Rolls-Royce Archives
| Identifier | Entry | ||
| B001_X 93-page01 | To the technical committee proposing a simple scheme to fix explosions in the silencer. | ||
| View original record | Recd. 9/4/12. Le Canadel. March 3rd. 1912 [STAMP: 10 APR 1912] Members of the Technical Committee. X 93 Re Explosions in Silencer. These have troubled us for some time both in closing the throttle… | ||
| B001_X 93-page02 | Throttle control mechanisms and petrol efficiency, comparing a proposed idea to Lanchester's design. | ||
| View original record | (2) but little or no petrol will be carried with it and no explosions will take place. Experiments will prove the correctness of this conclusion, it seems so simple that one would think there was some… | ||
| B001_X 93-page03 | Design drawing with notes for an improved double throttle mechanism. | ||
| View original record | LESLIE IMPROVED THROTTLE (DOUBLE) Stop for throttle now screws here & not externally Note. the internal dia of sleeve must be larger than the spindle in order to allow disc to square itself up with… | ||
| B001_X 93-page04 | Technical committee memo discussing the causes of explosions in the silencer. | ||
| View original record | Mr Wormald Recd. 27/3/12. Le Canadel. 18th March.1912. Technical Committee. X 93 Explosions in Silencer. We have two features which make these rather more prevalent with us than with most cars. - 1.… | ||
| B001_X 93-page05 | Proposal for a scheme to automatically weaken the engine mixture when the car is over-running. | ||
| View original record | (2) The scheme by which I propose, however, to automatically weaken the mixture when the engine is over-running the car is as follows :- It will be remembered that the trouble only occurs when a… | ||
| B001_X 93-page06 | Proposal to the Technical Committee for preventing explosions in silencers when running downhill. | ||
| View original record | Mr Wormald Recd. 27/3/12. Le Canadel. 18th March.1912 Technical Committee. Explosions in Silencers. One easy way we could arrange that the driver could avoid these when running down hill would be as… | ||
| B001_X 93-page07 | Letter discussing the problem of explosions in the silencer and proposing a simple solution involving the throttle and carburetter. | ||
| View original record | R.R. 235a (1004) (PP 289 H 12.12) G 4687. COPY. X93 Le Canadel, 3rd April 1912. Mr Johnson and T. C. Re Explosions in Silencer. These have troubled us for some time, both in closing the throttle when… | ||
| B001_X 93-page08 | Idea for engine throttle control and its benefits compared to other engine designs like the Lanchester. | ||
| View original record | COPY. (2) a small quantity of air to pass the large jet, but little or no petrol will be carried with it and no explosions will take place. Experiments will prove the correctness of this conclusion; -… | ||
| B001_X 93-page09 | Design drawing detailing an improved double throttle mechanism with notes on component assembly and function. | ||
| View original record | LE CANADEL IMPROVED THROTTLE. (DOUBLE) 3-4-12 Stop for throttle now to occur here & not externally Note. the internal dia of sleeve must be larger than the spindle in order to allow disc to square… | ||
| B001_X 93-page10 | Proposal to prevent explosions in the silencer by modifying the hand control and adding an air valve. | ||
| View original record | E.R. No. 200 x93 Re explosions in silencer. TBB4/L3412. Engine Dept. 3.4.12. D.O. With reference to this difficulty which is explained on another note of the same date, will you kindly get out another… | ||
| B001_X 93-page11 | Page with a typed note, likely an instruction or a divider. | ||
| View original record | (100 m) X 796. 14.3.12) G 9452 (2) from the bottom | ||
| B001_X 93-page12 | Request for an experimental design for a special throttle to overcome explosions in the silencer when running downhill. | ||
| View original record | Engine Dept. D.O. X93 TBB6/L17412. Will you please get out an experimental design for a special throttle, in accordance with the attached rough sketches. This scheme is for the purpose of overcoming… | ||
| B001_X 93-page13 | Page indicating a temporary abandonment. | ||
| View original record | -2- temporarily abandoned. R.R.Cº (1000) X.236. 14-7-19. (E) 5793 | ||
