Rolls-Royce Archives
| Identifier | Entry | ||
| scan0001 | New vacuum tank design suitable for the new dashboard. | ||
| View original record | To BY. from DA. C. CJ. Hs. X7510 DA5/M8.1.26. EAC. 8. VACUUM TANK. X.4400 X.7510 X.7500 We send herewith N.sch.2108 shewing the vacuum tank suitable for the new dashboard. It will be noticed that it… | ||
| scan0002 | Carburetter starvation caused by petrol boiling in the Autovac on a Phantom chassis. | ||
| View original record | To R. from Hs/AJL. c. to BJ. Wor. c. to E. DA. c. to BY. OY. X7510 Hs/AJL1/LG14.6.27. AUTOVAC PETROL FEED - PHANTOM. X3579 We have experienced carburetter starvation on EAC.V1ll chassis (12-EX) which… | ||
| scan0003 | Tests concerning petrol starvation due to exhaust manifold heat, listing five possible solutions. | ||
| View original record | contd :- -2- starvation first becomes apparent at 62°C. Tests were repeated using an aluminium and asbestos [struck through] covering on the side of the autovac nearest the exhaust manifold, the… | ||
| scan0004 | Positioning of the Autovac system in relation to the exhaust. | ||
| View original record | E. Hs. from R. BY. c. to BJ. Wor. RG. X7510 R7/M21.1.28. EAC.10 AUTOVAC POSITION. X.7510 X.3579 X.7080 I fear we must move this to the higher position suggested by E., but one does not like to place… | ||
| scan0005 | Tests of the petrol suction pump on the 'SS' engine when coupled to a standard autovac. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to E. DA. c. to BY. 17510 Hs/ACL1/LG3.9.28. 'SS' ENGINE. 17510 V3577 We have carried out some tests with the petrol suction pump on the 'SS' engine and obtained… | ||
| scan0006 | Analysis of pump operation, piston stroke, and port arrangement in relation to suction pressure and autovac delivery. | ||
| View original record | contd :- -2- The pump - see LeC. 2470 and 2478 - has a stroke of .800" and we find the suction and outlet ports are separated by .600". When the piston port is in registration with the suction port… | ||
| scan0007 | Pump efficiency, suction readings, and lubrication improvements for the ignition governor and dynamo drive bush. | ||
| View original record | contd :- -3- looked, as it seems to us that this has the effect of reducing the effective stroke of the pump. We think the efficiency of the pump would be increased if the ports were arranged so that… | ||
| scan0008 | Schematic diagram showing the operation of an S.S. Vacuum Pump. | ||
| View original record | S.S. VACUUM PUMP. PISTON AT BOTTOM OF STROKE AIR ENTERING OUTLET PORT INTO CYL DUE TO PRESSURE DROP DURING LATTER .200 PISTON TRAVEL SUCTION PORT AT BOTTOM OF STROKE PISTON UNCOVERS TOP PORT - PISTON… | ||
| scan0009 | Performance graph for a Vacuum Pump on a Super Sports Engine, plotting petrol delivery and suction against engine RPM. | ||
| View original record | VACUUM PUMP. (SUPER SPORTS ENGINE). ENGINE No SS-3. BORE = 1.125" STROKE = .800" PUMP RUNS AT HALF SPEED OF ENGINE. PETROL DELIVERY (PINTS PER HOUR) R.P.M. OF ENGINE. SUCTION OF PUMP. (INCHES OF… | ||
| scan0010 | Wire confirmation detailing modifications to a vacuum pump piston and cylinder for retesting. | ||
| View original record | CONFIRMATION OF WIRE. X7510 WW. 5. 9. 28. HIVES. ROYCAR. DERBY. SS. VACUUM PUMP ADD PIECE POINT TWO THICK TO PISTON TOP RECUT SUCTION PORT ON EXISTING CYLINDER POINT TWO LOWER RETEST. ELLIOTT. | ||
| scan0011 | Modifications to the petrol vacuum pump, tappet rocker shaft lubrication, and valve timing for the 'SS' engine. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to E. DA. c. to BY. X7510 Hs/ACLL/LCS.9.28. RR. 'SS' ENGINE. PETROL VACUUM PUMP AND TAPPET ROCKER SHAFT LUBRICATION. We have modified the vacuum pump as suggested… | ||
| scan0012 | Long duration timing and oil consumption tests being conducted on the Phantom engine. | ||
| View original record | contd :- -2- long duration timing wetested on the Phantom and propose testing this while the correct camshaft is being produced. At the moment we have some bearing oil flow and oil consumption tests… | ||
| scan0013 | Blueprint detailing modifications to a vacuum pump for a Super Sports Engine. | ||
| View original record | V413. ALUMINIUM WASHER .187 THICK UNDER CYLINDER CAP TO KEEP COMPRESSION RATIO APPROX. SAME. BRASS DISC .200 THICK SWEATED TO PISTON TOP TO PREVENT PRESSURE PORT BEING UNCOVERED WHEN PISTON IS AT… | ||
| scan0014 | Performance curve graph for a modified vacuum pump on a Super Sports Engine. | ||
| View original record | V414 7-9-28 VACUUM PUMP (SUPER SPORTS ENGINE). DELIVERY CURVE OF PUMP AFTER MODIFICATION TO V413. DELIVERY (PINTS PER HOUR). R.P.M. OF ENGINE. FUEL DELIVERY BY PUMP THRO' STANDARD AUTO-VAC. FUEL… | ||
| scan0015 | New dashboard arrangement to maximize the height of the autovac tank. | ||
| View original record | BY. from DA. c. to BJ. Hs. 4510 DA2/11.11.28. 'SS' DASHBOARD ETC. X.7500 X.7510 Herewith we send N.sch.2755 shewing how we suggest the dashboard should be arranged to obtain the max. height of the… | ||
| scan0016 | Successful temporary modifications to the 'SS' vacuum pump. | ||
| View original record | X7510 To BY. from Hs. c. to Wor. Hs12/LG12.11.28. 'SS' VACUUM PUMP. Certain temporary modifications were made to the fuel feed vacuum pump upon instructions from WW. and were successful in overcoming… | ||
| scan0017 | Blueprint detailing modifications to a vacuum pump for a Super Sports Engine. | ||
| View original record | V413. ALUMINIUM WASHER .187 THICK UNDER CYLINDER CAP TO KEEP COMPRESSION RATIO APPROX. SAME. BRASS DISC .200 THICK SWEATED TO PISTON TOP TO PREVENT PRESSURE PORT BEING UNCOVERED WHEN PISTON IS AT… | ||
| scan0018 | Request for a new connecting rod and eccentric for the 'SS' vacuum pump drive test engine. | ||
| View original record | RHC. from Hs/ACL. 47510 Hs/ACLL/LG22.11.28. 'SS' VACUUM PUMP DRIVE. Would you please prepare a new conn. rod and eccentric for the SS. test engine as per following dimensions. Eccentric 2.435 - 1/2… | ||
| scan0019 | The seizure of a vacuum pump's cam wheel eccentric due to thermal expansion and insufficient clearance. | ||
| View original record | To R. from Hs/ACL. c.c. to BJ. Wor. c.c. to E. DA. c.c. to BY. 'SS' VACUUM PUMP - CAM WHEEL ECCENTRIC. We have had a case of seizure of the vacuum pump conn. rod bearing on the bronze eccentric after… | ||
| scan0020 | Suggesting increased clearance between the eccentric and connecting rod following tightness issues on an SS engine. | ||
| View original record | contd :- -2- get between the eccentric and conn. rod if ample clearance is provided. Signs of tightness on these parts were noted on the first SS. engine but no trouble was experienced after they had… | ||
| scan0021 | Modification to the clearance for the 'SS' vacuum pump cam wheel eccentric. | ||
| View original record | BY/CS. c. Hs. c. RHC. +7510 BY4/G.26.11.28. 'SS' VACUUM PUMP - CAM WHEEL ECCENTRIC. Please note that the minimum positive clearance between the bronze eccentric and the bearing working on same should… | ||
| scan0022 | Performance issues with the 'SS' vacuum pump and a recommendation for its improvement. | ||
| View original record | To E. from Hs/Rn. X7510 Hs/Rn6/LG4. 1.29. 'SS' VACUUM PUMP. X.7510 We have been going over the points which must have attention before the SS. can be considered a saleable proposition. The exhaust… | ||
| scan0023 | Construction of a silencer for a noisy vacuum pump and recommending its application to SS engines. | ||
| View original record | To E. from Hs/ACL. c. to BY. c. to Wor. X7510 Hs/ACL1/LG23.1.29. SILENCING RELEASE AIR FROM SS. VACUUM PUMP. X7510 X442 The release air discharge from the vacuum pump being intermittent is rather… | ||
| scan0024 | Arrangement of a vacuum pump silencer for a super sports engine. | ||
| View original record | V526. 1.250 1.650 DIA. .218 DIA. SIXTEEN HOLES .062 DIA. SPACED AS SHOWN. SCALE 1/1 ARRANGEMENT OF VACUUM PUMP SILENCER. (SUPER SPORTS ENGINE) UNION FOR EXHAUST PIPE FROM PUMP. 21-12-38 | ||
| scan0025 | Simplification of the petrol supply and reserve system. | ||
| View original record | Hs. E. DA. BY. from R. +7510 R2/M30.1.29. SS. PETROL SUPPLY AND RESERVE. X.7460 X.7510 Everything should be made as simple as possible but it must achieve its object. I agree that it will be better to… | ||
| scan0026 | Lubrication and design points for a dynamo drive and an air pump. | ||
| View original record | R. from E. c. to BJ. Hs. BY. +7510 E2/M23.1.29. 'SS' DYNAMO DRIVE, & AIR PUMP. X.7100 X.7510 We attach herewith a blueprint of LeC.2831 dealing with a number of points as follows :- (1) LUBRICATION OF… | ||
| scan0027 | Test report on the 'SS' Vacuum Pump's performance with low fuel levels in a car in France. | ||
| View original record | X7510 To E. from Hs/Rm. Hs/Rm2/LG31.1.29. 'SS' VACUUM PUMP. X7510 X7460 With further reference to the vacuum pump. We asked GWH. to carry out a test for us on the car in France to see what actually… | ||
| scan0028 | Proposal for a new vacuum pump oil pipe connection, with an attached blueprint, to solve a twisting problem with the current tee joint. | ||
| View original record | R. from E. c. to Sg. Hs. BY. X7510 E1/M4.2.29. VACUUM PUMP OIL PIPE CONNECTION. X.7510 E.7190 Blueprint LeC.2660 attached shews our proposal for the above. We understand that the present connection is… | ||
| scan0029 | Modifying the Autovac petrol feed tap on Phantom & 'SS' models to prevent petrol starvation by enlarging the tap holes. | ||
| View original record | To DA. from Hs/AJL. c. to BY. E. c. to MOr. X7510 Hs/AJL/LG4. 2. 29. AUTOVAC PETROL FEED (PHANTOM & 'SS'). X7510 X3579 Several cases of petrol shortage have been traced to foreign matter in the cork… | ||
| scan0030 | Note on the importance of correct hole drilling in tap manufacturing for autovac and carburetter systems. | ||
| View original record | contd :- -2- In the manufacture of these taps it is very essential to ensure that the drilling of the holes is correct. If the horizontal holes do not coincide with the hole from the autovac and with… | ||
| scan0031 | Standardisation sheet for water heating for S/C carburetters and a note regarding a delayed vent pipe. | ||
| View original record | To Hs from G/Rb. X7510 G/Rb.5/N/139A/BJ.13.2.29. Standardisation Sheet for Water Heating for S/C Carburetters Hs/LG.9.2.29. We understand RHC has got this sheet in hand. Standardisation X.No.7510 Vent… | ||
| scan0032 | Proposals for a reserve petrol device in an Autovac tank, including Mr. Royce's needle valve suggestion. | ||
| View original record | BY. from DA. c. to SG. Hs. 47510 DAL/M14.2.29. SS. PETROL SUPPLY - AUTOVAC. X.3579 X.7510 With reference to the proposed reserve contained in the autovac tank, we send herewith N.sch.2828/9 shewing… | ||
| scan0033 | Modification for a two-level device, likely a fuel tap, with a diagram of its operation. | ||
| View original record | DA/EV. Hs: from R. c. to SG. Wor. BY. E. X7510 R2/M22. 2. 29. AUTOVAC. X.3579 X.7510 My two level device for this could be better carried out as EV. suggests by modification to the cork faced tap.… | ||
| scan0034 | Recommending a change to the lubrication scheme for the S.S. vacuum pump and dynamo pinion bush due to excessive oil issues. | ||
| View original record | HY. E. }from Hs/ACL. Wor. } c. to RHC. Hs/ACL2/T1 9.3.29. X7510 S.S. VACUUM PUMP AND DYNAMO PINION BUSH LUBRICATION. X7510 X7100 The latest lubrication scheme LeC.2660 for the vacuum pump and dynamo… | ||
| scan0035 | Recommendation to increase vacuum pump piping diameter to 5/16 inch to improve fuel supply efficiency. | ||
| View original record | BY. from Hs/ACL. c. to E. c. to Wor. [Handwritten] X7510 Hs/ACL1/LG20.3.29. 'SS' VACUUM PUMP. [Handwritten, crossed out] X7510 [Handwritten, crossed out] X7230 We find as the result of experiment that… | ||
| scan0036 | Chasing the signed copy of the standardisation sheet for a vent pipe from the petrol filter to the Autovac tank. | ||
| View original record | To Hs from G/Rb. X7510 G/Rb.3/N/139A/BJ.5.4.29. Standardisation of Chassis Parts Sheet X.No.7510 Vent Pipe from Petrol Filter to Autovac Tank. We are still waiting for the signed copy of the above… | ||
| scan0037 | Objection to a standard sheet for a vent pipe from the petrol filter to the Autovac tank. | ||
| View original record | Hs. from RS. X7510 RS2/M12.4.29. STD: SHEET. VENT PIPE FROM PETROL FILTER TO AUTOVAC TANK. X. 7510 X. 3579 Replying to Hs/LG5.4.29., when this sheet was issued R. objected to signing it. Whether he is… | ||
| scan0038 | Proposal to use studs instead of screws for the SS air pump assembly to ease installation. | ||
| View original record | X.7510 E1/M12.4.29. BY. from E. c. to SG. Hs. RHC. RE. SS. AIR PUMP ASSEMBLY. Regarding the question of assembling the camshaft wheel and air pump conn. rod in position on the engine we propose to use… | ||
| scan0039 | Modifications to improve the efficiency of the S.S. Vacuum Pump. | ||
| View original record | X7510 To BY. from Hs/ACL. c. to E. Wor. Hs/ACL2/LG 22.5.29. S.S. VACUUM PUMP. We have proved that the efficiency of the SS. Vacuum pump is appreciably increased by enlarging the lower - or suction… | ||
