Rolls-Royce Archives

Rolls-Royce Experimental Archives: Box ExFiles\Box 75\2\        Box Selection

IdentifierEntry
scan0001 Request for blueprints and standard parts for an Oil Level Indicator experiment on the 40/50 Chassis.
View original record X3527 RECEIVED 3 NOV BY/Shn5/DB.26.11.21. X.3527 - 40/50 CHASSIS - OIL LEVEL INDICATOR. Please receive herewith two blueprints of each of the following drawings, detailed from Scheme 418:- E.20867 -…

scan0002 Return of two oil pressure gauges mounted on a teak board.
View original record X.3896 /3527 To Hs. from Rs. Rs1/M18.8.22 We return herewith 2 oil pressure gauges mounted on a teak board, which Mr. Royce wishes you should have. Rs.

scan0003 Unsatisfactory oil level arrangement on the 40/50 HP model and the development of a new indicator.
View original record To R. from Hs. c. to CJ. c. to E. c. to Da. c. to DY. X3527 Hs6/LGS.12.22. 40/50 OIL TANK. X3527. When we fitted the 20 HP. parts to 6.EX Car, we tried to fit in the oil level indicator as used on the…

scan0004 Communication regarding a blueprint for a proposed oil level indicator on the 40/50 chassis.
View original record To Hs. X3527 BY/Shn6/DB.12.12.22. RE 40/50 CHASSIS - OIL LEVEL INDICATOR. Please receive herewith blueprint of Scheme 418, showing Proposed Oil Level Indicator for 40/50 chassis. BY/Shn,

scan0005 Note on the unsatisfactory performance of the side oil tank in cold weather.
View original record contd:- -2- oil tank. The side oil tank is not a satisfactory fitting because in cold weather the oil will not run. Springfield have discontinued using the oil tank for some time but they have not…

scan0006 Design of an oil level indicator for the 40/50 chassis, with input from Mr. Royce.
View original record To Hs. from E. c. to CJ. BY. EP. X3527 E8/M16.12.22. 40/50 CHASSIS - OIL LEVEL INDICATOR. X.3527 X.1692 Referring to scheme No.418, Mr. Royce would like you to use a circular glass tube in a slotted…

scan0007 Adoption of a filler plug and oil level gauge for gearboxes.
View original record Mr Hancock X.3527 BY. (crossed out) c. Hs. c. E. EP1/H12.1.23. re. Oil Level on Gear Boxes. √3527 X3426 Springfield have adopted a filler plug and oil level gauge as standard on the gear box of the…

scan0008 New scheme for the oil level indicator, superseding a previous one.
View original record X3527 To Hs. BY/Shn5/DB.7.2.23. RE OIL LEVEL INDICATOR. X3527 We attach herewith Scheme No.467, which supersedes Scheme No.418, in accordance with Mr Royce's wishes in memo E8/M.16.12.22. It will be…

scan0009 Sample oil gauge submitted for testing and potential business from United Brassfounders & Engineers Ltd.
View original record X3527 Hs. from ROY. ----------- ROY2/MG24.4.23 Herewith a sample Oil Guage which has been submitted by the United Brassfounders & Engineers Limited, of Ormskirk, with a view to securing our business…

scan0010 The standardisation of an oil level indicator and its effect on the wheel carrier for the 40/50 model.
View original record Hs. from R. c. to Da. X3527 R2/M17.5.23. 40/50 WHEEL CARRIER AND OIL LEVEL INDICATOR. X.3527 X.3633 Will you please get standardisation sheets going for oil level indicator instead of side tank. This…

scan0011 £248 cost to scrap material for an oil level indicator and arranging a meeting in Derby.
View original record X8527 To Hs. from BJ. BJ15/H6.6.23. Standardisation sheet for Oil Level Indicator. As it will cost £248 to scrap the material now on our hands, we would prefer to discuss this matter when we are in…

scan0012 Cover note requesting a reply regarding the standardisation of an oil level indicator.
View original record My/JW. from Hs/LG. Hs/LG7.6.23. STANDARDISATION SHEET FOR OIL LEVEL INDICATOR. We attach hereto copy of BJ15/H6.6.23. In view of BJ's remarks, will you please let us have a reply to the second…

scan0013 The standardisation of the oil level indicator, cost implications, and using up old stock.
View original record BJ. from Hs. /3527 Hs1/LG21.6.23. STANDARDISARION OF OIL LEVEL INDICATOR. Referring to your BJ15/H6.6.23. We attach a note from Cost Dept. in which they state that the £248 represents material and…

scan0014 Standardisation of an oil level indicator for the engine, replacing the side oil tank.
View original record R.R. 755 (5 H) (S.F. 29), 12-10-21) G. 8087. STANDARDISATION of CHASSIS PARTS. COMPLETED 26.6.23 X/3527 Date 23.5.23 Description of Parts: OIL LEVEL INDICATOR. Origin: To enable driver to always see…

scan0015 Standardisation sheet for an oil level indicator on the 40/50 chassis, discussing costs and material scrap.
View original record COPY. To Hs. from My/JW. My/JW2/139A/M4.6.23. STANDARDISATION SHEET No. 3527. OIL LEVEL INDICATOR - 40/50 CHASSIS. We return herewith above-noted standardisation sheet with the Costs filled in. With…

scan0016 Personal letter from Mr. Olley to Mr. Hives discussing the standardization of an oil level indicator.
View original record X3527 ROLLS-ROYCE OF AMERICA, INC SPRINGFIELD, MASS. ROLLS R ROYCE PERSONAL Oy2-W-62323 June 23, 1923. To: Mr. Hives From: Mr. Olley Oil Level Indicator Have received proposed standardization of oil…

