder unit. | ||
| View original record | 1129 COPY FOR FILES. To Rm. from Rm/Ed. Typed 30.3.39. SINGLE CYLINDER WORK. The above unit is to be converted as soon as possible to incorporate a modified valve gear with standard fixed cams. It is… | ||
| scan0152 | Programme of tests for a single cylinder unit, including coolant, gasket, and new cylinder head evaluations. | ||
| View original record | 1129 To Rm. from Rm/Ed. Rm/Ed.3/MH.1.4.39. PROGRAMME FOR SINGLE CYLINDER UNIT. (1) COOLANT TESTS. Tests to be run under the following conditions in an attempt to equalise the temperatures over the… | ||
| scan0153 | Engine testing procedures for fuel consumption, ignition curves, and the effect of distance between the head and piston. | ||
| View original record | -2- (c) Consumption loops at 1000, 3000 and 4000 r.p.m. 1% retard; Ethyl fuel. (d) Ignition advance curves at 1000, 3000 and 4000 r.p.m; W.M.M.P. fuel consumption; Ethyl fuel. (4) EFFECT OF DISTANCE… | ||
| scan0154 | Specification sheet for Beardmore and other railcar engines. | ||
| View original record | 1129 COPYFOR FILES. To Rm. from Rm/Ed. Typed 4.4.39. RAILCAR ENGINES. Beardmore:- 6 cyl. 225/250 H.P. 6½" bore x 9" stroke. Weight 4,800 lb. or 19 lbs/H.P. 6 cyl. 90/100 h.p. 4½" bore x 6" stroke.… | ||
| scan0155 | List of engine specifications used by various international railway companies. | ||
| View original record | -2- 4.4.39. NEW SOUTH WALES RAILWAYS. Burmeister 8 cylinder 2-strokes. 660 H.P. at 2100 R.P.M. made by Harland & Wolff. CEYLON RAILWAYS. 6-cylinder 4-stroke D.I. engines, 6" bore x 8" stroke,… | ||
| scan0156 | The investigation of detonation indication on single cylinder units using a Cathode-ray unit. | ||
| View original record | 1129 To: RM. Copy to:- RM/Edwards. Lr/HWS.2/FEC. 12. 4. 39. Re: DETONATION INDICATION ON SINGLE CYLINDER UNITS. The Cathode-ray unit has now been developed for use with the modified "Sunbury" cylinder… | ||
| scan0157 | Asking for the current status of various engine components and systems. | ||
| View original record | 1129 Rm/Swdl. from Rm. Rm3/R.19.4.39. ENGINE POSITIONS. What is the position of:- (1) Ripple engine (2) 4-cyl. crankshafts and connecting rods. (3) Chain drive parts. (4) Improved Buick type damper… | ||
| scan0158 | Request to mark up a print of a Bentley single cylinder head to conform to the design of a Wraith cylinder head. | ||
| View original record | 1129 To By/Ald. Rm/Ed.15/JH.26.4.39. BENTLEY SINGLE CYLINDER UNIT. Will you please mark up print EB.1517 of 3 1/4 bore Bentley single cylinder head to conform as nearly as possible to the present… | ||
| scan0159 | Request to modify an existing Bentley Single Cylinder Head to conform to Wraith lll specifications. | ||
| View original record | 1129. HPS. c. Rm. c. Rm/Ed. By/Ald.4/AW.27.4.39. BENTLEY SINGLE CYLINDER. CONVENTIONAL HEAD. CYLINDER - SEC:5050. Please receive herewith 2 "Marked up" blue prints of the following:- EXS.1613.… | ||
| scan0160 | Design for 'dieselising' the S/C unit, including the cylinder head and piston arrangement. | ||
| View original record | 1129 To By/Ald. Rm/Ed.8/JH.16.5.39. DIESELISING THE S/C UNIT. We hand you herewith a cylinder head and piston arrangement designed for a two stroke engine. We should be glad if you would scheme out… | ||
| scan0161 | Request to investigate the design changes required to convert a 4¼-litre high-power engine into a 3½-litre unit. | ||
| View original record | 1129. Da/Jnr. from Rm. Rm2/R.17.5.39. Will you please go into the question of design necessary to convert the 4¼-litre high-power engine into a 3½-litre high-power unit. Rm. | ||
| scan0162 | Seeking payment approval for an invoice for a die from The Southwark Manufacturing Co. | ||
| View original record | 1129. Yde S/C Rm/Mr.Edwards. ROY/FS.5/P.18.5.39. With reference to the Die received on 20th ulto. from The Southwark Manufacturing Co. for making corrugations round the 3/8" dia. hole, we have now… | ||
| scan0163 | Agreeing to pass the cost of Corrujoint dies bought from The Southwark Manufacturing Co. for payment. | ||
