Rolls-Royce Archives
| Identifier | Entry | ||
| scan0001 | 'EAC' over-oiling and the effectiveness of scraper ring bevel orientation. | ||
| View original record | R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. 48980 REF. HS4/LG27. 2. 25. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. S E C R E T. 'EAC' OVER-OILING.… | ||
| scan0002 | Explaining the phenomenon of cylinder over-oiling related to the orientation of chamfered piston rings. | ||
| View original record | R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF. Hs/ACL/LG27.2.25. RE. CYLINDER OVEROILING - E.A.C. Observation of the different results obtained with the standard rings… | ||
| scan0003 | Instructing Mr. Lidsey to conduct oil consumption tests on car 98-NK and to modify the relief valve. | ||
| View original record | Mr. Lidsey. from Hs. X8980 Hs/LG9.3.25. EAC. - OIL CONSUMPTION. We should like you to carry out tests on 98-NK car in connection with the excessive oil consumption. For one day, the car should be… | ||
| scan0004 | Oil consumption for EAC engines, detailing tests on piston ring modifications. | ||
| View original record | R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. X8980 REF: TxxxXx HS2/LG13.3.25. To R . from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. S E C R E T. OIL… | ||
| scan0005 | Drawing of 'L' section rings used in oil consumption experiments. | ||
| View original record | 'L' SECTION RINGS USED IN CONNECTION WITH E.A.C OIL CONSUMPTION EXPTS. .067 .0855 .138 .043 .085 .185. .150. .095 10/1 | ||
| scan0006 | Graph of oil consumption curves for an E.A.C. engine running at 3/4 full load. | ||
| View original record | OIL CONSUMPTION CURVES FOR E.A.C. ENGINE RUNNING 3/4 FULL LOAD OIL - PRICES MOTORINE C AVGE. OIL TEMP. 60°C " WATER " 80°C PISTONS & RINGS USED FOR THESE TESTS [Diagram 1] STD. PISTON & RINGS [Diagram… | ||
| scan0007 | Piston design, oil consumption, and analysis of a broken piston. | ||
| View original record | To E. from R. c. to CJ. RG. BY. c. to Hs. 78980 S E C R E T. R1/M23. 3. 25. E+ A. C. PISTONS AND OIL CONSUMPTION. X. 8040 X. 8980 (741) Regarding pistons and oil consumption, since tests shew it is… | ||
| scan0008 | 'V' series engine oil consumption comparing different piston designs. | ||
| View original record | R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: HS4/LG1.4.25. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. S E C R E T. X8980 EAC. 'V' SERIES - OIL… | ||
| scan0009 | Graph comparing the oil consumption of an E.A.C V Series engine using different piston types. | ||
| View original record | OIL CONSUMPTION E.A.C V SERIES CALCULATED ON POWER AT FULL LOAD. OLD TYPE PISTONS. LATEST PISTONS OLD TYPE PISTONS WITH 'L' SECTN RINGS. PTS/HP/HOUR. .03 .02 .01 R.P.M. 2000 2500 2750 | ||
| scan0010 | Graph of oil consumption against RPM for an E.A.C. Engine V Series at 3/4 full load, comparing different piston and ring types. | ||
| View original record | E.A.C. ENGINE V SERIES. OIL CONSUMPTION AT 3/4 FULL LOAD. Y-AXIS: OIL CONSUMPTION. PTS PER. HOUR. X-AXIS: R.P.M. DATA SERIES 1: OLD TYPE STD. PISTONS WITH STD. RINGS & SCRAPER DATA SERIES 2: LATEST… | ||
| scan0011 | Secret internal memorandum discussing piston ring designs and their impact on oil consumption. | ||
| View original record | To HS. & E. FROM R. c. to CJ. BY. S E C R E T. X8980 E. A. C. PISTON, & OIL CONSUMPTION. R7/M15.4.25. X.8040 X.8980 It is very undesirable to have any of the faked systems that I and others have… | ||
| scan0012 | Oil consumption tests for the 'V' series carried out in France. | ||
| View original record | R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. L9980 REF: Hs1/LG15.4.25. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. S E C R E T. TESTS ON EAC. 'V'… | ||
| scan0013 | Comparing oil temperatures and consumption between a 'V' series and a standard 40/50 HP car. | ||
| View original record | R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. +8980 REF. Hs1/LG20.4.25. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. SECRET. EAC. 'V' SERIES - OIL… | ||
| scan0014 | Investigations of an oil relay governor. | ||
| View original record | X8980 EXPERIMENTAL REPORT. COPIES TO: RCJ BJ. WOR. By. E. Da. PMP. OY. RS Expl. No. 8685 8980 REF. Hs5/LG21.4.25. OBJECT OF TEST. Investigations on oil relay governor. TESTER. W. A. Robotham.… | ||
| scan0015 | Modifications to the oil relay ignition governor, specifically addressing issues with sticking inner pistons. | ||
| View original record | R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: Hs/Rml/LG21.4.25. OIL RELAY IGNITION GOVERNOR. We should like to recapitulate the modifications which have been made to… | ||
| scan0016 | Modifications to the ignition advance control springs and hydraulic piston return spring. | ||
| View original record | R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF Hs/Rml/LG21.4. 25. in the pipes or relay on assembly rather than dirt working up from the sump. Neither of the 10,000… | ||
| scan0017 | Issues with a magneto return spring and the failure of cup leathers on test. | ||
| View original record | R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF Hs/RmL/LG21.4.25. The magneto also had a tendency to stick partially advanced if the engine was suddenly stopped when… | ||
| scan0018 | Cup leather failures in pistons, investigating the effects of oil temperature and viscosity. | ||
| View original record | R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -4- Expl. No. REF:Hs/Rm1/LG21.4.25. particular spot. Whenever a cup leather failed it was found twisted over to the top side of the… | ||
| scan0019 | Testing an ignition oil relay leather piston ring. | ||
| View original record | R.R. 493A (50B) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF. Hs/GHR/LG21.4.25. IGNITION OIL RELAY LEATHER PISTON RING. Tests carried out on 8-EAC-11 unit. Chrome leather ring of wider… | ||
| scan0020 | Graph showing the viscosity of Price's Motorine 'C' oil at various temperatures. | ||
| View original record | Graph Showing Viscosity of Price's Motorine 'C' at various temperatures Y-Axis: Degrees Centigrade, 100, 90, 80, 70, 60, 50, 40, 30, 20, 10, 0 X-Axis: Seconds, 1000, 2000, 3000, 4000, 5000 | ||
| scan0021 | Graph of the ignition advance curve with engine requirements under extreme working conditions. | ||
| View original record | IGNITION RELAY GOVERNOR. CONTROL SPRING E.73203 CHROME CUP LEATHER. ALL BACK-LASH TAKEN OUT OF CONTROLS. FLYWHEEL IGNITION ADVANCE POWER MAINTAINED. POWER DROPS 5%. OIL TEMP. 60°-70°C. OIL PR. 25-35… | ||
| scan0022 | Piston ring testing and oil consumption. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. X8980 EXPERIMENTAL REPORT. Expl. No. REF: Hs5/LG22. 4.25. S E C R E T. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. EAC. 'V' SERIES -… | ||
| scan0023 | Telegram from Royce regarding excessive oil consumption and a new design for piston, splasher, rings and trunk. | ||
| View original record | POST OFFICE TELEGRAPHS. (1155) EM252S 15,000M 21/8/23 R.&Co.Ltd. E1501. Handwritten reference: X8980 Office Stamp: DERBY 27APR25 Office of Origin and Service Instructions: Chichester T Words: 27… | ||
| scan0024 | Wire confirmation from Royce to Hives concerning excessive oil consumption and sending a new piston and splasher design for testing. | ||
| View original record | CONFIRMATION OF WIRE. X8980 WEST WITTERING. 27. 4. 25. HIVES. ROYCAR. DERBY. OIL CONSUMPTION PROBABLY DUE TO EXCESSIVE SPRAY SENDING DESIGN FOR PISTON AND SPLASHER YOU TESTING OUT 'L' RINGS AND… | ||
| scan0025 | Experiments for pistons with concave crowns and other components to test for oil consumption. | ||
| View original record | To BY. from E. c.c. to CJ. Hs. 48880 S E C R E T. E2/M28.4.25. E. A. C. X. 8040 X. 8980 PISTON WITH CONCAVE CROWN AND LOWER SCRAPER RING. We send you herewith LeC. 2055 shewing the above. The… | ||
| scan0026 | Extract detailing proposed engine modifications to improve excessive oil consumption. | ||
| View original record | Extract from R1/M29.4.25. (X.8770 X.2565.) X8980 EXCESS OIL CONSUMPTION EAC. X.8980 X.8040 So far the only thing which has shewn an improvement is the L. shpaed ring, but we fear these may not be… | ||
| scan0027 | 'V' series and Condor 'L' shaped piston rings and oil consumption tests. | ||
| View original record | R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. Expl. No. +8980 REF. Hsl/LG1.5.25. S E C R E T. EAC. 'V' SERIES - AND… | ||
| scan0028 | Inconsistent oil consumption results due to the lapping of 'L' shaped piston rings. | ||
| View original record | R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. +8980 Expl. No. REF. HS4/LG13.5.25. to R. from Hs. c. to CJ. BJ. c. to RG. BY. c. to E. DA. c. to Wor. EAC. OIL CONSUMPTION. +8040 We… | ||
| scan0029 | Over-oiling on the 20 HP chassis and stretching rear axle spring clips. | ||
| View original record | Y8980 Wor. c. Hs. ---------- BY16/H. 15.5.25. ---------- Referring to Wor5/M.8.5.25. and Br1/H. 7.5.25. attached, the two points raised should, in my opinion, be dealt with by arranging to have a… | ||
| scan0030 | EAC engine cylinder expansion and oiling problems. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. 48980 REF: Hs1/LG16.5.25. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. EAC. OILING. 48980 + 8050 We have… | ||
| scan0031 | Piston testing to address an over-oiling and oil consumption issue. | ||
| View original record | R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. 48980 REF: Hs7/LG19.5.25. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. E.A.C. OIL CONSUMPTION. 48980 We… | ||
| scan0032 | Graph of test bench results showing oil consumption curves for the E.A.C. engine. | ||
| View original record | OIL CONSUMPTION CURVES FOR E.A.C. ENGINE. TEST BENCH RESULTS. OIL CONSUMPTION. PTS / HOUR. R.P.M. PISTONS WITH SCRAPER RING AT BOTTOM OF SKIRT. AVERAGE STANDARD WITH PLAIN RINGS. 19/5/25. A.C.L.… | ||