| B001_X 93-page14 | Reducing engine vibrations through piston and connecting rod modifications, and a note on a throttle valve alteration. | ||
| View original record | (7) FHR. 18:4:12 X93 piston of correct weight but without tops. If the engine vibrates at 2000 revolutions without any gas pressure, then the cause is most likely due to this variation in kinetic… | ||
| B001_X 93-page15 | To Mr. Royce regarding a visit to drop forging plants and a throttle modification. | ||
| View original record | [Handwritten on left margin]: X93 Put in AWR's to report [Typed text]: Re Drop Forgings. Mr Royce TBB3/L27412. 27.4.12. With reference to your memorandum of April 13th, Mr Wormald and Mr Nadin visited… | ||
| B001_X 93-page16 | Progress report on a device test, noting a slight engine hesitation issue under investigation. | ||
| View original record | -2- tion than to report to you prematurely. When the device left the Works, the Experimental Dept. had not had time to make a test owing to the rush in getting the chassis away. The Test Dept. have… | ||
| B001_X 93-page17 | Departmental memo about a temporary fix for silencer explosions using a felt pad that caught fire, and a request for a non-combustible version. | ||
| View original record | R.R. 475 (59)(H) (X 737. 18.3.12) E.P. 1493. ROLLS-ROYCE LIMITED, NIGHTINGALE ROAD, DERBY. TELEGRAMS: "ROYCAR," DERBY. TELEPHONES: 813 (TWO LINES). DEPARTMENTAL MEMO. This column is for Name of Person… | ||
| B001_X 93-page18 | Departmental memo about a successful experiment concerning petrol knocking in the carburettor. | ||
| View original record | 473 (50,H) (X 737. 18.3.12) E.P. 1493. ROLLS-ROYCE LIMITED, NIGHTINGALE ROAD, DERBY. TELEGRAMS: "ROYCAR," DERBY. TELEPHONES: 813 (TWO LINES). DEPARTMENTAL MEMO. This column is for Name of Person… | ||
| B001_X 93-page19 | Letter to Mr Royce discussing two schemes for a special throttle and low-speed throat valve. | ||
| View original record | Mr Royce Re special Throttle and Low Speed throat valve for overcoming explosions in the silencer. ----------------- I send you attached two schemes of your suggested device. Scheme A is in accordance… | ||
| B001_X 93-page20 | The experimental testing of a low-speed valve, carburetter modifications, and issues encountered such as a fire. | ||
| View original record | -2- of the low speed valve from rotating. No other alteration is necessary. We have sent through to the Shops an experimental set in accordance with scheme A. The tests with the rough device fitted up… | ||
| B001_X 93-page21 | Departmental memo regarding tests on double throttle and Polyrhoe carburettors to understand explosions in the silencer. | ||
| View original record | ROLLS-ROYCE LIMITED, NIGHTINGALE ROAD, DERBY. TELEGRAMS: "ROYCAR," DERBY. TELEPHONES: 813 (Two Lines). DEPARTMENTAL MEMO. This column is for Name of Person addressed. Mr Royce through Mr Barrington.… | ||
| B001_X 93-page22 | Departmental memo discussing engine trouble accentuated by the induction pipe cock during retardation after running at high speeds. | ||
| View original record | 475. (30 H) (X 896. 3-5-12) E.P. 1780. ROLLS-ROYCE LIMITED, NIGHTINGALE ROAD, DERBY. TELEGRAMS: "ROYCAR," DERBY. TELEPHONES: 813 (Two Lines). DEPARTMENTAL MEMO. This column is for Name of Person… | ||
| B001_X 93-page23 | Departmental memo discussing engine misfiring and comparing carburettor performance regarding a 'fading away' effect and fuel spray. | ||
| View original record | ROLLS-ROYCE LIMITED, NIGHTINGALE ROAD, DERBY. TELEGRAMS: "ROYCAR," DERBY. TELEPHONES. 813 (Two Lines). DEPARTMENTAL MEMO. This column is for Name of Person addressed. DATE. 3/ As it is, after… | ||
| B001_X 93-page24 | Departmental memo regarding a suggested carburettor alteration and the availability of double throttles. | ||
| View original record | 175. (5 H) (X 896. 3-5-12) E.P. 1780. ROLLS-ROYCE LIMITED, NIGHTINGALE ROAD, DERBY. TELEGRAMS: "ROYCAR," DERBY. TELEPHONES: 813 (Two Lines). DEPARTMENTAL MEMO. This column is for Name of Person… | ||
| B001_X 93-page25 | Explosions in the silencer and the effect of changing ignition plug types from Pognon to Bosch. | ||