scan0017 Application of an E.A.C. oil level indicator to the standard 40/50 model.
View original record E. from Hs. X3527 Hs2/LG7. 7. 23. OIL LEVEL INDICATOR. (X3527) Would it be possible to apply the Oil Level Indicator which we have got out from the E.A.C., to the standard 40/50 ? If it is possible,…

scan0018 Mr. Royce's dissatisfaction with the oil level indicator design for chassis 6.EX.
View original record To Hs. from E. c. to CJ. BY. X.3527 E4/M12.7.23. OIL LEVEL INDICATOR. X.3527 In reply to your memo. Hs2/LG7.7.23., would you kindly note that Mr. Royce is not satisfied with the direct reading gauge…

scan0019 Application of an E.A.C. Oil Level Indicator to the 40/50 HP model.
View original record X3527 To E from Hs. Hs1/LG14.7.23. OIL LEVEL INDICATOR. X3527 The D.O. have practically completed the scheme of applying the E.A.C. Oil Level Indicator to the 40/50 HP. They will send this on to you…

scan0020 The drawing for a 40/50 oil level indicator and how it can be fitted to an existing crankcase.
View original record To BY. from E. c. to CJ. Hs. c. to EP. Hm. X.3527 E2/M27.7.23. 40/50 - OIL LEVEL INDICATOR. X.3527 We send you herewith drawing No.LeC.1746 shewing the above. This indicator is so designed that it can…

scan0021 Forwarding a letter from Springfield concerning the topic of Oil Level and Drain Cocks.
View original record To R. from BJ. Copies to: BP. Hs. X3527 BJ21/H22.8.23. Re Oil Level and Drain Cocks. I enclose herewith a letter from Springfield, reference Oy3/W81423, received from Springfield this morning. B.J.

scan0022 Letter outlining objections to a new oil level indicator design proposed for use in America.
View original record Oy3-W-S142S August 14, 1925. Mr. Claude Johnson, Rolls-Royce, Limited, London, England. (Copy for attention of Mr. Royce) Mr. Platford) Mr. Hives) Dear Sir: Re Oil level and drain cocks Oil level We…

scan0023 Suggested changes to an oil level and draining scheme, comparing it with American practices.
View original record -2- The only changes which we suggest in the present scheme would be: (1) Operation of the cock from the right hand side of the car, outside the bonnet, this being the same side as the breather. (2)…

scan0024 Engine sump drainage plugs and filter cleaning intervals.
View original record OyS-W-S1428 -3- Cleaning of the filter is not necessary at these short intervals. Several new designs for 1924 have drain cocks actuated by con- venient handles inside the bonnet instead of the…

scan0025 Diagrams of an oil level cock and a large drain plug with a sump for collecting dirt.
View original record OIL LEVEL COCK WITH COVER AS AT PRESENT OPERATED FROM R H SIDE OF CAR AND MOUNTED ON SIDE OF CRANKCASE. LARGE DRAIN PLUG ON RH SIDE OF FILTER COVER WITH SUMP FOR COLLECTING DIRT. SYRINGING THROUGH…

scan0026 Revised drawing for the 40/50 oil level indicator to make it self-balancing and fit more crankcase bolts.
View original record To BY. from E. c. to CJ. Hs. X.3527 E3/M11.9.23. 40/50 - OIL LEVEL INDICATOR. X.3527 We send you herewith drawing No.Lec.1762., shewing the design for the 40/50 oil level indicator revised to make the…

scan0027 Explaining the preference for using a gauge over a cock to inspect engine oil levels.
View original record To OY. from R. c. to BJ. Hs. c. to EP. BY. X.3896. X3527 R1/M29.9.23. RE. ENGINE OIL LEVEL GAUGE. X.3896 In reply to your letter re. the method of inspecting the amount of oil in the engine, we and…

scan0028 Unreliability of the Goshawk 11 petrol level indicator and recommending a re-design.
View original record To R. from Hs. c. to CJ. c. to E. c. to Ds. c. to BY. c. to EP. c. to EWT.for R.R.Inc. X3596 GOSHAWK 11. PETROL LEVEL INDICATOR IN TANK. Mr. Olley has recently pointed out in his memo. OY2/G19.8.21.…

scan0029 Proposal for a simple float-type petrol level gauge for the Goshawk chassis, operated by a bevel gear.
View original record To Hs. from R. c. to CJ. c. to BY. c. to Da. c. to Wor. X/3596 R3/M3.1.22. GOSHAWK - PETROL LEVEL GAUGE. X.3596 Since we have not got a pressure system on the Goshawk, we do not want a magnetic level…

scan0030 Proposed petrol level indicator for the Goshawk 11.
View original record X3596 To Dn. from Hs. c. to CJ. c. to E. c. to BY. Hs1/LG13.1.22. PETROL LEVEL INDICATOR FOR GOSHAWK 11. X3596 We think that the petrol level indicator suggested by R. in his R3/m3. 1.22. would be…

scan0031 Progress and urgency of fitting a petrol level indicator for the Goshawk 11.
View original record Hs. from Da. X3596 Dal/M17.1.22. PETROL LEVEL INDICATOR. FOR GOSHAWK 11. X.3596 In reply to your Hs1/LG13.1.22., we have made some progress with the level indicator but Mr. Royce instructed that we…

