Rolls-Royce Archives
| Identifier | Entry | ||
| scan0001 | Standardisation document for deleting the starter carburetter jet in the induction pipe. | ||
| View original record | RR 755 (10H) (3-7-30) BM. 6/2571. x5280. COMPLETED 30.3.31. STANDARDISATION of CHASSIS PARTS. Date 16.1.31. Description of Parts. Starter Carburetter Jet in Induction Pipe, deleted. Origin. To obtain… | ||
| scan0002 | Introduction of a new part for the 'T' Series chassis, including test date and costs. | ||
| View original record | STANDARDISATION OF CHASSIS PARTS The number of the first chassis on which the new part will be fitted. 'T' Series. Date when chassis will be handed to test. 9.4.31. Cost of scraped material, if any.… | ||
| scan0003 | Single versus double carburetter configurations for 6-cylinder engines. | ||
| View original record | HS. E.) FROM R. BY. [illegible] (At Le Canadel.) Copy to - SG. Copy to - WGR. Copy to - RG. CARBURETTERS - 6 CYL. ENGINES. X8080 R2/M1.2.31. X. 7080 X. 5080. I understood that we must use double… | ||
| scan0004 | Preliminary arrangement for the Japan 3 induction system, referencing drawing LeC. 2881. | ||
| View original record | R. FROM E. C. to SG. WOR. C. to HS. BY. HY. X5080 E2/M5.3.31. JAPAN 3. INDUCTION SYSTEM. x.5070. X.5080. Please find herewith a print of LeC. 2881, shewing a preliminary arrangement of the above made… | ||
| scan0005 | Experiments to improve fuel distribution with a downdraught carburetter. | ||
| View original record | X5080 To R. From Hs/Lov. c. to SG. kor. c. to E. Da. c. to Sy. Hs/Lov.1/KT.2.4.31. 87080 X5080 DISTRIBUTION WITH DOWNDRAUGHT CARBURETTER As previously reported the distribution with the Downdraught… | ||
| scan0006 | Progress on double carburetters, a new pump scheme, and issues with cornering. | ||
| View original record | X5080 E. HS/LOV. ) FROM R. BY. ) (AT Le Canadel.) R2/M9.4.31. Copy to - SG. WOR. CAR CARBURETTERS. X.7080. X.5080. Mr. Lovesey seems to be getting on well with double carburetters. We are glad to hear… | ||
| scan0007 | Alterations to the P.2. double carburetter to fix issues and proposing future developments. | ||
| View original record | X5080 Hs. } FROM R. Ev. } R2/M4.5.31. c. Sg. Wor. E. DOUBLE CARBURETTER P.2. AND J.1. X.7080 X.5080. The alterations to P.2. to prevent the cutting out effect and flooding at the corners has been… | ||
| scan0008 | Request to detail an induction pipe for a Zenith 36 D.U.P. twin-choke carburetter to be tested on a 25 HP engine. | ||
| View original record | Copy X5080 To By. From Hs/Lov. HS/Lov.4/MJ.8.5.31. X1053. INDUCTION PIPE FOR 25 HP. We wish to try out a Zenith 36 D.U.P. twin choke carburetter on the 25 HP. We have received from the Zenith Co., a… | ||
| scan0009 | Carburettor design choices for the 25HP 'Future Japan ls' model. | ||
| View original record | X5080 HS. } FROM R. HY. } c. Sg. Wor. c. HV. RHC. R7/M28.5.31. 25HP. - FUTURE JAPAN ls. X.5770 X.5080. At the moment the head is being drawn. A special feature is the easier machining of the… | ||
| scan0010 | Petrol supply design for single carburetters intended for Japan. | ||
| View original record | To E. From Hs/Lov. 5080 Hs/Lov.5/MJ.3.6.31. SINGLE CARBURETTERS FOR JAPAN 1. X.5080. In reply to your memo of the 2nd.inst., we do not think it is at all necessary in the case of the car engines to… | ||
| scan0011 | Modifications to a carburetter and induction pipe, and checking availability for fitting to a different model. | ||
| View original record | X5080. To R. Matthews. From Hs/Rm. Hs/Rm.4/KT.22.6.31. X.5080. X.5070. The carburetter and induction pipe now on 16.C.IV. were modified as follows :- Inlet Pipe - LOP.E.55051. Existing Nozzle E.55043… | ||
| scan0012 | Request to modify a carburetter according to attached blueprints. | ||
| View original record | Y5080. To RHC. From Hs/Rm. Hs/Rm.4/KT.23.6.31. Will you please modify the carburetter, which we hand you herewith, to blueprints V730, 731, and 732. attached. Hs/Rm. | ||
| scan0013 | Blueprint of a modified L.S.C. Choke for the China Engine. | ||
| View original record | V730 .340 QTR. .360 RAD .850 DIA. ±5 .453 DIA. ±2 FOR ALL OTHER DIMENSIONS SEE E51761. MODIFIED L.S.C. CHOKE (CHINA ENGINE) SCALE ½. W.R.P 31-10-29 | ||
| scan0014 | Blueprint for a Modified H.S. Choke for China. | ||
| View original record | V731. FOR ALL OTHER DIMENSIONS SEE E51760. SCALE 1/1. MODIFIED H.S. CHOKE (CHINA). .723 ±2 DIA. .350 RAD. .350 CTR. JRD 24.10.29 | ||
| scan0015 | Blueprint drawing of a modified suction chamber for China. | ||
| View original record | V732, 1.650 ±5, .726 ±5, .450 ±5, 1.150 ±5, SCALE ½., FOR ALL OTHER DIMENSIONS SEE F53021., MODIFIED SUCTION CHAMBER (CHINA)., APR, 31-3-40 | ||
| scan0016 | Design and adaptation of a carburetter from a J.2 engine to a J.3 engine. | ||
| View original record | Y5080. By. from E. c. Sg. Wor. Hs. E1/M29.6.31. J.3. CARBURETTER. X.5080 We send herewith LeC.2924 showing the design for the above. This carburetter was originally designed for J.2. but is… | ||
| scan0017 | Analysing the results of four different carburetter arrangements on Phantom II and 25 HP engines. | ||
| View original record | To E. from Hs/Rm. 85080. Hs/Rml1/AD7.7.31. CARBURETTER ARRANGEMENTS P.II. AND 25 HP. 8080 Further to our 'phone conversation, herewith a curve shewing some results. We used the 114° R. shaft as it… | ||
| scan0018 | Engine performance, addressing M.E.P., ramming, carburation options, and issues with detonation and roughness. | ||
| View original record | -2- Superficially one would say that we shall then get better low speed M.E.P. than with the carbs. close to the engine and nearly the same top H.P. Summarising the results, it would seem that there… | ||
| scan0019 | Engine performance analysis, testing results, and future development work on different engine configurations. | ||
| View original record | Hs/Rmll/AD7.7.31. contd. -3- does not give us more power and we believe possibly less, due to the cramped arrangement of the valves, but we are proving this out. It is heavier due to its greater… | ||
| scan0020 | Performance comparison graph of four different carburetor arrangements on a Phantom II engine with a 4.9 C/R aluminum head. | ||
| View original record | Hs 411 COMPARISON OF VARIOUS CARB. ARRANGEMENTS P II 4.9 C/R ALUM HEAD. ① TWO S.U'S. PIPE ABOVE ② AS ① BUT PIPES JOINED TOGETHER CENTRALLY WITH THROUGH BORE. ③ TWIN RR CARB. 1.4 DIA. CHOKES ④ SINGLE… | ||
| scan0021 | Single versus twin carburetter setups for the Phantom model, including designs for Japan. | ||
| View original record | HS. FROM R. C. to SG. WOR. BY. X5080 R4/M8.7.31. (SENT OFF 11.7.31.) X.7080 X.5080 PHANTOM & JAPAN TWIN CARBURETTERS. With reference to the single carburetters we have already sent you for Japan,… | ||
| scan0022 | Results of experiments on different carburetter positioning arrangements for a car engine. | ||
| View original record | To R. From Hs/Rm. c. to Sg. Wor. c. to Da. E. c. to By. We have been conducting various experiments on the positioning of carburetters with a view to determining the best all round arrangement for a… | ||
| scan0023 | Tests and comparisons of Claudel and Zenith carburettors. | ||
| View original record | -2- Hs/Rm.6/MJ.11.7.31.Cont'd. Arrangement (4) - Does not seem to have any particular merit as it eliminates ramming completely and whilst producing no more top HP. gives a very poor low speed M.E.P.… | ||
| scan0024 | Technical note on the performance and application of S.U. carburetters, with a comparison to Bentley's setup. | ||
| View original record | -3- Hs/Rm.6/MJ.11.7.31.Cont'd. S.U.CARBURETTERS. The S.U's. in spite of being a fixed jet carburetter, seem to break up the fuel stream very well. This of course is a feat feature of the expanding… | ||
| scan0025 | Performance comparison graph of different carburetter arrangements for a 25 HP engine. | ||
| View original record | SHEET I HS. 413. COMPARISON OF CARBURETTER ARRANGEMENTS FOR 25 HP. JAPAN UNIT IV. G.8. 5.45 C/R. OPEN EXHAUST Nº I TWO CLAUDELS. M.M. CHOKES. 25 INDUCTION AS SHOWN Nº II TWO 36. VI. ZENITH. CHOKES 25… | ||
| scan0026 | Graph comparing the performance of various carburetor arrangements on a Phantom II 4.9 C/R engine with an aluminum head. | ||
| View original record | SHEET II Hs 411 COMPARISON OF VARIOUS CARB. ARRANGEMENTS P II 4.9 C/R ALUM HEAD. ① TWO S.U'S. PIPE ABOVE ② AS ① BUT PIPES JOINED TOGETHER CENTRALLY WITH THROUGH BORE ③ TWIN R.R. CARB. 1.4 DIA CHOKES ④… | ||
| scan0027 | Different carburetter configurations for a 6-cylinder car. | ||
| View original record | X5080 HS. FROM R. RL/M13.7.31. C. to SG+ WOR+ C. to BY. E. CARBURETTERS. X. 7080 X. 5080 On the subject of car carburetters we appear to have several different opinions, so I am trying to clear it up… | ||
| scan0028 | Carburetter performance tests at Brooklands comparing standard and S.U. carburetters with different bonnets and jet settings. | ||
| View original record | 85080. COPY. To Hs/Rm. from F.Dodd. 6.8.31. X.788. X.1487. CARBURETTER TESTS AT BROOKLANDS ON 12-GIV.X.5080 Standard carburetter with louvred bonnet. Air Temp. | Water Temp. | Lap time | Lap Speed… | ||
| scan0029 | Performance and petrol consumption test data for an S.U. carburetter with strong and weak mixtures. | ||
| View original record | -2- S.U. Carburetter with plain bonnet. Strong mixture. Air Temp. Water Temp. Lap Time Lap Speed MPH. 1/2 Lap mile time 1/2 Lap mile speed. 20º 84.5º 2-26.8 67.85 20º 84.5º 2-26.6 67.94 S.U.… | ||
| scan0030 | Performance test data for car 12-GIV at Brooklands, comparing carburetter and bonnet configurations. | ||
| View original record | X5080. To Hs/Rm. from F.Dodd. 13.8.31. X.788. X.1487. X.5080. 12-GIV AT BROOKLANDS. S.U. Carburetter - louvred bonnet (cut out closed). Air Temp. Water Temp. Lap Time Lap Speed MPH. 1/2 Lap mile Time… | ||
| scan0031 | From 'R.' discussing the potential change of carburetters and the need for personal testing of a new S.U. specimen. | ||
| View original record | X5080 HS. FROM R. R3/M20.8.31. C. to SG. WOR. BY. re. CARBURETTERS. X. 7080 X. 5080. You will realise that we have been going extremely well with out old carburetter - for our type of car - for a… | ||
| scan0032 | Outlining requirements and considerations for carburetter design and performance. | ||
| View original record | HS. FROM R. C. to SG. WOR. C+ to BY. HS/LOV. P.2. CARBURETTERS Y5080 R2/M25.8.31. X.7080. C.5080. THE TWIN CARBURETTER WHICH YOU HAVE. This has been corrected; what is the best it will do? 25HP+.… | ||
| scan0033 | Heating systems and carburation for cars intended for cold climates like the USA. | ||
| View original record | -2- (12) Again we understand that for USA. and other very cold winter climates we must have good cold distribution - rapid heating by exhaust. Our requirements would not be met by S.U. or Bentley… | ||
| scan0034 | Drawings for an induction system for the J.1 and J.3 models, covering carburetters and pipes. | ||
| View original record | X 5080 BY. FROM E. C. to SG. WOR. HS. E1/M12.9.31. X.5070. X.5080. J. 1. - INDUCTION SYSTEM. ----- Last Sat. we sent you the originals of LeC. 2919. and 2945., the first shewing the induction pipe it… | ||
| scan0035 | Technical discussion on the relative merits and development of different carburetter types for car and aero work. | ||
| View original record | COPY. Y5080. HS. } FROM R. BY. } R4/M28.9.31. (X7080 (X5080 C. to SG. WOR. E. CARBURATION. After considerable trials and experiments with double carburetters with fixed throats, it has been agreed… | ||
| scan0036 | Analysis of 25 HP engine power output in relation to increasing valve lift and inlet valve clearance. | ||
| View original record | COPY. X5080. To E. From Hs/Rm. Hs/Rm.2/AD5.10.31. X.5771 X.5090. X.5080. 25 HP. POWER OUTPUT. Increasing Valve Lift. We have been analysing the curves on increased valve lift. RM.44 These Curves shew… | ||
| scan0037 | Performance graph comparing high and low lift rockers, showing BHP and BMEP against RPM. | ||
| View original record | COMPARISON OF HIGH & LOW LIFT ROCKERS WITH SINGLE CARB: JAPAN UNIT INLET VALVE DIA 1·4. C/R 5·13/1 OPEN EX. 112° CAMSHAFT E 55640 CLCE (MIN) OF ·225 MACHINED ROUND INLET VALVE VALVE LIFT ·344 VALVE… | ||
| scan0038 | Comparison of high and low lift rockers with twin Zenith carburettors for the Japan Unit engine. | ||
| View original record | R.M.44 COMPARISON OF HIGH & LOW LIFT ROCKERS, WITH TWIN ZENITH CARBS. JAPAN UNIT. INLET VALVE DIA 1.4, OPEN EXHAUST 1 1/2", CAMSHAFT F55640 CHART A: LIFT .395 LIFT .344 COMP. RATIO 5.35/1 TIMING TOO… | ||
| scan0039 | Performance comparison graph of high and low lift rockers with ramming, for different valve and timing configurations. | ||
| View original record | R.M.145 COMPARISON OF HIGH & LOW LIFT ROCKERS WITH RAMMING CLAUDEL CARBS. JAPAN A. C/R 5.15 HEAD MACHINED TO GIVE .125 CLCE ROUND INLET VALVE BEST TIMING FOR POWER 112° CAMSHAFT VALVE LIFT .395 VALVE… | ||
| scan0040 | Graphs showing the effect of increasing valve clearance on engine performance. | ||
| View original record | R.M. 46 EFFECT OF INCREASING CLEARANCE ROUND INLET VALVE JAPAN OPEN EXHAUST 112° CAMSHAFT E.55640 .344 VALVE LIFT 2 CLAUDELS 26 M/M CHOKES RAMMING PIPES COMPRESSION RATIO 5.35 B.H.P. M.E.P. LBS/SQ.IN.… | ||
| scan0041 | Graph showing the effect of increasing clearance around the inlet valve on engine performance with twin Zenith carburettors. | ||
| View original record | R.M.47 EFFECT OF INCREASING CLEARANCE ROUND INLET VALVE JAPAN ON TWIN ZENITH CARBS. OPEN EXHAUST 112° CAMSHAFT E.55640 1.4" DIA. INLET VALVES TIMING TOO EARLY FOR MAX. POWER C/R 5.35 VALVE LIFT .344… | ||
| scan0042 | Sketch showing modifications to a Japan cylinder head to increase clearance around the inlet valves. | ||
| View original record | BEFORE MACHINING INLET <- 1.500 DIA .150 1.000 Rd MOD HEAD .350 Rd 1.125 Rd SKETCH SHOWING MODIFICATIONS TO JAPAN CYLINDER HEAD TO GIVE INCREASED CLEARANCE ROUND INLET VALVES | ||
| scan0043 | Issuing a standardisation sheet for a spring-loaded control for the 20/25 HP starting carburetter. | ||
| View original record | Y5280 BY. From Hs/Lid. Hs/Lid.5/MJ.2.10.31. 20/25 HP. STARTING CARBURETTER. We are issuing a Standardisation Sheet for a spring loaded control to the 20/25 HP. car starting carburetter. Such a scheme… | ||
| scan0044 | Request to manufacture two adaptors to test new carburettors on the existing Japan engine. | ||
| View original record | RHC. from Hs/Rm. X5080. Hs/Rm.2/AD6.10.31. Will you please make two adaptors to the attached sketch V.1227 to enable us to test out the new carburetters to scheme LeC.2924 on the existing Japan… | ||
| scan0045 | Proposed spring control for the 25 HP starter carburetter and a resulting issue with starting the car by hand. | ||
| View original record | [Handwritten] X5280. To Sg. From Hs. c. to PN. c. to Wor. c. to By. Hs.3/MJ.14.10.31. X.5280. SPRING CONTROL FOR 25 HP. STARTER CARBURETTER. It was agreed at the last conference in Derby that we… | ||
| scan0046 | Pros and cons of a spring control for the 25 HP starter carburetter and its potential application to the 40/50 model. | ||
| View original record | X5280. X5280. To Hs. from Sg. Copy to PN. For. BY. Cx. re Spring Control for 25 HP Starter Carburetter. Sg12/E15.10.31 RECEIVED 1931 OCT 16 H I am in receipt of Hs.3/MJ.14.10.31. I quite appreciate… | ||
| scan0047 | Standardisation of a spring loaded control for the starting carburetter. | ||
| View original record | RR 788 (10H) (8459, 24-10-30) 6/3185. KS.80. COMPLETED 2. 32. STANDARDISATION of CHASSIS PARTS. Description of Parts. SPRING LOADED CONTROL FOR STARTING CARBURETTER. Origin. To prevent damage to… | ||
| scan0048 | Fitting of a new part to a 'J' series chassis, including tooling costs. | ||
| View original record | CHASSIS PARTS STANDARDISATION. XU. 3830 /D.6 13.1.30 The number of the first chassis on which the new part will be fitted.... 'J' series. Date when chassis will be handed to test...................… | ||
| scan0049 | Abandoning the S.U. carburetter and developing a new single, semi-expanding carburetter. | ||
| View original record | HS. FROM R. X5080 R2/M9.11.31. X1487 X7080 X5080 C. to SG. WOR. BY. CARBURETTERS. We want to depart from the very common S.U. pattern for various reasons. Amongst others the reputation of this pattern… | ||