| View original record | R. 475 (100 H) (X 896. 3-5-12) E.P. 1780. ROLLS-ROYCE LIMITED, NIGHTINGALE ROAD, DERBY. TELEGRAMS: "ROYCAR," DERBY. TELEPHONES: 813 (Two LINES). DEPARTMENTAL MEMO. This column is for Name of Person… | ||
| B001_X 93-page26 | Departmental memo regarding the satisfactory standard use of Bosch plugs, specifically in Mr Johnson's car 'The Mystery'. | ||
| View original record | R.I 475 (100 H) (X 896. 3.5.12) E.P. 1780. ROLLS-ROYCE LIMITED, NIGHTINGALE ROAD, DERBY. TELEGRAMS: "ROYCAR," DERBY. TELEPHONES: 813 (Two Lines). DEPARTMENTAL MEMO. This column is for Name of Person… | ||
| B001_X 93-page27 | Explosions in the silencer and the performance of Pognon versus Bosch ignition plugs. | ||
| View original record | Re Explosions in Silencer. TBB1/L12712. Mr Elliott. 12.7.12. With reference to the above matter, Mr Platford reports as follows:- "With reference to the above and Mr Royce's sheet of July 5th as to… | ||
| B001_X 93-page28 | Page 2 of a memo discussing the performance of Bosch plugs fitted as standard. | ||
| View original record | -2- the engine has been stopped. Mr Johnson's car "The Mystery" as referred to by Mr Royce is fitted throughout with Bosch plugs. We have now been fitting Bosch plugs as standard for over 12 months… | ||
| B001_X 93-page29 | Departmental memo regarding explosions in the silencer and carburettor jet modifications. | ||
| View original record | R.R. 475 (100 H) (X 896. 3-5-12) E.P. 1780. ROLLS-ROYCE LIMITED, NIGHTINGALE ROAD, DERBY. TELEGRAMS: "ROYCAR," DERBY. TELEPHONES: 813 (Two Lines). DEPARTMENTAL MEMO. This column is for Name of Person… | ||
| B001_X 93-page30 | Report comparing a Special Double Throttle carburetter with a Polyrhoe carburetter regarding explosions in the silencer. | ||
| View original record | TBB6/L25712. Re Explosions in Silencer. Mr Royce 25.7.12. Tests with Special Double Throttle and with Polyrhoe Carburetter. Mr Platford reports as follows:- "With the Polyrhoe we have not been able to… | ||
| B001_X 93-page31 | Diagnosis of engine trouble involving explosive gas in the silencer and issues with the induction pipe and carburetter. | ||
| View original record | -2- through the engine, probably too strong but forms an explosive gas in the silencer. It is a fact that the opening of the induction pipe cock on the retard accentuates the trouble. This trouble… | ||
| B001_X 93-page32 | Engine performance issues like misfiring and the 'fading away' effect observed during carburetter experiments. | ||
| View original record | -3- Again the fact of opening the induction pipe cock during retardation and closing again as soon as the throttle commences to open causes the engine to do the same. As it is, after accelerating and… | ||
| B001_X 93-page33 | Planned dynamometer experiments comparing two carburettors, including the Polyrhoe. | ||
| View original record | -4- carburetter in quite a nice fine spray. I am arranging to take further experiments on the dynamometer with these two carburetters to see whether the various speeds show the Polyrhoe (for… | ||
| B001_X 93-page34 | Experimental Department report on the cause and cure for explosions in the silencer. | ||
| View original record | Mr Barrington X93 Aug. 19th.12 2100. Below I give Experimental Dept's report RE EXPLOSIONS IN THE SILENCER The damper over the low speed throat cures the explosion due to the petrol that used to be… | ||
| B001_X 93-page35 | Diagnosis of engine explosions in the silencer under various operating conditions. | ||
| View original record | X93 a flame into the silencer. If you go along the road and short a plug, or even switch on or off you do not get a hang but if you retard and switch on battery only you can get one every time.… | ||
| B001_X 93-page36 | Report to Mr Royce from the Experimental Department regarding carburetter tests for a special throttle valve. | ||
| View original record | Mr Royce 20.8.12. Re Carburetter (special throttle valve for low speed throat.) TBB6/L20812. The Experimental Dept. have carried out further tests with this device and they report as follows:- "The… | ||
| B001_X 93-page37 | Technical note detailing the causes of engine explosions and misfires. | ||
| View original record | -2- milled nut, it cures them all. The explosions seemed to be caused by one or two misfires and then one slow burning charge which is burning when exhaust valve opens and sends a flame into the… | ||
