Rolls-Royce Archives
| Identifier | Entry | ||
| 07-page001 | Breakages in the 20 HP exhaust system due to expansion and proposing a new sliding joint design. | ||
| View original record | V5230 Hs. C.W. Shelton. [text is struck through] 20 HP. EXHAUST SYSTEM. RE SPHERICAL JOINT WHERE THE EXHAUST PIPE CONNECTS ON TO THE FRONT END OF THE SILENCER. We have had a number of breakages at the… | ||
| 07-page002 | Standardisation report for a lock plate on the exhaust pipe nut to prevent it from working loose. | ||
| View original record | RR.TRD (Low) (H.L.DRG S-11-20) HP 281497 HS X5230 COMPLETED 16.10.25 STANDARDISATION of CHASSIS PARTS. Date 8.10.25. Description of Parts. LOCK PLATE FOR NUT ON EXHAUST PIPE. Origin. To prevent nut… | ||
| 07-page003 | Modifications to the 20 HP induction and exhaust pipes with a strengthened flange. | ||
| View original record | To EY. from E. c. to CJ. c. to RG. c. to Hs. X5230 E2/M2.3.26. 20 HP. INDUCTION & EXHAUST PIPES WITH STRENGTHENED FLANGE. X.5230 X.5070 We thank you for your scheme No.735 which shews the above… | ||
| 07-page004 | Approval to proceed with an aluminium induction pipe for the 30 HP engine. | ||
| View original record | To E. BY. HS. c. to CJ. BJ. FROM R. LE CANADEL. X5230 R6/M24.3.26. RE. 30 HP. EXHAUST AND INDUCTION PIPES. X.8230 X.5070 I think LeC.2216 quite good, go ahead with aluminium induction pipe. I think… | ||
| 07-page005 | Confirming Mr. Royce's instruction to proceed with work on 20 HP induction and exhaust pipes. | ||
| View original record | To BY. from E. c. to CJ. Hs. V5230 E1/M25.3.26. 20 HP. INDUCTION & EXHAUST PIPES. X.5070 X.5230 We send you herewith the originals of LeCs. 2206 and 2216. You will have gathered from E5/M24.3.26. that… | ||
| 07-page006 | Recurring breakages of the exhaust downtake bracket on the 20HP chassis and proposed solutions. | ||
| View original record | [Stamped Text] X5230 [Typed Text] To Hs. BY/SS3/DB.30.3.26. Re 20HP Chassis - Exhaust Fittings. Sec:5230 Exhaust Downtake Bracket. We give below copy of memo MX9/T.27.3.26 - "From time to time we are… | ||
| 07-page007 | Experiments with compression ratio and the exhaust system on a 20 HP engine. | ||
| View original record | To R. from He/ACL. c. to BJ. RG. c. to E. BY. c. to EX. Wor. c. to DA. X5230 He/ACL1/LG1.5.26. EXPERIMENTS WITH COMPRESSION RATIO AND EXHAUST SYSTEM ON 20 HP. ENGINE. X790 H1134 The following report… | ||
| 07-page008 | Engine performance tests, comparing different compression ratios and analysing power output, frictional losses and detonation. | ||
| View original record | contd :- -2- We have appended curves which shew both the power output with the high ratio and the present standard (sheet 1) and in addition a third curve is plotted giving the brake horse power… | ||
| 07-page009 | Tests of a piston with a deep concave head to reduce engine detonation. | ||
| View original record | contd :- -3- Another type of piston was tried of approximately the same ratio (5.35) in which an endeavour was made to obtain a more compact combustion space. The piston had a deep concave head and it… | ||
| 07-page010 | Tests conducted to determine and reduce power loss caused by various parts of the exhaust system. | ||
| View original record | contd :- -4- POWER LOSS DUE TO VARIOUS PARTS OF THE EXHAUST SYSTEM. A series of tests were undertaken to determine the power absorbed by the various components of the exhaust system and to see if… | ||
| 07-page011 | Report page detailing experiments on engine exhaust manifolds, silencers and back pressure. | ||
| View original record | contd :- -5- meet at a high velocity and so loose any advantage, in scavenging, they may possess due to their kinetic energy. In the experimental manifold it would seem that the k.e. assists in… | ||
| 07-page012 | Graph showing the power output of a 20-HP engine with different exhaust system configurations. | ||
| View original record | 20-H.P. ENGINE - POWER OUTPUT WITH VARIOUS PARTS OF THE EXHAUST SYSTEM STD ENGINE 4.75/1 COMPn RATIO BAR 758 M/M. TEMP. 19°C (AIR) B.H.P. R.P.M. SHORT OPEN EXH. PIPES MANIFOLD WITH OPEN EXHAUST PIPE… | ||
| 07-page013 | Graph showing the power output of a 20 HP engine with increased compression ratios. | ||
| View original record | 20 H.P. ENGINE - POWER OUTPUT WITH INCREASED COMPRESSION RATIO CORRECTED FOR BAR 760 m/m AIR 12° C B.H.P. R.P.M. 5.45 TO 1 COMP'S RATIO CALCULATED FOR 5.45/1 RATIO STD COMP'N RATIO 4.75 TO 1 CLH /… | ||
| 07-page014 | Blueprint of an experimental 20 horsepower exhaust manifold. | ||
| View original record | LEAD IN AT ABOUT 30° 1.500 DIA BRANCH PIPES INCR TO 1.500 DIA WHERE THEY MERGE INTO DOWN PIPE INTERNAL DIA 2.000 TO SILENCER EXPL. 20-HP EXHAUST MANIFOLD AHT 16/10/26 | ||
| 07-page015 | Preparation of a 20 HP car for a 10,000 miles test in France and a request for exhaust system modifications. | ||
| View original record | To E. from Hs. X5230 Hs3/LG16. 6. 26. 20 HP. CHASSIS FOR 10,000 MILES TEST. X55840A X5230 We are preparing a 20 HP. car for a 10,000 miles test in France. We are anxious that this car shall be fitted… | ||
| 07-page016 | Delay in starting the design for the revised 20HP exhaust system. | ||
| View original record | X.5230 To HS. FROM E. C. to BJ. BY. re 20HP. EXHAUST SYSTEM E1/M22.6.24. -Xv5160- X5230 In reply to your memo. He3/L016626., we have not yet started the revised 20HP. exhaust system, and I do not… | ||
| 07-page017 | Requesting an estimate on expected power increases from an engine after specific modifications. | ||
| View original record | To E. To Hs. from R. 4580 R9/M2.11.26. 20 HP. X.5770 XJ5771 X.5230 Several times we have started out to get more power from this engine by :- (1)..... Improved exhaust. (2)..... Slightly higher… | ||
| 07-page018 | The repeated breakage of the exhaust pipe and bracket on the 20 HP model. | ||
| View original record | To R; from Hs/GWH. c.c. to EJ. WDR. c.c. to E. DA. c.c. to HY. 15230 Hs/GWH/LG23.5.27. 20 HP. EXHAUST PIPE E.51376 & BRACKET E.53475. X5230 The flange of this pipe has broken on every 10,000 miles… | ||
| 07-page019 | Proposal to improve road clearance on Phantom and 20 HP models by modifying the exhaust pipe and rear petrol tank sump. | ||
| View original record | To Hs. from R. c. to BJ. BY. X5230 RA/M9.7.27. PHANTOM AND 20 HP: ROAD CLEARANCE. X.516 X.8230 X.5230 X.6670 X8160 It is proposed to lift up the exhaust pipe somewhat, by flattening it (making it oval… | ||
| 07-page020 | Modifications to increase the power output of the 20 HP engine K5771. | ||
| View original record | To R. from Hg/ACL. c. to BJ. Wor. c. to RG. E. c. to DA. SY. c. to CY. Y5230 Hs/ACL2/LG21. 9.27. INCREASED POWER OUTPUT OF 20 HP. K5771 We have previously reported the increased performance obtainable… | ||
| 07-page021 | Comparison between an experimental engine and the standard production 20 HP model, detailing increased power and effects on petrol consumption. | ||
| View original record | contd :- -2- Appended are curves shewing a comparison between this experimental engine and the std. production 20 HP. It is noticeable that the peak of the power curve has been raised to aprx approx.… | ||
| 07-page022 | Performance graph comparing the power output and fuel consumption of a standard 20 HP engine against an experimental engine. | ||
| View original record | IMPROVED POWER OUTPUT OF 20 H.P. R.R. ENG. No 11 G II COMPRESSION RATIO - 5.45 TO 1 LARGE VALVES (1.400 DIA) LONG DURATION CAMSHAFT STROMBERG VERTICAL CARBURETTER T SHAPED INDUCTION MANIFOLD SPECIAL… | ||
| 07-page023 | Blueprint of the exhaust and induction manifold arrangement and timing diagram for an experimental Goshawk engine. | ||
| View original record | ARRANGEMENT OF EXHAUST & INDUCTION MANIFOLD ON EXP. GOSHAWK ENGINE CARBURETTOR PLACED UNDER EXH PIPE FOR CONVENIENCE WHEN FITTED TO CAR. THIS ARRANGEMENT IS USED SO AS TO PREVENT THE BRANCH PIPES OF… | ||
| 07-page024 | Test report comparing three new exhaust manifolds against the standard for a 20 HP engine. | ||
| View original record | To R. From Hs/ACL. c. to BJ. Wer. c. to K. DA. c. to GY. HY. 45230 Hs/ACL1/L/17.1.28. 20 HP. R2. EXHAUST MANIFOLDS. X5230 We have carried out tests on the 20 HP. engine with the three new exhaust… | ||
| 07-page025 | Analysis of different exhaust manifold designs regarding power loss and gas flow dynamics. | ||