scan0032 Robustness and potential replacement of Goshawk 11 instrument board oil pressure gauges.
View original record X3596 Exp. Dept. C. Mr Booth. BY4-P4.4.33. GOSHAWK 11. INSTRUMENT BOARD. OIL PRESSURE GAUGES. We are informed by Messrs. Dewrance & Co, that the standard 40/50 Oil Pressure Gauges will withstand an…

scan0033 Extract from a Sales Conference discussing petrol tank provisions and indicators for the Goshawk model.
View original record S/W Re Goshawk. X3816 C1/C25.7.22. The following is extract from the Minutes of the Sales Conference held on the 18th inst, at which were present BJ., C., Cx., Bt., Sp., HO., and JLE:- "Petrol Tank…

scan0034 Design and fitting of a petrol level indicator for the Goshawk model.
View original record W/S C. from Hs. X3596 Hs5/LG27.7.22. GOSHAWK - PETROL TANK. Y4266 X3596 The petrol level indicator for the Goshawk has been designed and is in production and will be fitted to the first cars. We do…

scan0035 Units of measurement (gallons vs. litres) on petrol gauges for the Goshawk II and 40/50 HP chassis.
View original record R.R. 199 (250T) (SD676 19-7-17) MP180865 X3596 sn. c. Hs. c. Roy. c. EB. BY/C18/H. 30.11.22. RECEIVED DEC 11 1922 GOSHAWK II. PETROL GAUGE. Referring to D/Snl/CH. 30.11.22. Please note that as far as…

scan0036 Experimental oil level indicator and a suggested magneto drive scheme.
View original record To E. from Hs. X3596 Hs6/LG12.12.22. OIL LEVEL INDICATOR AND MAGNETO DRIVE. X3596 X4327 Attached is a blue print showing an oil level indicator which we have fitted to one of the experimental cars. We…

scan0037 The suitability of petrol gauges fitted to 20-HP Goshawk chassis.
View original record X3596 P/W. Hs. o/ EP. Wa.5/Go.7.2.23 re 20-HP GOSHAWK - Petrol Gauges We noticed on 2 Goshawk chassis which passed through our garage on the way to Switzerland that petrol gauges were fitted on the…

scan0038 Design flaws and suggested improvements for a petrol level indicator on the Goshawk engine.
View original record X3596 To BY. from R. (At Le Canadel. c. to CJ. BJ. Wor. PN. c. to E. Da. Hs. EP. R2/M1.5.23. RE. GOSHAWKS. X.3596. RE. INDICATOR FOR PETROL LEVEL. This works extremely well and is very useful. The…

scan0039 Design and approval of a Goshawk 11 petrol level indicator dial.
View original record X.4586 X3596 To BY. from Da. c. to CJ. c. to Wor. c. to Hs,. Dal/M9.5.23. GOSHAWK 11. PETROL LEVEL INDICATOR. X.4586 X3596 We send herewith/scheme 1408 shewing the enlarged N. dial which has been…

scan0040 Suggestions for the finish of the Petrol Level Indicator Glass for the 'Goshawk 11' project.
View original record X.3596 To Wd. c. to Hs. BY/HEB5/NM. 11.5.23. "GOSHAWK 11." PETROL TANK & LEVEL INDICATOR SEC. 7080 X.4266. X.3596 We have received a note from R. in which he makes various suggestions for the finish…

scan0041 Requesting an update on fitting a reserve petrol tank to the Goshawk and 40/50 HP models.
View original record X3596 To Hs. from BJ. BJ2/H25.7.23. PETROL TANK. At the Works Derby Conference on the 21st September, 1922, a minute was made as follows:- "Reserve tank for petrol indicator. Hs. to fit up a tank like…

scan0042 To Mr. Max Pemberton regarding a fault with petrol gauge fibre washers and their replacement with cork washers.
View original record Y3596 C.J. from Hs. Hs1/LG11.9.23. PETROL GAUGE. Mr. Max Pemberton. Referring to the attached ref. BJ28/H4.9.23. There was no petrol gauge fitted to the first cars which ran 10,000 miles, although,…

scan0043 The standardisation of the Goshawk petrol level indicator on the 20 HP model.
View original record CJ. from Hs. X3596 Hsl/LG13.9.23. GOSHAWK. PETROL LEVEL INDICATOR. Referring to your CJ5/E12.9.23 attached. There was no standardisation sheet for a Petrol Gauge on the 20 HP. No standardisation…

scan0044 Fitting an untested petrol level indicator to the Goshawk-II engine, arguing against skipping the 10,000-mile trial.
View original record X3596 HS To BJ From CJ. c. to Hs. Goshawk. Petrol Level Indicator. CJ3/E14/9/23 Referring to the attached, I certainly was not aware that 4-Goshawk-II was to have a petrol gauge fitted to it which had…

scan0045 Confirming a car fitted with a 2-level tank device will be sent to Conduit Street for review.
View original record X3596 BJ. from Hs. Hs8/LG20.9.23. X3596 X4215 With reference to your BJ12/DN17.9.23. We will send the car fitted with the 2-level tank device to Conduit Street on Tuesday the 25th.inst., unless we…

scan0046 Sending a 20 HP car to London to examine and to obtain details of competitor radiators.
View original record X.3596 W/S. C. from Hs. X3596 X4607 Hsl/LG22.9.23. We are sending to London on Tuesday the 25th.inst., a 20 HP. car fitted with a 2-level arrangement for the rear tank for Sales to examine. We would…