| View original record | 1129 To Roy. from Rm/Ed. c. Roy/FS. Rm/Ed.7/MH.23.5.39. CORRUJOINT DIES. Further to memo Roy/FS.5/P.18.5.39, we agree that cost of die bought from The Southwark Manufacturing Co. may be passed for… | ||
| scan0164 | The status of the 3¼ bore High Power Engine and whether castings can be instructed. | ||
| View original record | 1129 To Rm/Gry. from Rm. Rm.3/MH.25.9.39. Will you please find out while you are at Duffield tomorrow, the position of the 3¼ bore High Power Engine details. Are we in a position to instruct castings… | ||
| scan0165 | The investigation and redesign of high power cylinder heads. | ||
| View original record | 1129 & 1124 To Ev. c. to Jnr. c. to Rm/Gry. c. to Rm/Wym. c. to Rm/GIS. Rm/Swd1.2/JH.12.10.39. HIGH POWER CYLINDER HEADS. Further to our report Rm/wdl.2/MH.1.2.39. regarding the investigation of the… | ||
| scan0166 | Comparison of engine head modifications and their performance characteristics. | ||
| View original record | -2- (2) EXS.1384 which is a modification to the original head, yet without a pattern tear up the only alteration being to lower the water space around the sparking plug. The special features of this… | ||
| scan0167 | The development and testing of a modified cylinder head, detailing iterative changes to its compression ratio and performance characteristics. | ||
| View original record | -3- Rm/swdl.2/JH.12.10.39. This is confirmed by the condition of the cylinder head gasket when carrying out detonation loops, i.e. M.E.P. against advance. As far as can be noted on the bed the idling… | ||
| scan0168 | Blueprint illustrating three stages of modification to a mechanical component, showing plan and cross-section views. | ||
| View original record | 590 EB.3844 Exs.1809 MODIFICATIONS DEEPER PLUG RECESSES. Exs.1384 MODIFICATION GRADUATING THE INCREASED THROAT EXS.1383 MACHINING .100 OFF THE FACE GIVING A COMPRESSION OF 11LCS = 7.0:1 C.R. Exs.1758… | ||
| scan0169 | Performance comparison graph for a B.60 cylinder head. | ||
| View original record | B.60 CYLINDER HEAD COMPARISON. S.100 B.60 N° 3 UNIT. CAMSHAFT: E.B.4332 VALVE TIMING. I.O. 9° A.T. E.O. 27° B.B. I.C. 49° A.B. E.C. 11° A.T. PISTONS: AEROLITE (FLUSH TOP) INDN. SYSTEM 2 - 1½" S.U.'S… | ||
| scan0170 | Performance graph comparing cylinder head configurations for the B.60 No. 3 unit. | ||
| View original record | B.60 CYL. HEAD COMPARISON S.101 . B.60 Nº3 UNIT CAMSHAFT E.B.4332 VALVE TIMING I.O. 9º A.T. E.O. 27º B.B. I.C. 49º A.B. E.C. 11º A.T. PISTONS: AEROLITE (FLUSH TOP) INDN. SYSTEM 2 - 1½" S.U.'S ON 1-6"… | ||
| scan0171 | Performance comparison graph for a B.60 cylinder head under various configurations. | ||
| View original record | B.60. CYL. HEAD COMPARISON S.102 B.60. Nº3 UNIT CAMSHAFT F.B 4332 VALVE TIMING I.O. 9° A.T. E.O. 27° B.B. I.C. 49° A.B. E.C. 11° A.T. PISTONS AEROLITE (FLUSH TOP) INDN. SYSTEM 2 - 1 1/2" S.U's ON 1.6'… | ||
| scan0172 | Specification sheet for a White 12-cylinder horizontally opposed bus engine. | ||
| View original record | WHITE 12 CYLINDER HORIZONTALLY OPPOSED BUS ENGINE No of cylinders 12 Bore & Stroke 4¼ x 4¼ Piston displacement 681 cu: in: Max: BHP‡ 210 @ 3000 RPM Compression ratio 5.88 to 1 Max: torque 500 lbs at… | ||
| scan0173 | Issue of excessive blow-by in high power engines, its effects, and proposed solutions for the piston ring set-up. | ||
| View original record | 1129 To Rm/CTS. from Rm. c. Jnr. Rm.1/MH.2.12.39. BLOW-BY ON HIGH POWER UNITS. The blow-by on the high power engines is excessive as you have observed. Whilst the evils of blow-by have been much… | ||
| scan0174 | List of questions regarding high power engine performance, cylinder wear, and blow-by. | ||
| View original record | -2- Rm.1/MH.2.12.39. (d) Are the high power engines really worse than the old type ? If so why ? Does it mean high power cyl. going out of round. We could check by running with pinned rings. (e) Can… | ||
| scan0175 | Plating recommendations for C.I. liners to be cast in aluminium brake drums. | ||
| View original record | 1129 To Rm. from Rm/GB. Copy to Rm/MHR. Rm/GB.7/ET.3.1.41. Mr. Gresham was asked for advice on the best plating for C.I. liners, which are to be cast in aluminium brake drums. Mr. Gresham's first… | ||