| View original record | contd :- -2- The reason the std. manifold gives such a considerable power loss - in this case 10 HP. at 3200 r.p.m. or 13½% - we consider is due to the opposing direction of the gas flow from each of… | ||
| 07-page026 | Recommendation to increase the internal pipe diameter on an experimental manifold. | ||
| View original record | contd :- -3- of Sch.935 which would give a unidirectional flow into the downpipe. We consider also that the inside diameter of the pipes could be increased with advantage - at present on this… | ||
| 07-page027 | Graph comparing the performance of various experimental exhaust manifolds on a 20 HP engine. | ||
| View original record | 20. HP EXPERIMENTAL EXHAUST MANIFOLDS. TESTS MADE ON 20 HP. ENGINE COMPn RATIO 5.45/1. STD. CYL. HEAD & VALVES LONG DURATION CAMSHAFT. ZENITH T.D. CARBURETTER(S). B.H.P. B.M.E.P. lbs/sq in R.P.M. OPEN… | ||
| 07-page028 | Design for the Super Sports 20 HP exhaust manifolds and pipe. | ||
| View original record | E. from R. Hs. BY. c. to BJ. Wor. RG c. to DA. X 5230 H3/M&21.1.28. SUPER SPORTS 20 HP. EXHAUST MANIFOLDS AND PIPE. X.8230 X.5230 X.7230 It is understood that on the improved 20 HP.(next 10,000 miles)… | ||
| 07-page029 | The performance testing of various exhaust manifolds for a 20 HP engine. | ||
| View original record | To R. From Hs/ACL. c. to BJ. WOR. STOCKFORDS. E. c. to GA. BY. V5230 Hs/ACL1/L024. 2. 28. 20 HP. EXHAUST MANIFOLDS. In our previous report on the power output with the various exhaust manifolds on the… | ||
| 07-page030 | Recommendation to produce a new low power loss manifold (Sch. 934) for the 20 HP chassis. | ||
| View original record | contd :- -2- than those with high losses. A low power loss manifold enables full advantage to be obtained from a 'cut out'. Considering that the new type manifold Sch. 934 is a distinct improvement… | ||
| 07-page031 | Performance graph comparing various experimental exhaust manifolds on a 20 HP engine. | ||
| View original record | 20 HP EXPERIMENTAL EXHAUST MANIFOLDS TESTS MADE ON 20 H.P. ENGINE COMP. RATIO 5.45/1. STD. CYL. HEAD & VALVES LONG DURATION CAMSHAFT ZENITH T.B. CARBURETTOR (1) B.H.P. R.P.M. B.M.E.P. lbs/sq in OPEN… | ||
| 07-page032 | Blueprint showing three different designs for 20 HP exhaust manifolds. | ||
| View original record | 20 H.P. EXHAUST MANIFOLDS. SCH 934. THIS MANIFOLD GIVES THE BEST POWER OUTPUT. SEE POWER CURVES SCH 936 SCH 935. THE APPENDED CURVES SHOW THE POWER OUTPUT WITH THE MANIFOLDS SHEWN ABOVE A.C.L.… | ||
| 07-page033 | Potential engine improvements, referencing a Phantom scheme on the 20 HP model. | ||
| View original record | E. from R. c. to BJ. Wor. BY. Hs. 45230 R3/M28.2.28 INDIA 3. X.5770 X.5070 X.5330 X.5080 X.5010 X.5000 In addition to the 6 items given in DA/EV/24.2.28., we ought to get some engine improvements: (7)… | ||
| 07-page034 | Proposed sheetmetal bracket to support an exhaust system silencer on an X-shaped cross member. | ||
| View original record | BY. from DA. c. to BJ. Hs. Y5230 DA1/M3.7.28. INDIA 3. EXHAUST SYSTEM. X.5230 X.5380 Herewith we send N.sch.2642 giving a sketch of the proposed sheetmetal bracket for supporting the silencer to the X… | ||
| 07-page035 | Design modifications for the India 3 cylinder block regarding the water pipe flange and exhaust jacket connection. | ||
| View original record | BY. from E. c. to BJ. Hs. X5230- E1/M13.7.28. INDIA 3. CYLINDER BLOCK. X.5050 X.5070 X.5230 We send herewith Lec. 2574 showing the two bolter flange for the water pipe connection to the cyl. block on… | ||
| 07-page036 | Induction pipe for the India 3 model, detailing adaptations for various carburettors. | ||
| View original record | BY. from E. C. to BJ. Hs. Y5230 E2/104.7.28. INDIA 3. INDUCTION PIPE. X.5070 X.5230 X.5080 We send you herewith drg. Lec.2571 shewing an induction pipe for India 3. of the underfed slot type. The drg.… | ||
| 07-page037 | Meeting request to discuss preventing firing in the silencer for a 20HP car, chassis GRJ-23. | ||
| View original record | To Mr. from Hm. By. Ho. Mr. X5230 Hm5/H19.7.25. Re 20HP. Chassis GRJ-23. Colvills. E.J. has instructed me to call a Technical Conference immediately, and to ask you to attend in order to discuss the… | ||
| 07-page038 | Drawings for exhaust pipes for India, specifically the design of branch pipes to avoid compound bends. | ||
| View original record | X.5230 BY. from E. c. to BJ. Hs. E2/M28.7.28. INDIA - EXHAUST PIPES. We send you herewith drg.LeC.3582, dealing with the above. The branch pipes have been made to the shape shewn with a view to… | ||
| 07-page039 | The testing of cross web pistons and the gas-tightness of pinned rings. | ||
| View original record | Hs. from H. c. to BJ. Wor. BY. Y5230 R4/M9.9.28. 20 HP. ETC. PISTONS. G.4. X.5040 X.5230 X.741 X.5050 Although we have no further interest in the cross web pistons tried on the above car, one should… | ||
| 07-page040 | Extract from a personal report regarding a cracked exhaust manifold and the failure of aluminium treatment on car 14-G-4. | ||
| View original record | Y5230 To E. To D.A. } FROM HS/RM. Ha/Rm2/LG10.1.29 X5840c We give below an extract from a personal report received from Hancock in connection with the exhaust manifold on 14-G-4 car :- "The exhaust… | ||
| 07-page041 | Design of 'SS' and 20 HP car exhausts to improve sound quieting. | ||
| View original record | Hs. E DA. BY. from R. c. to BJ. Wor. SG. & to FN. CMB. 15230 'SS' AND 20 HP. CAR EXHAUSTS. X.7230 X.5230 Following up the idea already given, it would seem that for an easily quietened exhaust we… | ||
| 07-page042 | Technical memo about exhaust blows on the 20 HP Chassis caused by back pressure. | ||
| View original record | Handwritten Top: A.H. Would you please let me have your remarks. Nor. 25/1/29. X5230. Typed: M-N (Strikethrough) Nor. Br2/A. 24.1.29 Technical - Exhaust blows on 20 H.P. Chassis… | ||
| 07-page043 | Standardisation of using Staybright steel for the exhaust snout to prevent rusting. | ||
| View original record | RR. 752 REVISED (1000) (S.C. 777-29-2-28) W.C & S. LTD. 45230 COMPLETED 14.3.29 STANDARDISATION of CHASSIS PARTS. Date 12. 2. 29 Description of Parts. STAYBRIGHT STEEL FOR EXHAUST SNOUT. X No. 7230… | ||
| 07-page044 | Details for fitting a new part to the 40/50 HP and 20 HP chassis, including test dates and costs. | ||
| View original record | 40/50 HP. chassis. The number of the chassis on which the new part will be fitted. J.2. series. Date when chassis will be handed to test. 11.6.29 Cost of scrapper material, if any. Nil. Cost of jigs… | ||
| 07-page045 | Exhaust boom issue on a 20 HP car and proposing a new exhaust system. | ||
| View original record | X5230 To DA. From Hs/Rn. Hs/Rn5/LG27.3.29. X5380 We now have a 20 HP. with tubular cross members and 5/1 compression ratio turbulent head. The main difficulty with this car is the exhaust boom which… | ||
| 07-page046 | 20 HP manifold and silencer system, questioning the source of increased noise. | ||
| View original record | X.5230 Rm. from DA. DA1/MS. 4. 29. With reference to Hs/RaS/LG27.3.29., the standard 20 HP. manifold is cast. Further the pipe at the moment goes into the centre of the silencer. Do you mean that you… | ||
| 07-page047 | Problem with the 20 HP exhaust system and the proposed solution of a front expansion box. | ||
| View original record | To DA. from Hs/Rs. X5230 Hs/Rs2/DG9.4.29. 20 HP. EXHAUST SYSTEM. X5230 with reference to DAL/M6.4.29. The trouble with the 20 HP. exhaust system is exactly the same as that on the S.S., due apparently… | ||
| 07-page048 | The stages of improvements for the 20HP model, using codenames like 'India', 'China', and 'Japan' to track changes to the chassis, bore, and engine mounting. | ||
| View original record | HS.) From R. BY.) Copy to SG. Wor. C. PN. SECRET. X5230 HS/149.5.29. 20HP. X5050 X5005 X5380 X5770 Regarding the various stages of the 20HP, we have called in the past on.s of the improvements… | ||
| 07-page049 | Modifications to an exhaust system and analysing frame stiffness in relation to radiator movement and engine weight. | ||
| View original record | (2) ! At the same time as you are doing this work I shall be glad if you will alter the exhaust system by breaking up the length of the pipe as we have done in the case of SS., and we shall send you… | ||
| 07-page050 | Advantages and disadvantages of thermostatically controlled radiator shutters as an alternative to hand control. | ||