scan0047 Advising of a 20 HP car fitted with a 2-level petrol tank device being sent to Conduit Street.
View original record BJ. from Hs. X3596 Hs5/LG24.9.23. We are sending a 20 HP. car to Conduit Street tomorrow fitted with a 2-level device for the petrol tank. This car should arrive at Conduit Street between 12 and…

scan0048 Telegram concerning a two-level tank device and the whereabouts of 'R.' for the week.
View original record (26618) EM7777 40,000M. 2/23 R.&Co.Ltd. E.1405. POST OFFICE TELEGRAPHS. Handed in at: 10.21 M. Office of Origin: London R. Words: 19 Received here at: 10.53 Office Stamp: DERBY 25 SEP 23 Message:…

scan0049 Standardisation of the petrol level indicator to improve appearance and design.
View original record R.R. 755 (10H) (SL 72 18-7-23) MP 274954B. Handwritten top: N3596 Completed 24/11/23 STANDARDISATION of CHASSIS PARTS. Description of Parts. PETROL LEVEL INDICATOR. Origin: To improve appearance and…

scan0050 Feedback on the reserve petrol tank tap placement and its proposed implementation.
View original record X3596 CJ. from Hs. Hs4/LG19.12.23. PETROL TANK. X3596 / X3888 With reference to the attc. CJ11/E18.12.23 and BJ7/H5.12.23. We fitted up a reserve petrol arrangement on a 20 HP. car and sent the car to…

scan0051 Telegauge petrol level indicator for a 20-HP chassis, suggesting its use on an experimental car despite Mr. Royce's disapproval.
View original record C. Hs. X3596 BY/C5/W.28/8/24. 20-HP. CHASSIS. PETROL TANK. ------------------ The Makers of the Telegauge have sent us a 20-HP. Petrol Tank fitted with one of their Petrol Level Indicators, similar to…

scan0052 Design and development of a petrol gauge for the car's fuel tank.
View original record To Bn. from R. Copy to CJ. " " Da. " " Hs. " " PN. X.3882 R1/G28.1.20. X.3882. RE PETROL GAUGE ETC. ON THE FUEL TANK OF CAR. (Device to determine suitability of Scale) (for proposed petrol lever…

scan0053 Alternative petrol gauge designs, including those from Sims and Weymann, and considering solutions for accuracy and visibility issues.
View original record X.3882 To R. from Bn. Copy to PN. Copy to C.J. " " Ck. " " Da. " " Hs. Bn10/W3.2.20. --- X.3882. X.3891. - RE PETROL GAUGE ON FUEL TANK. X.3451. --- With reference to R1/G28/1/20. We note that the…

scan0054 The design and feasibility of a small, thick glass window for a gauge, mentioning a ball cock scheme.
View original record Contd. -2- Bn10/W3.2.20. could be made very small and very thick. We think it should be possible to make a perfectly safe permanent joint with a glass window say, 1" in diameter and .2" thick, the…

scan0055 Different design schemes for a petrol level indicator.
View original record X.3882. Petrol Level Indicator R.R. 285A (100 T) (S.G. 643, 19-2-20) G. 2618 Contd. -2- Dal/CB3.8.20. arrangement. So that a man's gauge indicating two gallons would be a warning to him that he must…

scan0056 Continued discussion on float indicator designs for fuel tanks, mentioning an alternative scheme.
View original record Contd. -3- Dal/CB3.8.20. outside the tank and pushed in, the float ebing swivelled round a knuckled joint as it goes in, but on Fig. 3 is shewn an alternative scheme which we are disposed to favour in…

scan0057 And comparing different designs for a petrol gauge, including 'bull eye', bevel geared, and magnetic schemes.
View original record To Da. from R. c. CJ. c. E. c. By. c. Hs. X 3882 R23/H10.8.20. X.3882. X.3888. RE PETROL GAUGE. Re Bn's idea of "bull eye", this shoubd be tested to see if there is any hope of it being sufficiently…

scan0058 Testing of a glass bezel and the comparative hardness of English and French plate-glass.
View original record Contd. -2- R23H10.8.20. bezel for the glass will probably be quite successful, and should be tested. It would be nice if we could protect the glass from risk of breakage, I think, but we can leave…

scan0059 Query from Mr. Royce regarding a faulty petrol level indicator on the 40/50 HP model, suggesting the cause may be large apertures in the tank baffles.
View original record X.3882 COPY. To HS. from E. Copy to CG. " " BA. " " EFC. EA/G17/3/21. RECEIVED X.3882 X.3891 RE 40/50 H.P. - PETROL LEVEL INDICATOR. Referring to the above, Mr. Royce wishes to know if the very large…

scan0060 Letter discussing the design and placement of a petrol filler and gauge for a luggage carrier, addressing difficulties and proposing solutions.
View original record [handwritten: X.3888] Extract from R1/G28.1.20. RE LUGGAGE CARRIER ETC. [handwritten: Petrol Gauge + Filler.] [handwritten, struck through: X.3889] [handwritten: X.3888] It is in connection with such…

scan0061 Modification of the carburettor feed chamber to incorporate a filter for a new back tank on American cars.
View original record Contd. -2- Extract from R1/G28.1.20. is so very undesirable. X.2768. X.4160 In connection with this new back tank, which should be available very soon for the American cars at least, it would be…

scan0062 Sketch and improvements for a reserve fuel device in a petrol tank.
View original record X 3888 To Da. from R. Copy to CJ. " " Bn. " " Hs. " " Ck. R4/G30. 1. 20. X.3888. - RE PETROL TANK. With further reference to the petrol tank, we send herewith a sketch of the reserve fuel device. You…