| B001_X 93-page38 | From F.H. Royce regarding distressing exhaust explosions and gearbox noise on Mr Johnson's car. | ||
| View original record | COPY. FHR5/H251112. GRAND HOTEL DU CANADEL, Par le Lavandou (VAR) 25th Nov. 1912 [Handwritten signature and stamp: by Warwick, NOV 28 1912 W'M] Mr Johnson from F.H.R. for T.C. On my last run with Mr… | ||
| B001_X 93-page39 | Mr. Royce's remarks on an urgency report regarding improvements in throttle and cutting off. | ||
| View original record | Rec. 28/4/13. Mr. Royce Remarks On Urgency Report AW/SM14/L8413. X.93 Improvements in throttle and cutting off, low speed should reduce this. Copy | ||
| B001_X 93-page40 | Chasing the progress of experiments on carburetter explosions in the silencer. | ||
| View original record | AW/SM12/L29413 Carburetter - Various experiments for explosions in the Silencer. - X.93 Mr Haldenby 29/4/13 It is now nearly 9 months since Mr Royce asked for this experiment. Is it not possible to… | ||
| B001_X 93-page41 | Chasing up an overdue experiment on carburettor explosions in the silencer, requested by Mr Royce. | ||
| View original record | R.R. 6/6 (20 H) (PP 780. 27.3.13) E.P. 3882. ROLLS-ROYCE LIMITED, NIGHTINGALE ROAD, DERBY. TELEGRAMS: "ROYCAR," DERBY. TELEPHONES: 476 (FOUR LINES). DEPARTMENTAL MEMO. AW/SM12/L29413 This column is… | ||
| B001_X 93-page42 | Cover memo requesting an update on instructions for experiments concerning explosions in the silencer. | ||
| View original record | Wor/Sll/L27513 Re Explosions in the Silencer. - X.93 R. 27/5/13 We attach herewith a copy of your memo dated 26th August 1912. We understand that the experiments suggested therein have not yet been… | ||
| B001_X 93-page43 | Engine exhaust backfiring, known as 'firing in silencer', and the potential effects of boilers and a new cylinder head. | ||
| View original record | To Hs. from R. X.93. R2/M28.4.25. FIRING IN SILENCER. X.93. With reference to the question of firing in the exhaust we have not heard whether the boilers had any effect on this. If we are going to… | ||
| B001_X 93-page44 | Issue of popping in the exhaust on the new Phantom model and modifications made to address it. | ||
| View original record | To B.J. from Hs. x93 Hs2/LG6.3.26. POPPING IN THE EXHAUST ON NEW PHANTOM. X8230 In regard to the popping in the exhaust, it is all a question of degree. We do not know how to make a car with the… | ||
| B001_X 93-page45 | Investigation into detonation issues on Phantom engines, proposing increased turbulence in the combustion chamber as a solution. | ||
| View original record | To R. from Hs/ACL. c. to CJ. RJ. c. to RG. E. c. to DA. BY. c. to WGR. CY. X93 Hs/ACL1/LGL1.3.26. DETONATION ON PHANTOM ENGINES. X8230 We have recently been investigating the problem of detonations on… | ||
| B001_X 93-page46 | Phantom engine performance issues, comparing fuel consumption, self-ignition, and detonation to the Silver Ghost. | ||
| View original record | contd :- -2- (1) Under full throttle conditions the Phantom engine is 16% better for petrol consumption than the Silver Ghost under similar conditions. On the road we are not satisfied that we get the… | ||
| B001_X 93-page47 | Engine detonation tests, focusing on the effects of ignition plugs and engine speed. | ||
| View original record | contd :- -3- jackets and find that if anything it is slightly less than when we run on benzol which eliminates detonation. During this test it was found that if we fitted ignition plugs which cause… | ||
| B001_X 93-page48 | Engine detonation tests involving varied carburetter air temperatures and news of a new cylinder head for the Phantom. | ||
| View original record | contd :- -4- there has been any appreciable downward movement of the pistons. During the tests we tried the effect of different air temperatures to the carburetters. The temperature was varied from… | ||
| B001_X 93-page49 | Customer complaints about popping and explosions in the New Phantom exhaust. | ||
| View original record | Handwritten: HS Handwritten: X93 To R. from BJ. Copy to Hs. Copy to EP. Copy to PN. Copy to CWB. Popping and Explosions in Exhaust. New Phantom. We are still distressed in regard to popping in the… | ||