| View original record | X 4230 SG. Hs. } FROM R. SECRET. RL/M27.5.29. C. to Mr. Fuller. CY. Wor. Ev. C. OX. 'SS' AND 'JAPAN' RADIATOR SHUTTERS. X 5210 X 7220 X 3497 We intend shortly to have these again fitted with… | ||
| 07-page051 | Review and critique of a 20 HP Cabriolet De Ville with a Blue Hooper Body, comparing it unfavourably to American cars. | ||
| View original record | Y5230 HS. from R. SECRET R4/M29.5.29. Copy to SG. " " BY. " " DA. 20 HP: CARRIOLET DE VILLE - X.5770 BLUE HOOPER BODY. X.5830 X.5230 This car, which arrived at WW. on Monday evening appears to us very… | ||
| 07-page052 | Recommendation to increase clearance in the stud holes for the 20 HP exhaust manifold following breakage due to restricted movement. | ||
| View original record | Hs. from E. C. to Sg. By. X5220. E2/17.6.29. Re 20 HP. EXHAUST MANIFOLD. We conclude from GWH/13.6.29 that the exhaust pipe broke from restricted movement rather than the load due to sliding, and… | ||
| 07-page053 | Mr. Royce's decision to use new Crown Steel for exhaust valves and a high-conductivity alloy for valve guides. | ||
| View original record | GUR. HS. RE. 15230 BY3/HP.30.7.30. X.4621 XG230 X.4011 XI230 X.4483 X8230 X9230 Exhaust Valves Chassis and Aero Engine. Mr Royce this afternoon on the telephone informed me that he wanted to bring in… | ||
| 07-page054 | New exhaust fittings for the 20HP chassis, detailing a revised nozzle to eliminate whistling. | ||
| View original record | C. to Hs/Rm. X5230 BY/CB7/IG.26.9.29. Re 20HP Chassis - Exhaust Fittings - Sec:5230. Please receive herewith blueprint of - E.55531 Nozzle (Rear Exhaust Pipe) which replaces E.54875. Will you please… | ||
| 07-page055 | Outlining an experimental plan for engine 'hot spots' and a development program for a 20 HP engine. | ||
| View original record | XE230 To CHP. From s/ACL. c. LNS. c. GP. Hs/ACL2/AD16.10.29. X.7080 X.7230 X.5080 X.5230 S.S. HOT SPOT EXPERIMENTS (1) Make up two sets of Thermo couples which can be used on car or test bed. (2) Run… | ||
| 07-page056 | List of action points for engine component testing and modifications, specifically for inlet manifolds and cylinder blocks. | ||
| View original record | -2- (8) Put in hand a larger bore inlet manifold. All up to item (6) can be tested first (open exhaust) (7) & (8) can be tried later. (9) Look into the limits of dimensions of cylinder block, con.… | ||
| 07-page057 | Checked print for an exhaust pipe for a 30HP chassis. | ||
| View original record | X5230 To. Supt. c.c. Mr. Walker (Pattern Shop) c.c. HA/ACL. Re 30HP Chassis - Exhaust Fittings - Sec: 5230. With reference to our memo. BY/CS2/IG.25.10.29, we attach to each copy of this memo… | ||
| 07-page058 | Sending an inlet and exhaust manifold and a cylinder head for the improved 'China' project. | ||
| View original record | COPY. X5-30 BY. From E. E.1/49.11.29. c. to Sg: c. to Hs. "CHINA". X. 5770 X. 5230 We send herewith Lec.2758 - Inlet and exhaust manifold, and Lec.2759. - Cylinder head, for improved 'China'. E. | ||
| 07-page059 | Progress on engine and axle development projects codenamed 'China' and 'Japan'. | ||
| View original record | HS. From R. COPY. K5258 R.1/11.11.29. c. to Sx. c. to Wor. c. to Sy. "CHINA" AND "JAPAN". X.5770 X.5230 X.2056 X.5350 We are very delighted with the progress we are now making with "China" and… | ||
| 07-page060 | Alternative schemes for the front expansion box of the China exhaust system. | ||
| View original record | BY. FROM DB. Copy to SG. HS. X5230 DM/CMS.15.11.29. CHINA EXHAUST SYSTEM. Herewith we send M. schemes 2963/4. - alternative schemes for the front expansion box of the China exhaust system. The one… | ||
| 07-page061 | Dispatch of drawing LeC. 2762 for an exhaust pipe related to modifications for China. | ||
| View original record | BY. FROM E. 15330. E1/M18.11.29. Copy to SG. Copy to HS. re. IMMEDIATE MODIFICATIONS TO CHINA. We send you herewith drawing LeC. 2762., shewing exhaust pipe required for the above. This pipe will also… | ||
| 07-page062 | Standardisation of chassis parts, specifically Firth's Crown Steel car engine exhaust valves. | ||
| View original record | No. TEN REVISED (Date of last Alt.) Alt. No. & Date. X5230. COMPLETED 27.11.29. STANDARDISATION of CHASSIS PARTS. Date 23. 8. 29 No. E.T.T.A Handwritten: X5230 K7230 Description of Parts: Firth's… | ||
| 07-page063 | Design committee report discussing 'F' type crankshafts, the Schneider Trophy, exhausts, and battery charging. | ||
| View original record | R. (Held up). Bg. Wor. BY. E. Hs. Rgl/Lw.13.3.30. X.3865 X.4649 X.5230 THIRTEENTH REPORT OF DESIGN COMMITTEE. Long Bearing Crankshaft "F" Type. The experience with the above shaft was discussed and it… | ||
| 07-page064 | Two failures, a hypoid axle and the exhaust system, during a 10,000-mile test in France. | ||
| View original record | To Ss. From Hs. c. W Nor. c. to Hy. Da. Y 530 He/WJ.1/14.3.30. Y 58400 Y-2066 25 HP. 10,000 MILES TEST IN FRANCE. We have had two failures on this car which we consider makes it necessary for us to… | ||
| 07-page065 | Component failures, agreed modifications, and arrangements for extended testing in France. | ||
| View original record | -2- M.A./L.14.3.29.Contd. These failures have been discussed with E., and the Design Committee and modifications have been agreed to. It is thought that these modifications will definitely overcome… | ||
| 07-page066 | Recommendation to delete drain holes in silencers as they are a source of exhaust noise. | ||
| View original record | To BY. From Hs/Rn. c. to Ds. Y5230 Ha/Rn.1/WJ.19.3.30. DRAIN HOLES IN SILENCERS. Y7230. x5230 On a number of occasions recently, exhaust noises on the pick-up have been traced to these drain holes. On… | ||
| 07-page067 | The failure of an exhaust valve on a 20 HP car and a request for steel analysis. | ||
| View original record | Hl. From Hs/Bn. Y5230 Hs/Rm.3/MJ.22.3.30. 4840 We are somewhat alarmed by the failure of one of the exhaust valves on the 20 HP. car now running in France. These are supposed to be in Firth's Crown… | ||
| 07-page068 | Covering letter for a correspondence from Halford, designer of a 16-cylinder air-cooled engine, concerning a silencer. | ||
| View original record | YS230 . Lp10/Av/JL.26.3.30. Ha. Copy to W.O.R. We attach hereto a letter from Halford, who you will recall is the designer of the Halford 16 cylinder air-cooled engine. We shall be glad if you will… | ||
| 07-page069 | Request to manufacture a replacement sliding joint for a 20 HP silencer in two different bronze alloys due to a failure. | ||
| View original record | RIC. From Hs/Rm. K5230 Ha/Rm.5/MJ.26.3.30. YC-80. Will you please make Detail E.55914 Sliding Joint for 20 HP. Silencer - One off in aluminium bronze, and one off in manganese bronze. These are… | ||
| 07-page070 | Vortex Silencers, sending a drawing of a 20 HP rear expansion chamber for testing. | ||
| View original record | To Ld. From Ha/Rn. c. to Wor. Y 5230 Ha/Rn.7/MJ.27.3.30. VORTEX SILENCERS. We send you herewith a drawing of the rear expansion chamber, 20 HP. E.55603. We are willing to test out one of these… | ||
| 07-page071 | Troubles with the 20/25 HP chassis exhaust system and potential solutions. | ||
| View original record | X5220 To Rg. from Da. c. E. Ry. Hs. Da4/N27.3.30. RE - 20/25 HP. CHASSIS - EXHAUST SYSTEM. ---- The system on the 10,000 miles car is, we understand, a compound of the old 20 HP. and that got out for… | ||
| 07-page072 | Confirming a blueprint for a Vortex Silencer has been sent to Major Halford to manufacture a test unit. | ||
| View original record | X 3230 Lp12/AV/JL.29.3.30. Ha/Rm. Copy to Wor. Re: VORTEX SILENCERS. ---------------------- As requested in Hs/Rm7/MJ.27.3.30. we have sent the Blue Print E.55603 to Major Halford and asked him to… | ||
| 07-page073 | Nineteenth design committee report on a 10,000-mile test, discussing modifications and issues with exhaust pipes, valves, and rear axle. | ||
| View original record | R. (Held up). Dr. BY. R. Hs. X5230 Rg.2/LW.1.4.38. X.2924 X.5640 X.5230 X.5350 X.2066 NINETEENTH REPORT OF DESIGN COMMITTEE. 10,000 Mile Test on 14-04. The position with regard to the exhaust pipes is… | ||
| 07-page074 | Urgent request to prepare a complete set of 20 HP exhaust system pieces for production. | ||
| View original record | RHC. From Ha/Ra. Y5230 Re/Ra.7/MJ.4.4.30. 20 HP. EXHAUST SYSTEM. Will you please prepare a complete set of 20 HP. exhaust system pieces to Scheme 1249, N.Scheme 2980 (Flange to suit Std. Silencer) and… | ||