| scan0176 | Letter from The Stainless Spinning Works confirming the despatch of Plate Springs RG.2909. | ||
| View original record | Rh 1129. (Chassis) NORTHERN 2789. AIR MINISTRY APPROVED REF. No. 500673/36. 230 THE STAINLESS SPINNING WORKS, YOUR REF. Rm/MHR.56. GT. HAMPTON STREET. OUR REF. EPB/EAE. BIRMINGHAM. 18. 26th Feb. 1942.… | ||
| scan0177 | Short typed message regarding an arrival by road at a specific time. | ||
| View original record | 1129. 1204(?) Rm/YH 15/3/40. NIPSA BURY ARRIVING 11.45 BY ROAD ROBOTHAM ROYCAR | ||
| scan0178 | Message to NIPSA in Bury, Lancashire, arranging a meeting to discuss engine design problems. | ||
| View original record | 112a 14.5.40. NIPSA. BURY. LANCS. WOULD FRIDAY BE CONVENIENT TO DISCUSS DESIGN PROBLEMS IN CONNECTION WITH THE ENGINE WE HAVE SENT TO YOU. ROBOTHAM. ROYCAR. | ||
| scan0179 | Brief typed telex message arranging a meeting for the following Friday. | ||
| View original record | 1129 5.6.40. NIPSA. BURY. IS IT CONVENIENT FOR YOU TO SEE US ON FRIDAY NEXT. ROBOTHAM.ROYCAR. | ||
| scan0180 | Telegram confirming the arrival details for Mr. Robotham. | ||
| View original record | POST OFFICE TELEGRAM Charges to pay s. d. RECEIVED 1129 3/11/0 Prefix. Time handed in. Office of Origin and Service Instructions. Words. m 33 From: onRk 2.37 BURY MR 10 To: Wp ROYCAR DERBY Rm =… | ||
| scan0181 | Telegram received by telephone regarding an arrival for the attention of Robotham. | ||
| View original record | Phoned to Mrs Taylor R.R. 144A-10409 9-11-39 WHK ROLLS-ROYCE LTD. TELEGRAM RECEIVED BY TELEPHONE. Rm 1129 Time Received 4-0 Date 1-10-40 To Roycar 10wds By MH from Bury Manchester 234 Attention… | ||
| scan0182 | Telegram received by telephone confirming the arrival of Mr. Robotham. | ||
| View original record | R.R. 144A-10469 9-11-39 WHK ROLLS-ROYCE LTD. TELEGRAM RECEIVED BY TELEPHONE. Time Received: 4-0 Date: 1-10-40 To: Roycar 10wds By: MH from: Bury Manchester 2.34 Message: Attention Robotham arrives 10.… | ||
| scan0183 | Technical report on Mercedes Benz dry cylinder liners. | ||
| View original record | Rm/HH. What is the thickness of our B80 dry-liners FILE Gm .125 Holo MERCEDES BENZ DRY CYLINDER LINERS. The 6 dry liners are screwed into the cylinder block which is integral with the cylinder head.… | ||
| scan0184 | Sketch of a Mercedes-Benz dry liner with dimensions and material hardness. | ||
| View original record | SKETCH of MERCEDES-BENZ DRY LINER Roneo 3.X.40 PL367 .035 5.875 BRINELL OF LINER 255 7.0 CTS 7.1 MIDDLE PAR 14 THDS PER 1" | ||
| scan0185 | Advantages and disadvantages of two types of high power cylinder heads. | ||
| View original record | 9/129A COPY. Jnr. from Rm. C. to Rm/Wym. Rm/CTS. Rm.17ML.9.9.40. HIGH POWER CYLINDER HEADS. ------------------------- The conclusion I have come to with regard to the two types of cylinder head which… | ||
| scan0186 | Research into improving engine volumetric efficiency and power output. | ||
| View original record | Chassis engines General ? 1129 To: Jnr. from Rm. Rm. 3/h. 15.1.44. c. to FJH. c. to FJH/CTS. FLOW THROUGH HIGH POWER ENGINE INLET VALVE AND PORT. We have always been very disappointed with the power… | ||
| scan0187 | The creation of a separate file for letters concerning Aspin Cylinder Heads. | ||
| View original record | Letters re. Aspin Cylinder Heads taken out and made into separate file numbered 1129A. | ||
| scan0188 | Letter from F. M. Aspin & Co. Ltd. to W. A. Robotham regarding engine developments. | ||
| View original record | TELEPHONE—BURY 1554 TELEGRAMS— "NIPSA," BURY CABLES— " " WESTERN UNION "NIPSA" BURY F. M. ASPIN & CO. LTD. INTERNAL COMBUSTION ENGINES Chairman & Man'g Director— F. M. ASPIN Directors— T. B. ASPIN L.… | ||
| scan0189 | Letter declining an offer to convert a Bentley engine and putting the project on hold. | ||
| View original record | Rm. 7/h. 8th March, 1944. Dear Mr. Aspin, Thank you for your letter of the 28th February. I am much indebted to you for offering to undertake the conversion of the Bentley engine without manufacturing… | ||