| B001_X 93-page50 | The issue of popping and explosions in the exhaust of the New Phantom model. | ||
| View original record | COPY. To BJ. from CWB. Copy to PN. Copy to H. CWB3/PD/10/5/26 Popping and Explosions in Exhaust. New Phantom. This trouble is still a serious one and is the cause of much comment and adverse criticism… | ||
| B001_X 93-page51 | Governor control issues and exhaust popping in the New Phantom model. | ||
| View original record | COPY. To BJ. (contd.) - 2 - CWB3/PD10/5/26 This would appear to indicate a lack of power of the governor control over the throttle, and to be primarily due to friction effects. It is considered that… | ||
| B001_X 93-page52 | The causes of explosions in the silencer, related to the carburettor's operation at low throttle. | ||
| View original record | TO HS.) FROM R. EP ) C. to Wcr. BY. BJ. Rg. E. re. EXPLOSIONS IN SILENCER. -X.8230. 7.EX. is a particularly good car for this, and there are reasons to believe that explosions in the silencer are… | ||
| B001_X 93-page53 | Engine issues for car 7-EX, specifically firing in the exhaust, self-ignition, and running backwards after extended mileage. | ||
| View original record | To Hs. from R. c. to BJ. Wor. c. to RG. CWB. c. to BY. FN. X93 R6/M4.6.26. 7-EX - FIRING IN EXHAUST ETC. X.8040 X.8230 X.699 XG12 X.93 7-EX has run 8,600 miles mostly in France I think without any… | ||
| B001_X 93-page54 | Engine pinking and detonation, and the suitability of using National Benzol Mixture fuel. | ||
| View original record | CWB. To EH. from Hs. X.93 Hs4/LG14.6.26. PINKING AND DETONATION. V53 Replying to your CWB1/GM9.6.26. We have found no disadvantages in using Benzol mixture. R. frequently uses this fuel on cars he… | ||
| B001_X 93-page55 | Experiments to determine the cause of explosions in the silencer of a Phantom vehicle. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to RG. E. c. to DA. BY. c. to OY. X93 Hs/ACL1/LG1S. 8: 26. EXPLOSIONS IN SILENCER ON PHANTOM. X8230 X93 x8080 We have carried out some experiments with the object… | ||
| B001_X 93-page56 | Analysis into the cause of continuous explosions when an engine is coasting with a slightly open throttle. | ||
| View original record | contd :- -2- By these means we were able to reproduce the trouble laid down in each of the afore mentioned cases. From general observation of the first tests with this apparatus we were prompted to… | ||
| B001_X 93-page57 | Experimental results report on engine firing issues related to exhaust manifold, mixture strength, and throttle settings. | ||
| View original record | contd :- -3- We put forward some experimental results in support of the above theory. One exhaust manifold was removed to give a clear view through the exhaust ports. The engine was motored over at… | ||
| B001_X 93-page58 | Analysis of engine explosions in the exhaust manifold under different throttle and mixture conditions. | ||
| View original record | contd :- -4- For the next experiment the engine was motored at 1000 r.p.m. with the carburetter mixture control normal and the throttle adjusted until explosions took place in the exhaust manifold and… | ||
| B001_X 93-page59 | The causes of explosions in the exhaust manifold and silencer. | ||
| View original record | contd :- -5- the exhaust dilution as in the other cases. A certain amount of fuel will line the induction system, particularly so if fairly wide throttle and low speed has been used previously.… | ||
| B001_X 93-page60 | Experiments concerning explosions in the silencer of a Phantom model, focusing on the effect of admitting air to the induction pipe. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to E. Da. c. to Ev. Oy. X93 HS/ACL/T23.8.26. EXPLOSIONS IN SILENCER OF PHANTOM. X8230 We have continued experiments on explosions in the silencer and have… | ||
| B001_X 93-page61 | Analysis of engine running conditions, focusing on air dilution, silencer explosions, and the effects of a rich mixture. | ||
| View original record | Contd. -2 Hs/ACLL/T23.8.26. Its usefulness was extremely limited because if under one particular set of conditions enough air were admitted it would give an inadequate supply for larger throttle… | ||