| scan0033 | Over-oiling on the EAC engine, suggesting a test with the piston pin oil feed shut off. | ||
| View original record | To Hs. from E. c. to CJ. Rg. X. 8980 E4/M6.6.25. RE. OVEROILING ON EAC. ENGINE. With regard to the above it occurs to us that your tests have checked the effect of every lubrication feature on the… | ||
| scan0034 | The oil consumption of trial cars and requesting continued monthly reports. | ||
| View original record | To PN. from Hs. c. to CWB. c. to BJ. c. to EP. c. to Mx. X8980 Hs2/LG6.6.25. OIL CONSUMPTION OF TRIALS CARS. X8980 We are very interested to hear of the consumption of 101-MC and 103-MC. cars. Hecford… | ||
| scan0035 | Resolving high oil consumption and cylinder overoiling by adopting a new 'L' section ring. | ||
| View original record | X8980 To OY. from Hs. Hs13/LG15.6.25. RE. CYLINDER OVEROILING. On the new car, we have had great difficulty in keeping the oil consumption down at high speeds. It is rather an unusual complaint… | ||
| scan0036 | Cylinder overoiling, explaining the phenomenon through the action of chamfered piston rings. | ||
| View original record | R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. COPY. Expl. No. REF: Hs/ACL/LG27.2.25. RE. CYLINDER OVEROILING - E.A.C. Observation of the different results obtained with the standard… | ||
| scan0037 | Graph of oil consumption versus RPM for an E.A.C. engine, comparing different piston and ring configurations. | ||
| View original record | OIL CONSUMPTION CURVES FOR E.A.C. ENGINE. RUNNING 3/4 FULL LOAD AVGE. OIL TEMP. 60°C WATER IN 70°C OIL- PRICES MOTORINE C PISTONS & RINGS USED FOR THESE TESTS STD. PISTON & RINGS STD. PISTON WITH 'L'… | ||
| scan0038 | Oil consumption figures for three trials cars over the last month. | ||
| View original record | X8980 COPY. TO - P.N. from Bk. c/Bk2/CM11.7.25. Re - Oil Consumption - Trials Cars. Oil Consumption for the last month is as follows :- 101-MC., Barker Landaulet 650 miles 3 pints = 1734 m.p.g.… | ||
| scan0039 | Proposed fix for an oil leak at the rear end of EAC and 20 HP engines. | ||
| View original record | +8980 To BY. from E. c. to CJ. Hs. E1/M27.8.25. EAC. AND 20 HP. ENGINES - OIL LEAK X.8000 REAR END. X.8980 X.5980 Referring to the oil leak on the rear fitting of the high pressure oil gallery pipe… | ||
| scan0040 | Difficulty of creating a list of cars likely to be troubled with over-oiling. | ||
| View original record | +8980 DJ. C. Hs. C. EP. C. Wor C. Hm OVER-OILING. ----------- We are informed by Repair Dept. that you wish us to supply you with a list of cars which are likely to be troubled with over-oiling. At… | ||
| scan0041 | Arranging cures for engine over-oiling in two specific cases and the uncertainty of a permanent solution. | ||
| View original record | HS 78880 BJ18/DN4.9.25. TO BY c. to Hs. ET & OF. FROM BJ OVER-OILING. With reference to BY16/H.1.9.25, we have just heard that this week we have arranged for over-oiling to be cured in two more cases,… | ||
| scan0042 | Request for a list of complaints regarding over-oiling on the New Phantom chassis. | ||
| View original record | S/W. W. S/W. Wm. HS. ER. and S/N. X8980 H/CD1/EP/18.9.25. re:- New Phantom Over-oiling. BJ. has asked me to obtain from you a list of cases of complaint in connection with over-oiling on New Phantom… | ||
| scan0043 | Complaints of over-oiling on specific New Phantom chassis. | ||
| View original record | W/S - H. (strikethrough) C. to Hs. C. to EP. (strikethrough) C. to N. (strikethrough) +8980 Hm/WW9/W21.9.25. Re New Phantom Over-oiling. Your H/CDI/EP/18.9.25. The cases of complaint of over-oiling on… | ||
| scan0044 | Over-oiling problem with the New Phantom car engine after 10,000-mile tests. | ||
| View original record | W/S. To H/CD. from Hs. XS980 Hs5/LG21.9.25. NEW PHANTOM OVER-OILING. H/CD1/BP19.9.25. Excessive oil consumption has been complained of on every experimental Phantom car which has run a 10,000 miles… | ||
| scan0045 | Serious issue of 'overoiling' in the New Phantom model and proposing new testing procedures. | ||
| View original record | 48980 To EP. from BJ. Copy to.... Hs. BJ1/H22.9.25. "NEW PHANTOM". OVEROILING. On the 18th I wrote to H. as follows:- "Please obtain information from Hm, Hs, EP. and N. and your Inspection Dept. of… | ||
| scan0046 | Page 2 of an internal memo regarding a visit to Mr. Royce to provide him with information on a serious situation. | ||
| View original record | To EP. from BJ. Copy to Hs. BJ1/H22.9125. -2- explaining to Mr. Royce how seriously we look on the present situation, and why C.J. has asked you to visit him, in order that he may have the latest and… | ||
| scan0047 | Customer complaints and testing strategies for an overoiling issue on the New Phantom model. | ||
| View original record | C O P Y 48980 To EP. from BJ. c. to Hs. "New Phantom" Overoiling. BJ1/H22.9.25. On the 18th. I wrote to H. as follows:- "Please obtain information from Hm. Hs. EP and N. and your Inspection Dept. of… | ||
| scan0048 | The persistent over-oiling issue in the New Phantom model. | ||
| View original record | R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. +8980 EXPERIMENTAL REPORT. Expl. No. REF: Hs5/LG25. 9. 25. to BJ. from Hs. NEW PHANTOM - OVER-OILING. +8980 BJL/H22.9.25. We take exception to the para. in… | ||
| scan0049 | Page 2 of an experimental report concerning over-oiling problems in cars. | ||
| View original record | R.R. 493A (50 H) (D.D. 31. 12-6-25) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF: less likely to have over-oiling troubles than the first cars. This is proved by the fact that cars which are returned… | ||
| scan0050 | Modifications to a Phantom car going to France, covering the steering, front axle, and engine. | ||
| View original record | To C.J. from R. c. to E.J. Hs. BY. 48980 RL/M26.9.25. RE. PHANTOM CAR GOING TO FRANCE. X.8430 X.8940a X.8980 This car should be kept back for the whole of the modifications we intend doing to the… | ||
| scan0051 | Investigating and proposing a solution for over-oiling on the 'Phantom' engine. | ||
| View original record | R.R. 498a (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. Expl. No. +8980 REF:Hs6/LG28.9.25. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to EP. Mx. c. to Wor. OVER-OILING ON… | ||
| scan0052 | Instruction No.52 for the 40/50-HP Chassis regarding plugging oil holes in inlet rockers to fix excessive lubrication. | ||
| View original record | 48980 Mx/McMS/MC29.9.25. Instruction No.52. 40/50-HP Chassis. RE: LUBRICATION OF CYLINDERS. In order to deal with engines the cylinders of which are giving trouble due to excessive lubrication, and… | ||
| scan0053 | Limitations of high-speed 10,000-mile tests in detecting over-oiling issues on the 'New Phantom' model that only appear in slow traffic. | ||
| View original record | To Hs. from BJ. Copy to.... EP. BJ3/H29.9.25. 48980 "NEW PHANTOM" OVEROILING. Hs5/LG25.9.25. You suggest that BJ1/H22.9.25 stated that it is evident that our 10,000 miles tests in France do not show… | ||
| scan0054 | Specific case of engine over-oiling on a Phantom, sent to the Works for inspection. | ||
| View original record | 18980 To Hs. from CJ. Over-Oiling. CJ8/E1/10/25 In your memo. addressed to R., Hs6/LG28/9/25 concerning over-oiling, on Phantom engine, you write: 'So far we have not seen a bad example of an engine… | ||
| scan0055 | Investigation into an over-oiling complaint on Phantom cars. | ||
| View original record | To CJ. from Hs. 48980 Hs2/LG5.10.25. OVER-OILING. 48980 We are in touch with EP, Test Dept, and Repair Dept. on the over-oiling complaint on the Phantom cars. We saw 11-RC when it arrived at Derby and… | ||
| scan0056 | Lubrication piping system for owner-drivers to reach inaccessible points. | ||
| View original record | 48980 To CJ. from R. c. to BJ. DA. c. to BY. Hs. R7/M13.10.25. LUBRICATION - OWNER DRIVER X. 8980 X. 5980 We must have a piping system to at least the inaccessible points such as :- Back end of front… | ||
| scan0057 | Chassis lubrication, centralized oiling schemes, and the Phantom car. | ||
| View original record | R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. *EXPERIMENTAL REPORT. Expl. No. +8980 REF: Hs5/LGT.15.10.25. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. CHASSIS LUBRICATION. X8980… | ||
| scan0058 | Testing and implementation of the Bijur chassis lubrication system, including a list of 38 lubrication points. | ||
| View original record | To Hs. from OY. C O P Y. OY3-E-10625. RE. BIJUR CHASSIS LUBRICATION. You will have received already the reprints of Bijur's paper on his chassis lubrication system and possibly the demonstration set.… | ||
| scan0059 | General adoption and benefits of centralized lubrication systems, with a specific note on steering for the Silver Ghost. | ||
| View original record | contd :- -2- GENERAL ADOPTION. The first car to adopt a centralized lubrication system was the Cleveland. This was the Bowen system, not nearly as well designed as the Bijur. Last year Packard came… | ||
| scan0060 | Reprint from the Society of Automotive Engineers journal describing a Central-Point Chassis-Lubrication System. | ||
| View original record | Reprinted from THE JOURNAL OF THE SOCIETY OF AUTOMOTIVE ENGINEERS for March, 1925. The Central-Point Chassis-Lubrication System By JOSEPH BIJUR¹ DETROIT SECTION PAPER Illustrated with DRAWINGS AND… | ||
| scan0061 | Detailed explanation of a central-point chassis lubrication system, its components, and operation. | ||
| View original record | 2 CENTRAL-POINT CHASSIS LUBRICATION oil during the pressure period, which lasts for about 1 min. Distribution of the oil is controlled without the use of mechanism or moving parts, hence the equipment… | ||
| scan0062 | Explanation of the central-point chassis lubrication system, detailing oil distribution, component design, and flow control. | ||
| View original record | 6 CENTRAL-POINT CHASSIS LUBRICATION FIG. 11—DISTRIBUTION IN MECHANICAL FRONT-BRAKE AND STEERING CONNECTIONS Oil Is Fed from a Drip-Plug on the Side-Frame, at the Upper Right, through the Ball End of… | ||