| scan0190 | Letter from F. M. Aspin & Co. Ltd. to W. A. Robotham acknowledging a letter and offering to undertake a complete job. | ||
| View original record | TELEPHONE—BURY 1554 TELEGRAMS— "NIPSA," BURY CABLES— WESTERN UNION "NIPSA" BURY F. M. ASPIN & CO. LTD. INTERNAL ASPIN COMBUSTION ENGINES ELTON BURY LANCS. Chairman & Man'g Director— F. M. ASPIN… | ||
| scan0191 | Letter postponing work on the Aspin head experiment project for various reasons. | ||
| View original record | Rm. 5/h. 23rd February, 1944. Dear Aspin, Many thanks for your letter of the 5th February and your follow-up of the 21st. I am sorry that I have not replied before but I have been reviewing our… | ||
| scan0192 | Letter from F. M. Aspin & Co. Ltd. to W. A. Robotham regarding a previously sent letter and power curve. | ||
| View original record | TELEPHONE—BURY 1554 TELEGRAMS— ''NIPSA,'' BURY CABLES— WESTERN UNION ''NIPSA'' BURY F. M. ASPIN & CO. LTD. INTERNAL COMBUSTION ENGINES ELTON BURY LANCS. Chairman & Man'g Director— F. M. ASPIN… | ||
| scan0193 | Letter from F.M. Aspin & Co. discussing a cylinder head collaboration and engine performance metrics. | ||
| View original record | COPY. F.M. ASPIN & CO. LTD., ELTON, BURY, LANCS. FMA/PC 5th February, 1944. CONFIDENTIAL. W.A. Robotham, Esq., Messrs. Rolls-Royce Ltd., DERBY. Dear Mr. Robotham, I am in receipt of your letter of the… | ||
| scan0194 | Letter from F. M. Aspin & Co. Ltd. detailing engine performance after 1,000 power hours and a recent facility expansion. | ||
| View original record | - 2 - Engine has now completed 1,000 power hours, the performance being exactly the same as after 200 hours. I am looking forward to hearing from you in the near future when I would be pleased to… | ||
| scan0195 | Performance curve graph for an Engine Series TA6 6 Cylinder with atmospheric induction. | ||
| View original record | PERFORMANCE CURVE G.23 ASPIN ENGINE SERIES TA6 MADE UNDER ASPIN PATENTS 3 5/8" BORE x 4" STROKE - 6 CYLINDER ATMOSPHERIC INDUCTION B.H.P. B.M.E.P - R.P.M. B.H.P - R.P.M. TORQUE - R.P.M. FUEL… | ||
| scan0196 | Confidential letter to Maurice Platt of Vauxhall Motors regarding the Aspin head and valve development. | ||
| View original record | Confidential. Rm. 1/h. 21st February, 1944. Dear Platt, Thank you very much for your letter of the 14th February, regarding the Aspin head. This is very interesting, and I think confirms our views on… | ||
| scan0197 | Confidential letter from Vauxhall Motors discussing test results and failures of various Aspin project engines. | ||
| View original record | Vauxhall Motors Ltd LUTON BEDS. TELEGRAMS CARVAUX, TELEX, LUTON TELEPHONE NUMBER 2600 LUTON EXTENSION NO. 91 Handwritten Note: Rm/h ASPIN FILE!! WHEN REPLYING PLEASE QUOTE -> OUR REF. 289/MP/CS YOUR… | ||
| scan0198 | Report page detailing the performance, modifications, and issues with a converted Vauxhall Ten engine featuring an Aspin rotary valve head. | ||
| View original record | -2- The converted Vauxhall Ten engine, although designed by Aspin so far as the cylinder head was concerned, was also influenced by Alex Taub in that he was insistent that Aspin should attempt to use… | ||
| scan0199 | Concluding page of a letter detailing engine performance metrics and development work since 1940. | ||
| View original record | -3- run at full throttle without detonation. At a speed of 1,000 R.P.M. it gave an I.M.E.P. of 150.6 lbs/sq.in. and a B.M.E.P. of 113.1 lbs/sq.in. The engine was subsequently returned to Aspin. That… | ||
| scan0200 | Letter from F.M. Aspin & Co. Ltd. to W.A. Robotham discussing the manufacture and performance of a Cylinder Head. | ||
| View original record | F.M. ASPIN & CO. LTD. INTERNAL COMBUSTION ENGINES ELTON BURY ENGLAND TELEPHONE - BURY 1554 TELEGRAMS - "NIPSA" BURY CABLES - " " WESTERN UNION - "NIPSA" BURY Chairman and Managing Director. F. M.… | ||
| scan0201 | Continuation sheet of a letter from F. M. Aspin & Co. Ltd. discussing engine performance and company expansion. | ||
| View original record | Continuation Sheet No. 1. From F. M. Aspin & Co. Ltd., Bury. load and a cooling fan absorbing approximately 10 H.P. The barometer at the time was below normal and the temperature slightly above… | ||