| B001_X 93-page62 | Investigation into irregular firing and exhaust explosions related to carburettor mixture and ignition timing. | ||
| View original record | Contd. -3- HS/ACL1/T23.8.26. If, however, the throttle is slightly closed the explosions will start again. An explanation of this is that the rich mixture from the carburetter combined with the… | ||
| B001_X 93-page63 | Technical report on tests to reduce explosions in the exhaust system using wire gauze and considering the effect of the governor. | ||
| View original record | Contd. -4- Hs/ACL1/T23.8.26. Wire gauze over exhaust port:- Copper gauze screens over the exhaust ports, although not entirely preventing the trouble certainly reduce the tendency, but as they very… | ||
| B001_X 93-page64 | Summary of methods to prevent continuous explosions in the silencer. | ||
| View original record | Contd. -5- Hs/ACL1/T23.8.26. opening up and again perhaps just after shutting the throttle. At present we know no means of preventing this. Our next step in this direction is to see to what extent the… | ||
| B001_X 93-page65 | Experiments to fix silencer explosions and autovac issues on the 8-EX car. | ||
| View original record | X93 To PN. from Hs. c. to BJ. Hs1/LG6. 9.26. 8-EX CAR. We have not been able to fit to this car any scheme for reducing the explosions in the silencer or preventing the autovac affecting slow running.… | ||
| B001_X 93-page66 | Letter concerning a customer complaint about a backfiring issue on a New Phantom chassis. | ||
| View original record | S/W. Hs. Copies to:- R. N. Wor. CWB. X 93. Hr8/PD/10-9-26. Backfiring - New Phantom Chassis. Below is copy of a letter we have just received from Mr. Nutt of Barkers. BJ. has seen this and asked me to… | ||
| B001_X 93-page67 | Investigations into explosions in the silencer, comparing the Phantom to the Silver Ghost. | ||
| View original record | To Hr. from Hs. c. to BJ. c. to Wor. x93 Hs2/LG11.9.26. x93 x8230 EXPLOSIONS IN SILENCER. Replying to HrS/PD10.9.26. Investigations are being carried out in connection with this fault, but at the… | ||
| B001_X 93-page68 | Engine issue known as 'popping back', its causes, and a comparison with other engines. | ||
| View original record | To HS. from R. c. to BJ. for HR. X93 R2/M13.9.26. PHANTOM. X.8080. X.93. X.8230. HR. writes of "popping back". I am not sure what this means. We generally understand the term to mean "in the… | ||
| B001_X 93-page69 | Letter from the American branch about explosions in the silencer when descending hills. | ||
| View original record | ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. Oy8-E-91726 September 17, 1926 Mr. E. W. Hives, Rolls-Royce, Ltd., Derby, England. Dear Mr. Hives: Re Explosions in Silencer Carburetter - Sec.5080 We… | ||
| B001_X 93-page70 | Requesting an update on the examination of a Phantom car reported to have explosions in the silencer. | ||
| View original record | To BJ. from Hs. c. to Wor. X93 Hs2/LG5.10.26. EXPLOSIONS IN SILENCER. X8230 Some time ago we asked that we might examine a Phantom car which was complained of for this fault. There was at that time a… | ||
| B001_X 93-page71 | Investigation into the cause of explosions in silencers. | ||
| View original record | To OY. from Hs. X93 Hs2/LG6.10.26. EXPLOSIONS IN SILENCER. X93 X8230 In reply to OY8/E9.17.26. We are very interested indeed in your report on explosions in the silencer. We shall be interested to… | ||
| B001_X 93-page72 | Test procedure for diagnosing explosions in a Phantom model's silencer by creating an adjustable air leak. | ||
| View original record | contd : -2- We suggest that the following simpe test be carried out on your Phantom - which at present is free from this trouble. Disconnect the petrol feed pipe from the starting carburetter, the… | ||
| B001_X 93-page73 | Summary of conclusions from reports on a fault causing explosions in the silencer. | ||
| View original record | To R. from Hs/AJL. c. to BH. Wor. c. to Rg. E. c. to Da. By. c. to OV. 193 Hs/AJL1/T7.10.26 EXPLOSION IN SILENCER. X8230 Attached herewith are reports on this fault. The conclusions are :- (1) Owing… | ||
| B001_X 93-page74 | Conditions under which explosions occur in the silencer of a Phantom chassis. | ||