| scan0040 | Modifications to the SS. Vacuum Pump to increase efficiency. | ||
| View original record | X7510 To BY. from Hs/ACL. c. to Wor. E. Hs/ACL1/LG4.6.29. SS. VACUUM PUMP. The appended prints V.640/1 shew modifications we have made to the ports in both piston and cylinder of the SS. Vacuum pump… | ||
| scan0041 | Blueprint detailing modifications to a vacuum pump cylinder for an S.S. Engine. | ||
| View original record | V640. SIZE & POSITION OF EXHAUST PORT IS UNALTERED. .031 RAD. SCALE 1/1. FOR ALL OTHER DIMENSIONS SEE E78794. MODIFICATION TO VACUUM PUMP CYL. (S.S. ENGINE) 1.875 CTR. ±2 1.044 CTR. ±2 .0625 +5 .125… | ||
| scan0042 | Blueprint of a modification to a vacuum pump piston for an S.S. Engine. | ||
| View original record | V641. FOR ALL OTHER DIMENSIONS SEE E78795. SECTION 'DD'. SECTION THRO' DD IS UNALTERED. .550 ±.5. .875 DIA. CUTTER. .900 ±5. .125 ±5. SCALE 1/1. MODIFICATION TO VACUUM PUMP PISTON. (S.S. ENGINE). AHP… | ||
| scan0043 | Drawing detailing a modification to a vacuum pump cylinder for an S.S. engine. | ||
| View original record | V640. 1.875 CTR. ±2 1.044 CTR. ±2 .0625 ±5 SIZE & POSITION OF EXHAUST PORT IS UNALTERED. .031 RAD. .125 ±5 .400 ±10 SCALE 1/1. FOR ALL OTHER DIMENSIONS SEE E78794. MODIFICATION TO VACUUM PUMP CYL.… | ||
| scan0044 | Modification drawing for a vacuum pump piston for an S.S. engine. | ||
| View original record | V.641. FOR ALL OTHER DIMENSIONS SEE E78795. SECTION THRO' DD IS UNALTERED. SECTION "DD". .550 ±5 .875 DIA. CUTTER. .900 ±5 .125 ±5 SCALE 1/1. MODIFICATION TO VACUUM PUMP PISTON. (S.S. ENGINE) HDP… | ||
| scan0045 | Required alteration to the stand pipe in S.S. Autovac Tanks. | ||
| View original record | To By. from Hs/ACL. C. to Wor. SFT. x7510 Hs/ACL1/MJ.8.7.29 S.S.Autovac Tanks. 73579 It has been found that the stand pipe (F80638) in the Autovac tank traps slightly more than 4 1/2 pints for the… | ||
| scan0046 | Extract detailing an oil leak issue with the vacuum pump on the S.S. Chassis and proposing a fix. | ||
| View original record | EXTRACT FROM :- X/Y510. Hs. c. By. ______ Mx5/OG8. 8. 29. _________ Re. S. S. CHASSIS. ---------- 4. VACUUM PUMP. The oil exhausted from the vacuum pump passes into the carburetter intake, and as it… | ||
| scan0047 | Proposal for a design change to the J.2 Series Vacuum Pump to re-route its air exhaust. | ||
| View original record | BY/CS. c. Hs. 17510 BY1/G.16.8.29. VACUUM PUMP. J.2 SERIES. --------------------------- It is most important that we should get out a scheme as quickly as possible by which we return the air we… | ||
| scan0048 | Standard production test procedure for the Autovac fuel system to ensure efficient operation. | ||
| View original record | To Ey. from Hs/Rm. C: To Mr. MX. C. to Roy. filing X4510 Hs/Rn.1/MJ.1 6 8.29. X7510 X3579 In order to ensure that the petrol supply to the engine shall be adequate under all conditions with our new… | ||
| scan0049 | Recommendation to return faulty Autovacs to the makers for rectification due to potential petrol supply issues. | ||
| View original record | If the Autovacs do not pass this test, we think that they should be returned to the makers to be recti- fied. [We are sure that if we do not take this precaution, cars will occasionally be let down… | ||
| scan0050 | Modification to address over-oiling on the vacuum pump by discharging its exhaust into the crankcase. | ||
| View original record | X7510 To By. from Hs/Rm. c. to E. Wor. Hs/Rm. 6/MJ. 22.8.29. OVER OILING ON VACUUM PUMP. ------------------- X.740 X.3503 X.7510 (Taken from Report Book) With a view to overcoming the loss of oil, and… | ||
| scan0051 | Arranging to send a vacuum pump piston connecting rod and eccentric to Autovac Manfg. Co. Ltd. for testing. | ||
| View original record | To RHC. from HS/Rn. x7510. filing HS/Rn.1/MJ.29.8.29 x3579. X7510. With reference to the Vacuum pump cylinder piston connecting rod and eccentric which we mentioned to you yesterday. Will you please… | ||
| scan0052 | Letter from Autovac Manfg. Co. Ltd. acknowledging a letter and awaiting the arrival of a vacuum pump for reporting. | ||
| View original record | Copy of letter rec.from :- The Autovac Manfg.Co.Ltd. Heaton Norris, STOCKPORT. Messrs. Rolls-Royce Ltd., DERBY. 28th. August 1929. Dear Sirs, Experimental Department. We acknowledge receipt of you… | ||
| scan0053 | Proposing to hold up the testing of autovacs pending further instructions. | ||
| View original record | Hs/Rm. - from SFT. C. Wor. [struck through] C. BY. [struck through] C. ROY. [struck through] C. M. [struck through] x7510. SFT.4/B.2.9.29. x7570 [handwritten, crossed out] x7080 [handwritten] Memo… | ||
| scan0054 | Recurring failure in the Autovac petrol system and the necessity for further testing. | ||
| View original record | To SFT, from Hs/Rn. c. to WCR. Ey. c. to ROY. MX. X7510 filing Hs/Rn.4/W.2.9.29. X7510 X7080 With reference to SFT.4/B.2.9.28. While MX. reports that the particular failure he is investigating is not… | ||
| scan0055 | Comparative tests of a non-return valve in the Phantom II petrol supply system. | ||
| View original record | FOR FILES. From AJL. X7510. 28.10.29. PHANTOM 11 PETROL SUPPLY SYSTEM. X. 7510. X. 7460. We give herewith the result of comparative tests made with and without a non return valve in the petrol pipe… | ||
| scan0056 | Graph comparing the petrol delivery of a Phantom II feed system with and without a non-return valve, measured against engine RPM. | ||
| View original record | PHANTOM II. PETROL FEED SYSTEM. EFFECT OF NON-RETURN VALVE IN PETROL PIPE FROM REAR TANK TO AUTOVAC. (REAR TANK FULL) STANDARD SYSTEM: _________ STANDARD SYSTEM WITH NON RETURN VALVE: _ _ _ _ _ PETROL… | ||
| scan0057 | Dangerous Phantom II Autovac petrol supply failure causing the crankchamber to fill with petrol. | ||
| View original record | Hs. c. BY. c. E. c. Wor. x7510. EP5/HS.3.30. re. PHANTOM II. AUTOVAC PETROL SUPPLY FAILURE. The possibility of the engine crankchamber becoming full of petrol without the driver being definitely aware… | ||
| scan0058 | Float mechanism failure, suggesting reproduction on experimental cars and retrospective action. | ||
| View original record | - 2 - EP5/H8.3.30. the above failure mentioned above, i.e. 143-XH, and suggest you reproduce the failure on experimental cars, as I cannot quite understand why the claim that this float XX mechanism… | ||
| scan0059 | The failure and subsequent redesign of the Phantom II Autovac petrol supply float. | ||
| View original record | X7510 EP. [REDACTED] c. Hs. [REDACTED] c. Worr [REDACTED] c. P. [REDACTED] PHANTOM II - AUTOVAC PETROL SUPPLY FAILURE. Referring to EP5/H.8.3.30. Mx. drew our attention to the fact that with the air… | ||
| scan0060 | Petrol supply failure on Chassis No 21 EX, caused by a leaking Autovac float. | ||
| View original record | Works. Mr Hives.-Exp. x7510. Instruction School. EWELL, Surrey. AM1/M27-3-30. Chassis No 21 EX. ----------------- While the above car was on the road with one owner and three pupils, the petrol supply… | ||
| scan0061 | Dispatch of spare floats and the replacement of Autovacs for the Phantom II due to petrol supply failures. | ||
| View original record | x7510. To EY. from ROY. c. to Ms. c. to E c. to Wor ----------------------- ROYle/MG2.4.30 ----------------------- Phantom II - Autovac Petrol Supply Failures EP3/H2.4.30. I would confirm my remarks… | ||
| scan0062 | Recurring failures of the Autovac petrol supply float in the Phantom II model. | ||
| View original record | BY. c. Hs. E. Wor. Roy. X7510. EP5/H2.4.30. PHANTOM II. AUTOVAC PETROL SUPPLY FAILURE. Further to our EP5/H8.3.30. and your reply BY19/G.12.3.30. we have had a further case of a new car failing in… | ||
| scan0063 | Relocation of the petrol filter and the potential for air locks. | ||
| View original record | X7510 By. from E. c. Sg. WOF. Hs. E5/M24.5.30. X. 7772 X. 3701 X. 7510. L.H. P.2. POSITION OF PETROL FILTER. We send herewith Lec. 2801. shewing the petrol filter moved to the other side of the… | ||
| scan0064 | Return of autovac tanks with aluminium tops for modifications before testing. | ||
| View original record | ROY. From HS/Rn. X7510 HS/Rm.15/MJ.4.6.30. x3579 x7510 With reference to the. autovac tanks with aluminium tops which you have obtained from the Autovac Co., for us to test. Before we run these they… | ||
| scan0065 | Testing Autovacs with Aluminium heads versus Brass heads for 40/50-HP and 20/25-HP chassis. | ||
| View original record | J 7510. X 5510. Y 7510. Hs. from Roy/Ms. ROY/MS17/P6.6.30. 40/50-HP and 20/25-HP. Chassis Autovacs. We understand that BY. has asked you to carry out certain tests with Autovacs fitted with Aluminium… | ||
| scan0066 | Cooling system tests conducted at Brooklands between the 17th and 20th of June 1930. | ||
| View original record | To R. From Hs/Bm. C. to O.P. C. to Bk. C. to W. C. to Lr. x7510 Hs/Bm.1/RAJ.256.30. x788 x7220 x766 x7771 x7250 x7777 x7260 x7510 BROOKLANDS TESTS JUNE 17TH. to 20TH. 1930. We took 19-EX. car to… | ||
| scan0067 | Engine cooling improvements through various ventilation methods like bonnet shutters and undershields. | ||
| View original record | -2- He/Bn.1/26L.28.2.31.Contd. of 62 M.P.H. round the track until the heat dissipated by the cooling system balanced the heat generated by the engine at this speed. A typical curve obtained in a test… | ||
| scan0068 | Analysis of engine cooling systems, radiator variations, and oil temperatures during vehicle testing. | ||
| View original record | -3- HA/Ex.1/141.25.5.30.Contd. at least 10º C. lower when running full throttle than when touring at 60 M.P.H. as in these tests, which means that even with the cooling system in 100% condition,… | ||
| scan0069 | Vehicle performance issues related to ignition advance, overheating, and petrol supply during lap speed testing. | ||
| View original record | -4- 20° C. As the ignition advance of the car is dependent on the relay which in turn is likely to lose efficiency if the oil viscosity is very low, these high oil temperatures even dangerous from the… | ||
| scan0070 | Test report comparing vehicle performance, noting issues with an American car's speed and durability, and investigating the effects of bonnet ventilation and fan belt tension. | ||
| View original record | -5- than 19-EX. during this test. We attribute the slow speed of the American car to - (a) No cut-out. (b) Air cleaner. (c) P.1. camshaft and cylinder head and timing for best low speed acceleration.… | ||
| scan0071 | Water circulation experiments, pump performance, and comparisons with the American Phantom II. | ||
| View original record | -6- He/Bn.1/AL.28.8.R.H.Contd. greater tension (Graph (5)). The Americans use a special canvas rubber fan belt and manual tensioning, which may give them an advantage. Water Circulation. In parallel… | ||
| scan0072 | Improving engine cooling through modifications to the undershield, fan, radiator, and bonnet for high-speed performance. | ||
| View original record | -7- Hs/Rn.L/ML.25.6.31.Contd. give it, as the lower half of the radiator cannot pass air very freely at present. Attacking the undershield seems the most promising development. Fan. The fan is of more… | ||
| scan0073 | Graph plotting top water, bottom water, and oil temperatures against miles run under specific test conditions. | ||
| View original record | GRAPH I TEMP C° 90° 80° 70° 60° MILES RUN TOP WATER OIL BOTTOM WATER 19 E.X. 14 x 52 AXLE. 62 M.P.H. 6 m/m 7 1/2 m/m RAD. NO BONNET VENTILATION. ATS TEMP. 24°C | ||
| scan0074 | Graph of overheating test results for a Phantom II Cabriolet with various bonnet and undershield configurations. | ||
| View original record | GRAPH II STANDARD P.II CABRIOLET 19 E.X. Axle Ratio 14 x 52 Wt. 48 Cwt. EMPTY. TEMP. AT WHICH CAR WILL OVER-HEAT EVENTUALLY. (100°C - TOP WATER TEMP) STANDARD No VENTILATION 35°C REAR BONNET SHUTTERS… | ||
| scan0075 | Graph plotting top and bottom water temperatures against various bonnet and shutter configurations. | ||
| View original record | GRAPH III. STANDARD REAR BONNET SHUTTERS OPEN. FRONT UNDERSHIELD OFF FRONT BONNET SHUTTERS OPEN. ALL SHUTTERS OPEN. LOUVRED BONNET LOUVRED BONNET FRONT FAN OFF. TOP WATER TEMP. BOTTOM WATER TEMP. 85°… | ||
| scan0076 | Graph plotting oil and water temperature against miles run during a vehicle test. | ||
| View original record | GRAPH IV TEMP °C 100° 90° 80° 70° MILES RUN 25 30 35 62 M.P.H. C.O. CLOSED CAR OPENED FULL OUT C.O. OPEN 83 M.P.H. ATS TEMP 20°C OIL TEMP TOP WATER VENTILATED UNDERSHIELD ALL BONNET SHUTTERS OPEN | ||
| scan0077 | Graph comparing the critical ATS temperature for a spring-tensioned fan versus a positively tensioned fan belt at 62 MPH with no bonnet ventilation. | ||
| View original record | GRAPH V. 19 E.X. 62 M.P.H. No BONNET VENTILATION COMPARISON OF SPRING TENSIONED FAN AND FAN BELT TENSIONED POSITIVELY. CRITICAL ATS TEMP 40°C 30°C 20°C 10°C SPRING TENSIONED 40.5 BELT TIGHTENED CHOC à… | ||
| scan0078 | Graph comparing top water temperature against miles run for two experimental vehicle configurations (18 E.X. and 19 E.X.). | ||