scan0063 Diagrammatic drawing and explanation of a reserve fuel device.
View original record RESERVE FUEL DEVICE DIAGRAMATIC AIR PRESSURE SUPPLY PIPE UNION WOULD BE JOINED TO THIS CASTING SIMILARLY TO FUEL PIPE BUT COMMUNICATING WITH TOP OF TANK. FUEL SYLPHON TUBE, COUPLED TO VALVE STEM TO…

scan0064 Design modifications for the strainer, vent pipe, and reserve fuel supply for the 40/50 HP chassis petrol tank.
View original record X 3888 R.R. 235 A (100 T) (S.Y 846 6-8-19) G. 2460 To Da. from E. Copy to CJ. " " Bn. " " Hs. X.3889. - RE STRAINER FOR SIDE FILLER - " " Ck. X.3888. - 40/50 H.P. CHASSIS PETROL TANK. E1/G3.2.20. We…

scan0065 Proposed modifications for a trials car intended for the American company.
View original record R R 235 a (100 T) (S.F. 846 6-8-19) G. 2460. X.3555 Extract from EP7/F4.3.20. X.3719. RE TRIALS CAR FOR THE AMERICAN COMPANY? It has occurred to us that there are several other items which we consider…

scan0066 The design of a chassis petrol tank, highlighting issues with the current test model.
View original record To EX. from Hs. c. to EFC. X.3888 Hs2/LG29.6.20. X.3888 CHASSIS - PETROL TANK. With reference to your memo BY4/P29.6.20 we are quite in agreement with the above but so far we have received no design…

scan0067 The urgent adoption of a special petrol tank with specific features for the American market.
View original record From BY. c. EFC. X.3888 E C JUN 29 BY4-P29.6.30. X.3888 CHASSIS - PETROL TANK. X.368 RECD Rolls Royce, America, are very urgent in regard to the adoption of the special type of tank which Mr Royce is…

scan0068 Providing remarks on various components and systems for car 6.EX.
View original record To R. from Da. Copy to Bn. " EFC. X 3858 Dal6/CB30.6.20. X.3923. RE CAR 6.EX. With reference to some of the points on this car referred to in Hs6/LG28.6.20, we should like to make the following…

scan0069 Copy of a cable regarding the standardisation of petrol tanks and updates on shock absorbers and spring experiments.
View original record R.R. 199 (250T) (SD676 19-7-17) MF180865 X.3888 E.F.C. COPY OF CABLE. RECEIVED 1.7.20. X.3888 X.3684 ROLLS ROYCE, SPRINGFIELD. MASS. CLAUDE JOHNSON NADIN RE PETROL TANKS WITH RESERVED COMPARTMENT…

scan0070 Extract regarding proposed modifications to a petrol tank's level indicator and reserve compartment.
View original record X.3888 Extract from Dal/CB23.7.20. X3889 Re Side Petrol Filler. X.3923 X+3888. We hope, in the course of a day or two, to send you the suggestion with reference to the petrol level indicator and also…

scan0071 Modifications to petrol gauges and reserve devices, suggesting a double level device and improvements to jointing washers.
View original record To Da) from R. " By) Copy to CJ. " " Hs. " " EFC. X.3888 R1/G31.7.20. X.3888. X.3889. RE PETROL GAUGE AND RESERVE DEVICES. X.3451 Concluding that Derby were not making sufficiently quick progress with…

scan0072 Design considerations for a fuel tank, including a double level device and a petrol level indicator.
View original record R.R. 225A (100 T) (S.G. 648. 19-2-20) G. 2818 Contd. -2- RL/G31.7.20. water asat present, with a plug. This will be directly under- neath the double level device. The tank must also have a fiarly…

scan0073 Suggestions for a modified petrol tank level indicator to meet French Octroi regulations.
View original record To R. from Da. Copy to Bn. Copy to EFC. x 3888 Dal/CB3.8.20. X.4174. 3888 MODIFIED PETROL TANK LEVEL INDICATOR. X.3896. X.4159. We send herewith several suggestions for the proposed level indicator.…

scan0074 And comparing various design schemes for fuel gauges and their components.
View original record Contd. -2- Dal/CB3.8.20. arrangement. So that a man's gauge indicating two gallons would be a warning to him that he must fill up again. We think it would be very nice if we could avoid the use of…

scan0075 Alternative designs for a tank float and indicator mechanism.
View original record Contd. -3- Dal/CB3.8.20. outside the tank and pushed in, the float being swivelled round a knuckled joint as it goes in, but on Fig. 3 is shewn an alternative scheme which we are disposed to favour in…

scan0076 Schemes and difficulties related to the petrol level indicator and reserve supply valve.
View original record To R. from Da. Copy to Bn. Copy to EFC. X.3888. Da3/CB5.8.20. X!4174 X.3888. RE PETROL LEVEL INDICATOR & RESERVE SUPPLY VALVE. We have received your LeC.1267 and have instructed details to be…

scan0077 Different valve design schemes and a suggestion for a simpler, more visible valve for the driver.
View original record Contd. -2- Da3/CB5.8.20. "N" scheme 521 has a serrated knob and a somewhat smaller sylphon tube, but we thought that the size of tube shewn on "N" scheme 526 was probably more suitable. On "N" Scheme…