| View original record | Hs/AJLl/T7.10.26. EXPLOSIONS IN SILENCER (PHANTOM) We have carried out a series of tests on the above fault which is present in some degree on all Phantom chassis, with the following results.… | ||
| B001_X 93-page75 | The causes of engine explosions related to governor and throttle settings. | ||
| View original record | -2- Contd. (b) If the governor controls are set correctly and work freely there is no possibility of the governor opening the throttle or preventing it from closing at speeds above three to five miles… | ||
| B001_X 93-page76 | Analysis of methods to eliminate induction system explosions by altering the air-fuel mixture. | ||
| View original record | -3- Contd. carburation is at full weak than when full strong. As in (a) and (b) a leak in the induction system greatly intensifies explosions, they are decidedly more noticeable under all carburetter… | ||
| B001_X 93-page77 | Engine slow running, throttle issues, and causes of firing in the silencer. | ||
| View original record | -4- Contd. the extra petrol could be used without upsetting the normal slow running of the engine; it was found that the smallest throttle opening necessary to run the engine is 1 1/2°, this gives a… | ||
| B001_X 93-page78 | Throttle closing issues caused by carbon deposits and worn spindle bearings. | ||
| View original record | -5- Contd. (a) The effect of the gummy carbon deposit (a) is to prevent the throttle from closing fully if released slowly; if it is released quickly the throttle overcomes the resistance of the… | ||
| B001_X 93-page79 | List of general tests carried out with regard to explosions in the silencer. | ||
| View original record | -6- Contd. We give below a list of more general tests which have been carried out with regard to explosions in the silencer :- (1) A leak was made in the induction pipe and compensated for by… | ||
| B001_X 93-page80 | List of checks and potential improvements for engine running faults relating to the throttle and carburetter. | ||
| View original record | Contd. -7- (a) Correctly set, and free governor operation. (b) Good fitting throttle. (c) Good throttle spindle bearings. (d) Clean throttle. (e) Sound, non-leaking induction system. (f) Carburetter… | ||
| B001_X 93-page81 | Investigation into the causes of silencer explosions, comparing the Silver Ghost and Phantom models. | ||
| View original record | EXPLOSIONS IN SILENCER (SILVER GHOST) In connection with investigations carried out on Phantom cars relative to explosions in the silencer, we have carried out similar tests on a Silver Ghost car. It… | ||
| B001_X 93-page82 | Comparison of ignition characteristics and throttle design between the Silver Ghost and Phantom models. | ||
| View original record | -2- Contd. We are now assuming that ignition of small charges is completed in the cylinder on the Silver Ghost but in the case of the Phantom ignition commences in the cylinder and is completed in the… | ||
| B001_X 93-page83 | Technical note comparing silencer explosions and fuel mixture requirements between the Silver Ghost and Phantom models. | ||
| View original record | -3- Contd. Once the correct mixture for silencer explosions is obtained on a Silver Ghost, the explosions are equally as violent and numerous as on a Phantom under similar conditions. It was noticed… | ||
| B001_X 93-page84 | Explosions in a silencer, referencing the Barker Trials Car. | ||
| View original record | S/W. Hs. X93 CWB25/GM/8-10-26. Explosions in Silencer. Reference your Hs2/LG6.10.26. The Barker Trials Car which you mentioned is not very bad, it is an ordinary standard. I will keep my eyes open for… | ||
| B001_X 93-page85 | Explosions and engine stalling issues in the New Phantom model. | ||
| View original record | 493 To Hs. from BJ. Copy to H. Explosions in New Phantom Silencer. BJ13/E18/10/26 With reference to H9/IW/15/10/26, I feel sure you will appreciate the importance of the explosions in the silencer… | ||
| B001_X 93-page86 | Telegram about trying a Phantom vehicle, investigating silencer explosions and viewing the latest standard. | ||
| View original record | RR 144A (50BKS.) (DB B14 6 5-25) MP 317384 ROLLS-ROYCE LTD. X83 TELEGRAM RECEIVED BY TELEPHONE. STAMP: FD OCT 19 1926 RECEIVED Time Received 12.35 Date 19-10-26 To Roypar Derby By MBA from London R… | ||