| View original record | GRAPH VI. TOP WATER TEMP C° MILES RUN. 18 E.X. 19 E.X. OPENED UP TO FULL THROTTLE. Y COMPARISON OF 19 E.X. AND 18 E.X. 6 7/m/m 7 1/2 m/m RAD. 62 M.P.H. TOP WATER TEMP. No BONNET VENTILATION. Ats TEMP… | ||
| scan0079 | Blueprint showing a modification to the front undershield to improve the cooling system. | ||
| View original record | MODIFICATION TO IMPROVE COOLING SYSTEM. CUT AWAY FRONT UNDERSHIELD STANDARD FRONT UNDER SHIELD ROLLS-ROYCE, LIMITED PRINT ROOM 26 JUN 1934 DERBY | ||
| scan0080 | Testing a modified self-draining float for the Autovac petrol feed system to prevent failure from temperature effects. | ||
| View original record | To R. from Hs/AJL. E. Sg. c. Wor. E. c. De. Ey. MX. x)510. HS/AJL1/AD4.7.30. x3579 x7510 y5510 AUTOVAC PETROL FEED. Self Draining Float. As the result of our pointing out to the Autovac manufacturers… | ||
| scan0081 | Self-draining float for the Autovac system and a recommendation for its adoption. | ||
| View original record | HS/AJLL/AD4.7.30 contd. -2- via the leak in the bottom of the float. After the Autovac tank and the petrol had cooled down to atmospheric temperature the suction was again applied to the Autovac, and… | ||
| scan0082 | The production start date for a larger Autovac valve for the Phantom II to overcome petrol trouble. | ||
| View original record | Hs x7510. To Wor. from Sg. re Standardisation Sheet Sg4/E4.7.30 Copy to BY. Hs. X.No./579/7510. Referring to the above sheet for Phantom II Autovac larger valve, in view of the fact that this is to… | ||
| scan0083 | Standardisation report for a larger Autovac float chamber tank and valve to overcome petrol starvation at high speeds. | ||
| View original record | RR 755 REVISED (10H) (DG 346 19-7-29) BM. 5/643. COMPLETED 5.7.30. STANDARDISATION of CHASSIS PARTS. Date 4.6.30. Handwritten Ref: X7510. Description of Parts. AUTOVAC. LARGER FLOAT CHAMBER TANK AND… | ||
| scan0084 | Second report on Brooklands radiator tests, detailing issues with the autovac fuel supply system. | ||
| View original record | To H. from Hs/Rm. c. Sg. Wor. c. Da. L. c. Hy. Rg. c. Lr. X-7510 Hs/Rml/MJ9.7.30. X.788 X.766 X.7250 X.7260 X.7220 X.7771 X.7510 X.7772 BROOKLANDS RADIATOR TESTS. SECOND REPORT. We carried out a… | ||
| scan0085 | Analysis of how high air intake temperatures affect vacuum pump efficiency and cause fuel supply issues. | ||
| View original record | -2- temperature of the air intake to the carburetter. With an atmospheric temperature of 24°C. the air intake reached 50°C. at 75 M.P.H. As soon as the car was stopped this temperature exceeded 60°C.… | ||
| scan0086 | Cooling system fan belt alternatives and mixture strength issues at high speed. | ||
| View original record | Hs/Bml/1U9.7.30 contd. -3- by such leaks in service has been brought to our notice. COOLING SYSTEM - FAN - We confirmed our previous result that the standard spring loaded whittle belt is incapable of… | ||
| scan0087 | Tests related to pre-ignition, over-heating, radiator matrices and radiator bottom outlets. | ||
| View original record | -4- Hs/Rml/MJ9.7.30 contd. pre-ignition and over-heating. The simplest way of overcoming this is to run on the reserve. This trebles the period of full throttle work before shortage takes place. The… | ||
| scan0088 | Engine cooling circulation tests, analyzing water temperature changes with restricted flow and varying vehicle speeds. | ||
| View original record | Hs/RmL/WU9.7.30 contd. -5- CIRCULATION. We conducted tests on the track restricting the circulation until the system lost efficiency to the extent of about 2°C. top water temperature. The flow under… | ||
| scan0089 | Analysis of vehicle cooling system performance, considering factors like fan efficiency, wind, and temperatures. | ||
| View original record | -6- Hs/Rml/MJ9.7.30 contd. efficient fan, a rich mixture and a ventilated bonnet the car should not over-heat at air temperatures below 35°C. when driven all out continuously in still air, and if… | ||
| scan0090 | Recommendations for improvements to the fan belt, autovac, and cooling system, with proposed further tests. | ||
| View original record | -7- Hs/RmL/M19.7.30 contd. Our recommendations for improvement are - (1) Improved fan belt. Standardisation sheet circulated. We are so dependent on this that we think the drive might receive design… | ||
| scan0091 | Blueprint with graphs showing the effects of fan, speed, and ventilation on a vehicle's cooling system. | ||
| View original record | GRAPH I TEMPERATURE C° 85°, 80°, 75°, 70°, 65° A. NO FAN STANDARD SPRING TENSIONED WHITTLE BELT. WHITTLE BELT TIGHTENED CHOC À BLOC. BELT CHOC À BLOC AND FAN 1" NEARER RAD. TOP WATER TEMP BOTTOM WATER… | ||
| scan0092 | Series of graphs showing the effect of water circulation on overheating in a PII water system. | ||
| View original record | GRAPH II EFFECT OF CIRCULATION ON OVERHEATING 19 E.X. CAR CHART A: A BACK PRESS. CAUSED BY RESTRICTION 15 LBS/SQ' WATER OUTLET FROM THE CYL: BLOCK RESTRICTED TO 23-.125 HOLES. TOP WATER TEMP. ATS… | ||
| scan0093 | Line graph from a Brooklands test plotting top and bottom water temperature against various engine cooling configurations. | ||
| View original record | GRAPH III TEMPERATURE C° ① FULL WEAK NO FAN. ② AS ① BUT MIXTURE NORMAL NO FAN. ③ AS ② BUT FAN SPRING LOADED ④ AS ③ BUT FAN BELT CHOC À BLOC. ⑤ AS ④ BUT FAN 1" NEARER RAD. ⑥ AS ⑤ BUT DOUBLE RAD. OUTLET… | ||
| scan0094 | Graph showing the effect of temperature on complete car circulation and pump suction. | ||
| View original record | GRAPH IV EFFECT OF TEMP. ON COMPLETE CAR CIRCULATION. RADIATOR E 79951 FLOW GAL/MIN CIRCULATION GAL/MIN DEPRESSION ON SUCTION SIDE OF THE PUMP INS HG. 2500 ENGINE R.P.M. BOTTOM WATER TEMP C°… | ||
| scan0095 | Unsatisfactory fixing arrangements and poor appearance of an Autovac tank. | ||
| View original record | X 7510 By Hs. from Mx. Mx2/T23.7.30. Autovac Tank We are receiving on test Autovac tanks with the aluminium top. The fixing/arrangement for the two top unions is not satisfactory. The angle at which… | ||
| scan0096 | Complaint and suggesting design improvements for the Autovac tank stud and nut assembly. | ||
| View original record | BY. From Hs/AJL. c. to MX. x7510. Hs/AJL.3/MJ.24.7.30. AUTOVAC TANK. With reference to MX2/T23.7.30., the complaint is due to the use of the stud for holding down the clamp which holds the elbows in… | ||
| scan0097 | Recommendation to adopt the Autovac Company's modified self-draining float. | ||
| View original record | COPY. X7510. S/W. Wor. From PN. c. to Sg. c. to Hs. c. to Mx. PN.5/WT28.7.30. X. 2579. X. 7510. X. 5510. Autovac Battery Feed Self-draining Float. In the last par, of Hs/AJL/AD7.4.30. there is a very… | ||
| scan0098 | Standardisation and production of a new self-draining float for the Autovac battery feed system. | ||
| View original record | Copy. X7510 Wor absent. X.3579. X.7510. X.5510. W/S. To PN. C. Hs. EWT/FG2/H.14.8.30. Re: AUTOVAC BATTERY FEED - SELF DRAINING FLOAT. ------------------------------------------ PN.5/WT28.7.30. A… | ||
| scan0099 | The reduction of reserve petrol in the Autovac to prevent engine starvation. | ||
| View original record | To BY. from Hs/Rn. c. Da. E. X7510 Hs/RnS/MS16.8.30. X7460 X7510 Re: Two Gallon Reserve in Autovac. With the reversion to the two gallon reserve in the rear tank, we are reducing the quantity of… | ||
| scan0100 | Reduced fuel reserve in the Autovac tank for Phantom II chassis by replacing the main feed pipe. | ||
| View original record | x7510. c. Hs/Tsm. BY/HEB5/M.20.8.30. RE PHANTOM II. & L.H.PHANTOM II.CHASSIS. REDUCED RESERVE IN AUTOVAC SEC:7140. In accordance with memo' Hs/Rm3/MS 16.8.30, we attach herewith one Blue Print of:-… | ||
| scan0101 | Standardisation of a self-draining autovac float with larger stem and vent holes. | ||
| View original record | RR 755 REVISED (10H) (DG 348 19-7-29) BM. 6/643. COMPLETED 1.9.30. x7510. STANDARDISATION of CHASSIS PARTS. Date 14.7.30. Description of Parts: M/Ph SELF-DRAINING AUTOVAC FLOAT WITH LARGER STEM & VENT… | ||
| scan0102 | Standardisation of an Autovac top in aluminium for chassis parts. | ||
| View original record | RR 755 REVISED (10H) (DG 348 19-7-29) BM. 6/643. COMPLETED 9.9.30. x7510 STANDARDISATION of CHASSIS PARTS. Date 28.6.30 Description of Parts. AUTOVAC TOP IN ALUMINIUM. Origin: Saving in cost and… | ||
| scan0103 | Requesting a check of dimensions and completion of calculations for the 'SEAGULL' starting motor. | ||
| View original record | To EFC. from E. c. CJ. Wor. c. By. Hs. 9620 X.4010 E2/M19.10.22. 9620 X.4010 - "SEAGULL" STARTING MOTOR PARTICULARS We send you herewith drawing No.LeC.1644 shewing the above. Mr. Royce would like you… | ||
| scan0104 | Request for the reduction ratio and piston displacement for 'Seagull' starter motor calculations. | ||
| View original record | x7620 To E. from EFC. EFC5/T30.11.22 X.4001 - "SEAGULL" STARTER MOTOR. To enable us to get out the calculations in connection with the Seagull starter motor, we should be glad if you could give us an… | ||
| scan0105 | Specifications for a starter motor, including pinion, flywheel, and epicyclic reduction gear ratios. | ||
| View original record | X9620 S E C R E T To Hs. from E. c. CJ. E. A. C. E1/M15.2.23. X.9660 - STARTER MOTOR Further to our E6/M91222, in reply to EFC5/T301122, we expect to have a 2" starter pinion engaging with a 16"… | ||
| scan0106 | Alterations for a 40/50 dynamo and an E.A.C. starter motor, including specifications and sketches. | ||
| View original record | To Hs. from E. c. to CJ. S E C R E T x9720 E1/M28.2.23. E. A. C. x8620 x9700 x4383 RE RR. 40/50 DYNAMO, E.A.C. DYNAMO, AND E.A.C. MOTOR. Before leaving WW. Mr. Royce discussed the question of the… | ||
| scan0107 | Electrical specifications and gear ratios for a starter motor system. | ||
| View original record | (2) will have from 10 to 12 amps. and sufficient amp.turns to create a field equivalent to that of a main winding of the machine. It was also thought that with the motor on teaser circuit for the slow… | ||
| scan0108 | Starter motor to engine gear ratio, questioning the proposed 32 to 1 reduction. | ||
| View original record | (Handwritten: X8620) SECRET To E. from EFC. c. Ry. EFC3/T20.3.23. E. A. C. X.9660 - STARTER MOTOR. (Handwritten: X4383) Referring to E1/M28.2.23, we are surprised that the ratio of starter motor to… | ||
| scan0109 | The design requirements for motor windings to handle engine starting and compression. | ||
| View original record | Contd. -2- EFC3/T20.3.23. be capable of rolling the engine in the normally cold condition, and then the motor windings must be designed to give this speed and to have such a good acceleration that the… | ||
| scan0110 | Requesting a decision on the E.A.C. starter motor reduction ratio and arranging a follow-up meeting with Mr. Royce. | ||
| View original record | X/9620 To E. from EFC. c. to By. EFC1/T9.4.23. X.9620 - E.A.C. STARTER MOTOR. Are you yet in a position to give an answer to our EFC3/T20.3.23 with reference to the E.A.C. starter motor reduction… | ||
| scan0111 | Starter motor gearing ratio and starting speed. | ||
| View original record | To EFC. from E. c. to CJ. X9620 E2/M12.4.23. X.9620 - STARTER MOTOR EFCL/T9423. In reply to your EFCL/T9423 we should be glad if you could come down to WW. on Thursday next the 19th inst., bringing… | ||
| scan0112 | Table comparing the dimensions and ratios for various dynamo and motor sizes. | ||
| View original record | x9620 18.4.23. X.294. Y.543. R.R. DYNAMO & MOTOR SIZES. X.9620 X.9660 Ratio | | Carcase dia. | Armature dia. | | Air Gap. | Carcase thickness. | |---|---|---|---|---|---| | Dynamo for large car. |… | ||
| scan0113 | Technical memorandum comparing the suitability of a Goshawk starter motor for an E.A.C. engine, including E.M.F. calculations. | ||
| View original record | X9620 To E. from EFC. c. E/Mr. Stent. EFCl/T5.5.23. RE E.A.C. & GOSHAWK STARTER MOTORS. X9620 X4384 Having investigated the suitability of adaptation of the Goshawk starter motor to the E.A.C. engine,… | ||
| scan0114 | Calculations of polar flux density and related quantities for Goshawk and E.A.C. motors. | ||
| View original record | -2- Contd. A polar flux density (reckoned on the minimum pole face) of 6,000 to 7,500 lines per cm² is about right. Taking 6,500 lines per cm², ø for the Goshawk motor is 161,000 lines, and for the… | ||
| scan0115 | Technical analysis of motor performance, discussing flux density, torque, and calculations related to the Goshawk motor. | ||
| View original record | -3- Contd. By reducing the flux density to 6,000 we bring this down to 2.33 x 10¹⁰, but to bring it down to the major limit would necessitate a flux density as low as 5780. This would require so few… | ||
| scan0116 | Calculations for E.A.C. and Goshawk starter motors, focusing on the number of conductors. | ||
| View original record | 4 -3- Contd. higher, so that we are led to the conclusion that the number of conductors requires increasing. Fixing, as we do, the speed N = 1760, and taking a suitable flux density of 6500 in each… | ||