| 07-page075 | Change of material to S.L.V. steel for exhaust valves on 20 HP and 40/50 HP chassis. | ||
| View original record | COPY. YS230. E. Dept. c. Hs. c. Roy. X. 7230 X. 5230 X. 4554 BY.16/G.4.4.30. 20 HP. and 40/50 HP. CHASSIS - EXHAUST VALVES. In view of Mr. Hancock's reports, whilst there is no need to create a panic… | ||
| 07-page076 | Components and recommended modifications for the 20 HP exhaust system. | ||
| View original record | To E. from He/Rn. c. to EV. c. to W. c. to MOT. X 5230. HS/Rn.S/W.3.4.30. 20 HP. EXHAUST SYSTEM. The 20 HP. exhaust sytem that has stood up in France consists of:- Sch.1249. N.Sch.2965 (Flange to suit… | ||
| 07-page077 | Request for a Bijur pump, a front expansion box, and friction shock absorbers required for testing. | ||
| View original record | COPY. BY. From Hs/Rs. X5230. Re/R.I/W. 7.4.30. X.3808 X.5230 X.752 X.751B Will you please note that the following pieces are required for test as soon as possible. (1) Bijur Pump enlarged for axles.… | ||
| 07-page078 | Directive to revert to S.L.V. specification No. 238.A for exhaust valves on 20/25 HP and 40/50 HP chassis. | ||
| View original record | COPY. X5230 E. Dept. Roy. SFC. Hs. Roy/Ms. Byl6/N.7.4.30. X.7230 X.5230 X.4554 Re. EXHAUST VALVES. It is most important that we should revert to S.L.V. specification No. 238.A. in place of H.R. Crown… | ||
| 07-page079 | Outlining the reversion to S.L.V. steel for exhaust valves, the associated scrap costs, and implementation timeline. | ||
| View original record | COPY. X5230 BY. From Sft. c. Wor. c. Hs. c. ROY. SFT.4/B.8.4.30. X.4429. X.7230. X.5230. EXHAUST VALVES. With reference to memo BY16/N7.4.30. instructing us that we should revert to S.L.V. steel in… | ||
| 07-page080 | Suggestion to modify the longitudinal stay for the 20/25 HP chassis exhaust silencer. | ||
| View original record | X5238 Ry. from Da. c. Hs. E. Dal/N12.4.30. Re : 20/25 HP CHASSIS - EXHAUST SILENCER LONGITUDINAL STAY. We suggest that this stay, which has been tried in the form shown on Scheme 1249, and found to be… | ||
| 07-page081 | Request to prepare parts to modify the 20 HP car exhaust and clutch systems. | ||
| View original record | RHC. From Hs/Rn. X5230. Hs/Rn. 4/MJ. 24.4.30. Will you please prepare bits to enable us to bring our 20 HP. car exhaust systems up to date with regard to the modifications instructed as a result of… | ||
| 07-page082 | Cover memo from 'Wor' to 'Hs/Rm' forwarding an attached memo from 'Sg' for investigation. | ||
| View original record | COPY. To Hs/Rm. From Wor. Wor.7/T.6.5.30. X.5770 X.5520 X.5230 X.4330 I attach copy of memo received today from Sg. Will you kindly have the matters referred to investigated and let me know what you… | ||
| 07-page083 | Poor rear seat comfort and exhaust spitting on a 20/25 HP model. | ||
| View original record | To Nor. From Sg. C. to PH. Re. 20/25 HP. You will probably have heard from Oy. in regard to Mr. Fuller's trip on the above car. I understand that he was very pleased with the general performance but… | ||
| 07-page084 | Criticisms of the 20 HP car's ride and exhaust spitting, with proposed solutions and comparisons to other models. | ||
| View original record | WOR. From Ha/Rn. X5230 Ha/Rn.9/W.7.5.30. With reference to Wor.7/TS.5.30. We have received several criticisms of the 20 HP. riding recently both about the riding of the last 10,000 miles 20 HP. car… | ||
| 07-page085 | Engine performance issues like 'spitting in the silencer', comparing with American and Experimental cars. | ||
| View original record | -2- thermostatically operated shutters should be an advantage. Again, the fitting of the throttle is most important, but we are sure that this is not a fault at present. We do not think that the… | ||
| 07-page086 | Issues and required improvements for body mounting and coachbuilding. | ||
| View original record | COPY. (Rec'd at Works 20.5.30) Da. c.c. B. (Held up). c.c. H. c.c. NP. c.c. J. c.c. lbs. c.c. Sy. c.c. JL. re. BODY MOUNTING ETC. KP7/H21.5.30. X.780S. X.500S. X.7930. X.S630. X.7380. X.S380. X.7230.… | ||
| 07-page087 | Report discussing chassis and body-related noise, vibration, and booming issues. | ||
| View original record | -2- extending the outlet spout. The "dead" fabric type body is dying out in favour of the coachbuilt type. We find the characteristics of the chassis for torque reaction effect and fuss etc. at high… | ||
| 07-page088 | Standardisation report for exhaust valves E.53158, replacing a failed part following tests. | ||
| View original record | STANDARDISATION of CHASSIS PARTS. Description of Parts. EXHAUST VALVES E.53158. S/SLV. Origin. To replace Firth's H.R.Steel E.55393 which failed during tests in France. Experimental Test Report. Run… | ||
| 07-page089 | Carburettor and camshaft comparison tests performed on the 'Japan' engine. | ||
| View original record | X5230 To A. From He/ACL. To B. Mr. W. To C. Mr. E. To D. Mr. Ev. He/AR.1/M.21.8.30. X8020 X1053 X5090 X5070 X5230 THIS INVESTIGATION TESTS & CAMSHAFT COMPARISONS ON "JAPAN" ENGINE. We have carried out… | ||
| 07-page090 | Engine tests comparing riser pipes, bore diameters, and choke sizes to improve performance. | ||
| View original record | -2- tests it was an advantage to keep the riser pipes as short as possible both with regard to power output and quick engine response to throttle opening. The hot spot was formed by a patch round the… | ||
| 07-page091 | Report comparing engine performance with different camshaft configurations. | ||
| View original record | -3- HS/AZ.1/AL.23.5.31.Contd. loading up when running for lengthy periods at low R.P.M. full throttle. We found we could open up the brake to maximum R.P.M. and the engine would speed up without the… | ||
| 07-page092 | Summary of experiment results on the 'Japan' engine, focusing on twin carburetters and a long duration camshaft. | ||
| View original record | -4- The Very appreciable gain possible with twin carburetters and 112° long duration camshaft. The results of our experiments on 'Japan' can be summarised as follows :- (1) Twin carburetters give a… | ||
| 07-page093 | Table of actual valve timing data taken on an engine with .020 tappet clearance, showing results from twin carburetor tests. | ||
| View original record | ACTUAL VALVE TIMING TAKEN ON ENGINE WITH .020 TAPPET CLCE. CAMSHAFT | 116° | 112° | 110° IN. OPENS | 13° A.T.C. | 7° A.T.C. | 16° A.T.C. IN. CLOSES | 49° A.B.C. | 43° A.B.C. | 37° A.B.C. EX. OPENS |… | ||
| 07-page094 | Performance comparison graph of large and small bore induction manifolds using twin Zenith carburettors on a 'Japan' engine. | ||
| View original record | TWIN ZENITH CARBS. ON "JAPAN." V 867. COMPARISON OF LARGE & SMALL BORE INDUCTION MANIFOLD. 26 M/M CHOKES IN CARB. 5.25/1 COMPn RATIO. 116° CAMSHAFT. OPEN EXHAUST. SMALL BORE PIPE LARGE BORE PIPE… | ||
| 07-page095 | Performance graph comparing different camshafts on an engine codenamed 'Japan'. | ||
| View original record | CAMSHAFT COMPARISONS ON 'JAPAN' TWIN ZENITH CARBS. 26TH CHOKES. SMALL INDN PIPE (1.25 INT. DIA) 5.25/1 COMP. RATIO OPEN EXHAUST. V868. B.H.P. (Corrected to 760 m/m & 15.5 C) R.P.M B.M.E.P. (lb/sq in)… | ||
| 07-page096 | Performance graph comparing twin Zenith carburetters against standard chassis carburetters on the 'Japan' engine model. | ||
| View original record | TWIN ZENITH CARBURETTES On 'JAPAN' COMPARISON WITH STD CHASSIS CARBURETTER. ZENITH USED WITH 26 m/m CHOKES - SMALL BORE IND. PIPE - 112° & 116° CAMSHAFTS: 5.25/1 COMP. RATIO. OPEN EXHAUST. V869 B.H.P.… | ||
| 07-page097 | Blueprint detailing the arrangement of a twin Zenith carburettor and induction pipe on a Japan engine. | ||
| View original record | V870. INLET TO TOP SPOT 1.250" INSIDE DIA 1.400 DIA THROTTLE BORES OUTLET FROM HOT SPOT 3.125 PIPES TAPER FROM 1.250 DIA TO 1.400 DIA TO MATCH CARB THROTTLES ARRANGEMENT OF TWIN ZENITH CARB ON JAPAN… | ||
| 07-page098 | Standardisation of chassis parts, specifically the exhaust system E.55578. | ||
| View original record | RR. 783 REVISED (10M) (ST 837 A.L.O) BK. 2/28 X5230 COMPLETED 27.6.30. STANDARDISATION of CHASSIS PARTS. Date 23.4.30 No. 5230 Description of Parts. EXHAUST SYSTEM. E.55578. Origin. To overcome… | ||
| 07-page099 | Material and design of exhaust valves for car and aero engines. | ||
| View original record | Hs. } FROM R. & E. Rv. } C. Sg. Wor. X5230 R1/M13.8.30. X.4011 X.4488 X.7230 X.5230 EXHAUST VALVES - CAR & AERO ENGINES. The new Austenitic steel I understand proved to scale (oxidise), whereas… | ||