| scan0063 | Detailed description of the central-point chassis lubrication system, its components, operation, and an analogy to a single-wire electrical system. | ||
| View original record | 4 CENTRAL-POINT CHASSIS LUBRICATION FIG. 8—CONSTRUCTION OF DIRT-EXCLUDING SPRING-SHACKLE Lateral Travel of Dirt Is Prevented by Overlapping Parts of Splits, Links and Bushings and by Felt… | ||
| scan0064 | The lubrication of steering pivots for the 'Phantom' model. | ||
| View original record | R.R. 493A (50 H) (D.D. 31. 12-6-25) J.H.D. EXPERIMENTAL REPORT. Expl. No. 48980 REF Hs3/LG15.10.25. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. 'PHANTOM'. LUBRICATING OF… | ||
| scan0065 | Slow running tests on a 'New Phantom' chassis to investigate over-oiling issues. | ||
| View original record | S/WT(HS) CJ. Copy to EJ. PR H JLR Wor. EP. Hs. 78980 CW81/LH26.10.25. SLOW RUNNING TESTS. It having been decided to make an exhaustive test to decide whether the tests recently established at "W" for… | ||
| scan0066 | Technical observation on engine cylinder mixture and spark plug condition. | ||
| View original record | -2- stronger than the mixture in the other cylinders. This observation is confirmed by the condition of the plugs in practically every car which is tested. COPY UTD. Carl | ||
| scan0067 | Daily test log detailing mileage, fuel consumption, and observations on engine plug and bore conditions. | ||
| View original record | 114. HQ. DATE. PETROL. OIL. SPEEDO AT START. SPEEDO AT FINISH. MILEAGE. CONDITION AFTER 15 mins Light running PLUGS. First 40 Miles. BORES. CONDITIONS AFTER 15 mins Light Running PLUGS Second 40… | ||
| scan0068 | Cover memorandum regarding over-oiling, attaching a related document for information. | ||
| View original record | To Hs. from BJ. X8980 BJ/Py3/D29.10.25. Re: Over-oiling. I attach for your information a copy of memorandum No. 8659, H1/TB/29.10.25, which may be of interest to you. BJ/Py. Att: 1. | ||
| scan0069 | Customer complaint from Sir Albert E. Bingham about over-oiling on his new Phantom car. | ||
| View original record | H1/TB/29.10.25. (Dictated 28.10.25) POST-WAR (40-50) 1 Py 2. BJ. Memorandum No. 8659. Re: Sir Albert E. Bingham Bt. Ranby House, Retford, Notts. Chassis No. 49-RC - Ch. delivered 5.8.25. Comp.… | ||
| scan0070 | Spark plug options and a note on their performance in different car models. | ||
| View original record | --2-- Memorandum No. 8659. He has decided, therefore, to get in touch with me or with Hm. should he get further trouble with the Bosch plugs and the K.L.G's which he means to try, and Hm. should… | ||
| scan0071 | Strategy for addressing an over-oiling issue on 'New Phantom' models. | ||
| View original record | To-Wor. PN. Hs. H. By. OWB. EP. Br. Copy to Hs. X 8989 BJ3/H30.10.25. OVER-OILING ON "NEW PHANTOMS". With reference to the attached, we shall be obliged if you will give us your opinion, together with… | ||
| scan0072 | Conference memo discussing over-oiling issues and piston ring tests on 'New Phantom' models. | ||
| View original record | To OJ. from BJ. BJ9/H28.10.25. (Dict 27th). OVER-OILING ON "NEW PHANTOMS". A conference was held here this morning, at which were present:- PN. H. EP. CWB. Br. BJ. CWB. handed in a report of slow… | ||
| scan0073 | Resolving engine over-oiling issues, the implementation of special road tests, and procedures for handling customer cars and complaints. | ||
| View original record | 2. BJ9/H28.10.25 (Cont'd.) CWB. mentioned that when a car had had new rings fitted and had then passed through the present special test on the road, there had been no case of the car being returned to… | ||
| scan0074 | Customers over-filling engines with oil and a proposed solution of fitting an overflow cock. | ||
| View original record | 3. BJ9/H28.10.25 (Cont'd.) no but if it shows/sign of giving trouble, nothing should be done to it. When we have found a definite cure, we should consider whether all cars at present delivered should… | ||
| scan0075 | Standardization of detachable ignition plugs for the 'New Phantom' chassis to address overoiling issues. | ||
| View original record | Y8980 BY. Hs. Wor. c. Bd. re: OVEROILING. With regard to the question of ignition plugs for the "New Phantom" Chassis, for which the Lodge non-detachable type is the present standard. Arrangements… | ||
| scan0076 | Special sparking plugs to address over-oiling issues. | ||
| View original record | To Hs. from BJ. Copies to By. H. X8980 BJ1/H4.11.25. SPARKING PLUGS. I attach copies of H2/TB2.11.25 and Bt8/EP2.11.25, concerning special sparking plugs for dealing with over-oiling. Please let me… | ||
| scan0077 | Query asking for consideration on adopting a modification for all chassis prior to dispatch from the Works. | ||
| View original record | (2) EP4/H3.11.25. gone beyond this stage at present. Can this question receive further consideration, please, as to whether it is considered advisable to adopt this modification on all chassis before… | ||
| scan0078 | Issues with non-demountable Lodge sparking plugs on the 'New Phantom' model and the proposal to replace them. | ||
| View original record | C O P Y. To BJ. from H. Copy to CWB. H2/TB/2.11.25. (Dictated 31.10.25). Re Sparking Plugs on 'New Phantom' and Overoiling. I learn that we have issued a large number of New Phantom chassis with the… | ||
| scan0079 | Copy of a letter discussing a customer complaint about the cleanability of standard Lodge spark plugs in an over-oiling engine. | ||
| View original record | C O P Y. Bt8/EP/2.11.25. Re. Chassis No. 51-HC - Lady Regnart. We have received from this owner's secretary a letter which contains the following remark:- "The new car had not been used much, but the… | ||
| scan0080 | Change to demountable Lodge sparking plugs and the issue of plugging oil holes. | ||
| View original record | +8980 EP. Hs Wor. BJ. Hm. BY11/H. 5.11.25. OVEROILING AND SPARKING PLUGS. ---------------------------- Referring to EP4/H. 3.11.25. and BJ1/H. 4.11.25. since the middle of October we have been… | ||
| scan0081 | Plugging the oil hole in the New Phantom's inlet rocker to prevent over-oiling. | ||
| View original record | x8980 E. W. H. C. Hs. NEW PHANTOM ROCKER MECHANISM. VALVES & ROCKER. --------------------------------- I wish to confirm the arrangement arrived at some time ago in agreement with R. and Hs. that… | ||
| scan0082 | Investigation into a customer's suggestion regarding an over-oiling issue on a 40/50 car. | ||
| View original record | To the Experimental Dept. from CJ. Percy F.Chaplin Esq. Mr.Percy Chaplin, who is having trouble with his 40/50 Rolls-Royce car owing to over-oiling, in spite of the fact that we have fitted new rings,… | ||
| scan0083 | New Phantom over-oiling, specifically testing Lodge detachable spark plugs. | ||
| View original record | R.R. 493a (50 H) (D.D. 31. 12-8-25) J.H.D. EXPERIMENTAL REPORT. Expt. No. 78980 REF:Hs/Rml/LG101125 To R. from Hs/Rm. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to EP. Wor. BJ3/H9.11.25. NEW PHANTOM… | ||
| scan0084 | Over-oiling issues and the standardisation of new demountable Lodge sparking plugs. | ||
| View original record | +8980 To EP. from BJ. BJ3/H9.11.25. Copies to -Wor. Sy. Hs. Hm. PH. H. CWB. OVEROILING AND SPARKING PLUGS. As the Works technical officials have presumably tested the demountable Lodge plug and found… | ||
| scan0085 | Testing various spark plugs for over-oiling on the New Phantom model. | ||
| View original record | R.R. 403A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. Expl. No. +8980 REF. Hs/AJL1/LG101125 To R. from Hs/AJL. c. to CJ. BJ. c. to RG. E. c. to DA. By. c. to EP. Wor. NEW PHANTOM -… | ||
| scan0086 | Comparing the mileage before failure of various makes of spark plugs. | ||
| View original record | R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF HS/AJL1/LG101125 mileage before failure of the plug under test being compared with the average mileage of the Lodge… | ||
| scan0087 | Standardization and testing of a demountable Lodge ignition plug. | ||
| View original record | 48980 B.J. Wor. C.HS. Hm. I.H. SWB. BYL/H. 10.11.25. IGNITION PLUG. ----------- BJ3/H.9.11.25. The question of Standardization of the demountable Lodge Ignition plug is under consideration. We have… | ||
| scan0088 | Request for information to reply to a previous memo regarding over-oiling and sparking plugs. | ||
| View original record | X8980 Hs. BY. Wor. for Mx. EP5/H10.11.25. re. Overoiling and Sparking Plugs. With reference to BJ3/H9.11.25. copy of which you have, will you please let me have the necessary information to enable me… | ||
| scan0089 | Forwarding a customer complaint letter regarding a new car oiling up badly. | ||
| View original record | To EP. from BJ. -> Copy to.... Hs. Hm Y8980 BJ8/H12.11.25. Re Sir Albert Bingham: 49-RO. The following is a copy of a letter received by Messrs. Hooper from Sir Albert Bingham concerning the above… | ||
| scan0090 | Design of the vent pipe between the crankcase and carburetter to prevent oil entering the cylinder. | ||
| View original record | x5980 Hs8/LG13.11.25. CJ3/E5.11.25. To CJ. from Hs. Percy F. Chaplin Esq. Y740 In the design of the vent pipe between the crankcase and carburetter, precautions are taken to prevent oil making its way… | ||
| scan0091 | Check tests for New Phantom engine over-oiling, detailing procedures and results for four chassis. | ||
| View original record | Handwritten: See CWB BJ CWB Phoned M.H. Have had no reply to 20th Nov query reply to 20th Nov query to see it Typed: To C.J. from CWB. c. to BJ. c. to MP. c. to Wor. c. to PN. c. to H. re:- New… | ||
| scan0092 | Proposal for special tests at regular intervals during a 10,000-mile car test to gather evidence on component wear. | ||
| View original record | - 2 - OWB6/EP/25.11.25. on this as soon as possible. It would be of advantage if the present car running 10,000 mile test were specially tested from this point of view, say every 3000 miles, during… | ||