| scan0117 | Calculations for an E.A.C. starter motor. | ||
| View original record | X.9620 - E.A.C. STARTER MOTOR. (Calculations based on data given). Torque required to turn E.A.C. engine - 900 lb-inches (say) Speed reduction ratio = 32 Taking 85% gearing efficiency effective torque… | ||
| scan0118 | Page of calculations for an electric motor, detailing flux, conductors, and back E.M.F. | ||
| View original record | -2- Contd. Length = 2.75" = 69.9 mm. Useful flux per pole = 5600 x 6.99 x 4.27 = 167000 lines. Number of conductors = Tb x 10^8 / 1.41 P Ø C = 36.4 x 2 x 10^8 / 1.41 x 4 x 167000 x 108 = 71.6 No. of… | ||
| scan0119 | Page of calculations for armature resistance, length, and cross-sectional area. | ||
| View original record | -3- Contd. Assumed { RA = .0100 ohm Approx. { RF = .0115 " division. { RB = .0025 " Resistance of one armature turn = (.0100 x 4) / 37 = .00108 ohm. Length of armature turn = 11" approx. Resistance… | ||
| scan0120 | Calculations for slot area, depth, and width using copper space efficiency. | ||
| View original record | -4- Contd. Take copper space efficiency of 50% (say) Then slot area = 4 x .00692 = .02768 sq.inches. Total area of all slots = 1.02 sq. inches (A) Maximum slot depth h = √(A / 2π) = √(1.02 / 6.28) =… | ||
| scan0121 | Calculation table for ampere-turns needed to produce the required magnetic flux. | ||
| View original record | AMPERE TURNS NECESSARY TO PRODUCE FLUX REQUIRED Part. | Matl. | Length ("). | Virtual section (sq.ins). | Total flux. | Flux density Inch units. | Flux density Cm. units. | H. | AT. per inch. | A.T.… | ||
| scan0122 | Calculations for determining field winding resistance and equivalent wire gauge. | ||
| View original record | -6- Ampere turns required = 300 Amperes = 108 ∴ No of turns. = 3 Length of mean turn 9½" approx. Therefore total length of field strip = 4 x 3 x 9½ + 9 say = 123" Estimated resistance for field… | ||
| scan0123 | Calculations for the adaptation of a Goshawk-sized starter motor for an E.A.C. engine. | ||
| View original record | 1-1- X.9620 - E.A.C. STARTER MOTOR. (Calculations for adaptation of Goshawk size of motor to this work) Torque required to turn E.A.C. engine = 900 lb-inches (say) Speed reduction ratio = 32 Taking… | ||
| scan0124 | Page of engineering calculations for flux and conductors. | ||
| View original record | -2- Contd = 5/29 x π x 2.850 = 1.54" = 39 mm. Length = 2.50" = 63.5 mm. This gives a useful flux per pole of 6500 x 6.35 x 3.9 = 161,000 Number of conductors = (Tb x 10^8) / (1.41 P Ø C) = (36.4 x 2 x… | ||
| scan0125 | Secret memo discussing design improvements and performance specifications for a starter motor, including a revised drawing. | ||
| View original record | X8620 SECRET To EFC. from R. c. to CJ. E.A.C. R1/M16.5.23. X.8620 - STARTER MOTOR. This certainly should be the size having a 5" dia. carcase. In considering what possible improvements we might make… | ||
| scan0126 | Two alternative proposals for starter motor windings. | ||
| View original record | X.9620 To R. from EFC. SECRET EFC2/T3Q.5.23. c. to E. E. A. C. X.9620 - STARTER MOTOR. Reference your Rl/M16.5.23. We have two alternative proposals for the windings, the first one of which is… | ||
| scan0127 | Continued discussion on motor calculations and performance, specifically addressing abnormal results due to a high reduction ratio. | ||
| View original record | EFC2/T30.5.23. -2- Contd. particularly the high reduction ratio, have resulted in the various calculations made for this motor, leading to results rather out of the ordinary and have caused us a good… | ||
| scan0128 | Continued discussion on motor efficiency calculations, current, torque, and conductor design. | ||
| View original record | Contd. -3- EFC2/T30.5.23. 60%, resulting in a current of 145 amperes, in place of the 200 suggested by you, as this has seemed to be the only way of obtaining reasonable results in the calculations.… | ||
| scan0129 | Revised calculations for an E.A.C. starter motor under unfavourable starting conditions. | ||
| View original record | X.9620 - E.A.C. STARTER MOTOR. Revised calculations based upon LeC.1719 and RL/M16.5.23, the initial quantities being taken as relating to the assumed most unfavourable starting condition. Torque… | ||
| scan0130 | Calculations for static torque, polar flux density, and armature design. | ||
| View original record | -2- Contd. The static torque at this current must be 10% greater (say) then the running torque, i.e. it must be 60.4 lb-inches. Take a useful polar flux density of 6750 lines per cm² reckoned on… | ||
| scan0131 | Calculations for motor E.M.F. and resistance, including armature and field resistance. | ||
| View original record | -3- Contd. The back E.M.F. when rolling engine Ø Z N P = --------- 60 x 10^8 x b 201,000 x 74 x 1200 x 4 = ----------------------- 60 x 10^8 x 2 = 5.95 volts Forward E.M.F. at motor terminals = 9.00… | ||
| scan0132 | Page of calculations for armature design, including resistance, slot dimensions, and tooth width. | ||
| View original record | -4- Contd. Resistance per 1000' = 12000 / 11 x .000757 = .826 ohm. But ohms per 1000' at 20°C = .00815 ÷ cross sectional area (a) Whence a = .00815 / .826 = .00986 sq.ins. Take copper space efficiency… | ||
| scan0133 | Calculation table for Ampere Turns required to produce a specific magnetic flux in various components. | ||
| View original record | -5- AMPERE TURNS NECESSARY TO PRODUCE FLUX REQUIRED. | Part. | Matl. | Length (") | Virtual section (sq. ins) | Total Flux. | Flux density | H. | AT. per Inch. | A.T. |… | ||
| scan0134 | Page of calculations for electrical field windings, including ampere turns, resistance, and wire gauge. | ||
| View original record | -6- Contd. Ampere turns per pole required = 434 Amperes = 145 Turns per pole required = 3 Or say 3½ if a half turn is (as we understand) desirable from the point of view of getting in the connections.… | ||
| scan0135 | Motor winding specifications, including turns, resistance, and flux density. | ||
| View original record | -7- Contd. Since ample room is available, it is suggested that 3½ turns of any convenient section larger than the above, consistent with allowing room for the teazer winding (if this is still… | ||
| scan0136 | Secret blueprint showing revised dimensions for a starter motor. | ||
| View original record | [ "LFC 1719", "3.12", "6.000", ".125", "3.125 INSIDE POLE SHOES", "3.100", "ARMATURE DIA", "1.800", "ROLLS-ROYCE, LIMITED", "PRINT ROOM.", "23 MAY. 23", "DERBY", "SECRET FAC", "REVISED STARTER MOTOR… | ||
| scan0137 | Calculations for the 40/50 starter motor and proposing new overload test conditions and design modifications. | ||
| View original record | +7620 To EFC. from R. c. CJ. c. By. R4/M4.6.23. X.S620. 40/50 STARTER MOTOR. I am in receipt of your calculations with reference to the starter motor - 40/50. This motor and the 30 to 1 reduction gear… | ||
| scan0138 | Technical memo discussing the design and characteristics of a motor, specifically its teezer circuit and windings. | ||
| View original record | Contd. -2- R4/M4.6.23. than the maximum flux is that the torque will increase with the square of the current and the motor speed will decrease with the load, and therefore the demand for current in… | ||
| scan0139 | The motor's main series winding, resistance, and progress on the dynamo and starter motor for the 40/50 model. | ||
| View original record | Contd. -3- R4/M4.6.23. Regarding the main series winding of the motor we should make this pro rata in current carrying capacity with the armature. We should not add any resistance to absorb volts… | ||
| scan0140 | Winding specifications for a starter motor in relation to a drawing. | ||
| View original record | To EFC. from E. X.9620. S E C R E T E. A. C. X.9620 - STARTER MOTOR. Referring to drawing LeC.1728., we should be glad to know whether the spaces allotted to the main field winding and the teazer… | ||
| scan0141 | Secret memo regarding calculations for an E.A.C. Starter Motor winding. | ||
| View original record | SECRET. X 9620 To E. from EFC. E. A. C. EFC1/T17.6.23. X.9620 - E.A.C. STARTER MOTOR. Reference your E1/M15.6.23 - we have made the necessary calculations and at the moment a trial is being made on… | ||
| scan0142 | Calculations for an E.A.C. starter motor teazer winding. | ||
| View original record | X.7620. X.9620. E.A.C. STARTER MOTOR TEAZER WINDING. Winding proposed 38 turns of 18 S.W.G. wire Length of mean turn = 2π x 1.1 + 2 x 1.8 + = 6.92 + 3.60 = 10.52" Resistance at 20°C of whole winding =… | ||
| scan0143 | Revised calculations for the E.A.C. Starter Motor. | ||
| View original record | X.7620 SECRET. E. A. C. To R. from EFC. c. CJ. BY. EFC4/T19.6.23. X.9620 - RE E.A.C. STARTER MOTOR. Answering your R4/M4.6.23, herewith please receive further calculations revised to suit as nearly as… | ||
| scan0144 | Proposed experimental arrangements for main and teazer windings for a motor. | ||
| View original record | Contd. -2- EFC4/T19.6.23. the scheme sent herewith, which has been got out for us by the D.O., shows these two arrangements of main and teazer windings, both of which are proposed for experiment in… | ||
| scan0145 | Calculations for the performance and electrical characteristics of an E.A.C. starter motor. | ||
| View original record | X.9620 - E.A.C. STARTER MOTOR Overload engine torque assumed to be 1900 lb-inches. 825 Speed reduction ratio = 30 13 Taking 85% gearing efficiency, effective torque ratio = .85 x 30 = 25.5 11.04… | ||
| scan0146 | Calculations for static torque, flux density, armature dimensions, and number of conductors. | ||
| View original record | -2- Contd. The static torque at this current must be 10% greater (say) than the running torque, i.e. it must be 82 lb inches. Take a useful polar flux density of 6700 lines per cm² reckoned on minimum… | ||
| scan0147 | Calculations for back E.M.F. and total motor resistance. | ||
| View original record | -3- Contd. The back E.M.F. when rolling engine = Ø Z N P --------- 60 x 10⁸ x b = 200,000 x 82 x 900 x 4 ---------------------- 60 x 10⁸ x 2 = 4.92 volts Forward E.M.F. at motor terminals = 8.44 Hence… | ||
| scan0148 | Page of calculations for armature resistance, dimensions, and slot area. | ||
| View original record | -4- Contd. Resistance of one armature turn = .007 x 4 / 41 = .000683 Length of armature turn = 11" approx. Resistance per 1000' = 12000 / 11 x .000683 = .746 W But ohms per 1000' at 20°C = .00815 ÷… | ||
| scan0149 | Page of calculations for armature and field winding specifications. | ||
| View original record | -5- Contd. Armature diameter at root of tooth = 3.100 - .875 = 2.225 Circumference ditto = 7.00" For one tooth and slot = .171 Hence width of tooth at root = .071 (Here see table p.6) Ampere turns per… | ||
| scan0150 | Calculation table for ampere-turns required to produce a specific magnetic flux in various motor/generator parts. | ||
| View original record | -6- AMPERE TURNS NECESSARY TO PRODUCE FLUX REQUIRED Part. | Matl. | Length (") | Virtual section (sq.ins) | Total flux. | Flux density Inch Units. | Cm. Units. | H. | A.T. per inch. | A.T. Armature… | ||
| scan0151 | Calculation of a strip's cross-sectional area and its equivalent in Standard Wire Gauge (S.W.G.). | ||
| View original record | -7- The cross sectional area of the strip = .00815 / .695 = .0117 sq.in. i.e. equivalent nearly to 10 S.W.G. round wire. EFC. | ||
| scan0152 | Current requirements and winding design for a starter motor. | ||
| View original record | X.9620. To EFC. from R. S E C R E T E. A. C. R3/M29.6.23. X.9620. STARTER MOTOR. With reference to your calculations regarding the starter motor, the current required for turning this motor with a… | ||
| scan0153 | From 'E' to 'EFC' inquiring about the status of the main and teazer windings for a starter motor. | ||
| View original record | X. 9620. SECRET ---------- To EFC. from E. E.A.C. E4/M16.8.23. STARTER MOTOR. As we are a little uncertain at this stage how the windings for the above job stand could you kindly let us know whether… | ||
| scan0154 | Responding to a query about the status of the E.A.C. Starter Motor project. | ||
| View original record | To E. from EFC. EFC5/T20.8.23. c.c. BY/DS. X9620 X.9620 - E.A.C. STARTER MOTOR Answering your E4/M16.8.23, the last that transpired on this job was R's note R3/M29.6.23 (copy herewith) to us, since… | ||
| scan0155 | Current improvements for larger motors and starter motor circuits. | ||
| View original record | x7620 SECRET To EFC. from R. R4/M20.9.23. E.A.C. X.9620. RE CURRENT IMPROVEMENTS. X.9630. The modification for the double brushes for the larger motors will be sent this week, the first model… | ||
| scan0156 | Copy of a telegram regarding starter winding conductor specifications. | ||
| View original record | X.9620. COPY OF TELEGRAM SENT ON 1.10.23. to:- ELLIOTT. ELMSTEAD. WEST WITTERING. LEC.1735 SHOWS STARTER WINDING FOUR CONDUCTORS PER SLOT. CALCULATIONS SENT 19.6.23 BASED ON TWO STOP HAVE NOT BEEN… | ||