| scan0050 | Experiments with different induction pipes and carburetters to improve fuel distribution and power output. | ||
| View original record | X5080 To R. From Hs/Rm. c. to Sg. Wor. c. to S. Da. c. to By. Hs/Rm.1/M.17.11.31. X5771 DISTRIBUTION AND POWER OUTPUT. J.1. You will recollect that we managed to obtain good power with a 1 7/8… | ||
| scan0051 | Carburetter and induction pipe performance tests, with a comparison table. | ||
| View original record | -2- Hs/Rm.1/MJ.17.11.31.Cont'd. the lower the depression at which the carburetter works (or larger the carburetter) the more critical the distribution becomes, and for this reason are very satisfied… | ||
| scan0052 | Power output graph for a 'China Unit' engine, detailing performance with a 112° camshaft and high lift rockers. | ||
| View original record | POWER OUTPUT CHINA UNIT C/R 5.65-1 RM. 51 112° CAMSHAFT INLET & EX: CAMS TO E.55358. HIGH LIFT ROCKERS. OPEN EXHAUST. INLET VALVE DIA 1.4 MIN CLCE ROUND INLET VALVE .225 1 7/8 S.U. ① CLAUDEL ② MIXTURE… | ||
| scan0053 | Photograph showing a close-up of an engine, highlighting the carburettor and ignition system with a ruler placed for scale. | ||
| View original record | IGNITION E 4 5 6 7 8 9 10 11 12 | ||
| scan0054 | Carburettor design, comparing double and single carburetter setups for various engines. | ||
| View original record | HS. FROM R. X5080 C. to SG. WOR. BY. R5/M16.11.31. Sent off 19.11.31. X7080 X5080 X1487 CARBURATION. We have for a long time understood that it is ad-visable with double carburetters to have some… | ||
| scan0055 | Technical drawing of an induction pipe for a 1.875 bore S.U. carburetter. | ||
| View original record | V1236. 2.750 2.200 HOT-SPOT FITTING SIMILAR TO THOSE ALREADY EXISTING .900 RAD. .675 RAD. 1.350 .200 CTS. 2.500 DIA IT IS IMPORTANT THAT THESE EDGES BE AS SHARP AS POSSIBLE USE EXISTING FLANGE ALL… | ||
| scan0056 | Dynamometer tests to determine power lost in the carburettor air silencer and the effect of exhaust system modifications. | ||
| View original record | COPY. X5080. 23.11.31. 20-EX DYNAMOMETER TESTS. X.5771. X.5080. X.5230. We give herewith results of test on the dynamometer the object of which was to determine the power lost in the carburetter air… | ||
| scan0057 | Graph showing power loss from a PII carburetter air silencer on a Standard Car - 20 EX. | ||
| View original record | PII CARBURETTER AIR SILENCER POWER LOSS STANDARD CAR - 20 EX B.H.P. (CORRECTED) AT ROAD WHEELS CUT OUT OPEN CUT OUT CLOSED STANDARD CARB' AIR SILENCER AIR SILENCER OFF COMPLETE ALL INNER TUBES OUT OF… | ||
| scan0058 | Carburetion, concluding a single carburetter is preferable to a dual setup for a 6-cylinder engine. | ||
| View original record | X6090 HS. FROM R. R10/M28.11.31. Sent off 1.12.31. C. to SG. WOR. BY. P. 2. & J. 3. - CARBURETION. X.7080 X.5080 It is now pretty definitely established that we must have a through pipe for all the 6… | ||
| scan0059 | Letter discussing the 'Japan lll' carburetter design and enclosing a blueprint for modifying the 'Phantom ll' carburetter. | ||
| View original record | c. Hs. X5080. BY.16/G.3.12.31. JAPAN lll - CARBURETTER. ------------------------- We are sending you herewith print of Sch. 1560 for Japan lll carburetter and induction system. We think this follows… | ||
| scan0060 | Fuel distribution tests comparing vertical and horizontal single jet carburettors. | ||
| View original record | H. From Hs/Hn. c. to SG. Nor. c. to R.A. Da. c. to Hy. γ 5080 X 148 DISTRIBUTION. VERTICAL CARB. J.I. Incurve No. 51. we shewed that, except at full throttle speeds below 1000 RPM, the induction… | ||
| scan0061 | Two photographs showing different angles of an engine. | ||
| View original record | 2 19 | ||
| scan0062 | Photograph of an engine carburettor and intake manifold. | ||
| View original record | 1 568 | ||
| scan0063 | Performance comparison graph for two different vertical SU carburettor distribution setups. | ||
| View original record | R.M. 52 COMPARISON OF DISTRIBUTION VERTICAL S U 112° CAMSHAFT WITH TWO INLET CAMS. HIGH LIFT ROCKERS OPEN EXHAUST. INLET VALVE DIA. 1·4 WITH MIN HEAD CLEARANCE OF .225 ROUND VALVE. VERTICAL CARB. 1… | ||
| scan0064 | Blueprints and parts for the 'Japan III' project, covering cylinder, inlet pipes, carburetter, and silencer sections. | ||
| View original record | To RHC. c. HS/Rn. X5080 BY/CS.5/EH.11.12.31. X5050 X5080 X5230 Re Japan III - Cylinder - Section 5050 Inlet Pipes - Section 5070 Carburetter - Section 5080 Silencer for Exhaust Heated Throttle - Sec:… | ||
| scan0065 | Parts list for engine induction and carburettor systems, continued from a previous page. | ||
| View original record | BY/CS.5/EH.11.12.31. cont'd. -2- Section 5030 cont'd :- E.51543 Carburetter Drain Pipe E.57300 Inner Shell - Air Intake 1 off. E.57302 Outer Shell - " " 1 " E.57305 Distance Tube - " " 1 " E.57306 Set… | ||
| scan0066 | The readiness of fixed choke carburettors for fitment to a 16-G-IV unit, with an attached power curve from a Japan 1 unit. | ||
| View original record | To R. From Hs/Rm c. to Sg. Nor. c. to E. Da. c. to Hy. Y5080. Hs/Rm.1/MA.14.12.31. X5771 TWO FIXED CHOKE CARBURETTERS TO LeC.2924 We have now got these carburettors to a condition where they are ready… | ||
| scan0067 | Performance graph showing power output for a 'Japan Unit' engine with specific modifications to cams, rockers, and valves. | ||
| View original record | RM. 58 POWER OUTPUT WITH R.R. CARBS TO LEC. 2924 JAPAN UNIT. 112° SHAFT. INLET & EXHAUST CAMS TO E.55358 HIGH LIFT ROCKERS OPEN EXHAUST INLET VALVE DIA 1.4 MACHINED TO GIVE MIN CLCE .225 ROUND VALVE… | ||
| scan0068 | Requesting the replacement of a blueprint due to an error in the title. | ||
| View original record | To R. From Hs/An. c. to Sg. Wor. c. to E. Da. c. to Hy. 85080 Hs/An.3/WA.14.12.31. x5771. DISTRIBUTION AND POWER OUTPUT J.I. Will you please replace print No. An.31 attached to memo… | ||
| scan0069 | Performance graph plotting engine power output, pressure, and induction against RPM for a specific component setup. | ||
| View original record | POWER OUTPUT JAPAN UNIT C/R 5-65-1 RM. 51 112° CAMSHAFT INLET & EX. CAMS TO E55358 HIGH LIFT ROCKERS. OPEN EXHAUST. INLET VALVE DIA 1·4 MIN CLCE ROUND INLET VALVE ·225 1 7/8 S.U. ① CLAUDEL ② MIXTURE… | ||
| scan0070 | Modifications and testing of a 25 HP carburetter. | ||
| View original record | γ 5080. To R. (At Le Canadel) From Hs. c. to Sg. c. to Wor. c. to E. c. to Da. c. to By. 25 HP. CARBURETTER. We have a 25 HP. car running on the road with a modified standard carburetter using… | ||
| scan0071 | Preliminary test results for a larger choke carburetter on a 20/25HP car. | ||
| View original record | For Files. Y5080. 15. 1. 32. 20/25HP. CAR LARGER CHOKE CARBURETTER. We have carried out preliminary tests on 19.G.IV. fitted with a standard carburetter modified by using 50% larger chokes and a… | ||
| scan0072 | The effects of using a heavy air valve on carburetter performance and idling. | ||
| View original record | -2- (b) With heavy air valve:- The carburation in this case is essentially similar to when the light air valve is employed and has the same defect of excessive richness idling. When changing over from… | ||
| scan0073 | Features and development of various carburettors for the Phantom model. | ||
| View original record | E. HS. ) FROM R. RG. ) (At Le Canadel.) X5080 R2/M26.2.32. Sent from WW.29.2.32. C. to SG. WOR. BY. PN. CAR WORK - CARBURETTERS. X.7080 X.5080 I thank Mr. Elliott for his memo. re. our vertical… | ||
| scan0074 | Fuel consumption and engine valve timing specifications. | ||
| View original record | -2- This week I heard of a South American living near here sending his Graham-Paige (recently new) for sale because it was doing under 8 miles per gallon. In the past RR. cars have been exceptionally… | ||
| scan0075 | Difficulties with new carburettors and the merits of single versus dual carburettor systems. | ||
| View original record | x5080 To R. From Hs. c. to Hr. c. to Wor. c. to E. c. to Da. c. to By. c. to PM. Hs.1/WJ.3.3.32. x7080 CARBURETTERS. It must be remembered that one of the chief difficulties we have in coming to a… | ||
| scan0076 | Comparison of carburetter configurations for Continental Phantom & 25HP models, weighing performance, cost, and complexity. | ||
| View original record | SG. FROM E. C. to WOR. Hs. X5080. E1/M5.3.32. X.7080 X.5080 CARBURETTERS - CONTINENTAL PHANTOM & 25HP. The best all round performance has been obtained with two SU. carburetters, but there are serious… | ||
| scan0077 | List of modifications and specifications for LeC.2924 carburetters. | ||
| View original record | X5080 RHC. From Hs/Mths. Hs/Mths.1/MA.5. 4. 32. LeC.2924 CARBURETTERS. List of modifications carried out on above carburetters. Choke size should be:- 1.050 dia for Japan III units. (V1331) .900 " "… | ||
| scan0078 | Carburetter design for J. 3 and Peregrine engines. | ||
| View original record | E. } FROM R. HS. } (At Le Canadel.) X5080. R2/M12.4.32. Sent from WW 14.4.32. C. to SG. WOR. BY. DA. CAR WORK - CARBURETTERS. X. 50 80 X. 40 27 These will be needed for J. 3. and Peregrine; if you… | ||
| scan0079 | Issues with carburettors sticking during slow running, suggesting a cause related to a washer causing distortion. | ||
| View original record | To RHC. From Hs/Rm. X5080. Hs/Rm.2/MJ.13.5.32. 16-G4. CARBURETTERS. LEC.2924. We have continuous trouble on the road with these carburettters when trying to slow run. The throttles invariably stick… | ||
| scan0080 | List of eight modifications and checks for carburettor and throttle systems. | ||
| View original record | (1) Throttles sticking. Fit Vellumoid washer instead of C. and A. to prevent pulling up distortion. (2) Hot spot pipe to have sliding joint connection where the brazed joint has cracked. (3) Stud in… | ||
| scan0081 | Continuous trouble with carburetter throttles sticking during slow running due to distortion and thermal expansion. | ||
| View original record | To RHC. From Hs/Rn. X 5080. Hs/Rn.2/WJ.13.5.32. 16-G4. CARBURETTERS. LEC.2924. We have continuous trouble on the road with these carburetters when trying to slow run. The throttle invariably stick for… | ||
| scan0082 | List of modifications and fixes relating to throttle, carburettor, and induction system issues. | ||
| View original record | (1) Throttles sticking. Fit Vellumoid washer instead of C. and A. to prevent pulling up distortion. (2) Hot spot pipe to have sliding joint connection where the brazed joint has cracked. (3) Stud has… | ||
| scan0083 | Cover note for an attached list of modifications to LeC.2924 carburetters. | ||
| View original record | X5080. By. From Hs/Rm. Hs/Rm.2/MA.20. 5. 32. Attached list of modifications which we have found necessary to LeC.2924 carburetters. Will you please alter your details accordingly. Hs/Rm. | ||
| scan0084 | List of modifications for LeC. 2924 carburettors. | ||
| View original record | LeC. 2924 CARBURETTERS. List of modifications carried out on above carburetters. Choke size should be :- 1.00 dia for Japan 3 units (V.1254) .900 " " Japan 1 units (V.1332) Main Jets. .093 dia.… | ||
| scan0085 | Performance of fixed throat carburetters and proposing future developments for continental models. | ||
| View original record | HS.) FROM R. E.) X5080. R3/M30.5.32. X.5080 C. to SG. WOR. BY. CARBURETTERS - 16-C-4. I have only driven this car a short distance, but it appears to be remarkably good as regards carburation, snap… | ||
| scan0086 | Continued memorandum outlining objections to the SU carburetter compared to fixed adjustment alternatives. | ||
| View original record | R3/M30.5.32. Contd. -2- You will realise that I am maintaining my objection to the SU. carburetter for our class of work as I consider that it has the objectionable features of the risk of dripping… | ||
| scan0087 | Decision to abandon the use of double carburetters on the J.I. model. | ||
| View original record | X5080 To Hs. from Sg. re J.I. Sg2/E17.6.32 You will remember that, when we discussed the above at Derby at our last meeting and arranged for you to convert one of your existing experimental cars with… | ||
| scan0088 | The design and fitment alteration for a J.3. Semi-Expanding Carburetter. | ||
| View original record | X 5080. To BY. c. Wer. c. Hs. E/JNR.1/HP.30.6.32. J.3. Semi-Expanding Carburetter. ----------------------------- We send you herewith LeC.3122, a complete design for the above. To fit this to a Japan… | ||
| scan0089 | The design and part interchangeability of the expanding carburettor for the J.III chassis, comparing it with the Phantom II model. | ||
| View original record | X 5080. To R. from E. E.6/HP.6.7.32. c. Sg. Wor. Hs. By. re R.R. Expanding Carburetter for J.III Chassis. Please find herewith print of LeC.3122 showing the design for the J.III carburetter we have… | ||
| scan0090 | Loss of effective mixture control with the semi-automatic carburetter. | ||
| View original record | 85080. X7080 To R. From Hs. c. to Ss. Wor. c. to K. Da. c. to Hdy. Hy. Hs.4/HJ.16.7.32. SEMI AUTOMATIC CARBURETTER. When we use our semi-automatic carburetter we lose an effective mixture control as… | ||
| scan0091 | Fuel consumption and the mixture strength control for the J.3. & Peregrine carburetter. | ||
| View original record | E. } FROM R. HS. } C. to SG. WOR. BY. X5080. R3/M31.8.32. x4027. J. 3. & PEREGRINE CARBURETTER. The question of the consumption of fuel is becoming rather serious with all our cars. We must expect it… | ||
| scan0092 | Modifications to a mixture lever and its quadrant markings following the deletion of a carburetter governor. | ||
| View original record | BY. c. Hs. V5080 E/JNR.3/HP.3.10.32. Please receive herewith:- LeC.3224 - showing the lever from the normal vertical position to 45° on the right-hand side. At the request of R. we have permitted the… | ||
| scan0093 | Instruction to build a 25 HP Tank Carburetter for test bed purposes. | ||
| View original record | X5080. To RHC. from Hs/GWH. Hs/GWH.10/KT.1.11.32. 25 HP. TANK CARBURETTER. To confirm verbal instructions. Will you please build up a 25 HP. Tank Carburetter to LOP.E.58553. The main body of the… | ||
| scan0094 | General report on the development and testing of carburettor intake silencers. | ||
| View original record | 85080. To R. from Hs/Rm. c. Sg. Wor. c. E. By. c. Da. Hdy. Hs/Rml/BE.28.11.32. X442. X7080. CARBURETTER INTAKE SILENCERS - GENERAL We have done now sufficient work on intake silencers to be able to… | ||
| scan0095 | The design of an A.C. Silencer for a 5-litre engine, including a diagram and notes on tuning methods. | ||
| View original record | -2- Hs/Rml/BE28.11.32. The A.C. Silencer was designed for a 5-litre engine i.e. 35% smaller than the Phantom. In spite of this its capacity is greater than all except one, of the silencers that we… | ||
| scan0096 | Tests for a carburetter air intake silencer, comparing alternatives to eliminate induction roar. | ||
| View original record | -3- Hs/Rml/BE28.11.32. -------- P.II. SEMI-EXPANDING CARBURETTER AIR INTAKE SILENCER. Tests on the Phantom semi-expanding carburetter have demonstrated that we require a certain minimum length of… | ||
| scan0097 | Test report comparing the performance of different intake silencer designs and configurations. | ||
| View original record | -4- Scheme 2. Tests shewed that to get the best results it was necessary to have a certain length of intake. Also that the efficiency depended not only on the capacity of the chambers and the point of… | ||
| scan0098 | Recommending an intermediate size of silencer for the induction pipe, with an attached photograph. | ||
| View original record | -5- Hs/Rm.1/BE.28.11.32. Cont'd. Summarising the results, we should recommend the intermediate size of silencer of the type above the induction pipe as being a good compromise and attach a photograph… | ||
| scan0099 | Blueprint detailing designs and performance data for PII Resonance Silencers for a Semi Expanding Carburetter. | ||
| View original record | B P II RESONANCE SILENCERS FOR SEMI EXPANDING CARBURETTER. HS 780 ③ 3.5" 10.25 0.2813 5.875 2.813 HOLES AS ① & ② CAPACITY OF RESONANCE PORTION OF SILENCER: 300 CU. INS. POWER LOSS: NIL ON P II ④ 6.5"… | ||