| scan0202 | Performance curve graph for an Engine Series TA 6, a 6-cylinder engine with atmospheric induction. | ||
| View original record | PERFORMANCE CURVE G.29 ENGINE SERIES TA 6 MADE UNDER ASPIN PATENTS ASPIN 3 5/8" BORE x 4" STROKE - 6 CYLINDER ATMOSPHERIC INDUCTION B.H.P R.P.M B.M.E.P - R.P.M Max Min B.H.P - R.P.M Max Min TORQUE -… | ||
| scan0203 | Letter from Vauxhall Motors concerning tests on an Aspinized Vauxhall engine. | ||
| View original record | Vauxhall Motors Ltd LUTON BEDS. TELEGRAMS CARVAUX, TELEX, LUTON TELEPHONE NUMBER 2600 LUTON EXTENSION NO. 91 WHEN REPLYING PLEASE QUOTE -> OUR REF. 289/MP/CS YOUR REF. Rm. 7/h 1st February, 1944 W.A.… | ||
| scan0204 | Letter to F.W. Aspin regarding a contract to develop an engine with an Aspin head for the Ministry of Supply. | ||
| View original record | confidential. Rm. 17/h. 31st January, 1944. Dear Aspin, You will remember that some time ago, we approached you with a view to fitting an Aspin head to an overhead camshaft engine which we had… | ||
| scan0205 | Secret letter to Maurice Platt of Vauxhall Motors requesting information on an engine produced with Aspin's valve gear. | ||
| View original record | SECRET. 29th January, 1944. Rm. 7/h. Dear Platt, I understand from Aspin that, prior to the war, he produced a complete engine for you with his valve gear. Whilst I have never been in any way able to… | ||
| scan0206 | Letter from Briggs Motor Bodies Limited to W. A. Robotham congratulating him on an appointment and discussing the Aspin Engine. | ||
| View original record | BRIGGS MOTOR BODIES LIMITED DIRECTORS: SIR ALLAN POWELL, C.B.E., CHAIRMAN. N. H. MANNING, (U.S.A., BRITISH ORIGIN), MANAGING DIRECTOR. W. O. BRIGGS, (U.S.A.) W. P. BROWN, (U.S.A.) W. D. ROBINSON,… | ||
| scan0207 | Graph and diagrams comparing two-stroke engine valve opening areas for various valve designs. | ||
| View original record | TITLE: TWO STROKE VALVE OPENING AREAS Y-AXIS LABEL: AREA OF VALVE OPENING. []" X-AXIS LABEL: CRANKSHAFT DEG's. B.D.C GRAPH CURVES: - MR WOOD'S SLEEVE VALVE EXHAUST - KADENACY POPPET EX. - ENGINE SPEED… | ||
| scan0208 | Letter from F.M. Aspin & Co. Ltd. requesting a review of a Centrifugal Supercharger design. | ||
| View original record | Single cylinders TELEPHONE - BURY 1554 TELEGRAMS - "NIPSA" BURY CABLES - " " WESTERN UNION "NIPSA" BURY F. M. ASPIN & CO. LTD. INTERNAL COMBUSTION ENGINES ELTON BURY ENGLAND Chairman and Managing… | ||
| scan0209 | Letter from F.M. Aspin & Co. Ltd. discussing job specifications, drawings, and cost estimates for cylinder components. | ||
| View original record | Please return to Miss Candes JNR - TELEPHONE - BURY 1554 TELEGRAMS - "NIPSA" BURY CABLES - " " WESTERN UNION "NIPSA" BURY F. M. ASPIN & CO. LTD. Chairman and Managing Director. F. M. ASPIN Directors-… | ||
| scan0210 | Letter declining to disclose development work on centrifugal superchargers. | ||
| View original record | Rp.S/ML. F.M.Aspin,Esq., Messrs F.M.Aspin & Co.Ltd., ELTON. Bury. Dear Mr. Aspin, CENTRIFUGAL SUPERCHARGERS. Thank you for your letter of the 16th. October. On going into the matter I find that we are… | ||
| scan0211 | Letter from F.M. Aspin & Co. Ltd. returning an inadvertently taken Visitor's Pass. | ||
| View original record | 1129 TELEPHONE - BURY 1554 F. M. ASPIN & CO. LTD. INTERNAL COMBUSTION ENGINES Chairman and Managing Director. F. M. ASPIN Directors. T. B. ASPIN W. R. CHOWN L. CLOUGH E. RIDDEL G. E. VARLEY YOUR REF… | ||
| scan0212 | Requesting the location of a pattern to modify a cylinder block for Aspin's cylinder head. | ||
| View original record | Rm/CTS. from Rm. File Single cylinder engine Rm.7/ML.25.9.40. or Tuesday next week. Aspin is coming on Monday Before he arrives will you please let me know whether you can locate the pattern from… | ||
| scan0213 | Agreement to fit an Aspin head to an overhead camshaft Bentley engine. | ||
| View original record | File Single cylinder file (!) To: "JNR" o: "CTS". re Aspin Valve. We have now got an agreement from "Hs" that we can now authorise Aspin to put one of his heads on the overhead camshaft Bentley… | ||