scan0078 Scheme for a petrol level indicator and reserve supply device.
View original record R.R. 235a (100 T) (S.G. 642. 19-2-20) G. 2618 X 3888 To Da. from R., Copy to CJ. " " Bn. " " By. " " Hs. " " EFC. E1/G5.8.20. X.4174. X.3888. RE PETROL LEVEL INDICATOR AND RESERVE SUPPLY DEVICE.…

scan0079 Examination of the Packard car's petrol tank reserve compartment system.
View original record X.3888 F.R. 235A (100 T) (S.G. 848. 19-2-20) G. 9618 To R. from Hs. c. to CJ. c. to Bn. c. to E. c. to Da. c. to By. Hs2/LGS.8.20. X. 435. PACKARD CAR PETROL TANK. X. 3888. X. 3451. We have examined…

scan0080 Cablegram from Claude Johnson outlining decisions on parts for the Springfield, Mass. plant.
View original record X.3888 X.3614. COPY OF CABLEGRAM. Xe. 6th August, 1920. Rolls-Royce Springfield Mass. THIRTYONE FIRSTLY STARTER MOTOR PETROL TANK DYNAMO AND MAGNETO STOP AND FOLLOWING DECISION ARRIVED AT IN…

scan0081 Urgent internal memo requesting the original drawing for a petrol level gauge and reserve fuel device for amendments.
View original record To DA. from E. Copy to C.J. (struck through) " " BN. (struck through) " " BY. (struck through) " " HS. (struck through) " " EPC. X.3888 URGENT. E2/G9/8/20. RE LEC.1267 - PETROL LEVEL GAUGE AND RESERVE…

scan0082 And comparing different design proposals for a petrol gauge.
View original record To Da. from R. c. CJ. c. E. c. By. c. Hs. 3888 R23/H10.8.20. X. 3882. X. 3888. RE PETROL GAUGE. Re Bn's idea of "bull eye", this shoubd be tested to see if there is any hope of it being sufficiently…

scan0083 Testing of a glass bezel and considering the hardness of English versus French plate-glass.
View original record Contd. -2- R23/10.8.20. bezel for the glass will probably be quite successful, and should be tested. It would be nice if we could protect the glass from risk of breakage, I think, but we can leave…

scan0084 Modifications to a petrol tank, level indicator, and reserve fuel device based on schemes 540 and 538.
View original record To R from DA. Copy to BN. Copy to EFC. X3888 X3888/9 Re Modified Petrol Tank. ---------- We send herewith a print of "N" Scheme 540 shewing the slight modifications to the level indicator and reserve…

scan0085 Suggesting modifications to a reserve device, top cap, and pipe routing for scheme 538.
View original record DA4/OB17-8-20 contd. As shewn on the LeC, the holes past the Reserve Device air holes some out rather small, and we suggest in Fig.5 that the annulus under the filter should be reduced a little in…

scan0086 Alternative design for a reserve fuel valve operating device, suggested by Mr. Royce.
View original record To Da. from E. Copy to CU. " " FC. " " Hs. X.388a E1/G19.8.20. X.388a. RE OPERATING DEVICE. We send you herewith sketch of alternative device suggested by Mr. Royce for operating the reserve fuel…

scan0087 Sketch of an operating device for a reserve fuel valve, with a protective cover and employing a sylphon tube.
View original record R.R. 285A (100 T) (S.G. 643, 19-2-20) G. 2618 E1/G19/8/20 X.3888a PROTECTIVE COVER WHICH MUST BE REMOVED IN A SIMILAR WAY TO A TYRE VALVE COVER TO OPERATE THE VALVE THIS COVER PREVENTS THE ACCIDENTAL…

scan0088 Issues and proposed modifications for a petrol tank filler and cap, focusing on ventilation and sealing.
View original record R.R. 199 (250T) (SD676 19-7-17) M P 180865 X3888 R1/G23.8.20. To Hs. from R. Copy to CJ. " " Wor. " " Da. " " EFC. X.3923. " " EP. X.3889. RE PETROL TANK. X.3888. On 6.EX the side filler was fitted,…

scan0089 The design and fittings of a petrol gauge and luggage carrier.
View original record Contd. -2- little bit difficult to hold a funnel as at present arranged. It would appear to want to be slightly longer and slightly more upright. In conjunction with the fitting it seems absolutely…

scan0090 Extract from a report discussing the design and production of petrol tanks for America.
View original record R.R. 199 (250T) (SD676 19-7-17) MP 180865 X 3888 Extract from By3/P27.8.20. X.3614. RE THREE CABLES RECEIVED FROM AMERICA. NUMBERED 126, 127, &128. (j) Petrol Tank. X.3687. X.3888/9. In regard tothe…

scan0091 Design suggestions for a double level device side filler and petrol gauge.
View original record X3888 To Da. from R. Copy to CJ. " " BJ. " " Wor. " " Hs. " " EFC. X.3888. " " By. X.3687. " " Ov. RE DOUBLE LEVEL DEVICE SIDE FILLER AND PETROL GAUGE. You will see that the suggestions I have made…

scan0092 Minor modifications for a petrol tank under scheme 570.
View original record R.R. 235A (100 T) (S.H. 159, 11-8-20) G. 2800 X3888 E1 /G15.9.20. To Da. from E. Copy to CJ. " " Bn. " " HS. " " EFC. " " By. X.3888. RE PETROL TANK - N. SCHEME 570. Referring to the above scheme,…

scan0093 Specifications for securing a dial and the design of a nut plate, including sketches.
View original record R.R. 225A (100 T) (S.H 159, 11-8-20) G. 2800 Contd. -2- E1/C15.9.20. securing the dial should have spherical faces. (as in sketch) for appearance (5) The nut plate for the five securing screws of the…