| scan0100 | Blueprint detailing two designs for Phantom II intake resonance silencers for a semi-expanding carburetter. | ||
| View original record | P.II INTAKE RESONANCE SILENCERS FOR SEMI-EXPANDING CARBURETTER. HS 781 A ① 5.625 9.50" 20 .250 DIA HOLES. 2.625 2.437 4.0" 20 - .5 DIA HOLES. CAPACITY OF RE PORTION OF SILENCER 139 CU. INS. POWER LOSS… | ||
| scan0101 | Blueprint showing diagrams and specifications for two types of American intake silencers for Chrysler and Nash vehicles. | ||
| View original record | Hs 782 C TYPES OF AMERICAN INTAKE SILENCER A. C. BURGESS AIR SILENCER. 32 HP CHRYSLER. 24.5" 19.0" PERFORATED SHEET .0625 DIA: HOLES .250 PITCH 4.250 2.250 5.250 CAPACITY OF RESONANCE PORTION OF… | ||
| scan0102 | Blueprint showing the design of a typical A.C. silencer for a 5-litre car. | ||
| View original record | Hs 783 TYPICAL A.C. SILENCER 5 LITRE CAR SEC: HS.782. | ||
| scan0103 | Tests conducted on an air intake silencer for a 25 HP car. | ||
| View original record | E. from Hs/G.H.Whyman. c. By. Wor. 85080. Hs/GHW.7/KT.2.1.33. x+688. AIR INTAKE SILENCER FOR 25 HP. CAR. Our first tests were carried out on 18.G.IV. car to which we fitted the latest type Tank engine… | ||
| scan0104 | The development and testing of an adjustable air silencer, including a dimensioned sketch. | ||
| View original record | -2- This gave us a still further slight improvement. We next fitted a tube 2.5" diameter to the top casting so that we could fix up our adjustable air silencer as previously fitted to our P.II's,… | ||
| scan0105 | Modifying the air silencer on the 20/25 HP model to regain lost power. | ||
| View original record | To E. from Hs/Rn. c. to Ey. Y 5080. Hs/Rn.1/KT.3.1.33. x 4688. AIR SILENCER FOR THE 20/25 HP. While making tests on the tank carburetter we observed a drop in power of about 6%, due to the form of… | ||
| scan0106 | Performance curves for a 20/25 HP engine with various tank carburetter configurations and timing diagram. | ||
| View original record | 20/25 H.P. UNIT C.S. TANK CARBURETTER E58553 R.M. 71 14-12-32 ① COMPLETE CARB. E58553 ② E.58370 REMOVED ③ AS ② WITH E.58391 & E.51173 REMOVED ④ STANDARD = O.I.S CARB. (COMPLETE) COMP. RATIO 5.75:1… | ||
| scan0107 | Request to put in hand two further sets of J.III carburettors and associated pipes. | ||
| View original record | RHC. from Hs/Rm. 85080. Hs/Rm.4/KT.3.1.33. J.III CARBURETTERS. We are very satisfied with the carburetter to LeC.3122 and the pipe to LeC.3140. At the moment we have only one set of these parts. Will… | ||
| scan0108 | Additional feature for the J.2 and Phantom II semi-expanding carburetters to prevent air leakage. | ||
| View original record | [Handwritten Top] SWDL X5080 [Handwritten Right] X7080. X5080. [Handwritten Center] SWDL [Typed] To BY. from E. c. to Hs. E/JNR.8/HP.3.1.33. re Semi-Expanding Carburetters. ---------------------------… | ||
| scan0109 | The testing, modification, and standardization of a 25 HP carburetter with an air silencer. | ||
| View original record | To R. From Hs. c. to SG. c. to Wor. c. to I. c. to Da. c. to Ey. c. to Hdy. 25 HP. CARBURETTER. We have been carrying out tests on an experimental car with an air silencer on 25 HP. carburetter… | ||
| scan0110 | Re-designed throttle edge adjustment for semi-expanding carburetters on Phantom II and J.2 models. | ||
| View original record | X5080 To BY. from E/JNR. E/JNR.4/HP.16.1.33. X7080. X5080 c. Hs. re Semi-Expanding Carburetters - Phantom 2 and J.2. Please receive herewith: LeC.3349 - Re-designed R.R. Throttle Edge Adjustment.… | ||
| scan0111 | Carburetor testing and troubleshooting for a J.II engine unit. | ||
| View original record | X5080 File. 30.1.33. Report of work done on J.III. S.E. Carb. on J.II. engine unit. The carburetter was fitted to the engine using the existing J.II. induction pipe. An ideal metering curve was taken,… | ||
| scan0112 | Line and scatter plot graph comparing 'Ideal' and 'Actual' results, with a condition noted as 'Passage Blocked'. | ||
| View original record | 8 7 6 5 500 1000 1500 2000 2500 3000 3250 IDEAL ACTUAL PASSAGE BLOCKED | ||
| scan0113 | Request to build and fit an air silencer and cleaner for a 25 HP carburetter. | ||
| View original record | X 5680 To RHC. from Hs/GHW. Hs/GHW.6/KT.13.2.33. Will you please build one air silencer and cleaner for the 25 HP, carburetter to LeC.3363, as soon as possible, and fit same to 18-G-IV. Hs/GHW. | ||
| scan0114 | Testing of an air silencer on a 25 HP car, noting an issue with excessive oil consumption. | ||
| View original record | FILE X5080 from Hs/Whyman. 16.3.33. Re. AIR SILENCER TO LEC.3363. FOR 25 HP. CAR. We have now tested the above air silencer on 18.G.IV. and consider that it is quite O.K. for silence. A power curve… | ||
| scan0115 | Performance graph of Horsepower vs R.P.M. comparing a standard silencer with an experimental silencer. | ||
| View original record | HP R.P.M. CURVE TAKEN WITH EXPL. CARB. SILENCER ON TANK ENGINE WITH FAN. POWER VERY SLIGHTLY BETTER THAN WITH STANDARD AIR MAZE SILENCER. 15. 3. 33 UNIT BED W N 1800 STANDARD SILENCER. EXPL. SILENCER. | ||
| scan0116 | Modified crankcase breather and flame trap gauze for the 20-HP Resonance Air Silencer. | ||
| View original record | To BY. from E/JNR. E/JNR.1/HP.25.3.33. X5080 c. Wer. Hs. 20-HP Resonance Air Silencer. We send you herewith: LeC.3426 - showing a modified crankcase breather. This design has been tried and proves… | ||
| scan0117 | Two new designs of copper gauze air cleaners for 20-HP and Phantom II models. | ||
| View original record | X5090 To BY. from E/JNR. E/JNR.3/HP.28.3.33. c. Wer. Hs. RHC 20-HP. and Phantom 2 Air Cleaners. Please receive herewith: LeC.3429 - Two designs of the air cleaners made up in copper gauze, to be… | ||
| scan0118 | Tests on air silencers for 25 HP & Phantom II cars to investigate and resolve excessive oil consumption. | ||
| View original record | X5080 Hs. Rem. W. 30.3.33. AIR SILENCERS ON 25 HP. & P.II. CARS. Y7080 Further to our report of 16.3.33. re excessive oil consumption since fitting the new air silencers, we have now run a series of… | ||
| scan0119 | Oil consumption issues and breather pipe modifications on Phantom II cars. | ||
| View original record | -2- have been asked to instruct the works to fit LeC.3420 with .350" pipe replacing .500" pipe on all cars fitted with the new resonant air silencer. We are now carrying out further experiments on… | ||
| scan0120 | Blueprint showing a modification to the breather connection on a Phantom II crankcase. | ||
| View original record | LEC3420 REFER TO LEC3354 FOR DESIGN OF BREATHER CONNECTION. TO CARBURETTER. E OF NO 4 CYL: CRANK WEB SECTION THRO A.A. .500 o/D 20SWG (.036). REPLACED WITH .250 o/D .5625 o/D - 21SWG (.032) SWEAT IN… | ||
| scan0121 | With a blueprint showing modifications to a silencer for a test to increase power output. | ||
| View original record | +5080 To Mr. from E. E.4/HP.4.4.33. c.Hs/Rm. re Tank Carburetter. We attach herewith a blueprint of Lec.3065 showing where the nozzles should be cut off in the silencer, marked in yellow, for the test… | ||
| scan0122 | Request for parts and modifications for a J.III No.2 test unit carburettor. | ||
| View original record | V1580 RHC. From Hs/Swdl. Hs/Swdl.8/MA.31.5.33. The following parts and modifications are urgently required for J.III No.2 test unit V.1578 modification to carb. body (E.58728) Increased air port.… | ||
| scan0123 | Design for a clean air supply to a 20/25 HP tank carburetter to prevent grit ingress. | ||
| View original record | x5680 To W.A. from E/JNR. E/JNR.1/HP.2.8.33. c.-Wcr. Hs. 20/25 HP. Tank Carburetter. We understand that our design of clean air supply to the carburetter air valve to LeC.3576 has been passed on to… | ||
| scan0124 | Customer complaint of 'spitting in exhaust' on the 20/25 chassis on retard. | ||
| View original record | X V610 COPY. Hs/Rm. copy to E. BY. Wor. EP/2/EG26.8.33. RE: 20/25 CHASSIS/ SPITTING IN EXHAUST ON RETARD. As discussed with you today, we do not feel that the seriousness of the above defect is… | ||
| scan0125 | Carburettor performance and a spitting exhaust issue on a 25 HP chassis. | ||
| View original record | To EP. From Hs. c. to E. c. to By. c. to Wor. X5080 Y5238 Hs.5/MJ.31.8.33. Re. 25 HP. Chassis. Spitting in the Exhaust on Retard. Replying to EP.2/EC.26.8.33. We do not consider there is any possible… | ||
| scan0126 | Modification to the 20/25 Chassis Carburetter Air Valve to prevent dust ingress. | ||
| View original record | SWDL See me X5050 To Hs. from E. c. Wor. C. By. PN Mx. EP 20/25 Chassis Carburetter Air Valve. Referring to report Mx12/T.8.9.33 on the recent 100 hours test of certain modifications on the Tank… | ||
| scan0127 | Proposed modification to the carburetter air valve on a 20/25 HP chassis. | ||
| View original record | X5080. E/W. ... from FH. Copy to Hs. By. FH.3/WT12.9.33. 20/25 H.P. Chassis Carburetter Air Valve. Referring to A.2/HP11.9.33 we shall certainly be interested to hear what becomes of the proposal to… | ||
| scan0128 | Requesting a modification to the 20/25 HP carburetter. | ||
| View original record | X5080. RHC. From Hs/Swdl. Hs/Swdl.2/MA.13.9.33. Will you please carry out the modification LeC.3594 to the 20/25 HP. carburetter, which Dodd will supply to you. Hs/L.H.Swindall. | ||
| scan0129 | Reporting on the road test results of a modified carburetter air valve for a 20/25 HP chassis. | ||
| View original record | To HS from Gaw Hyman X5080 29-9-33 FILE 20/25 HP Chassis Carburetter Air Valve. We have now tested on the road the modified air valve to LEC 3594 with satisfactory results, no difference in the… | ||
| scan0130 | The performance of a 1 5/8 S.U. carburetter on a 20/25 HP engine. | ||
| View original record | X 5080 To Hgr. From Ha/Rm. C. C. D. Dm. Ey. Fh. DG/NK. Ha/Rm.7/KL.8.10.35. X149J. 1 5/8 S.U. CARBURETTER TO NO.1187. This carburetter gives 13 B.H.P. more on the standard 20/25 HP. engine than the… | ||
| scan0131 | Standardisation report for a modified carburetter and air silencer to reduce noise. | ||
| View original record | RR 755 (10H) (30405, 21-4-32) BM. 3/8382/4. x5080 COMPLETED 3.11.33. STANDARDISATION of CHASSIS PARTS. Date 4.1.33. X No. 080 Drawing No. Part List Description of Parts. MODIFIED CARBURETTER & AIR… | ||
| scan0132 | Implementation specifications and costs for a new chassis part. | ||
| View original record | STANDARDISATION of CHASSIS PARTS The number of the first chassis on which the new part will be fitted........... Z. Series. Date when chassis will be handed to test.... May 13th 1933. Cost of scrapped… | ||
| scan0133 | Confirming the dispatch of a blueprint for a 20/25 HP 1-5/8' Horizontal Carburetter. | ||
| View original record | +5880 To BY. from E/JNR. E/JNR.1/HP.4.11.33. c. Hs. 20/25 HP. We send you herewith blueprint: LeC.3688 - 1-5/8" Horizontal Carburetter. E/JNR. | ||
| scan0134 | Comparative tests for an improved carburetter on a 25 HP car to increase performance and fix banging in the silencer. | ||
| View original record | To Sg. From Hs. c. to Wor. c. to C. c. to PN. c. to E. Re. 25 HP. Car. We have a 25 HP. car running with the improved carburetter which we hope will give us the increased performance and overcome the… | ||
| scan0135 | Arranging a meeting at Bignall's Corner to test a 25 HP Demonstration car. | ||
| View original record | To PN. From Hs. 85080. Hs.4/MJ.8.11.33. We will arrange to meet you at Bignall's Corner on Monday next, the 13th.inst., at 11.30 a.m. If you will bring along a 25 HP. Demonstration car we ought to be… | ||
| scan0136 | Arranging a meeting for carburetter tests on a 25 HP vehicle. | ||
| View original record | S/W. Hs...from PN. Copy to Sg. C. Bn. Cx. PN.1/WT9.11.33. Carburetter Tests 25 H.P. I have received your Hs.4/MJ.8.11.33 and will meet you at Bignals Corner at 11.30 a.m. on Monday next the 13th… | ||
| scan0137 | Request to prepare a test bed for a new carburetter designed for the 20/25 HP engine. | ||
| View original record | x1090 To RHC. from Hs/Rm. Hs/Rm.5/KT.9.11.33. TESTING NEW CARBURETTER FOR 20/25 HP. E. has designed a new carburetter for the 20/25. We have no test bed unit so will you please, therefore, fit C.13.… | ||
| scan0138 | New 20/25 HP carburetter, focusing on petrol consumption, production status, and the need for comparative tests. | ||
| View original record | x8080 To Hs. from Sg. re 20/25 HP New Type Sg4/E14.11.33 [strikethrough]Copy to Cx.[/strikethrough] Carburetter. Referring to our meeting yesterday there is one point which I think we all forgot to… | ||
| scan0139 | Drawing LeC.3694, showing the air intake silencer for a 1-5/8' horizontal carburetter on a 20/25 HP model. | ||
| View original record | P5080 To BY. from E/JNR. c. WOF. Hs. E/JNR.15.11.33. 20/25 HP. We send you herewith: LeC.3694 showing the air intake silencer for the 1-5/8" horizontal carburetter. E/JNR. | ||
| scan0140 | The dispatch of a horizontal carburetter for a 20/25 HP vehicle. | ||
| View original record | To BY. from E/JNR. c. Wor. Hs. 75080 E/JNR.6/HP.15.11.33. 20/25 HP. We send you herewith:- LeC.3694 - 1-5/8" horizontal carburetter. E/JNR. | ||
| scan0141 | New 20/25 HP Horizontal Carburetter, referencing associated drawings for controls. | ||
| View original record | x5080 To BY. from E/JNR. E/JNR.4/HP.15.11.33. c. Wor. Hs. re New 20/25 HP. Horizontal Carburetter. We send you herewith: LeC.3689 showing all the controls from the bottom of the steering column to the… | ||
| scan0142 | Carburettor tests for the 20/25 HP model, comparing an experimental LU carburettor with the standard one. | ||
| View original record | To SG. from Hs/Rm. c.c. WOR. G. P. E. H. CX. 15080 Hs/Rm.2/KT.28.11.33. x5771 CARBURTTER TESTS - 20/25 HP. On 13.11.33. we demonstrated our expl. car 18.G.IV. fitted with an L.U. carburetter having a… | ||
| scan0143 | Experiments on the 20/25 carburetter air valve and proposing a modification to prevent it from sticking. | ||
| View original record | To RHC. from Hs/Rm. tr080 Hs/Rm.14/KT.7.12.33. We have been carrying out some experiments on the air valve of the 20/25 carburetter. The object of the test was to reduce the clearance and so reduce… | ||
| scan0144 | Modified 20/25 HP carburetter designed to prevent the air valve from sticking and arranging its fitment to chassis 20-G-IV. | ||
| View original record | W/S - C. X5780 Hs/Gry.8/KW15.1.34. 20/25 HP. Carburetter. We have produced a Carburetter modified to prevent the air valve sticking. This latter is now guided at the bottom by a steel guide, and has… | ||
| scan0145 | Request for a modification to fit a 20/25 Horizontal Carburetter LEC.3688 to a standard engine. | ||
| View original record | X5080 RHC. From Hs/CTS. Hs/CTS.5/MA.17.1.34. 20/25 HORIZONTAL CARBURETTER LEC.3688. For the fitting of the above carburetter to the standard 20/25 unit, a modification is necessary to the cylinder… | ||
| scan0146 | Arranging to fit a modified carburettor to car 20-G4 to prevent a sticking air valve. | ||
| View original record | X5080 les Tuesday S/W Hs/Gry...from C. C7/C16.1.34 Re 20/25 h.p.CARBURETTOR. Hs/Gry8/KW15.1.34 --------- I note you have produced a modified carburettor to prevent the air valve sticking. Any day that… | ||
| scan0147 | Instruction to prepare a second 25 HP Air Valve Piston for use on chassis 19-G-IV. | ||
| View original record | RHC/CEP. X5080 Hs/FD.9/KW.8.2.34. Will you please instruct a second 25 HP. Air Valve Piston to EX.13110 & 11, to be used on 19-G-IV. Hs/F.Dodd. | ||
| scan0148 | The demonstration and usefulness of a Cambridge Exhaust Gas Analyser for engine testing. | ||
| View original record | X5058 file INDUCTION DEVELOPMENT. THE CAMBRIDGE EXHAUST GAS ANALYSER. A demonstration of the above instrument conducted by a representative from the Cambridge Instrument Co. has been carried out on… | ||
| scan0149 | Reprint from 'The Automobile Engineer' on the Cambridge Exhaust-Gas Analyser for determining mixture strengths. | ||
| View original record | Reprinted from THE AUTOMOBILE ENGINEER, January, 1934. THE CAMBRIDGE EXHAUST-GAS ANALYSER. Determining Mixture Strengths while Running on the Road. THE analysis of exhaust gases in internal-combustion… | ||