| B001_X 93-page87 | Telegram message regarding a chassis with 'minimum explosions' and a request to test drive it. | ||
| View original record | RR 144A (50BKS.) (DB B14 6-25) MP 317384 ROLLS-ROYCE LTD. TELEGRAM RECEIVED BY TELEPHONE. Time Received Date To By from 2 chassis as example of minimum explosions of which we need not be ashamed stop… | ||
| B001_X 93-page88 | Test of a special throttle ball bearing to prevent silencer explosions in Phantom cars. | ||
| View original record | Y93 To Hs. from BJ. Copy to wor. Copy to EP Copy to PN. Copy to CWB Copy to H. Copy to HJH. Explosions in Silencer, BJ7/E20/10/26 I was glad to have an opportunity of trying the two cars at Derby… | ||
| B001_X 93-page89 | Customer complaints about engine noise and throttle issues, proposing testing a car without a governor. | ||
| View original record | X93 To Hs. from BJ. Copy to Wor. Copy to DY. Copy to PN. Copy to CWB BJ10/E22/10/26 I was discussing with R. yesterday the number of complaints we are receiving in regard to explosions in the exhaust… | ||
| B001_X 93-page90 | Two potential modifications for the Phantom throttle control, weighing cost, performance, and driver experience. | ||
| View original record | To Hs. from R. c. to BJ. OY. c. to BY. PN. c. to E. CWB. x93 R5/M2.11.26. PHANTOM THROTTLE. X. 8140 X. 93 Originally this was fitted without a governor, opened positively a small amount by hand… | ||
| B001_X 93-page91 | Comparing governor and positive throttle control systems to prevent explosions in the silencer. | ||
| View original record | To R. from Hs/AJL. c to Ev. Wor. c to RSy. F. c to Bay. FA. X93 Hs/AJL1/T/15.11.26. X8140 X8230 X3436 EXPLOSIONS IN SILENCER. THROTTLE CONTROL. Tests we have carried out indicate that a positively… | ||
| B001_X 93-page92 | Report page discussing throttle and governor control adjustments to prevent explosions in the silencer. | ||
| View original record | contd :- -2- It is very important that all controls be adjusted to ensure that the throttle closes when the governor lever is at the bottom of the quadrant. In previous reports we have emphasised very… | ||
| B001_X 93-page93 | Analysis of engine explosions, comparing the Phantom model unfavourably with the Silver Ghost. | ||
| View original record | contd :- -3- lever is set to drive the car, consequently the range over which explosions can occur is relatively small. Our recommendations for reducing explosions to a minimum were given in… | ||
| B001_X 93-page94 | Performance noting it is quieter than the Phantom and a mention of an upcoming report on the roller bearing throttle. | ||
| View original record | contd :- -4- slightly quieter than the Phantom and absorbed considerably more H.P. We hope to be in a position to report on the roller bearing throttle in the course of the next few days.… | ||
| B001_X 93-page95 | Cause of 'spitting in silencer' being badly bedded butterfly throttles and a proposed fix. | ||
| View original record | Y93 To Pt. from Hs/RM. Hs/Rm5/LG17.10.27. SPITTING IN SILENCER. Y8990 The more we see of this complaint the more certain we are that in the main it is caused by badly bedding in butterfly throttles.… | ||
| B001_X 93-page96 | Proposal to experiment with a third valve in an internal combustion engine to address detonation. | ||
| View original record | 493 Hs. Derby. Copies to:- Whr. London By. Derby E.P. Derby C.W.B. Since Professor W. A. Whatmough appears to have made out a good case for his theory that though many circumstances may contribute yet… | ||
| B001_X 93-page97 | Page 2 of a letter with a handwritten response discussing engine detonation, turbulence, and volumetric efficiency. | ||
| View original record | -2- Hs. Derby. a considerably higher ceiling might be obtained for aircraft engines. I do not know whether this idea appeals to you or not, nor do I know whether someone has already patented the… | ||
| B001_X 93-page98 | Engine detonation, roughness, and volumetric efficiency. | ||
| View original record | To Pt: from Hs/Rn. c. to Whr. c. to BY. c. to EP. c. to CWB. Hs/Rn7/LG21.12.27. We thank you for your Pt1/FB11.11.27: Detonation in our experience seems to have widely different characteristics on… | ||