scan0094 The fitting of parts to a 6.EX chassis at the coach-builders, Park Ward Co.
View original record X 3868 To R. from Hs. c. to CJ. c. to Bn. c. to E. c. to Da. c. to C. Hs4/LG28.10.20. X.3923b. RE 6.EX. CAR. We have received a note from Mr. Cowen that the Park Ward Co. will be ready for 6.EX…

scan0095 Shipping an experimental car to the U.S.A. for winter testing, detailing new parts to be fitted.
View original record X3888 To R. from Hs. c. to C.J. c. to Mm. c. to K. c. to Da. c. to Sy. X.3916. EXPERIMENTAL CAR FOR U.S.A. X.3764a/b. Arrangements have been made so that this car will be shipped on the 20th inst. The…

scan0096 The fitting of new parts to the 6.EX car at Park Wards, Willesden.
View original record R.R. 855a (100 T) (S.H. 159. 11-8-20) G. 2500 X 3888 To R. from Hs. C. to CJ. C. to Bm. C. to E. C. to Ds. Hs2/LG13.11.20. X. 3923a/b. RE 6.EX. Car. ---------- ---------- We took 6.EX Car to Park…

scan0097 Extract from a report on the petrol level indicator, syphon tubes, and wiring arrangement.
View original record X.388 P To R. from Hs. Extract from Hs2/LG15.11.20. X.3918. RE VISIT TO AMERICA. X.3764. X.3888/9. The R.R. Petrol Level Indicator is working very nicely; it is possible to read it from 1 gallon, also…

scan0098 Two proposed schemes for fitting the rear number plate and lamp on a chassis with a rear-mounted petrol tank.
View original record To BV from DA. Copy to HS (1 print). Copy to FH (1 print). Copy to MAC(1 print). Copy to EFC. X3888 DA6/CB1-12-20. ---------------- X.3923a RE CHASSIS 6EX. X 4152 X.3888 Please receive herewith two…

scan0099 Experimental parts fitted to chassis 4.EX.
View original record R.R. 286A (100 T) (S.H 159. 11-8-20) G. 2800 X 3888 To EFC. from RHC. c. to Ms. RHC4/LG2.12.20. X.3764. RE CHASSIS 4.EX. Will you kindly note, the following experimental parts have been fitted to the…

scan0100 Problems with a petrol level indicator, including erratic readings and fuel leaks from the dial.
View original record To R. from Hs. c. to CH. c. to Bn. c. to E. c. to Da. c. to By. c. to EP. X3888 Hs6/LG10.2.21. X.3888. PETROL LEVEL INDICATOR. We had trouble with the petrol lever indicator fitted to 4.EX Car whilst…

scan0101 Continuation of a document discussing the arrangement of standard American petrol gauges.
View original record Contd. -2- Hs6/LG10.2.21. for any leakage of petrol to get on to the dial. All the standard American gauges are arranged this way. Hs. R.R. 235a 100(T) (S.H. 798. 10-12-20) G. 2948

scan0102 Delays on 'R' series materials pending potential improvements from the Experimental Department.
View original record X3888 Extract from By10/H 11.2.21. EP. from By. X.2565. "R" SERIES MATERIAL. The following sections have been held up in view of the possibility of the Experimental Dept. wishing to bring in…

scan0103 6.EX car, detailing a fix for the petrol indicator and parts needed for completion.
View original record X.3888. To R. and E. from Hs. c. to CJ. c. to Bn. and BY. c. to Da. c. to EWT. for R.R.Inc. X.3923 X.3888 X.4215 RE - 6.EX CAR. We have got this car from the Coachbuilders - it looks very nice and the…

scan0104 Mr. Royce's suggestions for modifying the petrol level indicator and spare fuel device.
View original record X 3888 To Da. from E. Copy to CJ. " " Bn. " " Hs. " " EFC. X.3888. RE PETROL LEVEL INDICATOR AND SPARE " " By. FUEL DEVICE. Referring to N. scheme 540, it is feared that with the maximum body it will…

scan0105 Design alterations for a tank's standpipe flange, lid, sump, and drain plug, accompanied by sketches.
View original record Contd. -2- It is assumed that the complete stand pipe flange assembled with screws and screwed ring will be twisted bodily into the screwed flange on the tank. Referring now to the lid carrying the…

scan0106 With a sketch detailing design modifications to a fuel indicator, needle valve, and filter.
View original record Contd. -3- E4/G28.8.20. indicator when it is being withdrawn from the tank. Mr. Royce would like you to allow 2" laterally between the centres of the indicator and the stand pipe, each device being 1"…

scan0107 Continued page detailing the construction of a copper-plated cork float and Mr. Royce's opinion on petrol tank baffles.
View original record Contd. -4- E4/G28.8.20. The float is of cork copper plated, and care should be taken that the copper-plating forms a petroleproof joint with the end flanges which secure the cork float on the tube.…

scan0108 Alternative design scheme for the petrol gauge and reserve supply tank for the 40/50 chassis.
View original record X.3888a Extract from By/EL2/EF1.10.20. X.3888. - 40/50 CHASSIS. PETROL GAUGE & RESERVE SUPPLY TANK - SEC. 70aO. X 3888a The following prints are of an alternative scheme to the design embodying the…