| scan0214 | Patent inquiry for a principle applying acceleration and deceleration to a rotary valve. | ||
| View original record | NW. from Rm. 1129 Rm.1/ML.10.7.40. Herewith PL.278, showing a simple means of applying acceleration and deceleration to a rotary valve. We shall be interested to know whether a patent can be obtained… | ||
| scan0215 | Letter from F.M. Aspin & Co. Ltd. acknowledging receipt of a letter and diagram, promising an attractive proposition. | ||
| View original record | 1129. TELEPHONE - BURY 1554 TELEGRAMS - "NIPSA" BURY CABLES - " " WESTERN UNION "NIPSA" BURY F. M. ASPIN & CO. LTD. Chairman and Managing Director F. M. ASPIN Directors T.B. ASPIN W.R. CROWN L. CLOUGH… | ||
| scan0216 | From Rm. to Jnr. discussing a review of the Aspin valve and its potential for engine designs. | ||
| View original record | Jnr. from Rm. Rm.9/ML.8.7.40. Your review of the Aspin valve is extremely interesting. I cannot understand why the figure for Wood's engine should be so much better than any other sleeve valve engine… | ||
| scan0217 | Design, performance and mechanical limitations of the Aspin rotary valve. | ||
| View original record | 1129 To Rm. Jnr.1/JH.6.7.40. Aspin Valve. The further drawings I have made I think answers all your questions in memo. Rm.14/ML.21.6.40. PL.275 shows the largest valve possible for a given cylinder… | ||
| scan0218 | Letter to F. M. Aspin & Co. Ltd. discussing attempts to determine the orifice coefficient of a valve and port. | ||
| View original record | 1129 Rm.5/JMS. 3.7.40. F. M. Aspin, Esq., Messrs. F. M. Aspin & Co. Ltd., ELTON, Bury. Dear Mr. Aspin, Thank you for your letter of June 29th. Though we have made several attempts to determine the… | ||
| scan0219 | Letter from F.M. Aspin & Co. discussing port design and proposing a flow measurement test against poppet valves. | ||
| View original record | 1129 TELEPHONE - BURY 1554 TELEGRAMS - "NIPSA" BURY CABLES - " " WESTERN UNION "NIPSA" BURY F.M. ASPIN & CO. LTD. INTERNAL COMBUSTION ENGINES ELTON BURY ENGLAND Chairman and Managing Director. F.M.… | ||
| scan0220 | Continuation sheet of a letter from F. M. Aspin & Co. Ltd. requesting information. | ||
| View original record | Continuation Sheet No. 1. From F. M. Aspin & Co. Ltd., Bury. 29th June, 1940. W. A. Robotham, Esq., Messrs. Rolls-Royce, Ltd., DERBY. Trusting that you will supply us with the information required at… | ||
| scan0221 | Graph comparing poppet valve and Aspin engine port areas against timing angle in degrees. | ||
| View original record | DES. 8874 A. PORT AREA D' ASPIN PROPOSAL 14/11/40 FOR 5.4 ENGINE VERTICAL INCREASE OF PORT BY 25% ASPIN INLET & EXHAUST EXE 'DC' EXHAUST SCALED UP TO MERLIN THROAT AREA 4.500 D' THROAT AREA 3.310 D'… | ||
| scan0222 | Aspin valve design, its poor volumetric efficiency, and potential use in 2-stroke engines. | ||
| View original record | Ds. from Rm. c. Wd. c. Jnr. c. Rg. file 1129 Rm.2/10./28.6.40. Herewith a copy of a blueprint which started in your Department and to which we have added various pieces of information as it has been… | ||
| scan0223 | Letter to Mr. Aspin comparing the breathing capacity of his Aspin valve to a standard poppet valve for aviation engines. | ||
| View original record | Rm: ROUGH COPY AS REQUESTED. Dear Mr. Aspin, Thank you for your letter of June 14th. We have now compared the valve opening diagram which we are getting on our existing up-to-date engines with your… | ||
| scan0224 | Letter to F.M. Aspin comparing the breathing capacity of his Aspin valve against the standard poppet valve for aviation engines. | ||
| View original record | Rm.6/JMS. 28.6.40. F. M. Aspin, Esq., Messrs. F. M. Aspin & Co. Ltd., Elton, BURY. Dear Mr. Aspin, Thank you for your letter of June 14th. We have now compared the valve opening diagram which we are… | ||
| scan0225 | Valve timing and design characteristics for the Aspin valve engine. | ||
| View original record | Jnr. from Rm. Rm.14/ML.21.6.40. ASPIN VALVE. With reference to Jnr.5/JH.18.6.40. the overlap which you show on the Aspin engine will not give poor low speed torque, but is likely to upset the idling.… | ||