| scan0093 | Suggesting a standard over-oiling test for a 'New Phantom' vehicle running in France. | ||
| View original record | S/W. HS. from CWB. XS980 CWB1/EP/28.11.25. re:- 'New Phantom' Over-oiling. Please see attached (CWB6/EP/25.11.25.). Do you think it would be possible to give the car which is now running in France the… | ||
| scan0094 | The investigation into oily brake servo motors and their varying efficiency. | ||
| View original record | R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. Expl. No. +8980 REF. Hs/Rm1/LG1.12.25. To R. from Hs/Rm. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. E.A.C. OILY BRAKE SERVO… | ||
| scan0095 | Issue with oil creeping onto servo friction plates and proposing solutions. | ||
| View original record | R.R. 493a (50 H) (D.D. 31. 12-6-25) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF: Hs/Rml/LG1.12.25. added through the lubricator. It was observed after this test that oil had crept over the crown 'S'… | ||
| scan0096 | Blueprint diagram showing the distribution of oil through a mechanical assembly during excessive lubrication. | ||
| View original record | DISTRIBUTION OF OIL THROUGH EXCESSIVE LUBRICATION AT POINT 'A'. A Z S D Y B X ROLLS-ROYCE, LIMITED PRINT ROOM 11 DEC. '25 DERBY | ||
| scan0097 | The distribution of information to overseas depots about engine overoiling on the 40/50 HP chassis. | ||
| View original record | Hs. [redacted] YT 980 EP/Thn5/H3.12.25. re. 40/50 HP. Chassis - Engine Overoiling. BJ. is anxious that we should issue any information to the overseas depots which is likely to be of service in regard… | ||
| scan0098 | Technical bulletin detailing the symptoms and remedies for engine over-oiling in the 40/50 HP 'New Phantom' chassis. | ||
| View original record | Hk. Paris. Ps. " Whr. India. Mr. Kirby, India. Pt. Australia. Mr. Reeves, Madrid. Paris for Nice. Bk. Sales. H. " Sg. " CWB. " Br. 'N' Mr. Evans. Mr. Reid. Hm. Mr. Bowring. Mr. Mustoe. D. BP. Mr.… | ||
| scan0099 | Instructions on plugging rocker arm holes and subsequent engine testing procedures. | ||
| View original record | (3) Contd. The holes at the valve end of the rockers are to be plugged up with aluminium, 3/16" dia. and should be such that the plug approximately .300" long can be tapped in with a light hammer so… | ||
| scan0100 | Instruction sheet on fitting Lodge Detachable Sparking Plugs to the 40/50 HP 'New Phantom' chassis to address overoiling issues. | ||
| View original record | Hk: Paris. Ps. " Whr. India. Mr. Kirby,India. Pt. Australia. Mr. Reeves,Madrid. Rs. for Nice. Pk. Sales. H. " Sg. " CWB. " Br. 'N' Mr. Evans. Mr. Reid. Hm. Mr. Bovring. Mr. Mustoe. Mr. Walker. D.O.… | ||
| scan0101 | The comparison of 3 and 7 oil feeds to crankshaft bearings. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. 48980 EXPERIMENTAL REPORT. COPIES TO: RCJ BJ WOR By. E. Da. EN OY RG Expl. No. REF. HS4/LG7.12.25. OBJECT OF TEST. Comparison of 3 and 7 oil feeds to… | ||
| scan0102 | New Phantom engine experiments comparing 7 and 3 direct oil feeds. | ||
| View original record | R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: Hs/ACL/LG7.12.25. NEW PHANTOM EXPERIMENTS. WITH 7 AND 3 DIRECT OIL FEEDS. We have carried out several experiments with… | ||
| scan0103 | Oil consumption and discharge through engine bearings, comparing different oil feed configurations. | ||
| View original record | R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF: Hs/ACL/LG7.12.25 [GRAPH] Graph Title: OIL CONSUMPTION & DISCHARGE THROUGH BEARINGS WITH 7 & 3 FEEDS ON NEW ENGINE Oil… | ||
| scan0104 | Page with a graph showing oil consumption and discharge versus engine RPM for different bearing feeds. | ||
| View original record | R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF. HS/ACL/LG7.12.25. seven bearing feeds. The reduction was also noticed to be proportionately greater at the high… | ||
| scan0105 | Investigating oil pressure differences between direct and indirect supply engine bearings. | ||
| View original record | R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. -4- Expl. No. REF HS/ACL/LG7.12.25 obtained for the previous engine tested. The oil pressure and temperature of oil supply to the… | ||
| scan0106 | Analyzing oil pressure in relation to engine speed for various main bearings. | ||
| View original record | R.R. 498A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. -5- Expl. No. REF: Hs/ACL/LG7.12.25. OIL PRESSURE AT INTERMEDIATE BRGS WITH DIRECT FEED TO 3 MAIN BRGS. ONLY. [2.EACII] Graph Labels:… | ||
| scan0107 | Oil pressure and consumption related to engine bearing clearances, including a graph of oil pressure versus RPM. | ||
| View original record | H.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. -6- Expl. No. REF: Hs/ACL/LG7.12.25. Graph Title: CALCULATED OIL PRESS AT BIG ENDS DUE TO CENTRIFUGAL FORCE Graph Y-Axis: OIL PRESS.… | ||
| scan0108 | With a graph detailing oil consumption tests on the 40/50 HP Silver Ghost and Phantom engines. | ||
| View original record | R.R. 493a (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. -7- Expl. No. REF Hs/ACL/LG7.12.25. [Graph Title] 40/50 HP. OIL CONSUMPTION AT CONSTANT SPEED OF 2000 R.P.M. FOR VARYING OIL FLOW… | ||
| scan0109 | Oil consumption and oil temperature rise in relation to engine speed. | ||
| View original record | R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. -8- Expl. No. REF: Hs/ACL/LG7.12.25. 4½ pts/min. The consumption at an average speed of 35 m.p.h. worked out at 509 m.p.g. for the… | ||
| scan0110 | Page discussing the temperature rise of oil flow through engine bearings. | ||
| View original record | R.R. 493a (50 H) (D.D. 31. 12-6-25) J.H.D. EXPERIMENTAL REPORT. -9- Expl. No. REF HS/ACL/LG7.12. 25. entirely due to the passage of oil through the bearings because a certain amount of heat can be… | ||
| scan0111 | Oiling tests for the Phantom model. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Handwritten: +8980 COPIES TO: R.CJ BJ WOR By E Da EF. RG OY Expl. No. 8980 (Handwritten above: 8040) REF. Hs3/LG15.12.25 OBJECT OF TEST.… | ||
| scan0112 | Oil feed experiments on the Phantom and oil consumption tests on the Silver Ghost. | ||
| View original record | R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF:Hs/ACL/LG151225 FURTHER EXPERIMENTS WITH 3 OIL FEEDS ON PHANTOM AND TESTS ON SILVER GHOST. Reviewing the question of… | ||
| scan0113 | With graphs showing Silver Ghost oil consumption versus oil pressure and oil flow from road tests. | ||
| View original record | R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF: HS/ACL/LG151225 [Graph 1] Title: OIL CONSUMPTION ON SILVER GHOST WITH VARIOUS OIL PRESSURES. RESULTS FROM ROAD TESTS.… | ||
| scan0114 | Comparing oil consumption and leakage with seven versus three oil feeds for main bearings on Phantom and Silver Ghost cars. | ||
| View original record | R.R. 493A (50 H) (D.D. 21. 12-6-25) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF: Hs/ACL/LG151225 Furthermore the results we have obtained from two cars on test, a Phantom and a Silver Ghost, show… | ||
| scan0115 | Oil discharge in a Phantom engine, comparing results with and without grooves in the intermediate bearings. | ||
| View original record | R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. -4- Expl. No. REF Hs/ACL/LG151225 [Graph showing Oil Discharge in Pts/Min vs R.P.M.] GRAPH TITLE: OIL DISCHARGE ON PHANTOM WITH 3 MAIN… | ||
| scan0116 | Summarizing the factors controlling oil consumption and their relative importance. | ||
| View original record | R.R. 493a (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. -5- Expl. No. REF: Hs/ACL/LG1512125 SUMMARY OF FACTORS CONTROLLING OIL CONSUMPTION AND THEIR RELATIVE IMPORTANCE. During our… | ||
| scan0117 | Remedies for over-oiling engines, focusing on piston designs and lubrication modifications for the Phantom engine. | ||
| View original record | R.R. 498A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. -6- Expl. No. REF: Hs/ACL/LG151225 a badly overoiling engine has been effected by the use of 'L' section rings. The unfort-unate part is… | ||
| scan0118 | Letter acknowledging receipt of an Experimental Report regarding a comparison of oil feeds to crankshaft bearings. | ||
| View original record | ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. 48980 Oy3-E-122425 December 24, 1925. Mr. E. W. Hives, Rolls-Royce, Ltd., Derby, England. Dear Mr. Hives: We wish to acknowledge receipt of Experimental… | ||
| scan0119 | Front hub lubrication, discussing bearing failures due to a lack of lubrication on specific chassis. | ||
| View original record | XS980 BY14/H.29.12.25. FRONT HUB LUBRICATION. CHASSIS Nos:- 96-MC, 97-MC, 120-MC. 112-RC. 116-EM. With reference to the four bearings, No.350, three from Cricklewood, one from Paris, and one No.160,… | ||
| scan0120 | Front bearing lubrication issues, replacement policies, and customer refunds. | ||
| View original record | - 2 - BY14/H. 29.12.25. Apparently our anxiety to not over-lubricate the front bearing, to avoid complaints of ineffective front brakes, has resulted in insufficient lubricant being added. We would… | ||
| scan0121 | Change from grease to oil for front hub lubrication and requesting updated drawings. | ||
| View original record | BY. c. Hs. c. Mx. c. Hm. U. X8980 SFT9/EMM.31.12.25. FRONT HUB LUBRICATION. Memo. By14/H.29.12.25. I have made arrangements for the Works to start at once building up inner hubs with a good supply of… | ||
| scan0122 | Acknowledgement of receipt for Experimental Report No. 8980 regarding oiling tests on the Phantom. | ||
| View original record | ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. +8980 Oy3-E-1226 January 2, 1926. Mr. E. W. Hives, Rolls-Royce, Ltd., Derby, England. Dear Mr. Hives: This will acknowledge receipt of Experimental… | ||
| scan0123 | Procedure for measuring oil flow through the bearings on a Phantom engine. | ||