| scan0157 | Specifications for an E.A.C. starter motor, specifically regarding the armature and teazer windings. | ||
| View original record | S E C R E T. X9620 To E. from EFC. EFC5/T5.10.23. X.9620 - E.A.C. STARTER MOTOR. With reference to my telegram of the 1st. inst and your reply of the 2nd inst., dealing with the E.A.C. starter motor… | ||
| scan0158 | Secret memo providing specifications for the X.9620 starter motor windings. | ||
| View original record | To EFC. from R. S E C R E T. Rl/M13.10.23. x7620 E.A.C. X.9620 - STARTER MOTOR. Referring to your memo EFC5/T5.10.23., we now understand that Derby are working to drawings and instructions giving the… | ||
| scan0159 | Query regarding increasing the armature slot depth on a starter motor to accommodate banding wire. | ||
| View original record | x 9620 FFC. BY/Ds16/H. 19. 10. 23. X.9620. STARTER MOTOR. Referring to Lec. 1776, the depth of Armature slot shown is .490 and this is not sufficient to allow banding wire to be put on the End… | ||
| scan0160 | Increase in the slot depth for an E.A.C. starter motor. | ||
| View original record | To By/Ds. from EFC. S E C R E T X.9620. EFC3/T20.10.23. X.9620. E A.C. STARTER MOTOR. Answering your By/Ds16/H19.10.23. It will be in order to increase the depth of the slot to .520". The slot sizes… | ||
| scan0161 | Requesting blueprints for starter motor armature and commutator components, highlighting a potential assembly issue. | ||
| View original record | X 9620 To [REDACTED] C. EFC. BY/RD9/ML4.12.23. X.9620. RE E.A.C.1 - STARTER MOTOR ARMATURE AND COMMUTATOR. Please receive herewith 1 Blueprint of each of the following details:- D.70303 - Armature… | ||
| scan0162 | Material selection for the E.A.C. starter motor pole pieces. | ||
| View original record | X. 9620. To By/RD. from EFC. EFC8/T5.12.23. c. BY c. RHC. X.9620 - E.A.C. STARTER MOTOR. With reference to your By/RD2/ML5.12.23, we do not think in view of Mr. Royce's note R3/M30.11.23 that any work… | ||
| scan0163 | Blueprints and design considerations for a starter motor field winding. | ||
| View original record | x 9620 C. EFC. X.9620 - STARTER MOTOR FIELD WINDING - E.A.C.1. We send you herewith 1 Blueprint of each of the following details:- D.70302 - Rivet for Field Connections. D.70304 - Winding Diagram.… | ||
| scan0164 | Development status of a new sequence silent starter for a large chassis engine. | ||
| View original record | X 7620 To EY. } from R. EFC. } Hs. } c. to CJ. BJ. c. to RG. PN. R2/M10.12.23. X.4168b. X.9620. X.9650. SEQUENCE SILENT STARTER We have had in hand for some time quite a promising scheme of starter… | ||
| scan0165 | The components and functionality of a new sequence silent press button starter system. | ||
| View original record | ✓7620 SECRET To RG & Da. from R. c.c. to CJ. BJ. Wpr. E.A.C.1 & 2. EFC. Hs. Ev. EP. R3/M1.1.24. X.9650 X.9620. RE STARTER. SYSTEM. You will remember that we are fitting our own RR. system of sequence… | ||
| scan0166 | Design of an electromagnetic component, focusing on windings, springs, and resistance. | ||
| View original record | -2- R3/M1.1.24. We have arranged convenient copper strips and connections and this rish should ensure the magnet acting against a good pull off spring which is necessary for establishing a good… | ||
| scan0167 | Production of the first sets of poles for the starter motor. | ||
| View original record | X.9620 To RHC. C. EFC. BY/RD2/AL7.1.24. X.9620 - STARTER MOTOR. With reference to EFC8/TB.12.23., regarding the material of the Poles for the Starter Motor, will you please produce the first sets in… | ||
| scan0168 | Secret memorandum detailing the design and operation of a new starter system. | ||
| View original record | TO RG. E. & DA. FROM R. Copy to CJ. BL. WOR. EPG. HS. BY. EP. x7620 S E C R E T. R3/M1. 1. 24. E.A.C.1 & 2. RE. STARTER. x7620 x965D SYSTEM. You will remember that we are fitting our own RR. system of… | ||
| scan0169 | Design of an actuating magnet, its windings, and components. | ||
| View original record | (2) We have arranged convenient copper strips and connec-tions and this rush should ensure the magnet acting against a good pull off spring which is necessary for establishing a good contact for the… | ||
| scan0170 | Secret memorandum concerning the progress and design delays of the X.9620 starter motor. | ||
| View original record | X 9620 To E.) from R. ST) c. CJ. c. WQR. c. RG. c. Da. c. FY. c. EFC. c. Hs. S E C R E T E. A. C. STARTER MOTOR. X.9620. I am very anxious not to be in the way of getting something done, but naturally… | ||
| scan0171 | Secret memo discussing production arrangements for a new model, focusing on the starter motor and gearbox operation. | ||
| View original record | TO E. & EFC. FROM R. SECRET. R3/M29.2.24. Copy to CJ. BJ. RG. NOR. DA. HS. HY. re. EAC. 11. & 1V. Handwritten notes: X7620 X9320 X9650 X8620 X9770 O Owing to output considerations Mr. Johnson and I… | ||
| scan0172 | Secret memorandum discussing specifications for an electric starter and solutions for engine vibrations. | ||
| View original record | X9620 To R. from E. c. to CJ. S E C R E T. E1/M14.3.24. ENGINE. X.9620 X.9550 re. ELECTRIC STARTER. X.9620 Please find attached a blue print of LeC.1348., shewing the quantities suggested for the… | ||
| scan0173 | The rigidity of an engine mounting design. | ||
| View original record | contd:- -2- the engine has therefore been rigged up to suit the occasion under disadvantages, and from what we remember of it we should think it cannot be as rigid as the design made for the job. We… | ||
| scan0174 | Measurement record for the resistance of an EAC S+ motor main field winding. | ||
| View original record | X.9620. EFC. PC.39. Mar. 20th 1924. RESISTANCE OF EAC. S+ MOTOR MAIN FIELD WINDING The resistance of the above winding is .01312 ohm at 16.5°C. Instruments used were:- No.22407 on millivolt range.… | ||
| scan0175 | The resistance measurement of a Teazer Winding for an EAC S. Motor. | ||
| View original record | EFC. PC.40. X.9620. Mar. 21st. TEAZER WINDING OF EAC. S. MOTOR. The resistance of the above winding is .488 ohm at 16°C. Instruments used were:- No.40. on the 1.5 volt range. No.40 on the 1.5 ampere… | ||
| scan0176 | Providing simplified blueprints for a starter motor field winding and associated parts. | ||
| View original record | X9620 TO RHOT C. IBC C. EFC. BY/RD2/ML1 3.5.24. X.9620 - STARTER MOTOR - E.A.C. Referring to the difficulty of producing a Field Winding to our drawing D.7034, we now send you herewith a much simpler… | ||
| scan0177 | Secret memorandum on insulating tab connections for an EAC starter motor. | ||
| View original record | To EFC. From E. c. to BY. X 9620 S E C R E T. E. A. C. E1/M3.7.24. X.9620. STARTER MOTOR. Regarding the question which was raised concerning the insulation on the tab connections of the coil and… | ||
| scan0178 | Proposing a more suitable method for the starter motor field winding, referencing drawing D.70608. | ||
| View original record | X.9620 To E. from EFC. c. EY. c. EY/RD. SECRET EFC6/T7.7.24. E. A. C. X.9620. STARTER MOTOR - FIELD WINDING. Referring to E1/M3.7.24, I am sending you herewith a print of D.70608, representing the way… | ||
| scan0179 | Drawings and design modifications for an engine and gearbox undershield. | ||
| View original record | x8620 To EY. from E. c. to CJ. HS. S E C R E T. E.A.C.11. ENGINE AND GEARBOX UNDERSHIELD. X.9290 X.9770 X.9620 We send you herewith five drawings Nos. Lec.1892 to 1896 inclusive, dealing with the… | ||
| scan0180 | Seeking agreement on the proposed method for starter motor field winding. | ||
| View original record | X. 9620. S E C R E T. To E. from EFC. EFC5/T20.8.24. E. A. C. X.9620. STARTER MOTOR . FIELD WINDING. Referring to our note EFC6/T7.7.24 under cover of which we sent a print of D.70608, representing… | ||
| scan0181 | Resistance measurements of the main field and teazer windings of an E.A.C. S. Motor. | ||
| View original record | RR 238 (150 BKS.) (SH57.29-6-20.) MP 224358 ROLLS-ROYCE, LTD. INSTRUCTIONS. To E.Y.B. Order No. WA76 Customer's No. X9620 Resistances of main field winding and teazer winding of E.A.C S. Motor marked… | ||
| scan0182 | Resistance measurements for the main field and teaser windings of an E.A.C. S. Motor marked B. | ||
| View original record | RR 239 (150 BKS.) (SH57.29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.F.b. Order No. WA 77 Customer's No. X 962 D Resistances of main field winding and teaser winding of E.A.C. S. Motor… | ||
| scan0183 | Instruction sheet detailing resistance measurements for an E.A.C. S. Motor's windings. | ||
| View original record | RR 238 (150 BKS.) (SH57. 29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.Y.B Order No.: Wa 79 Customer's No.: X 9620 Resistances of main field winding and Teazer winding of E.A.C. S. Motor… | ||
| scan0184 | Instruction sheet regarding the preliminary inspection of an EAC S. Motor A. | ||
| View original record | RR 238 (150 BKS.) (SH57.29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To EFC Order No. PC82 Customer's No. X 8620 Date Sept. 24th 1924 Preliminary Inspection of EAC S. Motor A. Insulation OK.… | ||
| scan0185 | Comparison of field windings for starter motors A, B, and C. | ||
| View original record | X.9620 X.9620. EAC.II. STARTER MOTORS A, B, and C. FIELD WINDINGS. A. This motor has the teazer and main winding wound to drawing D.70608. (Proposed standard). B. The main winding on this motor has… | ||
| scan0186 | Confirming the size of starter motor poles and clarifying winding specifications. | ||
| View original record | X 8620 To EFC. BY/RD/ML/15.9.24. X.8620 - E.A.C. STARTER MOTOR POLES. We shall be pleased if you can confirm that the size of Pole - D.70327 for the Starter Motor is now correct, so that we may be… | ||
| scan0187 | Calculations for the EAC.II starter motor, specifically the turns per pole and pole core cross-sectional area. | ||
| View original record | To BY/RD. from EFC. X7620 EFC5/T15.9.24. X.8620. EAC.II STARTER MOTOR. Answering your BY/RD1/M415.9.24. we hope this week to have one at least of these motors for test and would prefer, before… | ||
| scan0188 | Reduction of a motor core cross-section for Ubas steel forgings. | ||
| View original record | EFC5/T15.9.24. -2- Contd. reduce this motor core cross section before putting the tools in hand for the Ubas steel forgings, but experiment should determine whether this is necessary or desirable. It… | ||
| scan0189 | Light test report for an EAC Starter Motor A. | ||
| View original record | ROLLS-ROYCE, LTD. INSTRUCTIONS. To: EFC Order No.: PC 83 Customer's No.: X 8620 Light Test of EAC Starter Motor . A. Main field winding in circuit only. At the end of 30 minutes running on 6.0 volts,… | ||
| scan0190 | Secret memo requesting an experimental modification to an EAD.II starter motor armature. | ||
| View original record | S E C R E T. X9620 To BY/RD. from EFC. E. A. C. EFC4/T29.9.24. X.8620. EAD.II. STARTER MOTOR. Would you kindly instruct for one armature to be made up experimentally with armature conductors of… | ||
| scan0191 | The gear reduction ratios for the EAC.II starter motor. | ||
| View original record | x7620 EFC/T29.9.24. X.8620. X.8640. EAC.II. STARTER MOTOR REDUCTION GEAR. The epicyclic reduction gear of the motor gives a reduction from 9 to 2. The reduction from the motor pinion to engine… | ||
| scan0192 | Experimental starter motor armature wound with smaller section wire, including associated part blueprints. | ||
| View original record | Mr. Coverley. c. EFC. X7620 BY/RD29/W.9.10.24. X.8620. STARTER MOTOR ARMATURE. E.A.C.II. Following a request from EFC. to try an armature wound with smaller section wire, we send you herewith one… | ||
| scan0193 | Request to create a new Teaser Winding for an E.A.C.11 starter motor. | ||
| View original record | x7620 TO RMC C. EFC. BY/RD3/ML5.11.24. X.8620 - E.A.C.11 STARTER MOTOR TEASER WINDING. Will you please put in hand a new Teaser Winding for the Starter Motor Field consisting of 30 turns of 17 S.W.G.… | ||
| scan0194 | Representative performance quantities for an EAC.II starter motor. | ||
| View original record | X 7620. EFC2/T7.11.24. X.8620. EAC.II. STARTER MOTOR. Representative performance quantities on the basis of overload engine torque of 1900 lb-inches. Actual figures Speed reduction ratio = 30. 28.9.… | ||
| scan0195 | Improved function of a 55° angle thread Bendix pinion on an EAC starter motor. | ||
| View original record | To EFC from RHC. x 7620 RHC1/EU 13. 11. 24. RE EAC STARTER MOTOR. We have now fitted to the starter motor on 93 NK the Bendix pinion with the 55° angle thread in place of the 45°, and in our opinion… | ||
| scan0196 | To put previous instructions regarding the EAC.II starter motor on hold. | ||
| View original record | X 7620 EFC1/T18.11.24. To RHC. from EFC. c. EY/RD. EAC.II STARTER MOTOR. Would you kindly note that in view of developments on the EAC. Silent Starter Scheme, the instructions contained under… | ||
| scan0197 | Modifications to the motor for the EAC Sequence Silent Starter. | ||