| scan0150 | The principles of operation and features of the Cambridge exhaust-gas tester. | ||
| View original record | 2 Wheatstone bridge which satisfies the conditions. The two identical spirals of platinum wire, having resistances r1 and r2 respectively, are enclosed in two separate cells E1, E2 in a metal block.… | ||
| scan0151 | Performance and acceleration figures comparing two different carburettor types. | ||
| View original record | To Hs/Gry. C. to Hs/GTS. 13.2.34. 19-G-IV - PERFORMANCE & ACCELERATION FIGURES. Axle 11 x 50 Tyres 6" x 19" Total Weight Tons cwt. qr. lb. 1 17 1 7 Standard Carburettor New Type Carburettor. Stanton… | ||
| scan0152 | Issues of sticking air valves and exhaust explosions on the 20/25 HP model. | ||
| View original record | X5080 W/S. To H. from W/Ltd. E/Ltd.2/HP.15.2.34. c. Sg. Wor. Hs. Hdv Sticking Air Valves and Exhaust Explosions. H.20/H.9.2.34. We attach herewith some information on the progress that has been made… | ||
| scan0153 | Two proposed schemes to fix sticking air valves on the 20/25 HP car. | ||
| View original record | re Sticking Air Valves - 20/25 HP. Car. There are two schemes at present in hand to overcome this defect. The first scheme deletes the snift holes and the air which on the present design passes… | ||
| scan0154 | Modifications required for the 20/25 Horizontal Carburetter. | ||
| View original record | To RHC. X 5080 Hs/CTS.4/KW.29.2.34. 20/25 Horizontal Carburetter. Re your memo. RHC/WSC.19/AP.28.2.34. Will you please produce two more carburetters to LEC.3688, incorporating the following… | ||
| scan0155 | Request to borrow a complete 20/25 petrol system to carry out tests on a new horizontal carburettor. | ||
| View original record | To Mr. Scott. c. to Sft. X5080 Hs/CTS.1/KW.10.3.34. 20/25 Horizontal Carb. We wish to borrow a complete 20/25 Petrol system - Rear Tank, Autovac, Filter Pipes, Taps, etc., in order to carry out tests… | ||
| scan0156 | Tests of the 20/25 Autovac petrol supply system with a new horizontal carburetter. | ||
| View original record | X 5080 To SG. c. to Wor. c. to L. c. to Dy. c. to Da. c. to Hdy. Hs/CTS.9/KN.13.3.34. 20/25. Petrol Supply System (Autovac). Tests have been carried out to determine the efficiency of the standard… | ||
| scan0157 | Graph of Autovac fuel supply tests, plotting delivery vs. consumption and time to empty against engine RPM. | ||
| View original record | 20/25 HP FUEL SUPPLY (AUTOVAC TESTS) B.7. UNIT COMP. RATIO 5.8:1 CAMSHAFT E57177 (V.O.S') 1 5/8" HORIZONTAL CARB. (LEC 3688) CYL. BLOCK LEC 3795 (60° & LARGER PASSAGE) COMPLETE STANDARD 20.25 PETROL… | ||
| scan0158 | Modifications to a new horizontal carburettor for the 20/25 model. | ||
| View original record | To RHC/HPS. X5080 Hs/CTS.7/KW.15.3.34. 20/25. New Horizontal Carburetter, LEC.3688. You are preparing two or more modified carbs. to LEC.3688. Instead of producing two the same size, namely, 1 3/8… | ||
| scan0159 | Request for the production of a modified suction piston for a 20/25 horizontal carburettor. | ||
| View original record | X5080 RHC/HPS. Hs/CTS.8/KW.26.3.34. 20/25 Horizontal Carb. We send you herewith LEC.3848. This modification to the suction piston has been brought about in order to make the action similar to that of… | ||
| scan0160 | The 1 1/2' Horizontal Carburetter for the 20/25 model and its modifications. | ||
| View original record | X5080 To BY. from E/PSN. E/PSN.3/HP.29.3.34. c. Hs. 1 1/2" Horizontal Carburetter - 20/25. We send you herewith: LeC.3843 1 1/2" horizontal carburetter for the 20/25. This carburetter is substantially… | ||
| scan0161 | Urgent memo regarding a 1½' Horizontal Carburetter for a 20/25 HP test car. | ||
| View original record | X5080 To By. from E/Lid. E/Lid.2/HP.4.4.34. c. Hs. 1½" Horizontal Carburetter - 20/25 HP. With reference to LeC.3843 issued under covering note E/PSN.3/HP.29.3.34, will you please note that owing to… | ||
| scan0162 | The testing and implementation of new 20/25 HP carburetter air valves. | ||
| View original record | X 5080 To E/Lid. From Hs/Rm. c. to Hd. Hs/Rm.2/KW.7.4.34. Re. 20/25 HP. Carburetter Air Valves. Reference Hd/SB21/MW.26.3.34. We are about to start a 10,000 miles test with the new Rolls-Royce… | ||
| scan0163 | Continual trouble with sticky carburetter air valves on 20/25 HP cars and an inquiry into the progress of two improvement schemes. | ||
| View original record | X5080 Hs. c to E/Lid. Hd/SB21/MW26.3.34. Re: 20/25 HP. Carburetter Air Valves. --------------------------------- As we are still having continual trouble with sticky air valves, and the Administration… | ||
| scan0164 | Requesting the modification of a cylinder block to test a new horizontal carburetter. | ||
| View original record | X 5080 To RHC. From Hs/CTS. Hs/CTS.4/MJ.13.4.34. Re. 1 1/4 HORIZONTAL CARBURTTER (20/25). We are sending you a cylinder block, suitable for the fitting of the new horizontal carburetter, which at the… | ||
| scan0165 | The testing and feasibility of new carburetter air valves for the 20/25 HP model. | ||
| View original record | To Hd. c. to E/Lid. Hs/Rm.1/KW.14.4.34. Re. 20/25 HP. Carburetter Air Valves. --------------------------- Reference Hd/SB21/MW.26.3.34. We are about to start a 10,000 miles test with the new… | ||
| scan0166 | Drawing LeC.3877 for a modified 20/25 HP Horizontal Carburetter. | ||
| View original record | x5080 Rm T. Salt To By from E/JNR. E/JNR.4/HP.16.4.34. c. Hs. RHC. re 20/25 HP. Horizontal Carburetter. We send you herewith drawing:- LeC.3877 shewing the above carburetter modified in various ways… | ||
| scan0167 | Requesting the completion of cylinder blocks to suit the latest 1.500 throttle bore carburetter for test cars. | ||
| View original record | X5080 RHC. From Hs/CPS. Hs/CPS.2/MA.17.4.34. Re. HORIZONTAL TYPE CARBURETTERS (20/25). You have in hand, a number of cylinder blocks to E.59726 to be used with the above type of carburetter. These… | ||
| scan0168 | Instruction to produce one new horizontal carburetter for the 20/25 series chassis. | ||
| View original record | X5080 RHC. From Hs/CPS. Hs/CPS.1/MA.1.5.34. HORIZONTAL CARBURETTER 20/25. The drawings have now been issued for the latest design of the new carb. for the nest series 20/25 which will be fitted to the… | ||
| scan0169 | Fuel consumption test report comparing models 18-G-IV and 21-G-IV over a 112-mile course. | ||
| View original record | Copy for R.R. Carb File X5080 30.4.34. Consumption Test. 18-G-IV & 21-G-IV. Course :- Ashbourne, Buxton, Chapel-en-le-Frith, Glossop, Bamford, Bakewell, Winster, Wirksworth, Duffield, Derby. 21-G-IV.… | ||
| scan0170 | Fuel consumption tests comparing carburettors 21-G-IV and 18-G-IV. | ||
| View original record | X5060 Card Copy for Carb file. 1.5.34. Consumption Tests with 21-G-IV and 18-G-IV. Miles run - 112. Average speed - 31.2 M.P.H. 21-G-IV S.V.R.R. carburetter. Petrol 6.125 gallons. Con. 18.28 M.P.G.… | ||
| scan0171 | Fuel consumption tests for vehicles 21-C-IV and 18-G-IV over a specified course. | ||
| View original record | x5080 2.5.34. Consumption Tests with 21-C-IV and 18-G-IV. Course:- Ashbourne, Buxton, Chapel-en-le-Frith, Glossop, Ashopton, Bamford, Bakewell, Winster, Wirksworth, Duffield, Derby. Carburetters… | ||
| scan0172 | The development and testing of the new expanding carburettor for the 20/25 model. | ||
| View original record | X5080 To SG. c. to Nor. c. to L. c. to Hy. c. to Ds. c. to Mss c. to My. Ha/Hm.S/KW.3.5.34. Latest R.R. Expanding Carburettor for the 20/25. We have now completed the development and tests of the new… | ||
| scan0173 | Complaint memo about a sticky air valve causing cars to stop, with a request for a retrospective cure. | ||
| View original record | C O P Y. S/W - Wor. from C. C17/C.16.5.34. One of the most aggravating complaints at the present time is the sticky air valve, because it actually causes the car to stop. We have just had a man whose… | ||
| scan0174 | Three schemes for an automatic carburetter control using different diameter bellows. | ||
| View original record | Rm To Hs/Rm. from E/PSN. E/PSN.2/HP.18.5.34. c. By. RHC. re Automatic Carburetter Control. We send you herewith a print of LeC.3934 showing 1½" diameter bellows fitted to the automatic starting and… | ||
| scan0175 | Blueprint showing modifications to a horizontal carburettor for automatic control. | ||
| View original record | L&C 3934. SWEAT FOUR BOLT FLANGE. LARGER PHIAL THIS SCHEME IS BASED ON L&C's 3835 & 3898, BUT USES 1 1/2" DIA. BELLOWS. THE INDUCTION PIPE CONNECTION OF L&C 3857 IS RETAINED. ROLLS-ROYCE, LTD PRINT… | ||
| scan0176 | Drawing for an air silencer for the new R.R. carburetter. | ||
| View original record | By. Hs/Rm.10/KW.24.5.34. We hand you herewith Hs.1368, which is a drawing of the air silencer we want for the new R.R. carburetter. We are testing one of these in a thinner gauge material to lighten… | ||
| scan0177 | Request to detail parts for preliminary tests on an Automatic Carburetter Control. | ||
| View original record | X5080 By. c. to E/PSN. c. to RHC. Hs/Rm. 8/KW. 24.5.34. Re. Automatic Carburetter Control. You will see from E/PSN.2/HP.18.5.34 that we are being asked to test out some Bellows Jet Controls shown in… | ||
| scan0178 | Proposal for a 20/25 Air Silencer to fit the new horizontal type carburetter. | ||
| View original record | X5050 Hs/Rm. Hs/Wym.10/KW.23.5.34. 20/25 Air Silencer. Herewith scale drawing of the air silencer we propose to fit to the new 20/25 HP. horizontal type carburetter. This silencer should go on to… | ||
| scan0179 | Complaint about sticking air valves and the solution provided by a new S.U. type carburetter. | ||
| View original record | To Wor. from Hs/Rm. X 5080 Hs/Rm.18/KW.24.5.34. Referring to C.17/C.16.5.34. We developed the attached scheme to Hs.1224 to cure this complaint. An air valve to this drawing did several thousand miles… | ||
| scan0180 | Testing a modified air valve piston for a 20/25 carburettor to fix a sticking issue. | ||
| View original record | 20/25 Carburettor Air Valve In order to overcome the complaints of sticking of the air valve we have tried a modified (HS1224 & HS13110/1) piston in which a large diameter end is guided by a steel… | ||
| scan0181 | Arrangements with the S.U.Co. for producing a new carburetter needle for the 20/25 model. | ||
| View original record | X5050 By. From Hs/CTS. Hs/CTS.3/MA.29.5.34. 20/25 HORIZONTAL CARBURETTER Lec.3877. The complete set of parts is now in hand, for production of the new carburetter, for the first 50 chassis.… | ||
| scan0182 | The results of petrol consumption tests on a 20/25 car compared to a standard model. | ||
| View original record | To SG. c. to Wor. c. to E. c. to By. c. to Px. Attached are copies of some consumption tests carried out on the 20/25 car which is now running 10,000 miles. This was compared with one of our standard… | ||
| scan0183 | Confirming that petrol consumption tests between a new carburetter and the standard one yielded identical results. | ||
| View original record | X5080 To Hs/Rm. from Sg. Copy to Wor.E.PY. Mx.Cx. re 20/25. Sg1/E31.5.34 Thanks for Hs/Rm.6/KW.30.5.34. I am very glad indeed to see that you have carried out careful petrol consumption tests between… | ||
| scan0184 | Consumption tests comparing a carburetter from a specific car with a latest production type. | ||
| View original record | V5D80 31.5.34. 21-G-IV. Consumption Tests. Miles run 114. Average speed 41.4 m.p.h. Carburetter taken off Wor's car. Consumption 18.24 M.P.G. Latest Production type Carburetter. Miles run 114. Average… | ||
| scan0185 | Introduction of automatic controls and elimination of hand controls on Spectre and Wraith models. | ||
| View original record | SECRET. HS Y5080 To E. from Sg. re Chassis Engines - Automatic Controls. Copy to Wor. Hs. EY. EY/NW. Hs/Wst. E/Psn. Sgl/E22.6.34 Many thanks for E.S/HP.16.6.34. I have not replied earlier because I… | ||
| scan0186 | New carburetter for the 20/25 model. | ||
| View original record | EXPERIMENTAL DEPARTMENT REPORT REFERENCE :- Hs/CTS.15/KW.25.6.34. Subject of Report :- New Carburetter - 20/25. General Conclusions :- Increased area through block is an appreciable advantage. Copies… | ||
| scan0187 | Power gains by modifying the cylinder block passage for the 20/25 Horizontal Carburetter. | ||
| View original record | Hs/CTS.15/KW.25.6.34. 20/25 Horizontal Carburetter. Further power gain by modifying the shape of the hole through the cylinder block. Tests have shown that there is a considerable increase in… | ||
| scan0188 | Power output chart for the 20/25 model comparing different cylinder block and carburettor configurations. | ||
| View original record | 20/25 POWER OUTPUT LIST 37 COMP RATIO 5.8:1 CAMSHAFT ES.777 (.02") 1 5/8" HORIZONTAL CARB. (AEC3488) (1) CYL. BLOCK ES9726 (OVAL PASSAGE) (2) PASSAGE INCREASED IN DIA TO 1.200" (30% INCREASE IN AREA)… | ||
| scan0189 | The development and testing of an air silencer for a horizontal carburetter to reduce suction noise. | ||
| View original record | HS/Rm. Sent to E X5060 Hs/FD.7/KW.30.6.34. Air Silencer for R.R. Horizontal Carburetter. On the new 25 HP. Horizontal Carburetter we are troubled with suction hiss, and whilst the large air silencer… | ||
| scan0190 | Testing a small silencer to reduce suction noise and its impact on engine performance. | ||
| View original record | -2- HB/FD.7/KW.30.6.34. With this small silencer fitted, the suction noise has been reduced to a very satisfactory degree without affecting the performance of the engine. The loss reported on the test… | ||
| scan0191 | Ordering alternative 'XB8' carburetter needles from the S.U. Co. for the latest series 20/25HP. | ||
| View original record | x5080 Roy. From Hs/CTS. c. to Mx. Hs/CTS.2/MA.11.7.34. 20/25 HP. CARBURETTER. With reference to the needles which will be supplied by the S.U.Co., of Birmingham for the carburetter on the latest… | ||
| scan0192 | Customer's interest in fitting a new type of carburetter and smaller wheels to a 20/25 HP engine. | ||
| View original record | S/W. Hd from H. COPY. H4/MC7.7.34. GYZ-18 - Commander Holbrook. --------------------- Re: Hd/WW27/MW4.7.34. covering Hs/Rm7/KW4.7.34., please note in connection with the Hs/Rm suggestion that Sg. is… | ||
| scan0193 | Memo requesting further comments on paragraphs one and two of an attached document. | ||
| View original record | HSJ Rm. Please let us have your further comments in reply to paragraphs one & two of the attached copy of memo from H. HSy 12/7/34 | ||
| scan0194 | New carburetter and the suitability of smaller wheels for chassis GYZ-18. | ||
| View original record | 45080 To Hd. Hs/Rm.1/KW.16.7.34. Chassis GYZ-18. Commander Holbrook. Referring to H4/MC.7.7.34, we attach a copy of memo. Hs/Rm.7/KT.5.10.33 which we sent to Sales while Sg. was ill, which indicates… | ||
| scan0195 | Adjustment procedure for the 20/25 HP Carburetter, LOP E.60092, with a fully expanding throat and jet. | ||
| View original record | 45080 To Mx. EP. HS/CTS.10/KW.18.7.34. 20/25 HP. Carburetter, LOP: E.60092. Fully expanding Throat and Jet. Initial Adjustment. Low Speed Jet. Before starting the engine, the lock nut should be… | ||
| scan0196 | Preliminary design for a 20/25 HP air intake silencer, focusing on its felt lining. | ||
| View original record | To Hs/Rm. from E/PSN. 20/25 HP. Air Intake Silencer. We send you herewith a preliminary print of LeC.4043 of the air intake silencer for the 20/25. A scheme for covering the major portion of the top… | ||
| scan0197 | Alternative schemes for automatic idling control and requesting a patent novelty investigation. | ||
| View original record | x5080 To BY/NW. from E/PSN. c. For: Hs. By. E/PSN.6/HP.20.7.34. Automatic Idling Control. Further to E's memo E.S/HP.16.6.34, dealing with automatic chassis engine controls, we send you herewith… | ||
| scan0198 | From F. Dodd to RHC requesting an air silencer be made up to drawing LeC.4043 for fitting to a 20-G-IV. | ||
| View original record | To RHC. <5080> Hs/FD.2/KW.21.7.34. Will you please have an air silencer made up to LeC.4043, for fitting to 20-G-IV. The lining felt and cage will be supplied by Hs/FD. Hs/F.Dodd. | ||
| scan0199 | Requesting an update on the issue of sticky air valves. | ||