| View original record | X8980 To Hm. from Hs/ACL. Hs/ACL1/LG27.4.26. MEASUREMENT OF OIL FLOW THROUGH BEARINGS ON PHANTOM. X8980 X8090 The apparatus is connected up as shown in the sketch. This means that the following parts… | ||
| scan0124 | Continuation page of a data table showing performance metrics under different RPMs. | ||
| View original record | contd :- -2- R.P.M. Press: Temp: Pts/min. 1000 19 60 .700 1500 20.5 60 1.300 Hs/ACL. | ||
| scan0125 | The factors controlling overoiling in Phantom engines compared to Silver Ghost engines. | ||
| View original record | To R. from Hs/ACL. c. to BJ. RG. c. to E. DA. c. to BY. Wor. c. to EP. Hm. X8980 Hs/ACLL/LG4. 5. 26. FACTORS CONTROLLING OVEROILING ON X780 PHANTOM ENGINES. It is general experience that the Phantom… | ||
| scan0126 | Report with graphs analyzing engine oil consumption versus oil flow through bearings for Silver Ghost and Phantom models. | ||
| View original record | contd :- -2- consumed will be influenced by the amount supplied to the walls. The following curve supports this supposition and shews how the consumption of this particular Silver Ghost increases with… | ||
| scan0127 | Comparison of oil consumption versus oil pressure for Silver Ghost and Phantom models, attributing differences to bearing clearances. | ||
| View original record | contd :- -3- the one case. If however we plot these consumptions on an oil pressure base we immediately notice a marked difference between the two curves - as shown here. For the Silver Ghost a higher… | ||
| scan0128 | Comparison of oil flow between Silver Ghost and Phantom engines and methods for reducing it. | ||
| View original record | contd :e -4- feeds has proved to be a definite advantage when the initial oil flow is excessive. The average Silver Ghost with 20 to 25 lbs/sq.in. pressure at 1000 r.p.m. gives an oil flow of about… | ||
| scan0129 | Engine testing, oil flow, and the performance of different types of piston rings. | ||
| View original record | contd :- -5- This engine has been tested at full load 2750 r.p.m. on the test bench and ran perfectly well without any signs of insufficient oil to pistons. When shut down it was quite free to turn… | ||
| scan0130 | The causes of oil consumption and smoking exhaust, with a summary of findings from engine tests. | ||
| View original record | contd :- -6- oiling tendency and in the majority of cases they have been found to actually increase the consumption due to the increased suction past the baffles as the piston moves towards the top of… | ||
| scan0131 | High oil consumption on the Phantom engine, linking it to the fit of bearings and piston rings. | ||
| View original record | contd :- -7- to 3 pts/min. at 2500 r.p.m. This engine was fitted with piston rings similar to Silver Ghost - not 'L' shaped rings. Therefore in general we can say that high oil con- sumption on the… | ||
| scan0132 | Graph plotting oil flow through bearings against engine RPM for car 12.EX at a pressure of 17.5-27 lbs/sq in. | ||
| View original record | OIL FLOW THROUGH BEARINGS ON CAR. 12.EX PRESS 17.5 - 27 lbs/□'' OIL FLOW PTS/MIN 0 1 2 3 R.P.M. 500 1000 1500 2000 2500. acp. | ||
| scan0133 | Oil tests and instructions to address over-oiling in Phantom engines. | ||
| View original record | |||
| scan0134 | Oil flow measurements through bearings for car 67-TC and providing comparative test data. | ||
| View original record | To Mx. from Hs/ACL. X8980 Hs/ACL1/LG6. 7.26. RE. OIL FLOW THROUGH BEARINGS. X8000 The results of the oil flow measurements on your car 67-TC shew that there is a flow of 1.95 pts/min. at 1000 r.p.m.… | ||
| scan0135 | New, more convenient method for lubricating the off-side bearing of the clutch operating shaft. | ||
| View original record | To BY. from AJS. c. to BJ. Hs. +8980 AJS2/M16.7.26. EAC. CLUTCH OPERATING SHAFT LUBRICATOR. X.8300 X.8980 We send herewith LeC.2264 shewing a method of lubricating the off-side bearing of clutch… | ||
| scan0136 | Engine inspection for Chassis 115-MC, detailing issues with bearings and the crankshaft due to overoiling. | ||
| View original record | Hs [Strikethrough: Derby] copy "Hs" Derby. X8980 9-30 25/9/26 Ps9/JP/23/9/26 RE CHASSIS 115-MC (Overoiling) We have now taken the engine out of the frame and measured up the play in the big end… | ||
| scan0137 | Investigation into steering lubrication and its effect on reversibility, comparing the Phantom and Silver Ghost models. | ||
| View original record | To Hs. from R. c. to BJ. BY. 48980 R3/M26.11.26. STEERING. X. 8430 X. 8980 The designers at 'Camacha' have discussed the steering on the lines that perfect lubrication of the present Phantom oil… | ||
| scan0138 | Recommending a change in gear oil, standardizing 'Amber A' for axles and gearboxes on both 20 HP and Phantom models. | ||
| View original record | To BY. from Hs. c. to EP. c. to Mx. c. to Hm. Hs2/LG23.12.26. X5980 GEAR OIL. At the present time we recommend thick Amber 'B' gear oil for the 20 HP., whereas for the Phantom we recommend thin Amber… | ||
| scan0139 | Graph comparing the viscosities of various oils based on temperature versus efflux time. | ||
| View original record | COMPARISON OF VISCOSITIES Y-Axis: TEMP. °C Values: 80, 70, 60, 50, 40, 30, 20, 10, 0 X-Axis: TIME OF EFFLUX, SECS. Values: 0, 250, 500, 750, 1000, 1250, 1500, 1750, 2000 Curve Labels: CASTROL R… | ||
| scan0140 | Requesting a car with an over-oiling Phantom engine for a two-day test of a new corrective scheme. | ||
| View original record | To Hm. from Hs. c. to Wor. X8980 Hs3/LG8. 3. 28. X417 PHANTOM OVER-OILING. We have been testing out a scheme which we had hoped might prove more permanent and less expensive method of correcting… | ||
| scan0141 | Advantages of minimizing lubricating grooves in aero and car engines. | ||
| View original record | E. RG. Hs. BY. from R. +8980 R3/M23. 3. 28. AERO AND CAR ENGINES. X. 2176 LUBRICATING GROOVES. X. 8980 X. 8040 X. 3996. Now we know that engines can run better with much less oil grooves, will all… | ||
| scan0142 | Technical memorandum discussing engine over-oiling, related sparking plug trouble, and tests on various scraper rings. | ||
| View original record | To R. from HS/ACL. c. to E.J. Wor. c. to R.G. E. c. to B.Y. 48980 Hs/ACL/LG10.5.28. RR.F. - OVEROILING. X.2175 X.3996 X.3368 X.3980 The influence of the reduced oil leakage through the bearings, by… | ||
| scan0143 | Report page discussing engine oil pressure at idling speeds and the Curtiss oiling system. | ||
| View original record | contd :- -2- pressure, which was normally 100 lbs/sq.in., fell off rapidly as the engine was throttled down to idling speeds. At low idling speeds the pressure was between 30 and 40 lbs/sq.in. We… | ||
| scan0144 | Modifications to HP shock absorber valves and the lubrication of grooved springs for the Phantom I. | ||
| View original record | Sg. From Hs/Rm. c. R. Wor. c. to Rg. Da. c. to By. EP. c. to E. PN. v. to Hs. C. X8980 X. 8410 X. 8520 X. 8980 Hs/Rm3/AD19.11.29. Adoption of drilled H.P. shock absorber valves and lubrication of… | ||
| scan0145 | Secret internal memorandum discussing the progress of engine development, including crankcase patterns and cylinder block design. | ||
| View original record | X9000 To Hs. from E. S E C R E T. E. A. C. E2/MB.5.23. X.9770 X.9000 X.9050 Many thanks for your memo. Hs2/LG2.5.23. We are expecting Mr. Royce back at WW. on Wednesday evening next. The instructions… | ||
| scan0146 | Continued testing of a rubber mounting with a single point mounting on car 9-EX. | ||
| View original record | X9005 HSOBS To RHC. from Hs/Rm. Hs/Rm3/LG22.11.27. RUBBER MOUNTING WITH SINGLE POINT MOUNTING AT THE FRONT OF RUBBER BUSH. We wish to continue the test on these items on 9-EX (EAC.1.) This car is… | ||
| scan0147 | Requesting design details for the breather connections on the E.A.C. engine crankcase. | ||
| View original record | To BY. c. to Hs. X9000 BY/Shn3/DB.11.9.23. E.A.C. - CRANKCASE & BEARINGS - BREATHER. To complete the Crankcase & Bearings details, we should like you to ask W.W. if they have any design ready showing… | ||
| scan0148 | Secret memo discussing the merits of a disc crankshaft and its potential impact on engine design and performance. | ||
| View original record | To HS. from R. c. to UJ. RG. DA. E. BY. x9010 S E C R E T. R5/M8.5.24. E. A. C. & GOSHAWK. DISC CRANKSHAFT. X.4221 X.9010 It has occurred to me that owing to the increased weight of the disc… | ||
| scan0149 | Requesting an order for forgings for the 'Seagull' crankshaft X.3837, referencing drawing No.Lec.1633. | ||
| View original record | To BY. from E. c. to CJ. hs. X9010 E3/M12.10.22. "SEAGULL" CRANKSHAFT X.3837. X9010 We send you herewith drawing No.Lec.1633 shewing the above. We should be glad if you would order up the necessary… | ||
| scan0150 | 'Seagull' spring drive and slipper flywheel, sending a drawing and requesting a blueprint. | ||
| View original record | To BY. from E. c. to CJ. c. to Hs. X9020 E2/M16.1.23. "SEAGULL" SPRING DRIVE AND SLIPPER FLYWHEEL. X.9020. X.9300 We send herewith drawing No.LeC.1670 shewing the above. We should be glad to receive a… | ||
| scan0151 | The ratio of connecting rod length to crank radius for various engines like Condor, Goshawk, and Hawk. | ||
| View original record | X9030 To R. from E. S E C R E T. E1/M7.3.24. c. to CJ. RG. HS. E. A. C. RE. CONNECTING ROD LENGTH. X.9030. The following table shews the ratio of con. rod length to crank length of various of our own… | ||
| scan0152 | Extract concerning combined magneto & battery ignition systems, hydraulic relays, and modifications to connecting rods and pistons to prevent engine knock. | ||
| View original record | MADE AT INLEY [Handwritten: X9030] Extract from R1/M3.4.24. RE EAC, COMBINED MAGNETO & BATTERY IGNITION AUTOMATIC ADVANCE. (RR. HYDRAULIC RELAY). X.3949. X.2974. X.9030. In addition it is assumed that… | ||
| scan0153 | Comparison of vibration and connecting rod length between Goshawk I and Goshawk 11 engines. | ||