| View original record | X7620 To RHC. Extract from EFCL/T14.1.25. X.8650. EAC SEQUENCE SILENT STARTER. As regards the motor, we have now instructed BY/RD. to reduce the size & the pole core, and this will enable the windings… | ||
| scan0198 | Field pole coil size for a starter motor. | ||
| View original record | C. EFC. X/620 BY/RD2/ML15. 1. 25. X.8620 - E.A.C.11 - STARTER MOTOR. Referring to EFC1/T14. 1. 25, suggesting that the reduced size field pole coil should be fitted to the motor you are supplying to… | ||
| scan0199 | Calculations and possible design reductions for EAC starter motor poles. | ||
| View original record | Y620 15.1.25. X.8620. EAC. STARTER MOTOR POLES. Reference EFC5/T15.9.24. EFC's original calculations were based on a rectangular cross section of 2.45" x .940" = 2.30 sq. ins. It has been confirmed… | ||
| scan0200 | Instruction sheet detailing resistance measurements for a rewound EAC & S Motor A. | ||
| View original record | RR 238 (150 BKS.) (SH57.29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. x/620 To: E F C Order No.: PC 91 Customer's No.: X 8620 Date: Jan 20th. 1935 E.A.C. & S. Motor A. Resistance of Teazer… | ||
| scan0201 | Specification sheet detailing the particulars of a starter motor, including dimensions and electrical data. | ||
| View original record | X8626 -18- Contd. Extract from Instruction Book Matter. 23-2-25 Starter Motor Particulars. Carcase. Diameter 6.000" Length 5.175 Thickness .325 Armature. Diameter 3.600 Active length 2.250 Length of… | ||
| scan0202 | Confirming alterations to the third EAC starter motor, including pole core size and winding disposition. | ||
| View original record | To RHC. from EFC. c. BY/RD. X4/20 EFC5/T28.4.25. X.8620. EAC. STARTER MOTOR. This will confirm our conversation of yesterday that the third EAC. motor which you are making up, which presumably we… | ||
| scan0203 | Proposal to alter the starter motor's main winding to improve clearance for the teaser coils. | ||
| View original record | X.9620. TO RHC C. EFC. BY/RD2/ML.29.4.25. X.8620 - STARTER MOTOR - E.A.C.11. Referring to EFC5/T28. 4. 25., and building a third Motor, we are aware that to put in 17 S.W.G. Wire in the Teaser coils… | ||
| scan0204 | Dispatch of prints for a revised Starter Motor E.A.C. 11 Field Winding arrangement. | ||
| View original record | X 720 C. EFC. BY/RD/ML.14.5.25. X.8620 - STARTER MOTOR E.A.C. 11. We send you herewith prints shewing the latest Field Winding for the E.A.C.11 Motor. We have not arranged the main and teaser winding… | ||
| scan0205 | Observation note on the brush position of an EAC starter motor. | ||
| View original record | X 7620 18.5.25. X.8620. EAC. STARTER MOTOR. Brushes on EAC. starter motor A were observed by HEW. to be almost exactly in the static neutral position. E.F.C. EFC. | ||
| scan0206 | Diagram illustrating the brush settings for an E.d.C. motor, showing various leading angles. | ||
| View original record | X.7620 26-5-25 terminal leading by 4.4° 10.1 segs leading by 6.4° Brushes 6° advanced. (average) leading by 4.4° 10.0 segs leading by 7.8° Brush settings of E.d.C. motor (c). S.J. | ||
| scan0207 | Particulars of modifications to the EAC Starter Motor C, detailing changes to the armature and field circuit. | ||
| View original record | EFC. PC.94. X 9620 May 25th 1925. C X.8620. EAC. STARTER MOTOR C. Particulars of this motor, which was received from the shop 23.5.25, are as follows :- Armature. The commutator is modified to D.70879… | ||
| scan0208 | Requesting measurements for an EAC starter motor for inclusion in tables. | ||
| View original record | x7620 To GJ. from EFC. EFC1/T9.6.25. X.8620. EAC. STARTER MOTOR. We want for the tables :- Carcase dia. 5" Carcase length. 5.25" Carcase thickness. .3125" Weight of complete machine without pinion,… | ||
| scan0209 | Electrical experimental record sheet for an E.H.C. S. Motor B, detailing its testing and conversion to a dynamo. | ||
| View original record | ELECTRICAL EXPERIMENTAL RECORD SHEETS. E.H.C. S. Motor B X No. 8620 Date on. Location. Date off. REMARKS. Miles reading start. Miles reading finish. Miles covered. Total miles. 8-11-24 | Lab. |… | ||
| scan0210 | Instructions detailing the particulars of the 'G' motor, specifically how it differs from the 'C' machine in its armature and field circuit. | ||
| View original record | RR 238 (150 BKS.) (SH57. 29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.F.C. Order No.: PC. 97 Customer's No.: X 8620 E.A.C. S Motor G The following are particulars of the fourth motor which… | ||
| scan0211 | Instructions detailing the resistance of a main winding and noting the machine's similarity to a C machine. | ||
| View original record | RR 238 (150 BKS.) (SH57. 29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. 19 To Order No. PC 97 (2) Customer's No. Resistance of main winding is .01020 w at 22.5 C. The machine in all other respects… | ||
| scan0212 | Confirming the completion of tests on an EAC starter motor, returning the armature and carcase. | ||
| View original record | To RHC. from EFC. X820 [handwritten and underlined] EFC4/T2.7.25. X.8620. EAC. STARTER MOTOR. Herewith we return to you the armature and carcase of EAC. starter motor G, upon which we have made the… | ||
| scan0213 | The starter motor of vehicle 93-NK after 25,071 miles. | ||
| View original record | X8620 Extract from GWH1/Crn6.7.25. Report on 93-NK after 25,071 miles Starter Motor. O.K. This has functioned throughout the test quite We have had no trouble whatsoever. MADE AT CROXLEY | ||
| scan0214 | Requesting the completion of the EAC starter motor assembly. | ||
| View original record | To RHC. from EFC. X7620 EFC1/T19.8.25. X.8620. EAC. STARTER MOTOR We should be glad if you could now find it convenient to complete the assembly of the EAC. starter motor G, in accordance withe our… | ||
| scan0215 | The return of a faulty armature from a C motor and the request for a G motor for testing purposes. | ||
| View original record | To RHC. from EFC. X7620 EFC4/T26.8.25. X.8620. EAC. C MOTOR. We return to you the armature from the C motor. This armature is somewhat faulty on the drop test and sufficiently so to make it not worth… | ||
| scan0216 | Description of the winding configurations for EAC.II starter motors A, C & G. | ||
| View original record | X.7620 EFC1/T10.9.25. EAC.II STARTER MOTORS A, C & G. A. This motor originally had the teazer and main windings wound to D.70608 (winding side by side). Teazer winding was 18 SWG. On 30.1.25 we… | ||
| scan0217 | Hand-drawn diagram with plotted data points for an E.A.C. Starter Motor Armature. | ||
| View original record | 19 E.A.C. Starter Motor Armature X.7620 ? Unsteady. Watermark Text: DICKINSON'S CROXLEY 180 MADE AT CROXLEY Diagram Data (points in squares, with associated values, clockwise from bottom-left): [1]:… | ||
| scan0218 | Drill jig for a 250 HP engine connecting rod cap. | ||
| View original record | 1766 To R. from M. Copy for J. 27th January, 1916. M14/EG27116. Re 250 HP. Engine. Drill Jig for Connecting Rod Cap. E.6515. We enclose herewith print H.27113 showing the jig for drilling the .315… | ||
| scan0219 | Inspection and test results for a returned and rewound E.A.C.S. Motor C. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFC Order No.: PC 99 Customer's No.: X 8620 EAC.S. Motor C: The above motor was returned from the shop 7-9-25, with the faults on the armature and field windings… | ||
| scan0220 | Prints and sections for an E.A.C.V11 sequence starter motor. | ||
| View original record | x7620 To EFC. C. EFC. BY/RD3/ML.22.1.26. *7620 E.A.C.V11 - SEQUENCE STARTER MOTOR. FRAME & FIELD WINDING - SEC:8030. In accordance with LeC.2187, we send you herewith prints of:- D.71054 - L.O.P.… | ||
| scan0221 | Instructions for altering the epicyclic reduction gears and field windings of sequence starter motors. | ||
| View original record | To RHC. from EFC. x7620 EFC1/T23.1.26. EAC.VII. RE SEQUENCE STARTER MOTOR. X 7620/40 With reference to EY/RD5/ML22.1.26 and EY/RD3/ML22.1.26, we have in here three starter motors, the epicyclic… | ||
| scan0222 | Return and alteration of three RR sequence starter motors. | ||
| View original record | To RHC. from EFC. X7620 EFC4/T29.1.26. X7620 EAC.VII. RR. SEQUENCE STARTER MOTOR. Further to our EFC1/T23.1.26, xxx we now hand you the three starter motors, A, C and G, the epicyclic reduction gears… | ||
| scan0223 | Alterations to the epicyclic reduction gear and field windings of sequence starter motors. | ||
| View original record | Y7620 To RHC. from EFC. EFC1/T30.1.26. Y7620 EAC.VII. SEQUENCE STARTER MOTOR. Further to our EFC1/T23.1.26, we now hand you the starter motor A which, together with the starter motor G. which you… | ||
| scan0224 | Instruction regarding experimental modifications to the silent starter motor for the 9-EX model. | ||
| View original record | To RHC. from EFC. c. BY/RD. X7620 EFCI/T16.6.26. X7620 SEQUENCE SILENT STARTER MOTOR. Regarding the electrical arrangement of the starter motor required for this new set of units to be fitted to 9-EX,… | ||
| scan0225 | Production test results for EAC starter motors, specifically an armature test. | ||
| View original record | X7620 X.3604. PRODUCTION TEST RESULTS EAC. STARTER MOTORS ( TEST 1) Armature Date. | Motor No. | Amperes. | Volts. | Speed. | Speed/Volts. | Springs. | Remarks. 7-7-26 | G.2 | 26.2 | 6.0 | 1405 | 234… | ||
| scan0226 | Light test log for motor EAC. G.2., recording volts, amperes, armature speed and other metrics. | ||
| View original record | MOTOR FORM 2. LIGHT TEST OF MOTOR. Date:- 7-7-26 Motor under test:- EAC. G.2. (Main only) Volts. | Amperes. | Armature Speed. | Ohms. | Speed/Volts. | Remarks. 2.0 | 23.6 | 420 | - | 210 | Brushes… | ||
| scan0227 | Light test report for a motor, detailing performance at various voltages. | ||
| View original record | MOTOR FORM 2. LIGHT TEST OF MOTOR. Date:- 7-7-26 Motor under test:- E.A.C. G2 (Jeager) Volts. | Amperes. | Armature Speed. | Ohms. | Speed/Volts. | Remarks. 5.15 | 13.0 | Crawling | .396 | 0 | 6.0 |… | ||
| scan0228 | Torque test report for an E.A.C. G2 motor armature at crawling speed. | ||
| View original record | MOTOR FORM 3. TORQUE TEST OF MOTOR armature (at given speeds) Date:- 9-7-26 Motor under test :- E.A.C. G 2. Armature Speed:- Crawling (Main) No:- Epicyclic Reduction gear ratio:- 96 to 31. Dia. of… | ||
| scan0229 | Torque test report for an EAC G.2 motor armature at crawling speed. | ||
| View original record | MOTOR FORM 3. TORQUE TEST OF MOTOR armature (at given speeds) Date :- No:- Motor under test :- EAC. G.2 Speed:- Crawling (Main) Epicyclic Reduction gear ratio :- 96 to 31 Dia. of brake wheel:- 24"… | ||
| scan0230 | Torque test report for a motor armature at crawling speed. | ||
| View original record | MOTOR FORM 3. TORQUE TEST OF MOTOR armature (at given speeds) Date :- 8-7-26 Motor under test :- E.A.C. G.2 Speed:- Crawling (Teazer) No:- Epicyclic Reduction gear ratio :- 96 to 31 Dia: of brake… | ||
| scan0231 | Torque test report for a motor at given speeds. | ||
| View original record | MOTOR FORM 3. TORQUE TEST OF MOTOR. (at given speeds) Date :- No:- Motor under test :- EAC. G.2 armature Speed:- Crawling (Teazer) Epicyclic Reduction gear ratio :- 96 to 31 Dia. of brake wheel:- 24"… | ||
| scan0232 | Torque test results for a motor at given speeds. | ||
| View original record | MOTOR FORM 3. TORQUE TEST OF MOTOR. (at given speeds) armature Date:- 3.9.8-7-26 Motor under test :- EAC. G.2 Armature Speed:- 1500 rpm. No:- Epicyclic Reduction gear ratio:- 96 to 31 Dia. of brake… | ||
| scan0233 | Instruction sheet detailing the revised specifications and particulars for the G2 motor. | ||
| View original record | RR 238 (150 BKS.) (SH57.29-6-20.) MP 224358 X. 7620 G2 ROLLS-ROYCE LTD. INSTRUCTIONS. To EFC 22 - 7 - 1926 Order No. PC 108 Customer's No. X 8620 S. Motor G.2 The following are details of G motor… | ||
| scan0234 | Instructions detailing reduction gear specifications, gear ratios, and light test results. | ||
| View original record | RR 238 (150 BKS.) (SH57.29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. PC.108 (2) Customer's No. Reduction gear:- No of teeth on motor sun pinion . 31 " " " " annulus. 65 " " " "… | ||
| scan0235 | Instruction sheet with handwritten torque measurement data for different amperages and RPMs. | ||
| View original record | RR 238 (150 BKS.) (SH57.29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. 19 To Order No. PC.108 (3) Customer's No. Torque Crawling Teazer torque for 20 amperes. 12.5 lb ins Main torque for 100… | ||
| scan0236 | Particulars of starter motors, including pinion thread angles and differences from standard models. | ||
| View original record | To EFC. X7620 15.8.26. STARTER MOTOR PARTICULARS. X.8620/50. X.7650/20. The two S. motor pinion thread angles are 55° 8' helix. (34° 52' spiral) 45° helix. (45° spiral) The angle of the pinion thread… | ||
| scan0237 | Investigation into failures and jamming of a sequence starter motor. | ||