| scan0226 | Comparing the Aspin engine's valve timing and performance against the B.60 and Merlin engines. | ||
| View original record | To Rm. Aspin Engine. Your reference Rm.14/ML.10.6.40. On PL.249 herewith I have shown the inlet valve opening areas for the Aspin compared with B.60 In order to be accurate I have assumed that we have… | ||
| scan0227 | Letter from F.M. Aspin & Co. Ltd. enclosing drawing No. C.144 for engine porting and discussing experimental work. | ||
| View original record | TELEPHONE-BURY 1554 TELEGRAMS-"NIPSA" BURY CABLES-WESTERN UNION "NIPSA" BURY F. M. ASPIN & CO. LTD. INTERNAL COMBUSTION ENGINES ELTON BURY ENGLAND Chairman and Managing Director: F. M. ASPIN… | ||
| scan0228 | Letter from F.M. Aspin to W.A. Robotham discussing a drawing for engine porting and a valve opening diagram. | ||
| View original record | COPY FOR FILE. 1129 Original passed to Jnr. with note from Rm. to include same in valve opening diagram analysis. FROM: Aspin. Elton. Bury. FMA/AG 14.6.40. W.A.Robotham.Esq., R.R.Derby. Dear Mr.… | ||
| scan0229 | Comparison of valve port areas for various engines, including the Aspin valve and the B.60. | ||
| View original record | Jnr. from Rm. 1129. Rm.14/ML.10.6.40. Here is DES.8874 showing the valve port area of various engines. We should like to get a direct comparison, with our timing, of the Aspin valve opening, against… | ||
| scan0230 | Letter to Mr. F. Aspin cancelling a visit and halting development work due to the serious situation in France. | ||
| View original record | Rm.9/ML. F.Aspin,Esq., Experimental Laboratories, Elton, Bury. 24.5.40. Dear Mr. Aspin, Thank you for your letter of 23rd. May. together with the photograph of your valve, which is of considerable… | ||
| scan0231 | Cover letter from F. M. Aspin & Co. Ltd. regarding a print of a rotor from an engine. | ||
| View original record | 1129 TELEPHONE - BURY 1554 TELEGRAMS - "NIPSA" BURY CABLES - " WESTERN UNION "NIPSA" BURY F. M. ASPIN & CO. LTD. INTERNAL COMBUSTION ENGINES ELTON BURY ENGLAND Chairman and Managing Director. F. M.… | ||
| scan0232 | Photograph showing a rotor taken from a 4 1/8' bore by 6' stroke engine. | ||
| View original record | Rotor taken from 4 1/8" bore by 6" stroke engine after approximately 1,000 hours running | ||
| scan0233 | Design work, challenges, and questions regarding the Aspin engine. | ||
| View original record | C.T.C 1129 Please discuss with me Rms To Rm. Lnr.10/JH.17.5.40. File ASPIN ENGINE. The design work that Fletcher has done on the aero side is interesting. He has plotted a diagram for the inlet valve… | ||
| scan0234 | List of questions and observations regarding engine valve and spark plug performance. | ||
| View original record | -2- Jnr.10/JH.17.5.40. (5) Is the surface of the valve carbon concious? (6) What fails when the engine is put on detonation tests. (7) Starting and tick over. (8) The cooling of the spark plug appears… | ||
| scan0235 | Declining research on the Aspin Valve Gear due to existing research commitments. | ||
| View original record | Rm. from Hs. Copy to Sg. E. Rg. Wd. Lr. Lr/Lov. 1129 Hs.2/T.16.5.40. Aspin Engine. Referring to your memo Rm.1/ML.1.5.40, I cannot agree that we should start any research on the Aspin Valve Gear. I… | ||
| scan0236 | Visit to Aspin regarding engine conversion, design issues with cylinder stud positioning, and a new layout at Blounts Mill. | ||
| View original record | Unr. from Rm. 11D9 Rm.12/ML.15.5.40. The visit to Aspin has now been provisionally arranged for Wednesday of next week. He has received the overhead camshaft engine and has got out provisional schemes… | ||
| scan0237 | Letter from F.M. Aspin & Co. Ltd. to W. A. Robotham regarding a 6-cylinder engine and research into 2 and 4-cycle engines. | ||
| View original record | 1129 TELEPHONE - BURY 1554 TELEGRAMS - "NIPSA" BURY CABLES - " WESTERN UNION "NIPSA" BURY F. M. ASPIN & CO. LTD. INTERNAL COMBUSTION ENGINES ELTON BURY ENGLAND Chairman and Managing Director. F. M.… | ||
| scan0238 | Letter from F.M. Aspin & Co. Ltd. regarding the fitting of an 'Aspin' cylinder head. | ||