| View original record | -2- con. rods. It will be seen that all of the engines enumerated are still on the comparatively flat part of the curves. Goshawk 1. is said to be free of the vibration which occurs at very high… | ||
| scan0154 | Tests with longer connecting rods to address over-run vibrations in an EAC engine. | ||
| View original record | R.R. 493A (20H) (D.A. 652 20-3-24) J.B.D. Y9030 Expl. No. 9550 9030 REF: Hs2/LGS.5.24. EXPERIMENTAL REPORT. S E C R E T. To R. from Hs. c. to CJ. RG. c. to DA. E. c. to BY. WOR. EAC. ENGINE - OVER-RUN… | ||
| scan0155 | Testing lower compression pistons for the EAC car to reduce detonation and improve engine smoothness. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9040 4187 REF: Hs2/LG1.2.24. To R. from Hs. c. to CJ. RG. c. to E. DA. c. to BY. PN. c. to Wor. S E C R E T. PISTONS FOR EAC.… | ||
| scan0156 | Magneto, discussing its automatic advance and suitability for an engine. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H. D. -2- . EXPERIMENTAL REPORT. Expl. No. 9040 REF: HSS/LC1.S.S4. Magneto. This magneto is quite a well-made machine and it has an automatic advance suitable for… | ||
| scan0157 | Potential solutions for overrun vibration, including shaft thickness, flywheel weight, and piston weight. | ||
| View original record | To E. from R. c. to CJ. RG. DA. Hs. BY. X9040 R6/M29.2.24. OVERRUN VIBRATION. X.4604 X.9550 X.9040 The thicker shaft looks good and should push the period well up out of the way if what we think is… | ||
| scan0158 | With a diagram and notes on a combined magneto and battery ignition automatic advance system. | ||
| View original record | x9040 S E C R E T RL/M3.4.24. To E. from R. c. CJ. RG. c. HS. BY. Mr. Claremont. E. A. C. COMBINED MAGNETO & BATTERY IGNITION AUTOMATIC ADVANCE. (R.R. HYDRAULIC RELAY). X.3949. X.9780. X.9040. I have… | ||
| scan0159 | Explanation of a double-acting, symmetrical 5-piston valve arrangement with diagrams. | ||
| View original record | -2- As you will remember the central valve is in equilibrium and should take practically no force to move. It only needs to move .1 up and down to uncover inlet and exhaust ports. I found considerable… | ||
| scan0160 | Technical discussion on an automatic ignition advance mechanism, including design considerations for pistons, magnetos, and detonation. | ||
| View original record | (3) To keep all dirt out of the central valve there will be a fine gauze filter at the entrance. The piston unit, valve, and cyl. should easily come away for cleaning. Somewhere in the circuit of… | ||
| scan0161 | New simplified design for the 'Seagull' cylinder head and induction pipe and the plan to test it. | ||
| View original record | X9050 To Hs. & EY. from R. c. to CJ. BJ. c. to Wor. EP. R4/M27.12.22. "SEAGULL" CYLINDER HEAD & INDUCTION PIPE. X.9050 X.9070 Regarding the 'Seagull' cylinder head, and induction pipe, we are sending… | ||
| scan0162 | The 'SEAGULL' cylinder head and valve rocker gear. | ||
| View original record | To BY. from E. c. to CJ. Wor. Hs. X9050 E1/M10.1.23. "SEAGULL" CYLINDER HEAD & VALVE ROCKER GEAR. X.9050. X.9060. X.9090. We send you herewith drawings Nos. LeC.1663 and 1667 shewing the above. These… | ||
| scan0163 | Specifications for a rocker mechanism and valve push rods, including materials, dimensions and clearances. | ||
| View original record | contd:- -2- We want these to be accurately determined in Derby by means of a model. The tubes which carry the valve push rods through the head should be tried in monel metal with a view to avoiding… | ||
| scan0164 | Explaining the design choice of casting the 'Seagull' engine's cylinder block in two separate groups of three. | ||
| View original record | X9050 To BY. from E. c. to CJ. c. to Hs. E1/M27.1.23. "SEAGULL" CYLINDER BLOCK, CYLINDER HEAD GASKET, AND ALTERATION TO HEAD. X.9050. We send you herewith drawings Nos.LeC.1672 and 1673, shewing the… | ||
| scan0165 | Secret memo from E. to Hs. regarding engine development progress for the crankcase, cylinder blocks, and ancillaries. | ||
| View original record | To Hs. from E. S E C R E T. E. A. C. X9050 E2/M5.5.23. X.9770 X.9000 X.9050 Many thanks for your memo. Hs2/LG2.5.23. We are expecting Mr. Royce back at WW. on Wednesday evening next. The instructions… | ||
| scan0166 | Blueprints for an experimental cylinder head and valve guides. | ||
| View original record | To File. [struck through] c. to Hs. X9050 BY/SS1/DB.28.11.23. EAC.I - X.9050 - CYLINDER HEAD. In accordance with Mr Hives request, please receive herewith two blueprints of each of the following… | ||
| scan0167 | Design and drawings for the 'Seagull' cylinder head and valve rocker gear. | ||
| View original record | To BY. from E. c. to CJ. Wor. Hs. X9060 E1/MO.1.23. "SEAGULL" CYLINDER HEAD & VALVE ROCKER GEAR. X.9050. X.9060 X.9090 We send you herewith drawings Nos. LeC.1663 and 1667 shewing the above. These… | ||
| scan0168 | Technical memorandum detailing the design and arrangement of valve push rods and rocker mechanisms. | ||
| View original record | contd:- -2- We want these to be accurately determined in Derby by means of a model. The tubes which carry the valve push rods through the head should be tried in monel metal with a view to avoiding… | ||
| scan0169 | Modifications to the 'Seagull' valve rocker components and associated drawings. | ||
| View original record | To BY. from E. c. to CJ. Hs. X9060 E1/M1 8.1.23. "SEAGULL" VALVE ROCKER DETAILS, ETC. X.9060 We send herewith drawing No.LeC.1669 shewing the above. This drawing supercedes LeC.1658 & 1667 in respect… | ||
| scan0170 | Calculations for the 'Seagull' valve rocker exact lift, referencing drawing No.LeC.1671. | ||
| View original record | X.9060 To BY. from E. c. to CJ. c. to Hs. E1/M19.1.23. "SEAGULL" VALVE ROCKER. CALCULATIONS FOR EXACT LIFT. X.9090 X.9060 We send herewith drawing No.LeC.1671 shewing the above. E. | ||
| scan0171 | Engine's power curve, performance, and a specific issue with tappet adjustment. | ||
| View original record | X9060 To R. from Hs. c. to CJ. SECRET Hs2/LG29.9.23. E. A. C. X.9771 X.9060 X.9770 Attached herewith is a power curve showing the best power we have so far obtained from the above engine. This power… | ||
| scan0172 | Issues with sticking tappets, a proposed fix, and the need for stronger valve springs. | ||
| View original record | X. 9060 To R. from Hs. c. to CJ. c. to E. Hs9/LG8.10.23. E. A. C. ENGINE - SECRET. X. 9770 X. 9060 The sticking of the tappets has gradually got worse on this engine until we found on one cylinder,… | ||
| scan0173 | Secret memo detailing modifications to the EAC gearbox, engine support, and valve tappets for the power unit. | ||
| View original record | X9060 To BY. from R. HS. c. to CJ. BJ. S E C R E T. E. A. C. R4/M13.10.23. POWER UNIT - X.9770 X.9320 X.9060 We are arranging to modify the EAC. gearbox so that it can be attached to the engine unit.… | ||
| scan0174 | E.A.C. engine tappet modifications to resolve sticking issues and a comparison of three different carburettors. | ||
| View original record | X9060 To R. from Hs. c. to CJ. c. to E. S E C R E T. Hs1/LGH.3.10.23. E.A.C. ENGINE. X9770 (crossed out) X9060 Since we have modified the tappets so that they pull down on to a collar, we have had no… | ||
| scan0175 | Tests of an E.A. C-1 engine, discussing valve stretching and proposed modifications. | ||
| View original record | R.R. 493 (40 H) (8L 42 12-7-23). J.H., D. X9060 EXPERIMENTAL REPORT. COPIES TO: R.CJ. BJ. WOR. By. E. Da. EP. PN. OY. Expl. No. 9770 9060 REF. Hs5/LG26.11.23. OBJECT OF TEST. Tests on E. A. C-1… | ||
| scan0176 | The failure of umbrella valves on an E. A. C-1 engine after 250 hours of testing. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9770 9060 REF:Hs5/LG26 11.23. FAILURE OF UMBRELLA VALVES (E.70818) ON E. A. C-1 ENGINE. All the exhaust ^valves of this type… | ||
| scan0177 | Inadequate heat flow and E.A.C. valve spring breakages. | ||
| View original record | contd:- -2- These results seem to indicate that the path for the heat flow from the head to the valve seat is inadequate. E.A.C. VALVE SPRINGS. We have had three cases of breakage. In each case the… | ||
| scan0178 | Secret memorandum on the valve lift and valve springs for the EAC engine, with comparisons to other engines. | ||
| View original record | To R. from E. c. to CJ. HS. RG. S E C R E T. RE. E.A.C. VALVE LIFT AND VALVE SPRINGS. X. 9060 VALVE LIFT. The valve lift with which the EAC. engine is at present running is slightly less than pro rata… | ||
| scan0179 | Proposed changes to valve lift, valve springs, and the use of tubular push rods. | ||
| View original record | contd:- -2- sure there is no excess of weight on these parts, and to confirm that they are using the tubular instead of solid push rods. We should be glad to know if you approve of the proposed new… | ||
| scan0180 | Replacement of valve E.70319 with the flat-headed valve E.71163 for 132 sets of EAC.II chassis. | ||
| View original record | To Hs. X9060 BY/SS1/DB.4.1.2.23. RE X.9060 - VALVES - E.A.C. We have instructed Valve E.70319 for the 132 sets of EAC.II chassis. Do you consider we should replace this by the flat headed valve… | ||
| scan0181 | Secret internal memo requesting models of E.A.C. valve gear parts for inspection. | ||
| View original record | X9060 To Hs. from E. c. to CJ. S E C R E T. E2/M19.1.24 RE. E.A.C. VALVE GEAR PARTS. X.9090 X.9060 We should be glad if you could send us models of the moving parts of the EAC. valve gear namely,… | ||
| scan0182 | Secret memorandum discussing alternatives for valve springs to reduce stress and breakage. | ||
| View original record | X. 9060 To E. HS. } FROM R. RG. DA. } SECRET. R2/M25.1.24. c. to CJ. BJ. Wor. BY. E. A. C. VALVE SPRINGS. X.9060. I think it would be wise to at once permanently reduce the stress range in the main… | ||
| scan0183 | Page 2 of a report discussing the properties of steels. | ||