| View original record | Y7620 To R. From EFC. c. E. Hs. EFC2/T17.8.26. RE SEQUENCE STARTER. Y7620. x7620 In answer to your R/M13.8.26, we had already investigated the starter on the lines you suggest so far as is possible in… | ||
| scan0238 | Design and operation of a starter motor, comparing hand versus foot-operated push buttons. | ||
| View original record | To R. Contd. -2- EFC2/T17.8.26. ------------------------------------------------------ end pressure from the solenoid. It has always appeared to me that we have got to use a comparatively heavy teazer… | ||
| scan0239 | Technical report on experiments to overcome an engine starter jam by applying a higher voltage. | ||
| View original record | EFC2/T17.8.26. -3- Contd. stated, so far that does not appear to have been wrong. Since your note we have made further trials, but this time we have increased the teazer torque by the application of a… | ||
| scan0240 | Continued discussion on altering teeth and helix angles to resolve a jamming issue. | ||
| View original record | EFC2/T17.8.26. -4- Contd. a slight alteration to these teeth at the point of entry might cure the trouble entirely. To us it would appear that the increased teazer current to overcome this jam in all… | ||
| scan0241 | Chassis 12-EX (EAC.VIII) after a 6000-mile test, detailing the performance of the dynamo, starter motor, and actuator box. | ||
| View original record | X8620 Extract from CWH1/RP19.8.26. REPORT ON CHASSIS 12-EX. EAC.VIII. AFTER 6000 MILES. X.7940. Dynamo. X.8671. Dynamo J. Bearing bracket and brush holders fitted with narrower brush gear in… | ||
| scan0242 | Experimental modifications to a sequence starter, focusing on reducing the spiral angle. | ||
| View original record | X7620 To EFC. from R. c. to BJ. Wor. c. to HS. BY. R1/M1.9.26. RE SEQUENCE STARTER. X.7650. X.7620. As far as I can see the chief thing which is wrong wit about this is the spiral angle. Mr. Stent is… | ||
| scan0243 | Modifications to a starter motor engagement circuit and its physical arrangement. | ||
| View original record | -2- Contd. Regarding the steazer circuit for this arrangement apparently it should be left as originally arranged. We should first try the 17 gauge, and if this is satisfactory, try the original 18… | ||
| scan0244 | Drawing with annotations for a spring drive mechanism for a sequence starter. | ||
| View original record | Accompanies. R1/M1.9.26. SPRING DRIVE FOR SEQUENCE STARTER. New piece to epicyclic gear cage (steel) with in looking wings thus - Turn edge over. 8 rubber buffers as indicated. . Bronze pieces.… | ||
| scan0245 | Proposing a design scheme for a sequence starter unit with a diagram and operational steps. | ||
| View original record | To EFC. from R. c. to BJ. X7600 RL/M22.9.26. SEQUENCE STARTER X.7625. X.7620. In rearranging this unit we have considered the following scheme which is shewn diagrammatically hereunder to be good - In… | ||
| scan0246 | Query regarding the end pull characteristics of a starter motor armature with a corresponding diagram. | ||
| View original record | -2- Contd. (A) What is the end pull of the existing starter motor armature by teazer circuit magnetisation from one inch out to normal position, when the pull falls to nothing. We believe the curve… | ||
| scan0247 | Test results for a sequence starter, discussing armature pull and current variations with different windings. | ||
| View original record | To R. from EFC. c. BJ. AJS. X7620 EFC2/T1.10.26. X.7625A. SEQUENCE STARTER. X.7620. We have now completed the tests asked for in your Rl/M22.9.26, and attached please find a photostat copy of curves… | ||
| scan0248 | Motor performance, including main winding turns, current, and frictional effects. | ||
| View original record | -2- and 25 amperes; not using it, i.e. to 510 and 750 ampere turns respectively. In the case of the main winding the number of turns is 6½. It is difficult to say precisely to what the amount of… | ||
| scan0249 | Redesign of a sequence starter motor for an EAC chassis, proposing changes and requesting performance data. | ||
| View original record | X7625 AJSL/M9.11.26. To EFC. from AJS. c. to BJ. BY. HS. SEQUENCE STARTER. X.7625. 7620 X7652 In redesigning this starter for EAC. chassis we shall endeavour to eliminate the epicyclic reduction gear,… | ||
| scan0250 | Torque-speed characteristics, stalling conditions, and heat-up times for EAC motors. | ||
| View original record | To AJS. from EFC. c. to BJ. BY. X7620 EFCl/T13.11.26. SEQUENCE STARTER. X.7620. Answering the first portion of your AJSl/M9.11.26, please find attacged a curve of the average torque-speed… | ||
| scan0251 | Requesting the amps and efficiency data for a sequence starter to complement an existing torque and revs curve. | ||
| View original record | To EFC. from AJS. X7620 AJS3/T15.11.26. SEQUENCE STARTER X.7620. Thank you for your EFC1/T13.11.26., and the enclosed curve of torque and revs. Would you kindly let us have also for this the amps. for… | ||
| scan0252 | Efficiency curves and brake tests for a sequence starter motor. | ||
| View original record | x7620 To AJS. from EFC. EFCa/T19.11.26. -X 7625 SEQUENCE STARTER MOTOR. X 7620 As requested, we now send to you curves shewing the amperes for each torque and the efficiency for each torque, for the… | ||
| scan0253 | Proposed modifications to the sequence starter motor for a new 13 to 1 ratio. | ||
| View original record | To AJS. from EFC. c. BJ. BY. X7620 EFC1/T27.11.26. X.7625. RE SEQUENCE STARTER. X7620 We regret we have not been able in our previous note to give you the complete information asked for in your AX… | ||
| scan0254 | Alterations to a motor design, particularly concerning the 'teazer winding' and experiments on the Phantom motor. | ||
| View original record | Contd. -2- EFC/T27.11.26. copies of our calculations in this connection sometime early next week. We do not at the moment see any reason for any other alteration to the design of the motor than the… | ||
| scan0255 | Specifications and proposed testing of three experimental sequence starter motors. | ||
| View original record | To RHC. from EFC. c. BY. EY/RD. X7620 EFC2/T1.12.26. SEQUENCE STARTER MOTORS. X7625 Of the three experimental sequence starter motors :- G2, with 22.37 reduction gear and 34° 52' spiral, and pinion… | ||
| scan0256 | Specifications and test results for the revised Starter Motor A.2. | ||
| View original record | x7620 EFC. EFC4/T1.12.26. STARTER MOTOR A.2. The following are details of A motor, revised and designated A2:- This machine has the deep slot type armature taken from C machine, with the carcase,… | ||
| scan0257 | Graph showing the brake efficiency and performance characteristics of a starter motor. | ||
| View original record | STARTER MOTOR BRAKE EFFICIENCY XB 247 A2 Y-Axes (from left to right): ELECTRICAL H.P. (Scale: 0 - 4.0) EFFICIENCY (Scale: 0 - 1.0) VOLTAGE (Scale: 0 - 20) AMPERES (Scale: 0 - 250) B.H.P. (Scale: 0 -… | ||
| scan0258 | The sequence starter motor to engine reduction gear ratios. | ||
| View original record | X.7620 4.12.26. X.8620. SEQUENCE STARTER MOTOR TO ENGINE X.7620. REDUCTION GEAR RATIOS. Original total reduction 32 : 1 Second " " 30 : 1 As first arranged on chassis:- Motor epicyclic ratio 4 : 1… | ||
| scan0259 | Query about the number of turns on a starter motor's field poles. | ||
| View original record | X8620 To EFC. BY/RD5/ML6.12.26. RE E.A.C.7 - STARTER MOTOR. Referring to your verbal query why the motor had 6½ turns on the field poles instead of 4½, we would refer you to your memo - EFC3/T20.10.23… | ||
| scan0260 | Issues with a sequence starter on an EAC.7 chassis and proposed switch modifications. | ||
| View original record | To R. from EFC. c. to RJ. Wor. c. to EY. E. c. to Da. X7620 EFC2/T6.12.26. SEQUENCE STARTER. X7650 X7620 Your reference HL/M1.9.26. There has been fitted up on one of the new EAC.7 chassis a sequence… | ||
| scan0261 | Testing a spring contact switch and gear engagement mechanism to reduce operational noise. | ||
| View original record | Contd. -2- EFC2/T6.12.26. spring contact has to climb. We are arranging that contact is definitely off at the bottom of this hill but is made immediately after the spring contact reaches the top. Then… | ||
| scan0262 | Follow-up report on modifications and testing of a sequence starter, addressing backlash issues. | ||
| View original record | To R. from EFC. c. to BJ. Wor. c. E. Da. c. Hy. XJ620 EFC7/T6.12.26. SEQUENCE STARTER. X7658 Further to our EFC2/T6.12.26, having rearranged the switch to just make contact before the actuator box… | ||
| scan0263 | Standardisation of solid pole pieces for 20 HP dynamos and starter motors. | ||
| View original record | X7620 To BY/Cgh. from EFC. c. Wor. BY/RD. EFC4/T8.12.26. SOLID POLE PIECES X.4638. X.7620. X.8620. X.4132. X.5620. Referring to your By/Cgh21/G3.12.26, a standardisation sheet for solid poles for 20… | ||
| scan0264 | The use of solid versus laminated poles and armatures for various dynamo and motor models. | ||
| View original record | [Handwritten]: X7620 EFC5/T8.12.26. [Handwritten, top right]: 4 DYNAMO & MOTOR POLES AND ARMATURES Phantom Dynamo. [Handwritten]: X8660 ✓ Pole pieces are solid. An experiment is in hand with punched… | ||
| scan0265 | Specification for a starter motor for the 16-EX model, with modifications for the ERC-7. | ||
| View original record | X7620 C. EFC. BY/RD5/ML10.12.26. E.A.C.V11 - STARTER MOTOR FOR 16-EX. Referring to EFC2/T1.1226, wherein it is requested that the "C" Motor for ERC-7 be similar to the "A" motor except that the field… | ||
| scan0266 | Specification figures for an EAC sequence starter motor teazer circuit with old winding. | ||
| View original record | EFC. X7620 13.12.26. EAC. SEQUENCE STARTER MOTOR TEAZER CIRCUIT OLD WINDING (18 SWG) FIGURES. Teazer - No. of turns 36 Resistance (cold) .475 w Actuator coil - No. of turns 243. Resistance (cold) .322… | ||
| scan0267 | Alterations and details for the Phantom starter motor, including drawing references. | ||
| View original record | To BY. from AJS. x7620 AJS1/M16.12.26. c. to BJ. RG. HS. PHANTOM STARTER MOTOR. X.8620. X.7620. We send you herewith drawing LeC.2334. shewing - (1) alteration to Phantom crankcase required for… | ||
| scan0268 | Comparison table of specifications for dynamos and motors of various horsepower ratings. | ||
| View original record | X8620 16.12.26. DYNAMOS. MOTORS. | | 20 HP. | 40/50 HP. | 20 HP. | 40/50 HP. | Sequence. | |---|---|---|---|---|---| | Pole Pieces. | Laminated. | Solid. | Laminated. | Laminated. | Solid. | |… | ||
| scan0269 | Requesting an instruction be added to drawing LeC.2334 for the Phantom starter ball bearing housing. | ||
| View original record | To BY. from AJS. c. Hs. X7620 AJS2/M18.12.26. RE PHANTOM STARTER. X.7620. On drawing LeC.2334. recently sent you we should be glad if you would instruct that the housing for ball bearings is as close… | ||
| scan0270 | Request for the return of a sequence starter motor C for testing with a specific field coil arrangement. | ||
| View original record | To RHC. from EFC. X7620 EFC5/T6.1.27. SEQUENCE STARTER MOTOR. X.7620/5. C₂ We should be glad to receive back starter motor C with field coils arranged two series, two parmllel (see our note… | ||
| scan0271 | Brake test observation log for a starter motor. | ||
| View original record | X. 7620. STARTER MOTOR TESTS. FORM 1. BRAKE TEST. (OBSERVATIONS). Date:- 28-4-27 Motor under test:- R.R. Sequence. NO C2 Two series two parallel Dia. of brake wheel :- 24" Weight of pan and portion of… | ||
| scan0272 | Table of smoothed and derived results from a starter motor brake test. | ||
| View original record | STARTER MOTOR TESTS. FORM 2. BRAKE TEST. SMOOTHED AND DERIVED RESULTS. C2 2s 2f Amperes. (C) Equivalent Armature Torque. (lb-inches) (T) Speed (R.P.M.) (N). Volts. (E) E.H.P. B.H.P. Efficiency. (η) 20… | ||
| scan0273 | Starter motor brake test data sheet, showing results and related formulas. | ||
| View original record | STARTER MOTOR TESTS. FORM 3. BRAKE TEST. Φ_f and Φ_g C₂ 2s = 2p Φ_f = β T_p/C where β = 10⁵ b / 1.41 ZP Φ_g = α E/N where α = (60x10⁵xb) / ZP # b/ZP = .0061 α = .366 x 10⁵ β = 432 Table Data: Headers:… | ||
| scan0274 | Test report form detailing open circuit E.M.F., flux, and static torque tests for a starter motor. | ||
| View original record | STARTER MOTOR TESTS. FORM 4. OPEN CIRCUIT E.M.F. AND FLUX TEST FOR Φe AND STATIC TORQUE TEST FOR Φs C2 2s 2p. α and β as on Form 3. C | ee | N | ee/N | Φe | C | Ts | Ts/C | Φs | es… | ||
| scan0275 | Data table showing efficiency ratios from starter motor tests. | ||
| View original record | STARTER MOTOR TESTS. FORM 5. EFFICIENCY RATIOS. C2 2s 2p | C | ϕE | ϕe | ϕB | ϕT | ϕe/ϕE = es/E | ϕT/ϕB = Tr/Ts | ϕT/ϕE = η | ϕB/ϕe |… | ||
| scan0276 | Test data sheet recording observations from a starter motor brake test. | ||
| View original record | STARTER MOTOR TESTS. G2. G.2 FORM I. BRAKE TEST. (OBSERVATIONS). Date:- 27-VII-28 Motor under test:- Starter G2 Sequence Dia. of brake wheel:- 24" Weight of pan and portion of rope 5 lbs. 0 ozs.… | ||
| scan0277 | Brake test observations for a starter motor. | ||