| View original record | COPY. S/W Wor....from C. C5/C23.7.34 Re STICKY AIR VALVES. +------- With reference to C17/C16.5.34 and Wor2/R23.5.34, I should be glad to know if anything has developed in regard to Sticky Air Valves,… | ||
| scan0200 | Solution for sticky air valves and a proposal to test a specific valve design on customer cars. | ||
| View original record | Miss Wilkinson (Exptl. Dept.) COPY. 15080 C. from Wor. Wor4/R.25.7.36 re Sticky Air valves. C5/623.7.34. We agree that this trouble is an aggravating one, but we have no cure which can be guaranteed.… | ||
| scan0201 | Depot sheet with running and maintenance notes for the new carburetter on the 20/25 HP chassis. | ||
| View original record | To Hd: 25080 Hs/Rm.17/KW.3.8.34. FOR DEPOT SHEET. 20/25 HP. Chassis - The New Carburetter. Series D.2. (Commencing Chassis GYD-22 and onwards). Summary of Running & Maintenance Notes. Herewith Depot… | ||
| scan0202 | Instructions for removing the intake and cleaning associated components. | ||
| View original record | -2- Hs/Rm.17/KW.3.8.34. (2) Remove the intake (L) which is secured by four bolts. When these bolts are removed the intake (L) should be lifted vertically slowly, and great care should be taken that… | ||
| scan0203 | Scheme for an automatic idling device fitted to the 20/25 horizontal carburetter. | ||
| View original record | X5080 URGENT. L.R. Smith To BY. from E/PSN. E/PSN.2/HP.3.8.34. c. Hs/Rm. RHC. Automatic Carburetter Controls. We send you herewith:- LeC.4072 showing a scheme for an automatic idling device fitted to… | ||
| scan0204 | Issue of sticking carburettor air valves on the 20/25 HP model and potential solutions. | ||
| View original record | COPY X 5080 S/W - Wor. from C. 6 C9/C22.8.34. Re 20/25 HP. Sticking Carburettor Air Valves. With reference to your Wor4/R25.7.34. I found the experimental air valve which you fitted to my car quite… | ||
| scan0205 | Concluding sentence of a letter requesting further consideration. | ||
| View original record | Perhaps you will kindly give this matter your further consideration and let me know. C. | ||
| scan0206 | Sticking carburettor air valves on the 20/25 HP model. | ||
| View original record | Hs/Rm. from Wor. Wor10/R.27.8.34. re: 20/25 H.P. Sticking Carburettor Air Valves. Please see C9/C22.8.34. attached, which kindly return to me with your reply in order that I may pass it on to C. It… | ||
| scan0207 | Follow-up request for a reply concerning sticking carburettor air valves on the 20/25 HP model. | ||
| View original record | X5080 Hs/Rm. from Wor. Wor4/R.3.9.34. Re: 20/25 H.P. STICKING CARBURETTOR AIR VALVES. Further to my Wor10/R.27.8.34., I shall be glad if you can now let me have a reply that I may pass on to C. Wor. | ||
| scan0208 | Issue of sticking air valves and recommending solutions for recurrent complaints. | ||
| View original record | K585D To Wor: from Hs/Rm. Hs/Rm.2/KW.5.9.34. Sticking Air Valves. Replying to Wor.10/R.27.8.34. We think that the only way in which we can help C. is to manufacture a few air valves similar to the one… | ||
| scan0209 | Blueprint of a modified air valve for a 25 HP engine with handwritten annotations. | ||
| View original record | Hs1224 VALVE TO BE MACHINED CONCENTRIC WITH GUIDES AFTER SLEEVE HAS BEEN SHRUNK IN. GUIDE PORTIONS TO HAVE .0005 - .001 DIAMETRICAL CLEARANCE THIS MEASUREMENT TO BE THE SAME AS STANDARD AEROT E55795… | ||
| scan0210 | Issue of sticking air valves in the 20/25 HP carburetter series. | ||
| View original record | X5080 C O P Y. 7.9.34. 20/25 HP. Sticking Air Valves (Carburetter Series). Re memo. C9/C.22.8.34, with special reference to par. 6. The recommendation in paragraph 6 is impracticable, as will be seen… | ||
| scan0211 | Requesting the fitting of a flexible petrol pipe from the filter to the carburetter on chassis 21-G-IV. | ||
| View original record | X5080 To RHC. HS/Dwg.10/KW.11.9.34. We hand you herewith one flexible Petrol Pipe which will you please have fitted to 21-G-IV whilst in the shop. The connection is from filter to carburetter. HS/Dwg. | ||
| scan0212 | Standardisation of a new carburetter to improve performance, slow running, and reduce cost. | ||
| View original record | RR 755A (5H) (57394. 30-1-34) BM 3/787/1. COMPLETED 20.9.34 20/25 STANDARDISATION OF PARTS. Date: 25.6.34 (24-8-34 crossed out) X No. 5080. Drawing No. Part List Description of Parts. NEW CARBURETTER.… | ||
| scan0213 | Cost estimation for extra jigs and tools, and a scrap cost notification for a modification to shock dampers on a 'D.2' series chassis. | ||
| View original record | Est. cost of extra jigs, tools and equipment (Sft/Ws.13.7.34)£767.0.0. A scrap cost of £400 has been notified in connection with bringing this modification together with the Controlled Shock Dampers… | ||
| scan0214 | Request to urgently manufacture a dozen air valves similar to one fitted to C's car. | ||
| View original record | Hs/Rm. Wor. absent. Hy8/R.20.9.34. Re: Sticking Air Valves - Hs/Rm.2/KW.5.9.34. Will you please make a dozen of the air valves similar to the one fitted to C's car, and advise me when these are ready… | ||
| scan0215 | The performance improvements of a new carburetter for the 20/25 HP model. | ||
| View original record | 45080 To Wor. from Hs/Rm. Hs/Rm.2/KW.21.9.34. 20/25 HP. New Type Carburetter. Referring to Cx.1/KW.13.9.34. This carburetter gives between 15 and 20% increase in power. This is equivalent to about 3… | ||
| scan0216 | Issue with new air valves sticking and the decision to modify them. | ||
| View original record | x5080 To Hy. Hs/Rm. 6/KW. 22.9.34. x7960 Sticking Air Valves. Referring to Hy.8/R.20.9.34, I heard from C. yesterday that one of the new type air valves which he has been running had stuck, and upon… | ||
| scan0217 | Alteration of 12 new air valves due to a sticking issue. | ||
| View original record | Hs. from Hy. Rm X5080 Hy13/R.25.9.34. Sticking Air Valves. I note the remarks in your Hs/Rm6/KW.22.9.34., and take it that the 12 new air valves which you are making will be altered and that you will… | ||
| scan0218 | Fault with the 20/25 HP carburetter, its symptoms, and cause. | ||
| View original record | To E. c. to Wor. c. to By c. to Mx. Carburetter (20/25 HP.) The new carburetter to LOP. E.60092 went into production on 18.7.34, starting on D.2 series, 1st chassis, commencing CYD-22. From the above… | ||
| scan0219 | Tests conducted on carburetor passages to rectify a fault, concluding a design change is necessary. | ||
| View original record | -2- It has been proved that the passage (1) is very sensitive at the opening (N) and it has been noticed on faulty carburetters that this opening is situated in a position slightly above the floor… | ||
| scan0220 | Cutaway blueprint diagram of a mechanical component with lettered and numbered callouts. | ||
| View original record | L, N, G, H, I, J, K, M, O, F, A, B, C, E, P, D, 1, 2, 3, C.T.S. | ||
| scan0221 | Air valve removed from a customer's car, replaced by an experimental one. | ||
| View original record | To Hd. X5080 Hs/Rm.15/KW.12.10.34. We are sending to you an air valve which was removed from Mr. Cowen's car and replaced by an experimental valve. This air valve is of no interest to us as it is… | ||
| scan0222 | Performance of the 20/25 HP chassis, carburetter improvements, and competitor comparison. | ||
| View original record | 25080 see 2013 - Paris Trials To Sg. from Hs/Rm. c.c. to Wor. c.c. to E. c.c. to Tr. Hs/Rm.SB/KW.15.11.34. 20/25 HP. Chassis. Replying to Sg.E/14.11.34. We think that your memo. Sg./E.14.11.34 covers… | ||
| scan0223 | Customer reactions to performance changes in new models, attributing initial negative feedback to comparisons with well run-in chassis. | ||
| View original record | -2- Hs/Rm.35/KW.18.11.34. When we make a small improvement in the performance of the chassis we seem invariably at its initial introduction to get the reaction that the car is not only not better than… | ||
| scan0224 | Customer's complaint about the performance of a 20/25 HP model following a carburetter change. | ||
| View original record | X5080 C.W.Hancock, Esq., Hotel de France, Chateauroux, Indre, France. Hs/Rm.1/KW.15.11.34. 20/25 HP. Performance. Sr. is complaining that the new 20/25 he has in France is not up to the performance of… | ||
| scan0225 | Complaint about the performance of a new carburetter and discussing a new bumper bar design for the 20/25 HP car. | ||
| View original record | W/P - Er. c. to Bs/GWH. Hs/Rm.2/KW.15.11.34. 20/25 HP. Performance. We understand from London that you are complaining of the performance of your new 20/25 car with the latest type of carburetter. All… | ||
| scan0226 | Customer complaint regarding the petrol consumption of a 25 HP car, chassis No. GWE-43. | ||
| View original record | COPY N-S....C. Re Technical - Petrol Consumption o 25 h.p.Cars. With reference to your C9/C14.11.34 chassis No. GWE-43 was brought in to us on Monday. The owner had taken delivery from Park Wards on… | ||
| scan0227 | Petrol consumption on 20/25 HP cars, referencing a report from Cricklewood. | ||
| View original record | X5080 S/W C1/C17.11.34 Re PETROL CONSUMPTION ON 20/25 h.p. CARS. ------------------------- I enclose herewith copy of report we have received from Cricklewood concerning the petrol consumption on… | ||
| scan0228 | Petrol consumption and comparing the performance of old and new carburetters on 20/25 HP cars. | ||
| View original record | 45050 W/S - C. Hs/Rm.7/KW.20.11.34. Petrol Consumption on 20/25 HP. Cars. Replying to C1/C17.11.34, we went into this question very thoroughly when we introduced the new carburetter, because Wor.… | ||
| scan0229 | Performance improvements for the 20/25 HP Chassis due to a new carburetter. | ||
| View original record | x5080 To Hs. from Sg. re 20/25 HP Chassis. Sg10/E22.11.34 Referring to the question of performance and Hs/Rm.35/KW.15.11.34, it is, I think, unfortunate that Sales were given information in… | ||
| scan0230 | 20/25 HP chassis, referencing information from the Experimental Department and a forthcoming report. | ||
| View original record | To Sg. from Hs/Rm. x5080 + 4015 Hs/Rm.6/KW.24.11.34. Re 20/25 HP. Chassis. Replying to Sg.10/E.22.11.34. The information given in Hy6/R.22.9.34. was obtained from the Experimental Dept. Actually the… | ||
| scan0231 | Results of a Bentley road test, focusing on wing/headlamp movement and engine performance. | ||
| View original record | COPY. X5080 Hotel Sylva Pergolese, 3, Rue Pergolese, Paris (XVI). To Hs/Rm. We have tried the Bentley to-day with the bumper bar and cross member fitted. The car was a bad one for wing and headlamp… | ||
| scan0232 | 'luffing' trouble with the 20/25HP Carburetter. | ||
| View original record | c. Hs. c. Dy. c. Sft. c. Wom. from Mr. Mx1/T5.12.34. 20/25HP CARBURETTER Referring to Experimental Report Hs/CTS24/KWS.10.34. We are having quite a lot of trouble on certain Production Carburetters to… | ||
| scan0233 | Issues and proposed modifications for the 20/25 HP carburetter. | ||
| View original record | X5080 To E. From Hs/Rm. c. to Wor. c. to By. c. to Mx. Hs/Rm.1/KW. 27.12.34. 20/25 HP. Carburetter. We have appreciated since the introduction of this carburetter that there is a tendency for it to be… | ||
| scan0234 | Carburetter issues for the 20/25 HP model, focusing on the float chamber and proposed modifications. | ||
| View original record | To E. cc S.S.G.S. From HS/CTS. NOR. BY. to NX. HS/CTS.2/KW.27.12.34. 20/25 HP. Carburetter. With further reference to our report HS/CTS.24/KW.8.10.34. In the above report we mentioned one of the… | ||
| scan0235 | Technical note detailing carburetter design changes, including the internal section and reversed throttle action. | ||
| View original record | -2- Internal Section. In returning to the square section for this type of carburetter, the effective capacity has been increased. This has been made possible by use of the R.R. type of damped air… | ||
| scan0236 | Modifications necessary for a 20/25 HP carburetter. | ||
| View original record | -3- HS/CTS.2/KW.27.12.34. 20/25 HP, Carburetter, LOP, E.60092. Details of Modifications necessary. Carb, body E.60068 modified to EX.15729. Suction Piston. The initial lift of .250" (present standard)… | ||
| scan0237 | Blueprint detailing modifications to a carburettor body component. | ||
| View original record | SECTION CHANGES IN THIS DISTANCE FROM CIRCULAR TO SQUARE Owing to insufficient clearance on the Deptd Carb. the Cyl. Head lips fouled at this point. The flange should be extended as shown by .150… | ||
| scan0238 | Note confirming discussions on modifications to the 20/25 HP horizontal carburetter. | ||
| View original record | To Hs/Rm. Copy to Wor. BY. Mx. ---------- K F D 5 D E/PSN.2/MN.1/1/35. 20/25 H.P. CARBURETTER. This note is to confirm our discussion on your Report, Hs/Rm.1/KW.27.12.34, on the subject of the… | ||
| scan0239 | Raising two questions about the process for modifications to the 20/25 HP carburetter. | ||
| View original record | Hs/Rm. E. c. By. o. Mx. Worl8/R.1.1.35. 20/25 H.P. CARBURETTER. Re Hs/Rml/KW.27.12.34. It seems to me that there are two questions to be answered, viz., (1) Is it not for the Experimental Department… | ||
| scan0240 | Test report on a 20/25 carburetter, detailing the effects of blanking the throttle edge and main jet supplies. | ||
| View original record | X5080 To E. from Hs/CTS. Hs/CTS.14/KW.S.1.35. 20/25 Carburetter (EX.15729). With further reference to our report Hs/CTS.2/KW.27.12.34. The changeover from the throttle edge to the main jet, as stated,… | ||
| scan0241 | Modifications and testing for the 20/25 HP carburetters. | ||
| View original record | x5080 To EH. from E. C.c. Hs/Rm. re 20/25 HP. Carburetters. This is to confirm that you will arrange with Mx. to try a certain number of 20/25 HP. carburetters with the vertical ventilation duct,… | ||
| scan0242 | Modifications and testing procedures for the 20/25 HP carburetter. | ||
| View original record | X5080 To Wor. from Hs/Rn. c. to E. c. to By. c. to HX. Hs/Rn.20/KW.8.1.35. 20/25 HP. Carburetter. Wor.18/R.1.1.35. There is no proposal that the modifications to the carburetter should not go through… | ||
| scan0243 | Modification scheme for the 20/25 Carburetter due to a production complaint. | ||
| View original record | 45080 To RHC. Hs/CTS.7/KW. 8.1.35. 20/25 Carburetter (LeC.3688). A scheme has now been issued by the Design Dept. (LeC.4292), showing a modification to deal with a serious complaint on the production… | ||
| scan0244 | Request to supply a set of parts for a new 20/25 carburetter being fitted to car G.U.B.5 for comparative tests. | ||
| View original record | x5080 RHC. From Hs/CTS. Hs/CTS.3/MA.15.1.35. 20/25 CARBURETTER. A new carburetter is being fitted to G.U.B.5 (Wor's car). Will you please supply a set of parts as shown on By/CS.6/EH.14.1.35. The… | ||
| scan0245 | Customer complaint regarding increased petrol consumption in a 25 HP car after fitting a new carburetter. | ||
| View original record | Hs. Hd/WTL/HR.16.1.35. re PETROL CONSUMPTION. 25 HP. ----------------------- We are rather concerned with the difference in the petrol consumption of the new carburetter as compared with that of the… | ||
| scan0246 | Comparing petrol consumption results between an old and a new type of carburetter for a 25 HP model. | ||
| View original record | X5080 To Hd. from Hs/Rm. Hs/Rm.6/KW.16.1.35. Re Petrol Consumption - 25 HP. Hd/WT.1/HR.16.1.35. Attached is a copy of a complete series of tests which were taken comparing the new type carburetter… | ||
| scan0247 | Carburetter hesitation issues and the testing of a float chamber balance scheme. | ||
| View original record | To E. c. to Wor. c. to By. c. to Mx. HS/CTS.27/KW.29.1.35. 20/25 Carburetter (LOP. E.60092). Float Chamber Balance LEC.4292. The above scheme has now been fully tested on the present standard… | ||
| scan0248 | Fault found on a test bed, detailing alterations to an air valve and the introduction of a new needle part. | ||
| View original record | -2- Hs/CTS.27/KW.29.1.35. This fault shows up better on the test bed whereas in the case of the previous fault, this could only be found on the bed under certain isolated conditions. By the alteration… | ||