| 07-page100 | Requesting to be kept informed of the results regarding exhaust valves for car and aero engines. | ||
| View original record | COPY. Y5230. To Hs. From Sg. Sg19/E2.9.30. Re. Exhaust Valves - Car and Aero Engines. X.4011. X.4488. X.7230. X.5230. Referring to RL/M13.8.30 I should be glad if you would keep me in touch with… | ||
| 07-page101 | Stating a reluctance to alter exhaust valves following previous issues with Austenitic Steel. | ||
| View original record | To Sg. From Hs. No. 4/J.S.9.30. YS2 30 X.4011. X.4488. X.7230. X.5230. EXHAUST VALVES. Replying to Sg19/E2.9.30. We do not propose to be pushed into any alteration of exhaust valves. R. pressed us to… | ||
| 07-page102 | Outlining three design schemes for the revision of the 25HP 'Japan' engine. | ||
| View original record | BY. FROM E. A9230 E1/M3.11.30. C. to BG. WOR. C. to HS. HY. REVISION OF 25HP. ENGINE 'JAPAN'. X.5770. X.5050. X.5330. We send you herewith three schemes as follows dealing with the above:- Lec. 2833.… | ||
| 07-page103 | Causes and potential cures for 'spitting in the silencer'. | ||
| View original record | X5230. To R. From Hs/AJL. c. to JS. c. to WDT. c. to A. c. to RV. Ref: Hs/AJL.1/WJ.20.11.30. X5230 X5230 SPITTING IN THE SILENCER. We are continually working to find the cause and cure for spitting in… | ||
| 07-page104 | The effects of fitting a smaller low-speed choke tube to a carburetter to correct spitting. | ||
| View original record | -2- by using a low speed choke tube .100" smaller on all its internal dimensions. This was fitted on a car which was bad for spitting in the silencer even after all the known palliatives had been… | ||
| 07-page105 | Tests carried out to investigate and resolve engine spitting issues on car 22-EX. | ||
| View original record | -3- He/AD.1/SL.20.11.30.Contd. are obtaining some more so that we can get further experience. So far on 22-EX. we can find no disadvantage. Bench tests are being carried out in parallel to confirm the… | ||
| 07-page106 | Failure of a 25HP exhaust manifold after 3000 miles and proposing potential solutions. | ||
| View original record | BY. FROM E. Xv330 P4/MO.1.31. C. to SG. WCR. C. to HS. GWH. 25HP. EXHAUST MANIFOLD. We have a sample of the above handed to us by GWH., which has broken at the usual place after 3000 miles in France.… | ||
| 07-page107 | Causes of exhaust manifold failures and proposed solutions. | ||
| View original record | X8230. SG. FROM E. C. to R. WOR. C. C. to BY. HS. PN. 31/M.26.2.31. /1330 /7240 EXHAUST MANIFOLDS. We agree that the question of exhaust manifolds requires serious attention. At the same time it… | ||
| 07-page108 | Manifold design issues and potential improvements for the P. 2 model. | ||
| View original record | (2) As regards P. 2. we were not aware that this was giving trouble but in view of your memo, we are including this in the programme of improvement. The first P. 2's were fitted with manifolds made of… | ||
| 07-page109 | Development of exhaust manifolds with cooling ribs for various car models. | ||
| View original record | X15230 HS To S. Troup Sg. - re Exhaust Manifolds. Copy to H. Hon. C. HY. FE. Sg18/24.3.31 X15230 KES Co. Thanks for H1/MAC.7.W.1. I am glad to see what is being done in regard to exhaust manifolds for… | ||
| 07-page110 | Prints of exhaust manifold modifications for 20 & 25HP chassis. | ||
| View original record | R. FROM E. X5230 E2/2.4.31. C. to SG. WOR. C. to HS. BY. EXHAUST MANIFOLDS 20 & 25HP. CHASSIS Please find herewith prints of Lec. 2896/7.. dealing with the above in which sliding glands have been… | ||
| 07-page111 | Design improvements for a 25HP exhaust pipe nozzle. | ||
| View original record | X5230 E. HS. } FROM R. BY. } (At Le Canadel.) R3/M9.4.31. Copy to SG. WOR. 25HP. EXHAUST PIPE. Here again it seems that the nozzle should look stream ways and might be tried in its simplest form as… | ||
| 07-page112 | Request to instruct a new exhaust manifold for Japan engines on the lines of the Phantom II. | ||
| View original record | X5230 To By. From Hs/Rm. Hs/Rm.3/KT.21.4.31. EXHAUST MANIFOLD FOR JAPAN At the present moment we have no exhaust manifold for our Japan engines that has the least possibility of standing up. We have… | ||
| 07-page113 | Delay in designing improved exhaust manifolds for P. 1. & G. 1. models due to illness. | ||
| View original record | BY. FROM E. C. to SG. WCR. HS. X5530 E1/M23.4.31. IMPROVED EXHAUST MANIFOLDS FOR P. 1. & G. 1. X.5230. X.7230. The above unfortunately have been delayed by the illness of the man engaged on the design… | ||
| 07-page114 | Power loss in the 25 HP exhaust system and proposing modifications to improve performance. | ||
| View original record | X5230 To By. From Hs/Rm. Hs/Rm. 9/KT. 6. 5. 31. X.5230. X.5771. 25 HP. EXHAUST SYSTEM. Now we are getting more power out of the 25 HP we find that we are losing far too much power in the silencer… | ||
| 07-page115 | Comparison of specifications for the 40/50 and 20/25 models, including capacity, downtake, and swanneck dimensions, along with their ratios. | ||
| View original record | FOR FILES. YS-30 6.5.31. X.7230. X.5230. Capacity. Downtake. Swanneck. 40/50. 7668 cc's. 3.0" Dia. 2.0" Dia. 7.06 sq.in. 3.14 sq.in. 20/25. 3670 cc's. 2.0" 1.5" 3.14. 1.76. Ratio .48 .442 .56 By/SS. | ||
| 07-page116 | The development and testing of an exhaust system for the 'Japan' engine to reduce power loss. | ||
| View original record | To R. From Hs/An. c. to EG. SOT. c. to Ds. E. c. to SY. X5230 Hs/Rs.2/KT.9.5.31. JAPAN EXHAUST SYSTEM. We have been endeavouring to get a Japan engine ready for the road with an exhaust system that… | ||
| 07-page117 | Comparison table of pipe and fish tail area inside diameters for 40/50 HP and 20 HP models. | ||
| View original record | - 2 - Hs/Rm.2/RT.9.3.31.contd. | | 40/50.HP. | 20 HP. | |---|---|---| | Down Pipe | 2.750. | 1.625. | | Fish Tail Pipe | 1.812. | 1.375 | | Fish Tail Area | 2.25 sq". | 1.3 sq". | All figures inside… | ||
| 07-page118 | Graph of power curves for a 25 HP Japan Unit with a standard carburetter and 112° camshaft. | ||
| View original record | [ "GRAPH 1", "POWER CURVES", "25 H.P. JAPAN UNIT", "STANDARD CARBURRETTER", "112° CAMSHAFT", "B.H.P.", "R.P.M.", "B.M.E.P.", "COMPLETE STANDARD SILENCING SYSTEM", "OPEN EXHAUST" ], | ||
| 07-page119 | Blueprint graph of power curves for a 25 HP Japan Unit, testing various silencing system configurations. | ||
| View original record | GRAPH II POWER CURVES 25 H.P. JAPAN UNIT 112° CAMSHAFT TWIN ZENITH CARB 26 M/M CHOKES TURBULENT ALUM. HEAD 5.25 COMP RATIO SMALL BORE INDUCTION PIPE INSIDE DIA 1.250 B.H.P. M.E.P. EX. MANIFOLD E.56031… | ||
| 07-page120 | Graph plotting Brake Horsepower (BHP) and Brake Mean Effective Pressure (BMEP) against RPM for Engine No IV G.8 with various exhaust system configurations. | ||
| View original record | GRAPH II ENGINE No IV G.8. 11° CAMSHAFT 5.25/1 COMPRESSION RATIO TWIN-CHOKE ZENITH CARBURETTER LEGEND: OPEN EXHAUST JAPAN EXH MANIFOLD E.56031 & PH II EXHAUST SYSTEM E.82070 STANDARD CHINA EXH SYSTEM… | ||
| 07-page121 | Modifications for an exhaust system for a 25 HP model, utilizing a 40/50 HP type silencer. | ||
| View original record | To By. From Hs/Rm. X5230. Hs/Rm.8/KT.11.5.31. EXHAUST SYSTEM FOR 25 HP. X.5230. Confirming our conversation of Saturday, we should like you to instruct a 40/50 HP. type silencer for the 25 HP. taking… | ||
| 07-page122 | 'Japan 1' exhaust system and carburettor requirements, comparing it to the Silver Ghost. | ||
| View original record | YE230 HS. FROM R. R2/10.3.31. C. to - SO. MOR. BY. JAPAN 1. - EXHAUST SYSTEM. The Silver Ghost had the best system, and we have never found anything better. The two sets of 3 cylinders were kept… | ||
| 07-page123 | Performance of the Phantom II exhaust system and comparing it to a new manifold design for the Japan 1 model. | ||
| View original record | Y 5230 To R. From Hs. c. to Sg. c. to Or. c. to By. Hs.1/WJ.19.5.31. JAPAN 1. EXHAUST SYSTEM. Referring to R2/M13.5.31. Phantom 11 exhaust system has given us very little trouble. There are 800 cars… | ||
| 07-page124 | Performance graph and diagrams comparing two different exhaust manifold designs. | ||
| View original record | COMPARISON OF EXHAUST MANIFOLDS ENGINE 1V G8 JAPAN HEAD 3.25 BORE 1 1/2" CAMSHAFT 5.25 C.R. TWIN ZENITHS 26 M.M. DIA. CHOKES 1.250 IND. PIPE P.II TYPE MANIFOLD THREE DOWNTAKE SCHEME B M E P R P M 3"… | ||