| View original record | contd:- -2- between smaller area of face and our large 40/50. The latter was adopted for the older steels that were very soft when hot. R. | ||
| scan0184 | Request to produce 100 valve forgings for the EAC engine using a special steel supplied by Messrs. Firths. | ||
| View original record | BMM c. Mr Shelton. c. Hs. c. RMG. 49060 BY6-P22.2.24. SPECIAL VALVE STEEL. EAC: ENGINE. Would you kindly arrange to produce 100 valve forgings suitable for EAC, in the special material supplied by… | ||
| scan0185 | Technical drawing of an E.A.C. valve with key dimensions and specifications. | ||
| View original record | E.A.C VALVE X9060 May. 1924. MAX LIFT .4875 WITH .005" TAPPET CLE. 1.750 DIA. 45° FREE AREA 2.156.☐' | ||
| scan0186 | Valve lift curves with lower lift, sending associated drawings and specifying new dimensions. | ||
| View original record | To BY. from E. c. to CJ. HS. S E C R E T. X9060 E1/M6. 6. 24. E+ A. C. VALVE LIFT CURVES WITH LOWER LIFT. X.9090 X.9060 We send you herewith drawings Nos.Lec.1880. 1881 and 1882 dealing with the… | ||
| scan0187 | Tests with lower lift cams on an E.A.C. engine. | ||
| View original record | R.R. 403 (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. {see X9090 for prints} COPIES TO: RCJ BJ. WOR By. E. Da. EP. PN OY. RG Expl. No. X9060 REF. Hs4/LG19.9.24. OBJECT OF TEST. TESTS WITH… | ||
| scan0188 | The results of tests with a low lift camshaft on an EAC engine. | ||
| View original record | R.E. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. REF:- GHF/LG/17.9.24. RESULTS OF TESTS WITH 118° LOW LIFT CAMSHAFT ON EAC. ENGINE. NO.1-EAC-11. Conditions :- 1.500" longer… | ||
| scan0189 | Oscilloscope observations of valve bounce on Engine 1-EAC-11 with a high lift camshaft at various speeds. | ||
| View original record | Hs/GHF/LG19.9.24. VALVE BOUNCE - 'OSCILLOSCOPE'. Engine 1-EAC-11 - with high lift Camshaft. SPEEDS. 2500 Inlets and exhausts follow cam. 2570 Inlets just starting to bounce on closing Exhausts valves… | ||
| scan0190 | Test results for valve bounce on engine 1-EAC-11 with a low lift camshaft at various speeds. | ||
| View original record | -3- VALVE BOUNCE. Engine 1-EAC-11 - with low lift Camshaft. SPEEDS. 2750 Exhaust valves perfectly steady. Inlets leave the cam on opening for approx. .150" as if functioning as an automatic valve.… | ||
| scan0191 | Telegram regarding car parts for a Silver Ghost and potential issues after repairs. | ||
| View original record | Bring Car or parts of any useful interest stop silver ghost valves expect occasionally light stem after repairs Royce | ||
| scan0192 | New pattern for the 'Seagull' cylinder head and induction pipe. | ||
| View original record | To Hs. & BY. from R. c. to CJ. BJ. c. to Wor. EP. X9070 R4/M27.12.22. "SEAGULL" CYLINDER HEAD & INDUCTION PIPE. X.9050 X.9070 Regarding the 'Seagull' cylinder head, and induction pipe, we are sending… | ||
| scan0193 | Test bench experiments with a Marmon engine for induction pipe development and its subsequent failure. | ||
| View original record | X9070 To R. from Hs. c. to CJ. c. to E. SECRET Hsl/LG15.3.23. MARMON ENGINE. X1692 X9070 We have been running the Marmon engine on the test bench with the object of using this engine to carry out… | ||
| scan0194 | Continued report on engine testing, discussing the disappointing B.M.E.P. of a Marmon engine compared to a Goshawk-11. | ||
| View original record | contd:- -2- We shall be able to get the engine running again without much difficulty and shall continue the tests. The B.M.E.P. of the Marmon is rather dis- appointing - the peak of the curve is… | ||
| scan0195 | Fuel/air distribution experiments conducted on a Marmon engine. | ||
| View original record | REPORT. MARMON ENGINE. DISTRIBUTION EXPERIMENTS. Marmon pipe. 6 5 4 3 2 1 DIA = 1.700" HEATER CARBURETTOR With Stromburg carburetter. Distribution fairly good at low speeds but cylinders 1 and 6 were… | ||
| scan0196 | Non-homogeneous fuel mixture supply and surging in the intake manifold. | ||
| View original record | contd:- -2- Cylinders 6, 5 and 4 were richer than 3, 2 and 1 owing to the position of the carburetter - as shown in sketch. Carburetter was reversed and cylinders 3, 2 and 1 were then richer than 6, 5… | ||
| scan0197 | E.A, C-1 engine investigation regarding the boiler draining scheme. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. x9070 EXPERIMENTAL REPORT. COPIES TO: R.CJ. BJ. WOR. By. E. Da. EP. PN. OY. Expl. No. 9770 9070 REF. Hs1/LG16.11.23. OBJECT OF TEST. E. A, C-1 ENGINE… | ||
| scan0198 | Tests of the R.A.C-1 induction system and hot-spot on a 40/50 HP engine. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. Expl. No. REF: RR/AG11/1.014.11 EXPERIMENTAL REPORT. REPORT ON THE R.A.C-1 INDUCTION SYSTEM AND EXPERIMENTS ON THE HOT-SPOT. The tests were carried out with… | ||
| scan0199 | Petrol consumption, distribution, and performance of the standard R.A.C. hot-spot induction system. | ||
| View original record | R.E. 493A (40 H) (EL 42 12-7-23). J.H., D. -2- Expl. No. REF: Hs/AGL1/L(16)123 EXPERIMENTAL REPORT. (1) DISTRIBUTION. From consideration of the petrol consumption and power output at low speeds with… | ||
| scan0200 | Comparing the performance of different induction system hot-spots, including cast iron and aluminum variants. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. -3- EXPERIMENTAL REPORT. Exptl. No. REF: Hm/ACLL/LG1611.23 supplied if the mixture is strong and the hot spot is not at its maximum running temperature. If… | ||
| scan0201 | Comparing the efficiency of aluminium versus cast iron hot spots for fuel evaporation. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. REF: Hs/ACL1/LO161123 under the same conditions gave only .2 pts/hr. By increasing the heat supply to the aluminium no… | ||
| scan0202 | Carburetter and induction system modifications, seeking confirmation on the heating system for the elbow and boilers. | ||
| View original record | To HS. from E. c. to CJ. X9070 S E C R E T. E3/M19.1.24. X.9080 X.9070 RE. EAC. CARBURETTER AND INDUCTION SYSTEM. The above has been completed in accordance with the programme originally intended,… | ||
| scan0203 | Secret memo detailing engine design considerations from a meeting at Le Canadel. | ||
| View original record | 49070 To E. & DA. FROM R. c. to CJ. BJ. RG. WOR. BY. HS. PN. S E C R E T. R4/M22:3.24. E. A. C. ENGINE - X.9770 MEETING AT LE CANADEL - (RC. HS. & R.) CAM & VALVE TIMING. X.9090. It was considered and… | ||
| scan0204 | Carburetter for the E.A.C. engine. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. X9080 EXPERIMENTAL REPORT. COPIES TO: R.CJ. BJ. WOR. By. E. Da. EP. PN. OY. Expl. No. 9080 REF. Hs1/LG2.10.23. OBJECT OF TEST. Carburetter for E.A.C. engine.… | ||
| scan0205 | Summarising observations on the performance of the E.A.C. Carburetter. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9080 REF: Hs1/LG2.10.23. E.A.C. CARBURETTER. The following is a summary of our observations on the E.A.C. Carburetter up to… | ||
| scan0206 | Completion of the carburetter and induction system, seeking confirmation on related heating system alterations. | ||
| View original record | 19080 To HS. from E. c. to CJ. S E C R E T. E3/M19.1.24. X.9080 X.9070 RE. EAC. CARBURETTER AND INDUCTION SYSTEM. The above has been completed in accordance with the programme originally intended,… | ||
| scan0207 | Print of the Knave carburetter for the E.A.C. engine. | ||
| View original record | X9080 To E. from Hs. Hs2/T5.12.23. RE CARBURETTER. Attached herewith is a print of the Knave carburetter. We have not used the second extra air valve. We consider for the E.A.C. engine it would… | ||
| scan0208 | 'whistling' noise in the carburetter at low speeds. | ||
| View original record | Expl: Report. Expl: No. 9080 Hs1/LG2.10.23. height of the jet proper and keeping the diffuser fired. Noise in Carburetter. At low speeds with small lift of the air valve the air velocity gives rise to… | ||
| scan0209 | Improvements to the exhaust, silencer, and cutout system for the E.A.C. engine. | ||
| View original record | To E. HS. FROM R. X9080 SECRET. R2/M14.3.24. E.A.C. ENGINE. X.9490 X.9080 X.9230 It is quite evident we must have a better exhaust, silencer, and cutout system, especially for the early EACs. I have… | ||
| scan0210 | Meeting memorandum discussing engine design for cam timing, induction, exhaust, and detonation. | ||
| View original record | X9080 To E. & DA. FROM R. c. to CJ. BJ. RG. WOR. BY. HS. PN. S E C R E T. E. A. C. R4/M22.3.24. ENGINE - X.9770 MEETING AT LE CANADEL - (RG. HS. & R.) CAM & VALVE TIMING. X.9090. It was considered and… | ||
| scan0211 | Testing a fixed choke type carburetter with a vaporiser. | ||
| View original record | X9080 R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. COPIES TO: R.CJ. BJ. WOR. By. E. Da. EP. PN. OY. Expl. No. 9080 REF. Hs3/LG29.5.24. OBJECT OF TEST. To test fixed choke type… | ||
| scan0212 | Preliminary tests of an EAC fixed choke type carburetter. | ||
| View original record | R.E. 493a (20H) (D.A. 652 20-3-24) J.E.D. EXPERIMENTAL REPORT. Expl. No. 9080 REF: HS/ACL/LG29.5.24. PRELIMINARY TESTS ON EAC. FIXED CHOKE TYPE CARBURETTER. This carburetter was tested on the EAC.… | ||
| scan0213 | Continuation of a report on experiments with a Knave carburetter, needle valves, and vaporiser. | ||
| View original record | contd:- -2- taken with a Knave carburetter. The mixture was adjusted for each test. We are continuing our experiments with needle valves having deeper grooves also with heat supply to vaporiser.… | ||
| scan0214 | Comparing an E.A.C. fixed choke carburetter against a Knave type, including a diagram of an alteration to the deflector on the air valve. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9080 REF: 29.5.24. E.A.C. FIXED CHOKE TYPE CARBURETTER. R.P.M. | E.A.C. B.HP. | Knave. B.HP. 2000 | 90 | 96 1500 | 72 | 78… | ||
| scan0215 | Requesting a report on a series of checks for an EAC Carburetter on vehicle 93-NK. | ||