| View original record | 1129 TELEPHONE – BURY 1554 TELEGRAMS – “NIPSA” BURY CABLES – WESTERN UNION “NIPSA” BURY F. M. ASPIN & CO. LTD. INTERNAL COMBUSTION ENGINES ELTON BURY ENGLAND Chairman, and Managing Director: F. M.… | ||
| scan0239 | Proposal for testing the Aspin valve for reliability and antidetonating qualities on a Bentley engine. | ||
| View original record | - 5 - Cont'd. to make it at least square, if not a larger bore than stroke, since this will improve the breathing, the combustion chamber remains compact and there are no limitations due to inertia of… | ||
| scan0240 | Sending a B.23 O.H.C. conversion unit to Messrs Aspin for conversion to their rotary valve design. | ||
| View original record | To HPS from Rm/CTS. c. HPS/RH. Rm/CTS.1/ML.30.4.40. B.23 UNIT. ( O.H.C. CONVERSION. ) The above development unit has been stored at Shardlow for some months and, as is inevitable, certain pieces are… | ||
| scan0241 | Letter detailing the proposal to use a 4.25 litre Bentley engine for research on a new valve application. | ||
| View original record | 1129 Experimental Dept., Rm.1/ML./CTS. 27.4.40. F.M.Aspin,Esq., Elton, Bury. Dear Sir, With further reference to the application of your valve to one of our chassis engines. We have found a suitable… | ||
| scan0242 | Outlining general conclusions from a discussion about the design of a single-cylinder engine unit and its adaptation for an Aspin cylinder head. | ||
| View original record | Rm. c to Rm/CTS. 1129 Rm/Ed.3/GH.23.4.40. re SINGLE CYLINDER UNIT. In a discussion with Rm/CTS. regarding the above unit and its adaptation to take the Aspin cylinder head and valve gear, the… | ||
| scan0243 | Page 2 of a design specification memo discussing auxiliary pumps and a standard single-cylinder unit. | ||
| View original record | - 2 - Rm/Ed.3/GH.23.4.40. Continued:- (h) An auxiliary drive should be provided to allow a fuel pump to be fitted if required. 2 or 4-stroke requirements could probably be met by modifications to the… | ||
| scan0244 | Letter concerning single-cylinder tests and development work on the Aspin engine. | ||
| View original record | 1129 Lr. from Rm. c. Lr/Lov. c. Rm/CTS. Rm.14/ML.19.4.40. ASPIN ENGINE. We understand you are contemplating running some single cylinder tests on the Aspin engine. As you know, we contacted Aspin some… | ||
| scan0245 | Letter from F. M. Aspin & Co. Ltd. discussing a delay in providing valve area figures and arranging a visit. | ||
| View original record | 1129 TELEPHONE - BURY 1554 TELEGRAMS - "NIPSA" BURY CABLES - " " WESTERN UNION "NIPSA" BURY F. M. ASPIN & CO. LTD. INTERNAL COMBUSTION ENGINES ELTON BURY ENGLAND Chairman, and Managing Director. F. M.… | ||
| scan0246 | Letter to F.M. Aspin regarding the Aspin engine, rotary valve development, and single cylinder units. | ||
| View original record | 1129 Rm.9/ML. 15.4.40. F.M.Aspin, Esq., Elton, Bury. Dear Mr. Aspin, Thank you for your letter of 6th. April. The information contained therein was most useful. I would still like the valve area over… | ||
| scan0247 | Letter from F.M. Aspin & Co. Ltd. to W.A. Robotham discussing engine performance, fuel specifications, and compression ratios. | ||
| View original record | 1129 TELEPHONE - BURY 1554 TELEGRAMS - "NIPSA" BURY CABLES - " " " WESTERN UNION "NIPSA" BURY F. M. ASPIN & CO. LTD. Chairman and Managing Director. F. M. ASPIN Directors- T. B. ASPIN W. R. CHOWN L.… | ||
| scan0248 | Letter detailing engine compression pressures, testing apparatus, and various valve timing specifications. | ||
| View original record | Continuation Sheet No. 1. From F. M. Aspin & Co. Ltd., Bury. W.A. Robotham, Esq., Rolls-Royce Ltd., DERBY. 6th. April, 1940. is between 800 and 900 R.P.M. Therefore, the maximum compression pressure… | ||
| scan0249 | Continuation of a letter from F. M. Aspin & Co. Ltd. discussing gas engine test results and fuel consumption. | ||
| View original record | Continuation Sheet No. 2. From F. M. Aspin & Co. Ltd., Bury. 6th. April, 1940. W.A. Robotham, Esq., Rolls-Royce Ltd., DERBY. which we obtained in the gas engine. This is definitely on account of the… | ||