| 07-page125 | Customer demand for extended exhaust tail pipes and considering two schemes for standardization on the F.2 & 25 HP models. | ||
| View original record | To R. From Hs/GWH. c. to Sg. Mor. c. to E. Ha. c. to Hy. 85230 F.2 & 25 HP. EXHAUST TAIL PIPES. X.7230. X.5230. There is a general demand by customers to have the exhaust fish-tail carried back as far… | ||
| 07-page126 | The increased cost of a hinged support for Phantom II and 25 HP exhaust tail pipes. | ||
| View original record | X5230 BY. FROM DA. DA1/M5. 6. 31. C. to SG. R. WOR. C. to E. HS/GWH. PHANTOM 2. AND 25 HP. EXHAUST TAIL PIPES. X.7230 X.5230 With reference to HA/GWH1/AJ2631., we presume the increased cost of the… | ||
| 07-page127 | The design and proposed testing for the J.1 exhaust silencing system. | ||
| View original record | BY. FROM DA. X5230 DAT/MS.6.31. C. to SG. WOR. HS. J. 1. EXHAUST SYSTEM. X. 5230. We send herewith N. Schs. 3285/6/7. shewing the exhaust silencing system for J. 1. The design is based on that for P.… | ||
| 07-page128 | Back pressure tests on the existing 25 HP J.I. exhaust system. | ||
| View original record | Y5230. To Da. From Hg/Rn. c. to SG. Gor. c. to HY. Ha/Rn.9/KT.9.6.31. J.I. EXHAUST SYSTEM. We send you herewith some back pressure tests which have been made on the existing 25 HP. exhaust system.… | ||
| 07-page129 | Graph of exhaust back pressure curves versus RPM for Engine Unit N.R.G8 with various silencer configurations, noted for 'Japan'. | ||
| View original record | V1160 EXHAUST BACK PRESSURE CURVES (JAPAN) ENGINE UNIT N_R G8. (5.25:1 COMPRESSION RATIO) 112° LONG DURATION CAMSHAFT TWIN-CHOKE ZENITH CARB. SMALL BORE INS. PIPE ALL CURVES TAKEN WITH THREE DOWNTAKE… | ||
| 07-page130 | Improved silencer for car model 19-G4. | ||
| View original record | To RHC. From Ha/Rm. Ha/Rm.6/MJ.30.6.31. SILENCER FOR 19-G4. The present 25 HP. silencer loses a lot of power. W.H. have given us an improved silencer M.Sch.3287. The main dimensions have been inserted… | ||
| 07-page131 | Fitting and testing of two exhaust system options on car 19-G4, which is delayed due to radiator alterations. | ||
| View original record | To RHC. From Ha/Rm. YS30. Ha/Rm.6/MJ.22.7.31. EXHAUST SYSTEM - 19-G4. In view of the fact that this car is held up for radiator alterations, we should like to have the complete exhaust system to… | ||
| 07-page132 | Request to supply and test modified exhaust manifolds for 20 HP and Phantom I cars. | ||
| View original record | COPY. 85230 To RHC. From Ha/Lid. He/Lid.8/MJ.22.7.31. EXHAUST MANIFOLDS. X.5230. X.8230. Will you please supply the following modified exhaust manifolds. As we have no engines suitable for any of… | ||
| 07-page133 | Testing modified exhaust manifolds to resolve cracking issues on 20 HP and Phantom I cars. | ||
| View original record | 85230 To Hm. From Hs/Lid. Hs/Lid.9/MJ.22.7.31. X.8230. X.5230. X4013. QUARTERLY COMPLAINTS. CRACKED EXHAUST MANIFOLDS P.1 & 20 HP. We have several modified types of exhaust manifolds suitable for 20… | ||
| 07-page134 | Quarterly complaints of cracked exhaust manifolds on Phantom 1 & Phantom 11 models. | ||
| View original record | COPY. Y5230. X.4013. X.8230. X.5230. To Hs. Derby. SEVRES Hm/VA3/MLG.28.7.31. QUARTERLY COMPLAINTS Cracked exhaust manifolds Phantom 1 & Phantom 11. With reference to your memo Ha/Lid.9/MJ.22.7.31. we… | ||
| 07-page135 | Large number of ongoing complaints about the short life of exhaust system silencers. | ||
| View original record | COPY. 85230 S/V. Wor. c. to By. c. to Hs. X.4117. C7/C6.8.31. X.7230. X.5230. Re. QUARTERLY COMPLAINTS. In the last return, on the question of the Exhaust System, you will note that we have received a… | ||
| 07-page136 | Instruction to create a new manifold for a W.W. exhaust system on car 19-GIV for an imminent 10,000-mile test. | ||
| View original record | By. from Hs/Rm. Y5230. Hs/Rm4/AD7.8.31. X.5230. X.5840. EXHAUST SYSTEM ON 19-GIV. We have fitted up the latest W.W. exhaust system to this car from the LeC. but we have not a manifold suitable for the… | ||
| 07-page137 | Request to test a front expansion box for the 20/25 HP exhaust system using a different gauge material to overcome a 'tinny' effect. | ||
| View original record | J8230. To RHC. From Ha/Lid. Ha/Lid.2/MJ.19.8.31. 20/25 HP. EXHAUST SYSTEM. Will you please make up for test a front expansion box to N.Sch.3286 but in 10 gauge material (.128); this experiment is to… | ||
| 07-page138 | Communication regarding a design issue where the exhaust silencer mounting interferes with gearbox removal. | ||
| View original record | P.A. c. Hs. c. PHC. X5230 BY.10/G. 26.8.31. RECEIVED 27 AUG 1931 JAPAN 1. N. SCH. 3287. RE EXHAUST SILENCER We notice that you are supporting the silencer in the above scheme from the cross member at… | ||
| 07-page139 | Dispatch of experimental Phantom I and 20 HP exhaust manifolds for testing and feedback. | ||
| View original record | To Hm. from Ha/Lid. 85230. Hs/Lid.1/AD4.9.31. P.I and 20 HP. EXHAUST MANIFOLDS. X.4013. X.8230. X.5230. We are sending to you under separate cover the following experimental exhaust manifolds:- 1 set… | ||
| 07-page140 | Standardisation document for a lengthened rear exhaust pipe. | ||
| View original record | RR 730 (100) (24-10-30) R/3335. Y5230 - COMPLETED 8.9.31. STANDARDISATION of CHASSIS PARTS. Description of Parts. LENGTHENED REAR EXHAUST PIPE. Origin. To carry exhaust fumes away to rear of chassis… | ||
| 07-page141 | Standardisation form for a new chassis part, detailing costs and application. | ||
| View original record | STANDARDISATION OF CHASSIS PARTS The number of the first chassis on which the new part will be fitted..... 'O' Series. 40/50 HP. 'U' Series. 20/25 HP. Date when chassis will be handed to test.... ----… | ||
| 07-page142 | Request for information on the progress of tests for experimental modified exhaust manifolds on Phantom I and 20 HP cars. | ||
| View original record | To Hm. From Hs/Lid. c. to Sg. X5230. Ha/Lid.1/MJ.2.10.31 EXPERIMENTAL MODIFIED EXHAUST MANIFOLDS. X.4813. X.8230. X.5230. We are particularly anxious to obtain some information on the behaviour of the… | ||
| 07-page143 | 10,000-mile test on a 25 HP engine to resolve exhaust valve trouble by comparing different materials. | ||
| View original record | 85230. Ey. from Hs/Rm. c. RRC. Hs/Rm.8/AD6.10.31. EXHAUST VALVE TROUBLE - 25 HP. Further to our conversation on the telephone, we consider that it would be advisable to run exhaust valves to Lec. 2935… | ||
| 07-page144 | Status of fitting experimental modified exhaust manifolds to customer vehicles. | ||
| View original record | COPY. X5230. Sevres/Hs/Lid. Hm/VA16/GM.6.10.31. X.4013. X.5230. X.5230. Re. Experimantal Modified Exhaust Manifolds. With reference to your memo Hs/Lid1/MJ.2.10.31. the position is this: (1) We are at… | ||
| 07-page145 | Requesting urgent experimental instructions for a 10,000-mile trial on a new exhaust valve design for a 20/25 HP chassis. | ||
| View original record | BY/SS. Y5230. c. Ha/Rm. BY/SS10/N.8.10.31. Re: 20/25 HP. Chassis - Exhaust Valves. ------------------------------------ We attach hereto duplicate/prints of R.R.Sch.103 showing a design of exhaust… | ||
| 07-page146 | Testing of exhaust manifold modifications on customer vehicles. | ||
| View original record | To E. From He/Lid. c. to Sg. Wor. c. to FH. 5230 He/Lid.4/WJ.9.10.31. X.4013. X.8230. X.5230. EXHAUST MANIFOLDS. Referring to E.1/M3.10.11 we are attaching herewith copies of memos dealing with this… | ||
| 07-page147 | Request to test modified exhaust manifolds on customer cars to address a cracking issue on 20 HP and Phantom I models. | ||
| View original record | COPY. Hm. From Hs/Lid. Hs/Lid.9/MJ.22.7.31. QUARTERLY COMPLAINTS. CRACKED EXHAUST MANIFOLDS P.1 & 20 HP. We have several modified types of exhaust manifolds suitable for 20 HP. cars and cast iron head… | ||
| 07-page148 | Arrangement to fit modified Phantom I & P.2 exhaust manifolds to customer cars to address cracking issues. | ||
| View original record | COPY. To Hw. (Derby) SEVRES. Hm/VAY/M.G.28.7.31. QUARTERLY COMPLAINTS. CRACKING EXHAUST MANIFOLDS P.1 & P.2. With reference to your memo Hw/Lid.9/WJ.22.7.31 we think that you will be quite safe in… | ||
| 07-page149 | Modification to the support design for an exhaust silencer. | ||