| View original record | STARTER MOTOR TESTS. G.2 FORM 1. BRAKE TEST. (OBSERVATIONS). Sequence Date:- 27-VII-28 Motor under test:- Starter G.2. Dia. of brake wheel:- 24" Weight of pan and portion of rope 5 lbs. 0 ozs. and 0"… | ||
| scan0278 | Table of smoothed and derived results from a starter motor brake test. | ||
| View original record | G.2 STARTER MOTOR TESTS. FORM 2. BRAKE TEST. SMOOTHED AND DERIVED RESULTS. | Amperes. (C) | Equivalent armature Torque (Lb-Inches) (Tq) | Speed (R.P.M.) (M) | Volts. | E.H.P. | B.H.P. | Efficiency.… | ||
| scan0279 | Data sheet showing the results of a starter motor brake test, including relevant formulas. | ||
| View original record | STARTER MOTOR TESTS. FORM 3. BRAKE TEST. Φ_T and Φ_E Φ_T = β T/C where β = 10.5b / 1.41 ZP Φ_E = α E/N where α = (60x10^5xb) / Z P b/ZP = .00610 α = 36,600 β = 432.5 C. | I_T | T/C | Φ_T | E | N | E/N… | ||
| scan0280 | Test results form for starter motor open circuit E.M.F., flux, and static torque. | ||
| View original record | STARTER MOTOR TESTS. G 2 FORM 4. OPEN CIRCUIT E.M.F. AND FLUX TEST FOR Φe AND STATIC TORQUE TEST FOR Φs L and β as on Form 3. | C | ee | N | e/N | Φe | | C | Ts | Ts/C | Φs | ls |… | ||
| scan0281 | Data table showing results from starter motor tests, specifically efficiency ratios. | ||
| View original record | STARTER MOTOR TESTS. FORM 5. EFFICIENCY RATIOS. G.2. | c | ΦE | Φe | ΦB | ΦT | Φs/ΦE = es/E | ΦT/ΦB = TT/TS | Φs/ΦE = η | Φs/Φe | |---|---|---|---|---|---|---|---|---| | 20 | - | - | - | - | - | - | -… | ||
| scan0282 | Test report detailing starter motor resistance estimation at various loads for a G2 motor. | ||
| View original record | STARTER MOTOR RESISTANCE ESTIMATION AT VARIOUS LOADS. Date:- 7 Sept 1928 Motor:- G2 Back E.M.F. / speed = .01184 torque / current Table Data: Current (amperes) (C), Conductor torque (lb-ins.) (Ts),… | ||
| scan0283 | Performance characteristics graph for a starter motor, plotting Torque, Flux, and Voltage against Amperes. | ||
| View original record | STARTER MOTOR BRAKE EFFICIENCY VOLTAGE TORQUE (POUND - INCHES) FLUX PER POLE (KILOLINES) AMPERES VOLTS C2 TORQUE C2 FLUX C3 TORQUE C3 FLUX Axes Values: Voltage: 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20… | ||
| scan0284 | Decision to use punched armature plates for the Phantom chassis motor, postponing the 20 HP motor update. | ||
| View original record | To EFC. X8620 BY/RDA/ML.24.5.27. PUNCHED ARMATURE PLATES. X.8620. X.5620. X.4132 X.543. X.294. Referring to EFC3/T5.5.27 and EFC2/T23.5.27. After the receipt of EFC3/T5.5.27, the starters on the 20… | ||
| scan0285 | Electrical experimental record sheet for a Sequence Starter Motor, models A and A2. | ||
| View original record | X8620 ELECTRICAL EXPERIMENTAL RECORD SHEETS X.&No:- 8620 Sequence Starter Motor A. subsequently A₂ Date on. | Location. | Date off. | REMARKS. | Miles reading START. | Miles reading FINISH. | Miles… | ||
| scan0286 | Experimental record sheet for a sequence starter motor detailing tests, faults, repairs, and mileage. | ||
| View original record | C. Subsequently C2 ELECTRICAL EXPERIMENTAL RECORD SHEETS. X. No:- 8620 Sequence Starter motor Date on. | Location. | Date off. | REMARKS. | Miles reading Start. | Miles reading finish. | Miles… | ||
| scan0287 | Electrical experimental record sheet for tests conducted on Motor C2. | ||
| View original record | ELECTRICAL EXPERIMENTAL RECORD SHEETS Motor C2 (Contd) X. &No:- Date on. Location. Date off. REMARKS. Miles reading start. Miles reading finish. Miles covered. Total miles. 25-4-27 lab Tests to new… | ||
| scan0288 | Electrical experimental record sheet for a sequence starter motor. | ||
| View original record | X8820 G. Subsequently G2 ELECTRICAL EXPERIMENTAL RECORD SHEETS. X. No:- 8620 Sequence Starter motor Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles… | ||
| scan0289 | Electrical experimental record sheet for a Sequence Starter motor G2. | ||
| View original record | ELECTRICAL EXPERIMENTAL RECORD SHEETS X.&No:- 8620 Sequence Starter motor G2 (Contd) Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered. | Total… | ||
| scan0290 | Different design combinations and trial options for the No.1 sequence starter scheme. | ||
| View original record | To R. from EFC. c. BJ. X7620 EFC3/T11.6.27. X7650 SEQUENCE STARTER NO.1 SCHEME. X7620 We are uncertain as to whether you favour any further work being done on the No.1 scheme sequence starter. A… | ||
| scan0291 | Continued memorandum discussing further trials of a scheme and asking for a decision to proceed or cancel. | ||
| View original record | EFC3/T11.6.27. -2- Contd. considered worth while making further trials of this No.1 scheme, this is the one we should suggest to be tried in the first instance. We should be pleased to have word from… | ||
| scan0292 | Revised instructions and experiments for the Sequence Starter Scheme No.1. | ||
| View original record | RHC. To EY. BY RD. X7620 EFC1/T22.6.27. SEQUENCE STARTER SCHEME NO.1. X7620 Further to our EFC1/T14.6.27 (to RHC. only), we sent to R. a memo EFC3/T11.6.27 (copys attached), and have received back… | ||
| scan0293 | The incompatibility of fitting a No.1 Scheme Sequence Starter to a No.2 Scheme crankcase due to a change in bolt dimensions. | ||
| View original record | To EFC. c.c. to THC. c.c. to BY/RD. X.7620 BY/SS1/DB.30.6.27. X 7620. Re EAC.7. Sequence Starter. EFCl/T.22.6.27. X.7625A. Mr Coverley has raised the question of fitting the first Sequance Starter to… | ||
| scan0294 | Requesting a motor armature with a 20° spiral be substituted for one with a 5° spiral for testing on a sequence starter rig. | ||
| View original record | To RHC. from EFC. X7620 EFC2/T2.7.27. NO.1 SCHEME SEQUENCE STARTER TESTING RIG. We have duly made tests on the sequence starter motor rig with the present motor with the armature with 5° spiral, and… | ||
| scan0295 | EAC.7 Model Chassis, its starter motor, and potential rebuild into the EAC.10. | ||
| View original record | TO H-J FROM 'R. EFC.) O.C. to BJ. WOR. DA. BY. E.F. X7620 R3/M12.7.27. EAC. 7. MODEL CHASSIS. X.7620. X7650 This will ultimately be rebuilt into the EAC.10. type. Parts which can be used on Phantoms… | ||
| scan0296 | List of different schemes for sequence starter motors and gears with their part numbers. | ||
| View original record | X7620 8.8.27. Sequence starter motor. (No.1 scheme). X.7620. Sequence starter gear. (No.1 scheme). X.7650. Sequence starter motor (No.2. scheme - sliding armature). 2A. Inward. X.7625A. 2B. Outward.… | ||
| scan0297 | Note on changing the armature of a Starter Motor G2, altering its resistance. | ||
| View original record | X7620 26.6.28. X. 7620. STARTER MOTOR G2. This motor was removed from chassis 9-EX to have the armature changed for the one from motor A2 with the 20° spiral, the resistance of the armature being… | ||
| scan0298 | Brake test report for a starter motor. | ||
| View original record | MOTOR FORM 5. X. 7620 Date:- 1-12-26 No:- X.3009 - BRAKE TEST OF STARTER MOTOR. Motor under test:- A2 Dia. of brake wheel:- 24" Weight of pan and portion of rope 5 lbs. 0 ozs. Reduction of epicyclic… | ||
| scan0299 | Brake test report for starter motor model A2, detailing performance metrics under various loads. | ||
| View original record | MOTOR FORM 5. X.3009 - BRAKE TEST OF STARTER MOTOR Date:- 1-12-26 Motor under test:- A2 Dia. of brake wheel:- 24" No:- Weight of pan and portion of rope 5 lbs. 0 ozs. Reduction of epicyclic gear… | ||
| scan0300 | Test results for starter motors on a chassis under cold and hot conditions. | ||
| View original record | X7620 28.6.28. TESTS OF STARTER MOTORS ON CHASSIS. X.7620 9-EX. (4:1 Comp. ratio). Ratio 22.37 : 1. X.7625 COLD : - Volts 9.62 Amperes 94.0 Engine r.p.m. 53 Motor r.p.m. 1185 HOT : - Volts 10.4… | ||
| scan0301 | Test data for a J Motor (14-EX) under cold and hot conditions, detailing volts, amps, and RPM. | ||
| View original record | -2- 14-EX. (4 3/4 : 1 Comp. Ratio), Ratio 13 : 1. COLD :- Volts 9.3 Amperes 123. Engine r.p.m. 90 Motor r.p.m. 1170 HOT :- Volts 10.10 Amperes 108 Engine r.p.m. 110 Motor r.p.m. 1430 J MOTOR. | ||
| scan0302 | Performance characteristic graph for a starter motor, plotting various metrics against torque. | ||
| View original record | STARTER MOTOR BRAKE EFFICIENCY Oldham 4309 C.2. SPEED AMPERES VOLTS E.H.P B.H.P EFFcy ELECTRICAL H.P EFFICIENCY VOLTAGE AMPERES B.H.P R.P.M TORQUE (POUND INCHES) R.R. SEQUENCE STARTER MOTOR C.2. Two… | ||
| scan0303 | Brake test observation log for a K2 starter motor. | ||
| View original record | X. 7620 K2 STARTER MOTOR TESTS. FORM 1. BRAKE TEST. (OBSERVATIONS). Date:- 29. Aug 1928 Motor under test:- K2 Dia. of brake wheel:- 10" Weight of pan and portion of rope 0 lbs. 6 ozs. Reduction of… | ||
| scan0304 | Table of starter motor brake test results, showing smoothed and derived data. | ||
| View original record | STARTER MOTOR TESTS. FORM 2. BRAKE TEST. SMOOTHED AND DERIVED RESULTS. | Amperes. (C) | Equivalent armature torque (lb-inches) (T) | Speed (R.P.M.) (N) | Volts. (E) | E.H.P. | B.H.P. | Efficiency. (η)… | ||
| scan0305 | Data sheet documenting starter motor brake tests. | ||
| View original record | STARTER MOTOR TESTS. FORM 3. BRAKE TEST. Φr and ΦE Φr = β * T/C where β = (10.5b) / (1.41 ZP) ΦE = α * E/N where α = (60x10^5xb) / (Z P) b/ZP = .00555 α = 10^5 / 3 β = 394 C. Tr T/C Φr E N E/N ΦE 20 —… | ||
| scan0306 | Test data sheet for starter motor open circuit E.M.F., flux, and static torque tests. | ||
| View original record | STARTER MOTOR TESTS. FORM 4. OPEN CIRCUIT E.M.F. AND FLUX TEST FOR Φe AND STATIC TORQUE TEST FOR Φs L and β as on Form 3. | C | ee' | N | e/N | Φe | |-----|-----|---|-----|----| | 20 | | 30 | | 40 |… | ||
| scan0307 | Test report table showing efficiency ratios for a starter motor. | ||
| View original record | STARTER MOTOR TESTS. FORM 5. EFFICIENCY RATIOS. C | ΦE | Φe | ΦS | ΦT | ΦS/ΦE = Ls/E | ΦT/ΦS = Tr/Ts | ΦT/ΦE = η | ΦS/Φe --|---|---|---|---|---|---|---|--- 20 | — | — | — | — | — | — | — | — 30 | — |… | ||
| scan0308 | Table showing starter motor resistance estimations at various loads for the 'K' motor. | ||
| View original record | STARTER MOTOR RESISTANCE ESTIMATION AT VARIOUS LOADS. Date:- 7 Sept 1928 Motor:- K Back E.M.F./speed = .01184 torque/current | Current (amperes) (C) | Conductor Torque (lb-ins.) (T) | Back E.M.F /… | ||
| scan0309 | Blueprint graph of starter motor performance, plotting Voltage, Torque, and Flux against Amperes. | ||
| View original record | Title: STARTER MOTOR BRAKE EFFICIENCY (The word 'BRAKE' is struck through) X-Axis Label: AMPERES Y-Axis Labels: VOLTAGE, TORQUE (POUND - INCHES), FLUX PER POLE (KILOLINES) Curve Labels: VOLTS, K1 and… | ||
| scan0310 | Reliability issues and lack of power in the new 'SS' starter motor compared to the Phantom model. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. DA. c. to BY. X7620 Hsl/LG8.11.28. 'SS' STARTER MOTOR. X7625/38 One of the most anxious points we consider in connection with the 'SS' is the starter motor. The… | ||
| scan0311 | Excessive wear on a small pinion and issues with a noisy starter gear on car 14-EX. | ||
| View original record | contd :- -2- We are returning to you the small pinion off your car 14-EX. We consider, for the moderate amount of work this car has done, the wear on the pinion is excessive. We have had considerable… | ||
| scan0312 | Progress report on the 10,000-mile test of the 'SS' car, detailing starter motor adjustments and a clutch fault investigation. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to E. DA. c. to BY. X7620 S E C R E T. Hs5/LG21.12.28. 10,000 MILES ON 'SS'. X7300 X7941 We have had a telegram to say that they have completed 2300 miles on the SS.… | ||
| scan0313 | Fitting a leather cup washer to an S.S. starter motor. | ||
| View original record | To By. from G.W.H. c.c. to EFC. x7620 filing GWH.1/MJ.17.8.29. x7620. "S.S." STARTER MOTOR. --------------------- We have fitted a leather cup washer to By's suggestion to the starter motor on 21-EX… | ||
| scan0314 | Hand-drawn sketch detailing an assembly with leather cups and a steel washer for an armature shaft. | ||
| View original record | D. 72275 chamfer taken off end of armature shaft steel washer .093" .0625" 1.08" 1.2740 chamfred to fit pinion leather cups leather cup to be pressed into shape slot water serrated Ste to go over… | ||
| scan0315 | Requesting the production and testing of new parts for a 40/50 HP chassis starter motor. | ||
| View original record | x7620. To. Sft/Mr Brock. c. Mx. c. Hs. BY/RD3/N.19.8.29, Re: 40/50 HP. Chassis - Starter Motor. Will you please produce one of each of the following parts to provide a wiper for the starter motor… | ||
| scan0316 | Proposing an alteration to the lower half crankchamber to facilitate the manufacturing of the starter motor housing. | ||
| View original record | X7621 R. FROM E. SECRET E1/M29.1.29. Copy to BD. " BY. " HS. " EFC. SS. STARTER MOTOR HOUSING. X.7621 Please find herewith blueprint of LeC. 2648. shewing a minor alteration it is proposed to make to… | ||