| scan0249 | Blueprint of a suction piston for a 20/25 carburettor. | ||
| View original record | Hs.1725 2. TOP LANDS 2.622 DIA. -7/8 2.619 DIA. -1/2 2. BOTTOM LANDS SUCTION PISTON. 20/25 CARB H.J.S. | ||
| scan0250 | Petrol consumption tests comparing different carburettor setups and needles on a 25 HP engine. | ||
| View original record | 45080 To Hs/Rm. c. to Hs/CTS. Hs/GR.13/KW.1.2.35. Petrol Consumptions - GMD-20. 25 HP. Original old type R.R. carburetter refitted. This carburetter was the identical one removed for modification. On… | ||
| scan0251 | Petrol consumption tests for 25 HP vehicles comparing different carburetter and needle setups. | ||
| View original record | To Hs/Rm. c. to Hs/CTS. +5080 Hs/GR.12/KW.1.2.35. Report on Petrol Consumptions - 25 HP. (1) 20-G-IV. Fitted with EX.15792 Carburetter, (reversed throttle) XB7 needle. GMD-20. Standard, as received… | ||
| scan0252 | Test report comparing performance, weight, and component specifications for vehicles GMD-20 and 20-G-IV. | ||
| View original record | -2- Hs/GR.12/KW.1.2.35. (4) GMD-20. Carburetter LeC.4292 off 20-G-IV fitted as in test (2). 13.0 M.P.G./45.3 M.P.H./71 miles. -------------------- GMD-20. Total weight complete T. 1 cwts. 19 qrs. 3… | ||
| scan0253 | Petrol consumption test comparing chassis GMD-20 with GLB-30 and discussing the owner's preference for the older carburetter. | ||
| View original record | Hs. Hd/WT5/HR.4.2.35. re 25 HP. PETROL CONSUMPTION. Chassis No. GMD-20. -------------------------- We have taken a petrol consumption test since you returned the above car and have compared it with… | ||
| scan0254 | Petrol consumption and carburettor recommendations for a 25 HP car, model GMD-20. | ||
| View original record | To Hd/WT. Hs/Rm.24/KW.4.2.35. 25 HP. petrol Consumption - GMD-20. Replying to Hd/WT.5/HR.4.2.35. We recommend that the customer should have his standard carburetter back. If he is keen on petrol… | ||
| scan0255 | Withdrawing a suggested modification to the air valve on a 20/25 HP carburetter. | ||
| View original record | 45D80 To E. from HS/CTS. c. to Wor. c. to By. c. to MX. HS/CTS.5/KW.4.2.35. 20/25 HP. Carburetter. With further reference to HS/CTS.27/KW.29.1.35. We wish to withdraw the suggested modification… | ||
| scan0256 | Test report on a 20/25HP carburetter modification for fuel consumption and 'luffing' issues. | ||
| View original record | Hs/Rm from Mx. Mx20/T6.2.35. 20/25HP Carburetter with External Balance Pipe to Floatchamber. The carburetter fitted with the above scheme was handed to us several days ago. We have tried the… | ||
| scan0257 | Report on an external balance scheme for the 20/25 HP carburetter. | ||
| View original record | To E. c. to Wor. c. to By. c. to Mx. +5050 Hs/Rm.28/KW.7.2.35. 20/25 HP. Carburetter. Attached is a copy of a report we have had from Mx. on the external balance scheme fitted to the present 20/25… | ||
| scan0258 | Retrospective modification to the 20/25 HP carburetter float-chamber balance. | ||
| View original record | Rm x5080 To WOR. from E. E.5/HP.8.2.35. c. Hs. Ey. Mx. 20/25 HP. Carburetter. Floatchamber Balance LeC.4292. Referring to Hs/Rm.28/KW/7.2.35 and Mx.20/T.6.2.35, the point we have now to decide is to… | ||
| scan0259 | Internal memorandum regarding customer complaints of unsatisfactory petrol consumption on 20/25 HP models. | ||
| View original record | x5080 RM c. Hs/RM EP16/MH.11.2.35 re 20/25 H.P.PETROL CONSUMPTION -------------------- We are now receiving complaints from customers who have recently taken delivery of new cars, to the effect that… | ||
| scan0260 | Modification to the 20/25HP carburetter float chamber to address excessive petrol consumption. | ||
| View original record | X5080 [REDACTED] G. Hs [REDACTED] from Mx. Mx6/T11.2.35. 20/25HP Carburetter. Floatchamber Balance Lec.4292. E.5/HPS.2.35. We should like to see this modification brought on to Production as soon as… | ||
| scan0261 | Petrol consumption test results for a 20-G-IV vehicle with various carburetter configurations. | ||
| View original record | + 5080 To Hs/Rm. c.c. to Hs/CTS. Hs/GR.3/KW.12.2.35. Petrol Consumptions on 20-G-IV. Reversed throttle carburetter; XB7 needle; weak at low speeds. 30 MPH. constant/ ½ gallon/10.4 miles/20.8 MPG. Fast… | ||
| scan0262 | Performance results and flooding issues with Spectre carburetters on the 20/25 model. | ||
| View original record | To E. from Hs/Rm. c. to WoR. c. to By. x5050 Hs/Rm.9/KW.13.2.35. Spectre Carburetters. We are getting better results with the reversed throttle slow running on the 20/25 than we are with the normal… | ||
| scan0263 | Development work and improvements for Spectre carburetters. | ||
| View original record | To E. c. to Wor. c. to By. Spectre Carburetters. Little or no development work has been carried out on the Spectre carburetters in view of the fact that experiments were being carried out on the 25… | ||
| scan0264 | Carburetter design flaws, including flooding and throttle synchronisation issues. | ||
| View original record | -2- Hs/Swdl.10/KW.13.2.35. There is no petrol drain provided, either from the bottom of the throttle bore, or the air intake well in case of flooding. The petrol pipe nuts are very inaccessible below… | ||
| scan0265 | Better petrol consumption figures from reversed throttle carburetters compared to the standard 20/25 type. | ||
| View original record | x5080. To E. from Hs/Rm. Hs/Rm.14/KW.14.2.35: Reversed Throttle Carburetters. Herewith some figures which we have recently taken which show that we can get a better petrol consumption with the… | ||
| scan0266 | Petrol consumption for vehicle 20-G-IV, comparing two carburettor configurations. | ||
| View original record | Hs/GR.3/KW.12.2.35. Petrol Consumptions on 20-G-IV. Reversed Throttle Carburetter, XC1 needle, carburation O.K. 30 MPH. constant/ 1/4 gallon/ 11.4 miles/ 22.8 MPG. Fast run not exceeding 60 MPH/ 1/4… | ||
| scan0267 | Comparing petrol consumption test results for different carburettor setups on the 20-G-IV chassis. | ||
| View original record | To Hs/Rm. c. to Hs/CIS. Hs/GR.3/KW.12.2.35. Petrol Consumptions on 20-G-IV. Reversed throttle carburetter; XB7 needle; weak at low speeds. 30 MPH. constant/ ½ gallon/10.4 miles/20.8 MPG. Fast run not… | ||
| scan0268 | Test report comparing petrol consumption between a new modified carburettor and an old type carburettor on car 20-C-IV. | ||
| View original record | To Hs/Rm. c. to Hs/CTS. c. to Hd/WT. 45080 Hs/GR.9/KW.19.2.35. Petrol Consumption on 20-C-IV Axle Ratio 12 x 50; Tyres 6" x 18". The following test was carried out with the attendance of Mr. Trayner,… | ||
| scan0269 | Petrol consumption tests on a 20-G-IV model with a modified carburetter. | ||
| View original record | +5D8D To Hs/Rm. c. to Hs/CTS. Hs/GR.3/KW.25.2.35. Petrol Consumption on 20-G-IV. Axle Ratio 12 x 50: Tyres 6" x 18". 2nd Modified Carburetter to LeC.4292. Test carried out over Repair Route previously… | ||
| scan0270 | Inquiry regarding modifications to the 20/25 carburetter to improve consumption. | ||
| View original record | To Hs/Rm. from Sg. re 20/25. I saw something in a note the other day which was new to me about modifications to the 20/25 carburetter to improve consumption. Could you please let me know what it is… | ||
| scan0271 | Modification to the 20/25 HP Carburetter to resolve hesitation on pick-up. | ||
| View original record | To Sg. from Hs/Rm. +5080 Hs/Rm.9/KW.27.2.35. 20/25 HP. Carburetter. Replying to Sg.10/E.25.2.35. The modification to the 20/25 HP. Carburetter for which you have received a Standardisation Sheet… | ||
| scan0272 | Standardisation of a carburetter modified to LEC.4292 to address float chamber balance variations. | ||
| View original record | RR 755A (5H) (S7312, 29-12-33) BM 3/640/2 COMPLETED 1.3.35: 20/25 STANDARDISATION OF PARTS. Date 29.1.35. X No. 5080. Drawing No. Part List Handwritten date: 21.2.35 Description of Parts. CARBURETTER… | ||
| scan0273 | Cost estimate for extra jigs, tools, and equipment, including a cost comparison between an old and a new part. | ||
| View original record | Typed Text: Est. cost of extra jigs, tools and equipment (Sft/Ws.18.2.35) £4.0.0. Could be brought on to production at the 1st chassis in 'J' series, (Sft/GH.18.2.35) without scrap. Stamped Text:… | ||
| scan0274 | Carburettor modifications for the 20/25 HP car to improve petrol consumption. | ||
| View original record | x5080 S/W C1/C1.3.35. Re Modification to 20/25 h.p.Carburettor. Hs/Fm9/KW27.2.35 --------- We are pleased to note the modification you are making on the carburettor, and would like to get this fitted… | ||
| scan0275 | Modification schedule for 20/25 HP carburetters and addressing hesitation issues in the 40/50 carburetter. | ||
| View original record | W/S - C. X5080 Hs/Rm.14/KW.2.3.35. Re Modification to 20/25 HP. Carburetter. --------------------------------- Replying to C.1/C.1.3.35. LA. is arranging to have the Trials cars modified as parts… | ||
| scan0276 | Carburettor modifications and related arrangements for 20/25 HP and 40/50 HP models. | ||
| View original record | S/W C8/C6.3.35 Re Modification to 20/25 h.p.Carburettor. Hs/Rm14/KW2.3.35 ------- I note that you hope to have all the Trials cars fitted up with this modification in the course of the next fortnight.… | ||
| scan0277 | Carburettors for the 20/25 HP and Phantom models, consumption figures, and an investigation into a 40/50 model's hesitation issue. | ||
| View original record | W/S - C. X5080 Hs/Rm.6/KW.7.3.35. 20/25 HP. and Phantom Carburetters. C.8/C.6.3.35. If you have a record of the consumption of your Trials Cars you should be able to compare this with the figure you… | ||
| scan0278 | Carburetor comparisons for the 20/25 HP and Phantom models, and arranging a viewing for the 40/50 HP car. | ||
| View original record | Rm x5080 S/W C16/08.3.35 Re 20/25 h.p. & Phantom Carburettors. Hs/Rm6/KW7.3.35 ------- I expect we shall be able to make comparisons with our Trials cars after the changeover has been effected. In… | ||
| scan0279 | Graph plotting the effect on engine power output (B.HP vs R.P.M.) of a tank carburettor and air intake silencer. | ||
| View original record | EFFECT ON POWER OUTPUT OF TANK CARB AND AIR INTAKE SILENCER CARRIED OUT ON A PRODUCTION TEST BED ENGINE B.H.P. 80 70 60 50 40 30 20 R.P.M. 500 1000 1500 2000 2500 3000 3500 4000 STD CARB TANK CARB AIR… | ||
| scan0280 | Note regarding investigations into carburettor flooding on a 20/25 HP chassis. | ||
| View original record | S/W... [struck through text] c. to Spt. [struck through] Mr. [struck through] --> Hs/GWH. ---------- [Handwritten signature: Rm] [Handwritten, struck through text] [Handwritten: x508] [Handwritten:… | ||
| scan0281 | Request regarding the development of induction pipes for the 20/25 and Bentley models. | ||
| View original record | To RHC. x508 Hs/CTS.1/KW.4.4.35. Induction Pipe Development. We send you herewith :- Hs.1880. Modified induction pipe for 20/25. Will you please make the necessary detail drawing, instruct pattern,… | ||
| scan0282 | Test report on a downdraught twin Solex carburettor with a central water-heated manifold. | ||
| View original record | To Rm. c. to Hs/CTS. Hs/GR.14/KW.7.5.35. 18-G-IV. Downdraught Twin Solex with Central Water-Heated Manifold. The low speed jets were found to be too large for road work and were reduced from .021" &… | ||
| scan0283 | Reputational damage and a serious customer complaint regarding carburettors on the 20/25 HP car. | ||
| View original record | S/W....Wor. c. to Sg. E. -> Hs. Pl. Rm X508 C3/C17.5.35 (Dict.16th) Re 20/25 h.p. CARBURETTORS. We feel that we are losing quite a lot of the reputation of the 20/25 h.p. car with this carburettor… | ||
| scan0284 | Performance issues of a new carburettor, including poor fuel consumption and engine flooding. | ||
| View original record | Wor. -2- C3/C17.5.35 faster than the old one on pick-up, the customer not always appreciating that the car generally has gone up in weight, and seldom requiring the very slight improvement at high… | ||
| scan0285 | Car that would not start, with petrol pouring from the overflow pipe, and a note of a similar complaint. | ||
| View original record | Wor. -3- C3/C17.5.35 and would not start again. The Policeman and two chauffeurs helped to push the car to the side, where it was found that petrol was pouring out of the overflow pipe. The… | ||
| scan0286 | Test report on the performance of a Downdraught Stromberg Carburetter with a central heated small capacity manifold. | ||
| View original record | To Hs/Rmd. c. to Hs/CTS. X578 Hs/GR.10/KW. 27.5.35. 18-G-IV. Downdraught Stromberg Carburetter with Central Heated Small Capacity Manifold. This manifold was found to be worse than the large capacity… | ||
| scan0287 | Test report on a Downdraught Stromberg Carburetter with a Central Water Heated Floor Manifold, detailing faults and modifications. | ||
| View original record | 4506 To Hs/Rm: c. to Hs/CTS. Hs/GR.9/KW.27.5.35. 18-G-IV. Downdraught Stromberg Carburetter with Central Water Heated Floor Manifold. Further tests carried out show the main fault with this manifold… | ||
| scan0288 | Modifying an American carburetor by reducing its choke diameter. | ||
| View original record | -2- Hs/GR.9/KW.27.5.35. Owing to the fact that this American carb. has an integral cast choke of 1.5/16" dia., it was found impossible to reduce. By reducing the choke diameter, this fault would… | ||
| scan0289 | Request to supply a standard production 20/25 HP carburetter for fitting to an experimental car. | ||
| View original record | X508 Mr. Grayson. Hs/Wym.6/KW. 27.5.35. Will you please supply the Experimental Dept. with one of your standard production 20/25 HP. carburetters. This is required for fitting to Exptl. car 19-G-IV.… | ||
| scan0290 | Investigation into 20/25 carburetter flooding, potentially caused by engine oscillation from rubber mountings. | ||
| View original record | X508 W/S. To C. from E. c.c. Sg. Wor. Hs. Ey. Mx. T/Psn. E.1/HP.29.5.35. re 20/25 Carburetter Flooding. Confirming conversation with you yesterday re the above, it is very important that we should be… | ||
| scan0291 | On 20/25 HP carburetter flooding, proposing further tests related to a theory about rubber engine mountings. | ||
| View original record | 4508 W/S. To C. from E. E.2/HP.29.5.35. c.c. Eg. Wor. Hs. Hy. Mx. c/Fsn. re 20/25 HP. Carburetter Flooding. E.1/HP.29.5.35. I find we have the original carburetter which gave trouble on Major Monro's… | ||
| scan0292 | Carburettor flooding on a 20/25 HP model and its potential link to flexible engine mounting. | ||
| View original record | X508 B/W......E. c. to Sg. Wor. -> Hs. Ox. Mx. K/Psn. C18/C29.5.35 20/25 h.p.CARBURETTOR FLOODING. EI/HP29.5.35. I am very interested to note contents of your memo. I have also received your telephone… | ||
| scan0293 | Request for the manufacture of two sets of 25 HP carburetter parts to test variations in consumption at extreme drawing limits. | ||
| View original record | To RHC. 4508 HS/Swdl.3/KW.31.5.35. 25 HP. Carburetter. In order to find what the variation in consumption is with the drawing limits in the extreme, will you please make for us two sets of parts.… | ||
| scan0294 | Introduction and testing of a new float chamber petrol filter for the 20/25 carburetter. | ||
| View original record | To ~~BY.~~ Copy to ~~Wor.Hs.Mr.~~ HS/Rm. ~~----~~ x508 E/PSN.1/MN.31.5.35. 20/25 Carburetter. -------------------- We send you herewith LeC 4509 of a float chamber petrol filter for the above… | ||
| scan0295 | Arrangement of an experimental car for investigation of 25 HP carburettors. | ||
| View original record | W/S - C. c. to Wor. x508 Hs/Rm.10/KW.1.6.36. 25 HP. Carburetters. Replying to C.13/C.31.5.35. -in x560 The experimental car which we hoped to lend you while we were working on your own car will not be… | ||
| scan0296 | On the 20/25 Four Port Induction System, discussing test results and proposing a new heat control design using a Buick part. | ||
| View original record | To RHC. X508 Hs/Std.14/KW.3.6.35. 20/25 Four Port Induction System - Buick Heat Control for same. As a result of tests which have been carried out, it is found that the induction pipe to EX.18316 is a… | ||