| View original record | BY. FROM DA. C. to HS. C. to HRC. V5230 DA/11.9.31. W. SCH. 3287 - EXHAUST SILENCER. Replying to EY10/G26631., we had overlooked the fact that this crossmember sometimes requires to be removed, and we… | ||
| 07-page150 | Letter regarding the dispatch and testing of experimental Phantom I and 20 HP exhaust manifolds. | ||
| View original record | COPY. To Hm. From Ha/Lid. Ha/Lid.1/AD4.9.31. P.1 and 20 HP. EXHAUST MANIFOLDS. We are sending to you under separate cover the following experimental exhaust manifolds :- 1 set of 20 HP. manifolds to… | ||
| 07-page151 | Request for information and monthly progress reports on experimental modified exhaust manifolds for P.1. and 20 HP cars. | ||
| View original record | COPY. To Hm. From Hn/Lid. a. to Sgr. Hn/Lid.1/WJ.2.10.31. EXPERIMENTAL MODIFIED EXHAUST MANIFOLDS. We are particularly anxious to obtain some information on the behaviour of the modified exhaust… | ||
| 07-page152 | Design, criticism, and testing of improved exhaust manifolds for various chassis models. | ||
| View original record | COPY. X5230 SG. FROM EH. RL/AS.16.10.31. 03230 (X5230) C. to WOR. HS. PN. EXHAUST MANIFOLDS. Referring to your memo. S116/E21031., designs for improved manifolds for P. 1. chassis of both cast iron… | ||
| 07-page153 | The progress of fitting experimental modified exhaust manifolds to cars. | ||
| View original record | COPY. Sevres. Ha/Lid. RmV/A16/GW.6.10.31. Re. Experimental modified exhaust manifolds. With reference to your memo Ha/Lidl/W.2.10.31 the position is this: (1) We are at present overhauling a Phantom 1… | ||
| 07-page154 | Use of fescolised steel versus Staybrite for exhaust downtake pipes on Phantom II and 20/25 HP chassis. | ||
| View original record | HS. c. HY. c. BY/SS. c. BY/GS. c. ROY. [Handwritten: A5/230] [Handwritten: Y320 X520] BY.3/G. 8.10.31. RE PROTECTION OF EXHAUST DOWNTAKE PIPES FOR PHANTOM II AND 20/25 HP. CHASSIS. You will recollect… | ||
| 07-page155 | The failure of experimental mild steel and 'fescolised' exhaust pipes. | ||
| View original record | HS. 2.10.31. 32 EXHAUST PIPES. We have been experimenting with Exhaust pipes, and front expansion chambers made in mild steel, and fescolised to prevent scalding, and to lessen the cost of production.… | ||
| 07-page156 | Request to modify a silencer by substituting a 1.5 inch diameter swan neck flange for the present 2 inch flange for test bed use. | ||
| View original record | RHC. from Hs/Lid. K5-30. Hs/Lid.2/AM2.10.31. Will you please modify the silencer (to N.sch.3287) that was originally fitted to 19-GIV, by substituting a 1 1/2" dia. swan neck flange for the present 2"… | ||
| 07-page157 | The requirement for bigger silencers on P.2 and 25HP exhaust systems. | ||
| View original record | COPY. x5230 SG. FROM R. R2/M20.10.31. X7230 X5230 C. to WOR. HS. C. to BY. E. DA. P. 2. & 25HP. EXHAUST SYSTEMS. Experience at Derby is shewing that we require bigger silencers on both our cars, as… | ||
| 07-page158 | The design and materials for the silencer on the 'U' series 25HP chassis. | ||
| View original record | COPY. X5230 BY. FROM DA/EV. DA/EV/S/120.10.31. X5230 C. to SG. WDR. HS. SILENCER FOR 'U' SERIES - 25HP. R. has agreed to the use of the P. 2. silencer for the short chassis as suggested and tested by… | ||
| 07-page159 | Modifications to the 20/25 HP exhaust fittings for improved silencing tests. | ||
| View original record | RHO. Hs. E.Dept. X5230. BY/SS1/J.20.10.31. 20/25 H.P. Exhaust Fittings. In order to improve the silence of the front Expansion Box, Hs. wishes to test one built up with a cast iron front cover and… | ||
| 07-page160 | Investigation and proposed solution for a broken exhaust manifold. | ||
| View original record | COPY. X5~30. HS. } FROM R. & E. BY. } R1/421.10.31. X5230 Sent off 24.10.31. C. to - SG. WOR. 'CHINA BROKEN EXHAUST MANIFOLD. We have spent considerable time on examining this problem. Personally I… | ||
| 07-page161 | Record of a telephone conversation regarding issues with the Phantom II and 20/25 HP models. | ||
| View original record | E. Hs. BY/Cgh. BY/SS. X5230. BY.2/G. 22.10.31. X7010. (S230) X7380. TELEPHONE CONVERSATION WITH VV. 21.10.31. PHANTOM II. BALANCE WEIGHTS. E. remarked over the 'phone that he intended getting out a… | ||
| 07-page162 | Trial of an improved 20/25 exhaust manifold on the 'China' chassis for a 10,000 miles test. | ||
| View original record | COPY. X5230. BY. FROM E. EL/M23.10.31. (5230) C. SG. WOR. HS. IMPROVED 20/25. EXHAUST MANIFOLD. We send you herewith Lec. 2897. shewing the above. It would be of great advantage if this design of… | ||
| 07-page163 | Change from a WW silencer to a short type Phantom II silencer, with instructions for creating and testing alternative pipe arrangements. | ||
| View original record | K5230. To RHC/HPS. From Hs/Lid. Hs/Lid.C/KT.23.10.31. 18.G.IV. EXHAUST SYSTEM. K563. It has now been decided to drop the WW. silencer in favour of the short type P.II. silencer. We are not yet sure… | ||
| 07-page164 | Test report detailing vehicle performance issues, adjustments, and exhaust system trials. | ||
| View original record | Please file under X583D. 25 H.P. exhaust systems 18.G.IV. 26/10/31. Over-run 50-40 Boom ) Diamond Forward 40-45. Boom ) Mounting. Clutch does not stop easily. Not too easy getting out of 3rd.… | ||
| 07-page165 | Test report on various exhaust system configurations, clutch slip, and engine rattles. | ||
| View original record | (2) (4) P.II. type of front expansion box fitted with lagged box downtake and intermediate. Sputting not too excessive but Roaring period at 28-35 M.P.H. still definately there and exhaust becomes… | ||
| 07-page166 | Best dimensions for a 40/50 model, downtake, intermediate, and an anti-ticking pipe issue. | ||
| View original record | Best Dimensions 40/50 [redacted] 104 downtake 104 intermediate Anti ticking Middle pipe blocked up. | ||
| 07-page167 | Engine power output tests for the 10,000-mile car, comparing different camshafts and exhaust configurations. | ||
| View original record | To R. from Hn/Vm. c. Sg. c. Wor. De. Sa. Hw. Y 5230. Hn/Vm.1/AD27.10.31. X5771 POWER OUTPUT - 10,000 MILE CAR. We have now had the engine on the test bed which has been prepared for the next 10,000… | ||
| 07-page168 | Performance graph comparing a C.I. unit with a C/R & C.XI unit over 10,000 miles. | ||
| View original record | COMPARISON OF C.I. UNIT WITH 5.70 C/R & C.XI UNIT FOR 10,000 MILES P.II COMPLETE SHORT TYPE SILENCER USED IN BOTH CASES C.I. UNIT 112' SHAFT. HIGH LIFT ROCKERS C.XI SCH 1542/3 CAMSHAFT PISTONS E.57122… | ||
| 07-page169 | Blueprint graph of engine power curves from a 10,000-mile unit test, comparing various exhaust system configurations. | ||
| View original record | POWER CURVES UNIT FOR 10,000 MILES TEST 18 G. IV C. XI C/R 5.7 CAMSHAFT Sch: 1542/3 STANDARD CARB: 15% LARGER ① OPEN EXHAUST ② COMPLETE PII SHORT TYPE EX. SYSTEM. ④ N.Sch 3285/6/7 WITH FISH TAIL EXIT… | ||
| 07-page170 | The findings from tests on the Phantom II exhaust system and plans for future improvements. | ||
| View original record | X5330 To E. From Hs/Ha. c. to Sh. Hor. c. to E. Da. c. to Hy. Hs/Ha.1/AT.2.11.31. X7230 LOSSES IN P.II. EXHAUST SYSTEM. With a view to getting some information with the minimum of delay as to the… | ||
| 07-page171 | Performance graph detailing power losses for the Phantom II Short Type exhaust system, comparing Brake Horsepower and Brake Mean Effective Pressure against engine RPM. | ||
| View original record | LOSSES TO EXHAUST SYSTEM. Ph. II SHORT TYPE C.O. OPEN AND CLOSED 4-6 C/R 108° MASKED VALVE CAMSHAFT TWIN CARBS 1.4 CHOKES OPEN EXHAUST COMPLETE Ph II SHORT TYPE EXHAUST SYSTEM C.O. OPEN B.H.P.… | ||
| 07-page172 | Graph analyzing power losses in a Phantom II short type silencer exhaust system under various configurations. | ||
| View original record | RM P34 LOSSES TO EXHAUST SYSTEM PII. ANALYSIS OF COMPLETE PII SHORT TYPE SILENCER 4 G.C.R. 108° MASKED VALVE CAMSHAFT TWIN CARBS 1.4 THROATS B.H.P R.P.M B.M.E.P ① OPEN EXHAUST ② MAIN EXPANSION BOX… | ||
| 07-page173 | Graph analysing power losses in a Phantom II short type silencer exhaust system at different RPMs. | ||
| View original record | LOSSES TO EXHAUST SYSTEM P.I. RM. P35 ANALYSIS OF COMPLETE P.II. SHORT TYPE SILENCER 4.6 C/R 108° MASKED VALVE CAMSHAFT TWIN CARBS 1-1/4" DIA. THROAT B.H.P. R.P.M. CURVE 1: OPEN EXHAUST CURVE 2:… | ||
| 07-page174 | Requesting an update on the progress of tests for modified P.I. and 20 HP exhaust manifolds. | ||