| View original record | 49080 GWH. from Hs. Hs/LG13.10.24. EAC. CARB. Please check over the following points carefully on EAC. Carburetter on 93-NK, and send in a report :- (1) Will the engine run slow enough light and under… | ||
| scan0216 | The 'Seagull' engine camshaft, bearings, and oil pump drive, referencing drawing No. LeC.1660. | ||
| View original record | To BY. from E. c. to CJ. Wor. Hs. X9090 E4/M22.12.22. "SEAGULL" ENGINE CAMSHAFT & BEARINGS ' & OIL PUMP DRIVE. X.9090 X.9160 We send you herewith drawing No.LeC.1660 shewing the above. It is intended… | ||
| scan0217 | Design of the 'Seagull' cylinder head and valve rocker gear. | ||
| View original record | To BY. from E. c. to CJ. Wor. Hs. X9090 E1/M10.1.23. "SEAGULL" CYLINDER HEAD & VALVE ROCKER GEAR. X.9050. X.9060 X.9090 We send you herewith drawings Nos. LeC.1663 and 1667 shewing the above. These… | ||
| scan0218 | Design notes regarding the valve push rods and rocker mechanism for an engine. | ||
| View original record | contd:- -2- We want these to be accurately determined in Derby by means of a model. The tubes which carry the valve push rods through the head should be tried in monel metal with a view to avoiding… | ||
| scan0219 | Modifications and specifications for the 'Seagull' valve rocker details. | ||
| View original record | To BY. from E. c. to CJ. Hs. X. 9090. E1/M18.1.23. "SEAGULL" VALVE ROCKER DETAILS ETC. X. 9090 We send herewith drawing No. LeC.1669 shewing the above. This drawing supercedes LeC.1658 and 1667 in… | ||
| scan0220 | Calculations for the exact lift of a Seagull Valve Rocker. | ||
| View original record | To BY. from E. c. to CJ. c. to Hs. X.9090. El/M19.1.23. SEAGULL VALVE ROCKER. CALCULATIONS FOR EXACT LIFT. X.9090. X9060 We send you herewith drawing No. LeC.1671, shewing the above. E. | ||
| scan0221 | The E.A.C.1 engine, comparing camshafts and investigating fuel distribution issues. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. To R. from Hs c. to CJ. c. to E. SECRET. E. A. C.1 ENGINE. Expl. No. [REDACTED] REF: Hs/L629.29.10.23. Handwritten notes: X9090 X9770… | ||
| scan0222 | Performance graph showing power output and fuel consumption for an E.A.C. engine with a Knave carburetter. | ||
| View original record | E.A.C. POWER OUTPUT & CONSUMPTION WITH KNAVE CARBURETTER. (PET CON BY DIRECT MEASUREMENT). BAR = 754 M/M. PETROL. SHELL MEX. AIR TEMP = VALVE TIMING 110° CAMSHAFT .010" TAPPET CLES. DIAGRAM LABELS:… | ||
| scan0223 | Secret internal memo requesting models of E.A.C. valve gear parts for inspection and querying the type of push rods used in tests. | ||
| View original record | x9090 To Hs. from E. C. to CJ. S E C R E T. E2/M19.1.24. RE. E.A.C. VALVE GEAR PARTS. X.9090 X.9060 We should be glad if you could send us models of the moving parts of the EAC. valve gear namely,… | ||
| scan0224 | Meeting notes on engine development, covering cam timing, carburetters, exhaust systems, and detonation issues. | ||
| View original record | X9090 To E. & DA. FROM R. c. to CJ. BJ. RG. WOR. BY. HS. PN. S E C R E T. E. A. C. ENGINE - X.9770 MEETING AT LE CANADEL - (RG. HS. & R.) CAM & VALVE TIMING. X.9090. It was considered and agreed that… | ||
| scan0225 | Drawings for valve lift curves with lower lift, detailing new dimensions for cam and valve lift. | ||
| View original record | To BY. from E. c. to CJ. HS. X9090 S E C R E T. E1/M6.6.24. E+ A. C. VALVE LIFT CURVES WITH LOWER LIFT. X. 9090 X. 9060 We send you herewith drawings Nos.LeC.1880. 1881 and 1882 dealing with the… | ||
| scan0226 | Tests with lower lift cams. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. COPIES TO: RCJ BJ. WOR By E. Da. EF. RN. OV. RS Expl. No. 49090 REF. HS4/LG1 9.9.24. OBJECT OF TEST. TESTS WITH LOWER LIFT CAMS. TESTER.… | ||
| scan0227 | The results of tests with a low lift camshaft on an EAC engine. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. REF HS/GHP/LG17.9.24. RESULTS OF TESTS WITH 118° LOW LIFT CAMSHAFT ON EAC. ENGINE. NO. 1-EAC-11. Conditions :- 1.500" longer… | ||
| scan0228 | Oscilloscope test results for valve bounce on Engine 1-EAC-11 with a high lift camshaft at various speeds. | ||
| View original record | Hs/GHF/LG19.9.24. VALVE BOUNCE - 'OSCILLOSCOPE'. Engine 1-EAC-11 - with high lift Camshaft. SPEEDS. 2500 Inlets and exhausts follow cam. 2570 Inlets just starting to bounce on closing Exhausts valves… | ||
| scan0229 | Valve bounce characteristics of engine 1-EAC-11 with a low lift camshaft at various speeds. | ||
| View original record | -3- VALVE BOUNCE. Engine 1-EAC-11 - with low lift Camshaft. SPEEDS. 2750 Exhaust valves perfectly steady. Inlets leave the cam on opening for approx. .150" as if functioning as an automatic valve.… | ||
| scan0230 | Graph comparing the power curves of two different camshafts (High Lift vs Low Lift) on an E.A.C. engine. | ||
| View original record | E.A.C. ENGINE POWER CURVES OF 2 CAMSHAFTS TAKEN UNDER IDENTICAL CONDITIONS. E.A.C. CARB. C.Q. OPEN. MEAN DIFFERENCE BETWEEN CAMSHAFTS. 1.8% HIGH LIFT LOW LIFT REVS./MIN. | ||
| scan0231 | Graph comparing high and low lift profiles for EAC Inlet and Exhaust Camshafts. | ||
| View original record | E.A.C. CAMSHAFTS INLET CAMS HIGH LIFT .482" LOW LIFT .413" LIFT IN THOUSANDTHS OF AN INCH 400 300 200 100 0 TDC 25° 50° 75° 100° 125° 150° 175° 200° 225° 250° CRANKSHAFT DEGREES EXHAUST CAMS HIGH LIFT… | ||
| scan0232 | Adoption of a low lift cam over a high lift cam and the feasibility of modifying existing parts. | ||
| View original record | U. Sft. c. Hs. ----- X. 9090 ? BY19/H. 15.12.24. ------------------ The Experimental Dept. are very anxious to adopt the low lift cam in place of the high lift which was at first considered the most… | ||
| scan0233 | Front floorboards blowing up on an experimental E.A.C. car at speed. | ||
| View original record | 49500 PN6/DN/2.4.24. TO Hs. FROM P.N. The experimental E.A.C. car which I had with me in France, on sundry occasions was nearly in difficulties owing to the front floorboards blowing up when driving… | ||
| scan0234 | Inquiry regarding the failure of fittings used to secure the front floorboards on an experimental car. | ||
| View original record | X9500 PN2/DN/27.3.24. TO Hs. FROM P.N. Will you please ascertain from your Mechanic - Mr. Lauro - what sort of fittings were provided to hold the front floorboards down on the Experimental car, and… | ||
| scan0235 | Clarifying that the floorboards which blew up on an experimental car were arranged by the coachbuilder, not by R.R. design. | ||
| View original record | 49500 To PN. from Hs. S E C R E T.Hs6/T7.4.24. E. A. C. RE FLOORBOARDS. The floorboards of the experimental E.A.C. car which blew up when driving were boards which were arranged by the coachbuilder,… | ||
| scan0236 | Proposed dimensions for a bonnet, radiator, and dash for model EAC.2, and requesting a mock-up. | ||
| View original record | 49500 (handwritten and struck through) To BY. from DA/EV. c. to CJ. HS. S E C R E T. DA/EV2/M7. 8. 24. E. A. C. 2. X.9250 X.9260 X.9500 We send herewith N.scj.1828., shewing the proposed dimensions of… | ||
| scan0237 | Proposed scheme for stiffening the scuttle armature on various car models. | ||
| View original record | To BY. from DA/EV. c/c to BJ. Hs. +9500 EV2/15.7.26. RE. JELLYING SCUTTLES. X.7500 X.8500 X.9500 We send herewith N.sc.2233 shewing the proposed scheme of stiffening the scuttle armature at the… | ||
| scan0238 | Modifications to the 40/50 chassis shock absorbers and frame. | ||
| View original record | X9520 To BY. HS. } FROM DA/EV. S E C R E T. DA/EV1/M21.6.24. E. A. C. RE. 40/50 CHASSIS SHOCK ABSORBERS. X.9520. X.3461. We thank you for your BY/C3/H24.5.24., and the enclosed modified chassis print… | ||
| scan0239 | Fitting and modification of hydraulic shock dampers on the rear of a vehicle. | ||
| View original record | To BY. from DA. c. to BJ. Hs. *X9520 DA4/M6. 7. 26. EAC.1. HYDRAULIC SHOCK DAMPERS ON REAR. X.8920 X.235 X.9520 We have looked into the question of fitting hydraulic shock dampers to the rear of the… | ||
| scan0240 | Adaptation of a forward support bracket for hydraulic shock dampers. | ||
| View original record | To BY. from DA. c. to BJ. Hs. X9520 DA2/M16.7.26. EAC.1. HYDRAULIC SHOCK DAMPERS ON REAR. X.9520 X.235 With reference to BY/CGH11/G12.5.26., we enclose N.sch.2235 shewing a slight adaption of the… | ||
| scan0241 | Secret memo detailing a proposal for magneto ignition wiring to minimize chassis alteration. | ||
| View original record | X9560 To BY. from E. c. to CJ. c. to Hs. E1/M25.2.24. S E C R E T EAC.III. MAGNETO IGNITION WIRING. X.9560. We send you herewith a blue print of LeC.1838., shewing a proposal we have sent to Mr. Royce… | ||
| scan0242 | Secret memorandum discussing an arrangement for Magneto Wiring. | ||
| View original record | X.9560. To E. from R. c. to CM. RG. DA. Hs. Da. S E C R E T EAC. III MAGNETO WIRING. X.9560. I think the arrangement you have made is good, and if it is the coolest and neatest possible, I should get… | ||
| scan0243 | Modifications to wiring and fittings to accommodate the new position of the dynamo on the engine. | ||
| View original record | X9560 BY/HSB7/W.14/3/24. To SEC. c. to SEV C. to Mr.Wotherspoon(Sitt. Dept?) c. to EPC. X.9560. E.A.C.III. WIRING & FITTINGS -SEC:7360. MODIFICATIONS TO SUIT NEW POSITION OF DYNAMO ON ENGINE.… | ||
| scan0244 | Secret memo detailing electrical equipment faults on 40/50 cars at Chateauroux. | ||
| View original record | To HY. from EFC. c. BY/RD. SECRET x 9560 EFC3/T25.6.24. E.A.C. RE ELECTRICAL EQUIPMENT ON 40/50 CARS AT CHATEAUROUX. x9960 x9560 Would you kindly note the following extracts from a report of my… | ||
| scan0245 | Query regarding Rapson tyre dimensions to check for clearance with the wings and potential damage to an electric cable. | ||
| View original record | Hs/CWH. from EFC. X.9560 EFC1/T28.6.24. X.9650 - E.A.C. WIRING. Would you kindly let me know the outline dimensions of Rapson tyres, from the point of view of clearances with the wings, as the D.O.… | ||