| scan0297 | Development and testing of induction pipes for a larger bore 20/25 engine. | ||
| View original record | To RHC. From Hs/OTS. x508 Hs/CTS.1/MJ.3.6.35. INDUCTION PIPES. Out of the tests carried out so far, we have managed to produce some very promising results in an induction system for the larger bore… | ||
| scan0298 | Test report and specifications for a Zenith Carburetter Type 48V1-2 fitted to an 18-G-IV. | ||
| View original record | To Hs/Rm. c. to Hs/CTS. 4508 Hs/GR.7/KW.5.6.35. 18-G-IV. Zenith Carburetter; Type 48V1-2. Specification as received from test bed :- Choke 36 Main Jet 165 Comp.jet 150 Slow running 70 Cap. tube No. 1.… | ||
| scan0299 | Performance report on a Zenith 48V1-2 carburetter, detailing acceleration improvements and identified faults. | ||
| View original record | To Hs/Rm. c. to Hs/CTS. +508 Hs/GR.15/KW. 7.6.35. 18-G-IV. Zenith Carburetter, 48V1-2. Fitted to 18-G-IV with small capacity central water heated manifold and float chamber to the front of an engine.… | ||
| scan0300 | Letter to Zenith Carburetter Co. Ltd. detailing test results and remaining faults of the Carburetter Type 48V1-2. | ||
| View original record | x506 Exptl. Dept. HS/GR.14/KM. 7th June, 1935. The Zenith Carburetter Co.Ltd., 40-44, Newman Street, London, W.1. For the attention of Messrs. Palmer & Howell. Dear Sirs, Re Carburetter Type 48V1-2.… | ||
| scan0301 | Engine cut-out issues on a gradient and potential improvements with more economic settings. | ||
| View original record | -2- HS/GR.14/KM. 7.6.35. The worst condition is on a gradient at 4 m.p.h.; snap opening to 1/3 throttle; engine cuts out dead. As regards (2), this would be greatly improved with more economic setting… | ||
| scan0302 | Performance report on a Zenith Carburetter 48V1-2 fitted to an 18-G-IV engine. | ||
| View original record | To Hs/Rm. c. to HS/CTS. 7508 Hs/GR.15/KW.7.6.35. 18-G-IV. Zenith Carburetter, 48V1-2. Fitted to 18-G-IV with small capacity central water heated manifold and float chamber to the front of engine.… | ||
| scan0303 | Communication confirming car service details, including a carburetter comparison and adjustments to shocks and governor control. | ||
| View original record | W/S - C. X508 Hs/Rm. 20/KW. 7.6.35. Confirming our telephone conversation, we will let you have your car back immediately after the holidays. We have made a complete comparison of your present… | ||
| scan0304 | Investigation into the cause of carburetter flooding on the 20/25 HP model. | ||
| View original record | To Sg & Wor. L508 Hs/Rm.1c/KW.5.6.35. c. to C. c. to L. c. to Ry. c. to Hx. 20/25 HP. Carburetter Flooding. An examination of Sg's car, which was available for our inspection at Lillie Hall in a… | ||
| scan0305 | Fitting a filter to a carburetter pipe and investigating flexible mountings. | ||
| View original record | -2- HS/Ra.10/KM.8.6.35. Since it is going to be exceedingly difficult to ensure that the flexible pipe is perfectly clean, the filter recently designed to be located at the carburetter end of the… | ||
| scan0306 | Customer feedback on 20/25 HP petrol consumption and related flooding issues. | ||
| View original record | S/W...Wor. c. to E. Hs. C7/C8.6.35 Re 20/25 h.p. PETROL CONSUMPTION. Just to give you some idea of the sort of feeling customers have on this question of petrol consumption, I am an enclosing extracts… | ||
| scan0307 | Customer complaint letter from Sir Banister Fletcher regarding the poor petrol consumption of his new car. | ||
| View original record | COPY OF LETTER FROM Sir Banister Fletcher. 31.5.35 "I am very much exercised with the amount of petrol consumption of the new car which I have just bought. I find that including town and country work… | ||
| scan0308 | Float chamber petrol filter for the 20/25 Carburetter. | ||
| View original record | To DV. Copy to WGH. Hs. AHS. HW/BMT-MNC. X508 E/PSN.1/MN.31.5.35. 20/25 Carburetter. We send you herewith LeC 4509 of a float chamber petrol filter for the above carburetter. We should be pleased if… | ||
| scan0309 | Extract from a letter by J.A. Fraser Henderson regarding poor petrol consumption. | ||
| View original record | EXTRACT FROM LETTER FROM J.A.Fraser Henderson. 2.6.35 "I would also draw attention to the absurdly poor petrol consumption - worse than I used to get on a 40/50 h.p. 12 or 14 years ago. So far I've… | ||
| scan0310 | Customer complaints about petrol consumption in the 20/25 HP model and proposed actions. | ||
| View original record | W/S - C. c. to Wor. c. to E. X25 Hs/Rm.7/KW.12.6.35. 20/25 HP. Petrol Consumption. With reference to C7/C.8.6.35, the consumptions quoted by the two owners are of course lower than the best that we… | ||
| scan0311 | Carburetter flooding on the 20/25 HP model and the need for a filter. | ||
| View original record | To Wor. from Sg. Copy to Hs/Rm.C. E.By.Mx. 20/25 HP Carburetter Flooding. Referring to Hs/Rm.10/KW.8.6.35 this report is very interesting and brings home the importance of our having as quickly as… | ||
| scan0312 | Tests to weaken the mixture of the 20/25 HP Carburetter. | ||
| View original record | Rms Wyman x508 noted Gason To Hs. from E. E.1/HP.12.6.35. c. Sg. Wor. By. Mx. E/Psn. re 20/25 HP. Carburetter. ------------------------- We should like to have tests made with the controls set so as… | ||
| scan0313 | Causes and solutions for carburetter flooding in a 20/25 HP model. | ||
| View original record | Wyman Wood X508 E.2/HP.12.6.35. W/S. To G. from E. c. Sg. Wor. Hs. Byr. Mx-E/Psn. re 20/25 HP. Carburetter Flooding. It has now been clearly demonstrated at the Works that the so called full bore… | ||
| scan0314 | Internal correspondence concerning petrol consumption and carburettor issues for several customers. | ||
| View original record | S/W....Hs/Rm c. to Wor. E Re 20/25 h.p. PETROL CONSUMPTION. Hs/Rm7/KW12.6.35 -------- C18/C13.6.35 We shall be very glad for your man Whyman to attend to the cars; if you will please let me know what… | ||
| scan0315 | Modification to the drilling of petrol holes for the 20/25 Horizontal Carburetter. | ||
| View original record | X508 E/PSN.1/MN.13.6.35. To BY. Copy to Hs/Rm. NHC. Mac R Wyman noted [Signature] 20/25 Horizontal Carburetter. -------------------------- We send you herewith LeC 4546 showing a modification to the… | ||
| scan0316 | Blueprint for a modification involving inclined drillings in a float-chamber needle seating for a horizontal carburettor. | ||
| View original record | THIS MODIFIES LEC 4509. Le C 4546. THIS MODIFICATION IS INTENDED TO PREVENT DIRT BEING RETAINED AT THE NEEDLE SEAT, AS OCCURS WHEN THE BOTTOMS OF THE HOLES ARE ABOVE THE HORIZONTAL FACE. 4 HOLES DIAM… | ||
| scan0317 | 20/25 model petrol consumption and the dispatch of a carburetter for testing on various customer cars. | ||
| View original record | X508 W/S - C. c. to Mor. c. to R. c. to Br. HS/Rm.6/KW.14.6.35. 20/25 Petrol Consumption. C.18/C.13.6.35. Replying to your note, we have to-day despatched a carburetter to Cricklewood, marked for the… | ||
| scan0318 | Carburetter changes and petrol consumption for the 20/25 model for various customers. | ||
| View original record | S/W. Hs/Rm. from C. copy to Wor. " " E " " BY. X508 C10/D17.6.35. Re: 20/25 Petrol Consumption. With reference to Hs/Rm6/KW.14.6.35, I note that you have despatched a carburetter to Cricklewood to… | ||
| scan0319 | Note regarding sending a filter for chassis GAE-19 and another set for a different car. | ||
| View original record | S/W. x580 C30/D17.6.35. Re: Chassis GAE-19. With reference to Hs/Rm.7/KW.13.6.35, I note that you will be sending down the filter for the above car as soon as they are ready, and also a set to fit to… | ||
| scan0320 | Carburetter flooding on the 20/25 HP model and suggesting a depot sheet for modifications. | ||
| View original record | S/W. E. from C. copy to Sg., Wor., Hs. BY., Mx., E/Psn. Hs. Rm X528 C1/D19.6.35. Re: 20/25 h.p. Carburetter Flooding. E.2/HP.12.6.35. We note you set out the two modifications that you are making to… | ||
| scan0321 | Arranging for a car test on chassis GLG-3 for Sir Banister Fletcher. | ||
| View original record | S/W. Hs/Rm. from C. [Handwritten: Rm x508] C13/D20.6.35. Re: Chassis GLG-3. - Sir Banister Fletcher. Confirming our conversation on the telephone this morning, Sir Banister will let us have his car… | ||
| scan0322 | Arranging for consumption tests and a new carburetter fitting on Sir Banister Fletcher's car. | ||
| View original record | W/S - C. c. to Br. x508 Hs/Gry.16/KW. 21.6.35. Thank you for your memo. re Sir Banister Fletcher's car. We have arranged for someone to be at Cricklewood early on Monday morning so as to have the… | ||
| scan0323 | Request for additional sets of photomicrographs concerning foreign matter from a flexible petrol pipe. | ||
| View original record | To Hl. (Laboratory). X508 Hs/Wym.1/KW.26.6.35. Foreign Matter from Flexible Petrol Pipe. Hl.3/AG.12.6.35. Will you please supply 5 more sets of the photomicrographs A.1236/7/8, which accompanied the… | ||
| scan0324 | Confirming modifications for the 20/25 model to address carburetter flooding. | ||
| View original record | X508 W/S. To C. from E. c. Sg. Wor. Hs. Ev. Mx. E/Fent. E.3/NP.26.6.35. re 20/25 Carburetter Flooding. Replying to your memo O.1/D.19.6.35, it has already been arranged that a depot sheet will be… | ||
| scan0325 | Modifications and settings for a Stromberg automatic choke and fast idle device. | ||
| View original record | To Hs/Rm. c. to Hs/CTS. X506 Hs/GR.14/KW.26.6.35. 20-G-IV. Stromberg automatic choke and fast idle device fitted to Stromberg downdraught carburetter. Fast idling set to 15 m.p.h. approx. Suction… | ||
| scan0326 | Urgent request to expedite five flexible pipes with filters for 25 HP chassis due to carburetter flooding. | ||
| View original record | N/W - Hs. Rm Urgent x508 Br6/W.27.6.35. file. Technical 25 h.p.Chassis. Re - Carburetter Flooding. Can you please expedite the five flexible pipes together with the filters which I understand you are… | ||
| scan0327 | Sending five sets of photomicrographs related to foreign matter in a flexible petrol pipe. | ||
| View original record | x508 M1052a. To Hs/Wym. HL2/AG.27.6.35. Laboratory. Re: Foreign Matter from Flexible Petrol Pipe. (Your ref: Hs/Wyml/KW.26.6.35) As requested we send herewith five more sets of photomicrographs Nos.… | ||
| scan0328 | The testing of 20/25 Carburetter Filters before fitting to customer cars. | ||
| View original record | W/S - C. x508 Hs/Rm.21/KW.27.6.35. 20/25 Carburetter Filters. We rushed one of these filters off for Sg's car last week, but we have never yet had one on an Experimental car to test. We are getting… | ||
| scan0329 | Carburetter flooding on the 20/25 HP model, arranging modifications and part supply. | ||
| View original record | Wor. [crossed out] C. BY. E. Hs/Rm. from Sft. X508 Sft.1/EMG.27.6.35. 20/25 HP. CARBURETTER FLOODING. I have received memo' Wor7/R.26.5.35. and the necessary drawings for this job were received from… | ||
| scan0330 | Laboratory memo about photomicrographs of foreign matter found in flexible petrol pipes. | ||
| View original record | To Hs/Rm. L508 M1052b. HL3/AG.27.6.35. Laboratory. Foreign Matter from Flexible Pipes. We send herewith photomicrographs of the samples of fibre, metallic particles, etc. removed from 20/25 HP. and… | ||
| scan0331 | Fitting and performance of carburettor filters on 20/25 HP customer cars. | ||
| View original record | Handwritten top left: MS/W Replacement instructed Handwritten top center (in red, crossed out): Rem Bury Handwritten top right: C2/C28.6.35. File Typed: Re 20/25 h.p. CARBURETTOR FILTERS.… | ||
| scan0332 | Request for 8 sets of Photomicrographs Nos. A.1246/7 to be supplied to the Laboratory. | ||
| View original record | Mr. Whitehead (Laboratory) X508 Hs/Bwg.22/KW.28.6.35. Will you please supply us with a further 8 sets of Photomicrographs Nos. A.1246/7, as soon as possible! Hs/Bwg. | ||
| scan0333 | Urgent request for further photomicrographs related to foreign matter in flexible petrol pipes. | ||
| View original record | Mr. Hall (Laboratory). [Handwritten: X 508] Hs/Wym.9/KW.28.6.35. Foreign Matter from Flexible Petrol Pipes: Will you please supply three further sets of Photomicrographs A.1236, A.1237 & A.1238. These… | ||
| scan0334 | Petrol consumption and carburetter flooding issues for the 20/25 HP model. | ||
| View original record | X508 To C. from Hs/Rn. C. to Sg. C. to Wor. C. to R. C. to Hy. C. to Ml. C. to Hr. Petrol Consumption & Flooding - 20/25 HP. Carburetter. Attached is a report on the work so far done on carburetter… | ||
| scan0335 | Carburetter consumption issues, potential modifications, and mixture control systems. | ||
| View original record | -2- Summarising the present position, therefore, if complaints are received about carburetters without the outside balance pipe, this modification can be fitted to improve the consumption. If… | ||
| scan0336 | Investigation into complaints of poor petrol consumption and flooding in 20/25 HP carburetters. | ||
| View original record | Ha/Wym.15/KW.25.6.35. 20/25 HP. Carburetters. We have been investigating the complaints with regard to the above carburetters, namely, poor petrol consumption and flooding. Dealing firstly with the… | ||
| scan0337 | Table comparing petrol consumption figures for various cars and carburettor setups over different routes. | ||
| View original record | -2- He/Wym.15/KW.25.6.35. Petrol Consumptions. Table Columns (Routes): 1. Derby, Leciester, Ashby, Burton, Derby. (Average Speed 30 m.p.h.) 2. Cricklewood, St. Alban's, Dunstable & return. (Average… | ||
| scan0338 | Comparison of performance and fuel consumption between a new and old type carburetter, including acceleration test data. | ||
| View original record | -3- From the above figures it can be seen that driving under all normal conditions one can obtain a petrol consumption of approx. 16 m.p.g. with the new type carburetter with of course the outside… | ||
| scan0339 | Investigation into carburetter flooding caused by foreign matter originating from the flexible pipe. | ||
| View original record | -4- We next turned our attention to the complaint of flooding. The first carburetter that we actually saw flooding badly was the one fitted to Sg's car, at Lillie Hall, and at first sight it gave one… | ||
| scan0340 | Micro-examination report on foreign matter found in a flexible petrol pipe. | ||
| View original record | Micro-Examination Report. M1052. To Hs/Rm. HL3/AG.12.6.35. Laboratory. FOREIGN MATTER FROM FLEXIBLE PETROL PIPE. Three photomicrographs have been taken of the specimens examined last Saturday. These… | ||
| scan0341 | Laboratory photomicrograph showing various particles at 10 diameters magnification. | ||
| View original record | R.R. 403 (5H) (62316 13-4-34) J.H.,Ltd. ROLLS-ROYCE LTD. LABORATORY. PHOTOMICROGRAPH No A1236 MAGNIFICATION: 10 DIAMETERS. | ||
| scan0342 | Laboratory photomicrograph of a sample at 10 diameters magnification. | ||
| View original record | R.R. 403 (5H) (62316 13-4-34) J.H.,Ltd. ROLLS-ROYCE LTD. LABORATORY. PHOTOMICROGRAPH NO A1.237 MAGNIFICATION : 10 DIAMETERS. | ||
| scan0343 | Laboratory photomicrograph report with magnification details. | ||
| View original record | R.R. 403 (5H) (62316 13-4-34) J.H.,Ltd. ROLLS-ROYCE LTD. LABORATORY. PHOTOMICROGRAPH No A1238 MAGNIFICATION: 10 DIAMETERS. | ||
| scan0344 | Tests investigating foreign matter from flexible petrol piping causing flooding in 20/25 HP and Bentley carburettors. | ||
| View original record | HM/Dwg.15/RH/20.6.35. Flexible Petrol Piping. With reference to the above, and recent flooding trouble experienced on the 20/25 HP. and Bentley carburettors. Tests have been carried out to ascertain… | ||
| scan0345 | Laboratory photomicrograph showing a sample of fibrous and particulate material at 10x magnification. | ||
| View original record | R.R. 403 (5H) (62316 13-4-34) J.H.,Ltd. ROLLS-ROYCE LTD. LABORATORY. PHOTOMICROGRAPH NO A1.246 MAGNIFICATION: 10 DIAMETERS. | ||
| scan0346 | Photomicrograph showing a tangled mass of fine fibres or filaments magnified by 10 diameters. | ||
| View original record | R.R. 403 (5H) (40395 31-1-32) J.H, D. ROLLS-ROYCE LTD. LABORATORY. PHOTOMICROGRAPH No. A1.247 MAGNIFICATION: 10 DIAMETERS. | ||