| View original record | To Hbn. from Hs/Ltd. Hs/Ltd.5/KT.2.11.31. X5230. MODIFIED EXHAUST MANIFOLDS. X.8230. X.5230. X.4013. Will you please let us know the present position and progress of tests on the modified P.I. and 20… | ||
| 07-page175 | Modernization of an engine unit and work on exhaust systems for car 19.G.IV. | ||
| View original record | RHO. from Hs/Sn. V5230 Hs/Rn.7/A04.11.31. 19.G.IV. 19.G.IV. will be back at the end of this week to have its engine unit modernised to the 18.G.IV. standard. We are anxious to get the car on the road… | ||
| 07-page176 | Status report on the testing of experimental modified exhaust manifolds on various chassis. | ||
| View original record | Copy X5230. I.4013. I.823D. X.5230. Sevres/Works "Hs" Hm/VAL3/GM.6.11.31. re: Experimental Modified exhaust manifolds With reference to your memo Hs/LiD.5/KT.2.11.31. th present position is this.… | ||
| 07-page177 | Record of a telephone conversation with West Wittering regarding progress on exhaust manifold and carburetter designs. | ||
| View original record | X5230. E. C. E. Dept. C. MB. C. RHC. C. BY/CG1. C. BY/SS. BY.7/G.6.11.31. (X5230) TELEPHONE CONVERSATION WITH WEST WITTERING - 6.11.31. ex/2c/HP. EXHAUST MANIFOLDS. E. was asking us how far we had… | ||
| 07-page178 | Design of a J.S. Exhaust Manifold, referencing blueprint LeC. 2970. | ||
| View original record | BY. FROM E. C. to SG. WOR. HS. XS-230. 23/7.11.31. X5230. J. S. EXHAUST MANIFOLD. We send you herewith blueprint LeC. 2970. shewing the above. In this design the pipe flanges are secured by clamps and… | ||
| 07-page179 | Design of exhaust pipes for an engine model codenamed 'China'. | ||
| View original record | EXTRACT FROM:- X5230. Hs. ) FROM R. By. ) R.2/M.10.11.31. (S230. C. to Sg. Wor. CAR DESIGN WORK. EXHAUST PIPES. 'China' is a bad engine on which to arrange a simple pipe, and we have had to send you… | ||
| 07-page180 | Notification regarding a modification to the J.S. Exhaust Manifold & Pipe. | ||
| View original record | BY. FROM B. X523-8 / 21/21.11.31. X5230 C. to SG. WDR. HS. J. S. EXHAUST MANIFOLD & PIPE. We send you herewith LeC. 2971. shewing side view of the above, also the originals of LeC. 2969 and 2970.… | ||
| 07-page181 | Letter discussing car performance issues and potential modifications for models 19-GIV and 18-GIV. | ||
| View original record | G.W.Hancock from Hs/Rm. Hotel de France, Chateauroux, Indre, France. X5230 Hs/Rm.3/AM.6.11.31. x5340 Many thanks for your letter of the 13th inst. We are interested in your statement re the side… | ||
| 07-page182 | Vehicle road testing, issues with a slipper wheel, and improvements to the gearbox. | ||
| View original record | -2- speeds you can attain on the road and whether you have any signs of crankshaft critical speed when you are running under favourable conditions. With regard to the slipper wheel, we are working on… | ||
| 07-page183 | Various exhaust system tests conducted on a 25 HP engine. | ||
| View original record | To R. from Hs/Rm. X5230. File under exhaust systems Exhaust Systems-25 H.P. Before 18.G.IV. went to France we carried out a number of tests on exhaust systems. Our impression is that the improved… | ||
| 07-page184 | Exhaust system tests focusing on various configurations to reduce noise and improve performance. | ||
| View original record | (2) (4) 2" manifold. P.II. Front Expansion Box. 2" intermediate pipe. P.II. Rear Silencer. 1 1/2" diam. Fishtail pipe. Results are:- Tinniness as before. A bad silencer period at 28-35 M.P.H. on the… | ||
| 07-page185 | Quarterly report from September 1931 analyzing customer complaints about exhaust systems. | ||
| View original record | To SGT. From Hs/Lid. c. Sg. Ey. A. c. Hde. MX. X5230 Hs/Lid.1/ADW.8.11.31. QUARTERLY COMPLAINTS (SEPT. QUARTER 1931). The total number of exhaust system complaints is the most alarming feature of the… | ||
| 07-page186 | Summary of necessary modifications and complaints regarding manifolds, washers, and silencers for various car models. | ||
| View original record | -2- (1) There are many cars under this heading on which the necessary modifications may have to be carried out. 303 20/25 HP. cars; 700 P.II cars; we cannot therefore look forward to an immediate drop… | ||
| 07-page187 | Quarterly report detailing customer complaints about noisy exhausts and their remedies. | ||
| View original record | He/21d.1/AWR.11.11.31 contd. -3- Quarterly Complaints. Exhaust System. Noisy Exhaust. 111 of the complaints during the September quarter were due to exhaust blows. The following analysis indicates the… | ||
| 07-page188 | Summary of customer complaints and remedies for 20 HP, 20/25 HP, Phantom I, and Phantom II car models. | ||
| View original record | -4- (a) The same as for the 20 HP. Test sheet No.201. There are 303 20/25 H.P. cars (up to and including G.T.P. series) to which this modification may have to be fitted. (b) Copper and asbestos, steel… | ||
| 07-page189 | Remedies for sliding joints and an analysis of cracked or broken exhaust manifold complaints across various car models. | ||
| View original record | -5- The remedy for (a) is to modify the sliding joint in accordance with Ed.189. This is a definite cure and all cars turned out from 161-Gy onwards are immune. There are 700 P.II cars made prior to… | ||
| 07-page190 | Ongoing issues and proposed solutions for various car components. | ||
| View original record | -6- shortly be available for test. (3) P.I. We have two alternatives for P.I both of which are unproved. (Malleable iron castings, and sliding joint type manifolds). The Repair Dept. have fitted 4… | ||
| 07-page191 | Replacing cracked 20 HP exhaust manifolds due to persistent failures. | ||
| View original record | X5330 By. from Hs/Lid. Hs/Lid.2/ADL8.11.31. Y836 QUARTERLY COMPLAINTS. CRACKED EXHAUST MANIFOLDS. Owing to the difficulty of testing out 20 HP. and P.I modifications we have decided to adopt the… | ||
| 07-page192 | Exhaust silencers for P.2 & 'U' Series 25HP models, suggesting spot welding instead of riveting. | ||
| View original record | COPY. X5230- HS. } FROM R. R5/M20.11.31. X7230 X5230 BY. } C. to SG. WOR. DA EXHAUST SILENCERS- P. 2. & 'U' SERIES 25HP. We agree that P. 2. short silencer should be used, but we think this can be… | ||
| 07-page193 | Dynamometer tests to determine the power lost in the carburetter air silencer. | ||
| View original record | COPY. X5230. 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… | ||
| 07-page194 | Graph plotting power loss against engine RPM for a P.H. carburettor air silencer on a 20 EX standard car. | ||
| View original record | P.H. CARBURETTOR AIR SILENCER POWER LOSS STANDARD CAR. - 20 EX B.H.P. (CORRECTED) AT ROAD WHEELS ENGINE R.P.M. CUT-OUT OPEN CUT-OUT CLOSED STANDARD CARB'R AIR SILENCER AIR SILENCER OFF COMPLETE ALL… | ||
| 07-page195 | Extract detailing a modification to the exhaust swan neck and fishtail support. | ||
| View original record | EXTRACT FROM: X5230 BY. FROM DA/EV. DA/EV.1/M.26.11.31. X5230 C. to SG. WOR. HS. JAPAN 3. - REAR END. EXHAUST SWAN NECK. This is the same in dia. and has the same fishtail as P. 2. has at present.… | ||
| 07-page196 | Design change for an exhaust swan neck pipe to avoid fouling brake countershafts on the axle. | ||
| View original record | COPY. X5230. BY. FRM DA/EM. DA/EM/S/19.12.31. (5230). Copy to - HS. J. 3. EXHAUST SWAN NECK. You will have discovered no doubt that the exhaust swan neck pipe as drawn on N.scheme 3552 in plan will… | ||
| 07-page197 | Unsatisfactory steering and a cracked exhaust manifold during a 15,000-mile car test in France. | ||
| View original record | Copy. x5230. To Hs. from Sg. Copy to R. Wor. Copy to E. By. re 13-G-4. Sg5/29.12.31. x5240. x5230 Referring to the above car which is now running a 15,000 mile test in France, it is very distressing… | ||
| 07-page198 | Blueprints and a list of parts for the 'Japan III' project. | ||
| View original record | To R.I.C. c. HS/Ra. X5230 BY/CS.S/EH.11.12.31. X5050 X5080 X5231 Re Japan III - Cylinder - Section 5050 Inlet Pipes - Section 5070 Carburetter - Section 5080 Silencer for Exhaust Heated Throttle -… | ||
| 07-page199 | Parts list and instructions for an induction system with nonexpanding carburetters. | ||
| View original record | -3- BY/CS.5/M.11.16.31. cont'd. Section 5080 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… | ||