| scan0347 | Requesting additional pipe castings and preparation of carburettor controls for specific car chassis. | ||
| View original record | To RHC. X506 Hs/Std.6/KW.28.6.35. 20/25 INDUCTION PIPE & EXHAUST MANIFOLD TO Hs.2014. The above pipes are the ones which are to be fitted to Wor's car. We should like you to take three castings from… | ||
| scan0348 | Brief summary of road tests on 6-port induction manifolds. | ||
| View original record | To Hs/Rm. c. to Hs/CTS. X508 Hs/GR.4/KW.29.6.35. 18-G-IV. Brief Summary of Road Tests on 6-Port Induction Manifolds. (1) Standard Bentley manifold with two Spectre carburetters; even slow running at 4… | ||
| scan0349 | Foreign matter from a flexible petrol pipe, confirming the dispatch of three sets of photomicrographs. | ||
| View original record | X508 To Hs/Wym. HL2/AG.29.6.35. M1052A. Laboratory. Foreign Matter from Flexible Petrol Pipe. (Your ref: Hs/Wym9/KW28.6.35) Herewith three sets of photomicrographs Nos. A1236/7/8, as requested. Hl. HE | ||
| scan0350 | Cover note for photomicrographs regarding foreign matter found in flexible petrol pipes. | ||
| View original record | To Hs/Bwg. x508 HL3/AG.29.6.35. M1052c. Laboratory. Foreign Matter from Flexible Petrol Pipes. (Your ref: Hs/Bwg22/KW.28.6.35) Herewith eight sets of photomicrographs Nos. A1246/7 as requested. Hl. Hl | ||
| scan0351 | Confirming the testing and approval of a new carburetter filter scheme for the 20/25 model after a small modification. | ||
| View original record | W/S - C. 1508 Hs/Rm.4/KW.1.7.35. Carburetter Filters. We have tested the new scheme of carburetter filter on the 20/25, and have had to make one small modification. All the sets that are despatched… | ||
| scan0352 | Tests on induction pipes for the placement of a 'Stromberg' automatic choke and instructions to alter an exhaust manifold. | ||
| View original record | To RHC. 2508 Hs/CTS.3/KW.1.7.35. Induction Pipes. We hand you herewith Hs.2052. Ex.18316/7 we know now the approximate position for placing the "Stromberg" automatic choke, and "Fast-Idle" device.… | ||
| scan0353 | Standardisation sheet for modifications to the 20/25 HP floatchamber filters. | ||
| View original record | W/S - C. X508 Hs/Bwg.19/KW.1.7.35. Re 20/25 HP. Floatchamber Filters. C2/C.28.6.35. We are issuing a Standardisation Sheet for the above scheme, Lec.4509. There is, however, a slight modification to… | ||
| scan0354 | Alteration to the 20/25 HP carburetter float chamber seating and a request for 6 replacements. | ||
| View original record | To RHC, c. to Ms/Std. +50% Hs/BwG.20/KW.1.7.35. 20/25 HP. Carburetter Float Chamber Seating, to scheme Lec.4509. There has been an alteration to the above needle E.60575 - 17561 whereby the escape… | ||
| scan0355 | Standardisation sheet for 20/25 HP carburettor filters and modified seatings. | ||
| View original record | S/W x508 C12/C2.7.35 Re 20/25 h.p.CARBURETTOR FILTERS. Hs/Rm4/KW1.7.35 & Hs/Bwg19/KW1.7.35 ---------------- We note you have now issued a standardisation sheet for the above scheme, including modified… | ||
| scan0356 | Request to make and alter 25 HP carburetter parts for testing purposes. | ||
| View original record | To RHC, x508 Hs/GR. S/KW. 3. 7. 35. 25 HP. Carburetter. Will you please make and alter the following parts respectively for test purposes :- 3 off E.59797 (counterbore deleted). 3 Needles XC2 supplied… | ||
| scan0357 | Test results and feedback concerning petrol consumption and flooding on a 20/25 HP carburettor. | ||
| View original record | S/W....Hs/Rm c. to Sg. Wor. E. By. Mx. Br. Rm x508 PETROL CONSUMPTION & FLOODING. 20/25 h.p.CARBURETTOR. -------- I beg to acknowledge receipt of your Hs/Rm14/KW28.6.35. I am very interested to note… | ||
| scan0358 | Consumption tests for a 20/25 HP carburetter (19-G-IV) with parts machined to rich and weak limits. | ||
| View original record | To Hs/Rm. c. to Hs/CTS. c. to Hs/Swdl. c. to Hs/Wym. Hs/GR.21/KW.3.7.35. 20/25 HP. Carburetter (19-G-IV). Consumption tests carried out with the following parts machined at maximum and minimum limits.… | ||
| scan0359 | Decisions on manufacturing limits for the 20/25 carburetter. | ||
| View original record | To HY: Copy to Mr. OFV Ha/Rm. Handwritten notes: X50 / E/PSN.1/MN.8.7.35. H. Wyman } Any comment? Release - ? O.K GAD T. Salt } O.K. BUS 20/25 CARBURETTER. ------------------- At a meeting held on… | ||
| scan0360 | List of agreed-upon modifications and improvements for a carburetter. | ||
| View original record | -2- It was also decided to improve the method of centring the jet housing in the carburetter casting by using an arbor centred from the air valve guide to locate the outer jet bush. 5. It was agreed… | ||
| scan0361 | Modifications to the induction pipe and exhaust manifold for a 20/25 engine. | ||
| View original record | To E. X508 Hs/Rm.3/KW.9.7.35 E/Psn. asked me for a drawing of the induction pipe we are running on the large bore 20/25. Here is a print of the one we have got at present on 20-G-IV. We are making… | ||
| scan0362 | Potential trouble with the 4-port pipe system on the 20/25 model, requesting an investigation into sliding joints. | ||
| View original record | X508 To RHC. Hs/Rm.18/KW.9.7.35. We anticipate that we may have trouble with the existing pipe on the 4-port system on the 20/25. We should like you to look into the question of getting sliding joints… | ||
| scan0363 | Requesting five sets of induction pipes for the Large Bore 20/25's model. | ||
| View original record | To RHC. c. to Hs/Gry. c. to Hs/CTS. X508 Hs/Rm.11/KW.17.7.35. Induction Pipes for Large Bore 20/25's. We require 5 sets in all of the induction pipe and exhaust pipe set up as fitted to 18-G-IV at… | ||
| scan0364 | Requesting a slotted suction piston for a 20/25 carburetter to improve starting. | ||
| View original record | To RHC. X508 Hs/Wym.7/KW.19.7.35. 20/25 Carburetter. We wish to try the effect of a slotted suction piston on the above carb. for improved starting up. Will you please supply us with one suction… | ||
| scan0365 | Test report on a Stromberg DA-42 carburettor, detailing issues, adjustments, and comparison to another model. | ||
| View original record | To Hs/Rm. c. to Hs/CTS. Hs/GR.14/KW.6.8.35. Stromberg DA-42; 18-G-IV. The following tests were carried out on the above. The main metering jet was finally set at 064 and is at present fitted with a… | ||
| scan0366 | Recommendation for an insulating washer and the present specification of a Stromberg carburetter. | ||
| View original record | -2- Hs/GRJ4/KW.6.8.35. The Stromberg representative recommends an insulating washer at the manifold flange of no less thickness than 0.75". Present specification of carburetter :- Seating 130 Choke 1… | ||
| scan0367 | Request to modify two 20/25 HP carburetters taken from customers' cars to current production standards. | ||
| View original record | x508 Mr: Grayson. Hs/Wym.ll/KW. 7. 8. 35. 20/25 HP. Carburetters. We hand you herewith 2 carburetters which have been taken off customers' cars. We would like you to fully modify both of them by your… | ||
| scan0368 | Dimensions for the new XC3 carburetter needle for the 20/25 HP model to improve petrol consumption. | ||
| View original record | 4508 To By. c. to E. c. to Slt. c. to Mx. HS/Wym.2/KW. 6.8.35. 20/25 HP. Carburetters. With the improved method of manufacturing carburetters in the works, having given us some form of consistency, we… | ||
| scan0369 | Internal order for a 20/25 HP carburetter for fitment to a 21-G-IV car. | ||
| View original record | Mr. Grayson. X508 Hs/Wym.4/KW. 8. 8. 35. 20/25 HP. Carburetters - Order No. 54105. Will you please supply the Exptl. Dept. with one new 20/25 HP. Carburetter built up to your latest specification.… | ||
| scan0370 | Outlining a series of proposed tests for induction system development. | ||
| View original record | To Hs. | ||
| scan0371 | Standardisation proposal for a flexible petrol pipe with a filter to the float chamber to prevent carburettor flooding. | ||
| View original record | RR 755A (SH) (57312, 29-12-33) BM 3/640/2 COMPLETED 4.9.35. 20/25 STANDARDISATION OF PARTS. Date 16-8-35 2.7.35. X No. 508. Drawing No. Part List Description of Parts. FLEXIBLE PETROL PIPING… | ||
| scan0372 | Cost estimate for extra jigs, tools, and equipment relating to a modification already in production. | ||
| View original record | Est. cost of extra jigs, tools and equipment (Sft/Ws.12.8.35)£18.0.0. This modification is already on production. All cars being changed from 181st in "D" series. STAMP: RECEIVED 8 JUL 1935 W O… | ||
| scan0373 | Test report on the performance and carburation issues of a Stromberg downdraught carburetter. | ||
| View original record | To Hs/Rm: X508 Hs/Gry.2/KW.9.9.35. 20-G-IV. 3 1/4" bore fitted with Stromberg downdraught carburetter. Mileage 769. Petrol used - 47 gallons. Consumption - 16.35 m.p.g. Oil used - about 2 1/2 gallons.… | ||
| scan0374 | Request for the production of three Hs.2075 induction pipes for the Large Bore 20/25 model. | ||
| View original record | To RHC. X528 Hs/CTS.9/KW.16.9.35. Large Bore 20/25. The pattern for the latest induction pipe Hs.2075, should now be in hand. Will you please produce three of these pipes as soon as possible.… | ||
| scan0375 | Test report and specification for Stromberg carburetter D.B.42. | ||
| View original record | To Hs/Rm. c. to HS/CTS. 4508 Hs/GR. S/KW.16.11.35. 18-C-IV. Latest type Stromberg carburetter D.B.42 with fast idle and automatic choke unit built in casting. Carburation O.K. throughout range with… | ||
| scan0376 | Material changes and standardisation of parts for air silencers on Big Bore Bentley and 20/25 HP models. | ||
| View original record | 4508 To By & E. Hs/Wym.12/KW.19.11.35. Re Big Bore Bentley & 20/25 HP. Air Silencers. With regard to the instructions already given for the above air silencers, we would point out that we have now… | ||
| scan0377 | Modifications to a Stromberg D.B.42 carburetter to address weakness at part throttle. | ||
| View original record | To Hs/Rm. c. to Hs/CTS. x508 Hs/GR.12/KW.20.11.35. 18-G-IV. Stromberg carburetter D.B.42, strengthened up to overcome weakness at part throttle 30-45 m.p.h. Consumption checked at 16 m.p.g. average… | ||
| scan0378 | 25/30 HP induction pipes and a scheme to address issues with the Stromberg downdraught carburetter. | ||
| View original record | To RHC. x508 Hs/CTS.12/KW.5.12.35. 25/30 HP. Induction Pipes. We send you herewith Rm.29 scheme, which shows our first attempt at developing a well in the induction pipe to cope with the troubles… | ||
| scan0379 | Complaints of poor petrol consumption on 20/25 HP carburettors and outlining the modification required. | ||
| View original record | X508 To Hd. for Depot Sheet. Hs/Wym.7/KW.7.12.35. 20/25 HP. Carburetters. With regard to complaints of poor petrol consumption on the above carburetters, we would refer you to our memo.… | ||
| scan0380 | Request to modify the air intake bend for a 25/30 HP engine. | ||
| View original record | To RHC. x508 Hs/CTS.9/KW.9.12.35. 25/30 HP. Will you please modify the air intake bend Ex.19465 to Rm.30. Only the modified requirements are shown on this sketch. Hs/C.T.Salt. | ||
| scan0381 | Insulating washer for the 25/29 induction system and instructions for ordering it from a supplier for experimental purposes. | ||
| View original record | To RHC. x508 E/PSN.2/MN.18.12.35. Copy to EY. Hs/Rm. Hw/Catt. 25/29 Induction System. Rm We send you herewith a print of RS 100 of an insulating washer between the induction pipe and the carburetter… | ||
| scan0382 | Cold start tests performed on a Stromberg Carburetter at various low temperatures. | ||
| View original record | K 508 To Hs/Rm. Hs/GWH.12/KW. 21.12.35. 21-G-IV. Stromberg Carburetter. We have made three cold starts with the Stromberg Carburetter. (1) Three seconds were taken to start the engine. Air temperature… | ||
| scan0383 | Carburetter petrol filter and gauze sample for a 25/29 HP chassis. | ||
| View original record | To HY. Copy to REC. Hs/Rm. Hsw/Sect. X508 E/PSN.1/MN.21.12.35. URGENT. Carburetter Petrol Filter. 25/29 H.P. We send you herewith LeC 4886 of the carburetter petrol filter for the above chassis,… | ||
| scan0384 | Reply concerning petrol consumption and carburetter modifications for the 20/25 model. | ||
| View original record | W/S - Cx. X508 Hs/Rm.9/KW.3.1.36. Petrol Consumption - 20/25. Replying to Cx.1/KW.31.12.35. The X.C.3 needle cannot be fitted to one of the old type carburetter without them being returned to the… | ||
| scan0385 | Tests on an induction pipe for a 25-30 HP engine, requesting a celluloid window be fitted. | ||
| View original record | X508 To RHC. Hs/CTS.4/JH.6.1.36. 25-30 HP Engine. Re the induction pipe Ex21111 promised for Jan.11th. On this pipe the tests will be carried out to release the induction system for production. Will… | ||
| scan0386 | Proposal to change the induction pipe material from cast iron to aluminium for the 25-30 HP chassis. | ||
| View original record | Handwritten: G.W.H. Is the pipe on 21.GU brass or alum Rm. X5D8 Typed: BY. c. Hs. Hs/CTS. Da. E/JNR. Induction Pipe - 25-30 HP. Chassis. We find the above has been instructed by us in cast iron… | ||
| scan0387 | Specification for a DA-42 Stromberg Carburetter fitted to a 18-G-IV (Large Bore) engine. | ||
| View original record | To Hs/Rm. c. to Hs/CTS. x595 Hs/GR.11/KW.11.1.36. 18-G-IV (Large Bore). Specification of DA-42 Stromberg Carburetter fitted. Choke and fast idle device brought up to date. R.S.100 asbestos washer… | ||
| scan0388 | Final specification and performance report for a Stromberg carburettor on a 21-G-IV (Large Bore) engine. | ||
| View original record | To Hs/Rm. c.c. to Hs/CTS. X508 Hs/GR.3/KW.13.1.36. 21-G-IV (Large Bore). Final specification of Stromberg carburetter DA-42, as fitted to suit larger bore manifold and turbulent head. Choke 1 1/4"… | ||
| scan0389 | Modifications and settings for a Stromberg DA-42 carburetter on car 20-G-IV. | ||
| View original record | x508 To Hs/Rm. c. to Hs/CTS. Hs/GR.2/KW.13.1.36. 20-G-IV. The Stromberg carburetter DA-42 on this car was brought up to date in setting and controls etc. The water temperature only averaged 70°C. and… | ||
| scan0390 | Specification and modifications for a DB-42 Stromberg Carburetter. | ||
| View original record | To Hs/Rm. c. to Hs/OTS. x500 Hs/GR.1/KW.13.1.36. 19-G-IV. Specification of DB-42 Stromberg Carburetter fitted. Choke 1 1/4" dia. Main metering jet .062. Bypass jet .048. Main discharge tube with… | ||
| scan0391 | Request to produce six sets of modified induction and exhaust systems for the 25/30 HP engine. | ||
| View original record | X5D8 To RHC. Hs/CTS.19/KW.17.1.36. 25/30 HP. We have carried out a series of tests on the induction pipe it is proposed to standardise for the above engine. So far, the results are good. The fault of… | ||
| scan0392 | Specifications for a DA.42 Stromberg carburetter, including jet sizes and a modification to the jump link split pin. | ||
| View original record | x508 To Hs/Rm. c. to Hs/CTS. Hs/GR:9/JH. 22.1.36. 22-G-V. Unit C-16. Specifications of DA.42 Stromberg carburetter fitted. Choke 1 1/4" dia. Main metering jet .064. Bypass jet .C29 (drill size) Main… | ||
| scan0393 | Updated settings for a Stromberg carburetter DB.42 for winter running. | ||
| View original record | To Hs/Rm. c. to Hs/CTS. X508 Hs/G.R. 10/JH.22.1.36. GUB.5. Unit B-3-M. The Stromberg carburetter DB.42. on this car was brought up to date in setting and controls etc. E.83210 spring fitted to… | ||
| scan0394 | Tests of an induction system non-return drainage valve for a 25/30 HP engine. | ||
| View original record | x508 To E. c. to Wor. c. to By. Hs/CTS.5/KW.23.1.36. 25/30 HP. Engine - Induction System. Further to our report Hs/CTS.1/KW.22.1.36. Tests have been carried out in conjunction with the induction pipe… | ||
| scan0395 | Initial engine starting tests and the effects of different air intake bends on distribution. | ||
| View original record | -2- (3) Initial Starting of Engine. With hand controlled choke closed and throttle half open - At 100 r.p.m. depression = 4.7" Hg. " 60 " " = 3.0" Hg. " 45 " " = 2.0" Hg. With hand controlled choke… | ||