scan0109 Inadequacy of luminous paint on instrument needles and proposing a dedicated instrument board light as a solution.
View original record Da/Ev. from Hs. c. to Sp. Y3888 Hs3/LG28. 5. 23. RE. INSTRUMENT BOARD LIGHT. X 3615 / X.3888 We have so far been unable to obtain a satisfactory luminous paint for the needle on the petrol level…

scan0110 Design and location of a reserve petrol tank tap.
View original record CJ. from Hs. V3888 Hs4/LG19.12.23. PETROL TANK. X3596 / X3888 With reference to the attc. CJ11/ElS.12.12.23 and BJ7/H5.12.23. We fitted up a reserve petrol arrangement on a 20 HP. car and sent the car…

scan0111 Standardisation of the reserve petrol arrangement on the 20 and 40/50 models.
View original record X3888 To Hs. from CJ. re Petrol Tank. CJ3/E28/12/23 Referring to your Hs4/LG19/12/23, do not bother about the tap on the instrument board. Please endeavour to make the reserve petrol arrangement…

scan0112 Hand-drawn schematic for a pressure-based petrol level measuring device.
View original record COPY X.3891 R1/4 28.1.20 ABOUT 4" GALLONS 16 14 12 10 8 6 4 PETROL TANK BY DELIVERING A SMALL QUANTITY OF AIR WITH A GENTLE STROKE OF THE PUMP THE U TUBE IS MADE TO INDICATE THE DIFFERENCE IN PRESSURE…

scan0113 Proposal for a petrol gauge that measures the fuel level based on air pressure differentials.
View original record X.3891. Extract from R1/G28.1.20. X.3882. RE PETROL GAUGE ETC. ON THE FUEL TANK OF CAR. X.3891. A long time ago I heard of a suggestion of telling the amount of petrol in the back tank by the…

scan0114 Technical discussion on the design and implementation of a petrol gauge for a fuel tank.
View original record X3891. To R. from Bn. Copy to PN. Copy to CJ. " " Ck. " " Da. " " Hs. Bn10/W3.2.20. X.3882. X.3891. - RE PETROL GAUGE ON FUEL TANK. X.3451. (Due to head of Petrol) With reference to R1/G28/1/20. We…

scan0115 The design and manufacture of a small, thick glass window for a gauge.
View original record Contd. -2- Bn10/W3.2.20. could be made very smalk and very thick. We think it should be possible to make a perfectly safe permanent jointmwith a glass window say, 1" in daimeter and .2" thick, the…

scan0116 40/50 HP petrol level indicator and the effect of tank baffles on its reading.
View original record X.3891 To Hs. from E. c. to CJ. c. to Da. c. to EFC. --- [horizontal line] X 3882 [text is crossed out] X.3891 RE 40/50 PETROL LEVEL INDICATOR. E4/G17.3.21. Referring to the above, Mr. Royce wishes to…

scan0117 The design and function of a magnetic petrol gauge, clipped from 'Motor' magazine.
View original record R.R. 235A (150 H) (S.A. 209. 25-1-15) G. 0900. 7984 Motor 17:3:14 A MAGNETIC PETROL GAUGE. A very general form of petrol gauge for showing the amount of petrol which may be at any time in the tank is…

scan0118 Letter from Simms Motor Units Ltd regarding the testing of a magnetic gauge.
View original record ON WAR-OFFICE ADMIRALTY-AND COLONIAL-OFFICE LISTS. SIMMS MOTOR UNITS LTD [Left Logo] UNITS TRADE MARK TELEGRAMS: "SIMOTUNIT, LONDON." TELEPHONE REGENT 2760. A.B.C. 5TH EDITION & WESTERN UNION CODES.…

scan0119 Advertising brochure for 'Triumph' magnetic gasolene tank gauges by the Boston Auto Gage Company.
View original record [Left Page] OUR GUARANTEE WE guarantee all moving or working parts of any "Triumph" gage against wear (not abuse) for a term of two years. We guarantee the magnetic principle of the gage for a term of…

scan0120 Plate showing the installation of various models of 'Triumph' magnetic gasoline tank gages manufactured by the Boston Auto Gage Company.
View original record PLATE SHOWING INSTALLATION OF VARIOUS MODELS OF "TRIUMPH" MAGNETIC GASOLENE TANK GAGES MANUFACTURED BY BOSTON AUTO GAGE COMPANY, BOSTON, MASS., U. S. A. Fig.1. Fig.2. Fig.3. Fig.4. Fig.5. Fig.3a S B…

scan0121 Letter from Simms Motor Units Ltd. regarding a sample magnetic petrol gauge sent for testing purposes.
View original record ON WAR-OFFICE, ADMIRALTY-AND-COLONIAL-OFFICE LISTS. SIMMS MOTOR UNITS LTD. ENGINEERS & TRADERS. 191, WARDOUR STREET, OXFORD STREET. MAGNETOS VULCANIZERS ELECTRIC HORNS SPARKING PLUGS MAGNETO REPAIRS…

scan0122 Letter from Simms Motor Units Ltd regarding the availability of six SD 6 magnetos and a Magnetic Petrol Gauge sample.
View original record ON WAR-OFFICE ADMIRALTY-AND COLONIAL-OFFICE LISTS. SIMMS MOTOR UNITS LTD [LOGO: UNITS TRADE MARK] TELEGRAMS: "SIMOTUNIT, LONDON." TELEPHONE REGENT 2760. A.B.C. 5TH EDITION & WESTERN UNION CODES…

scan0123 Correspondence regarding sending a sample Simms Magnetic Petrol Tank Gauge for testing.
View original record Wor/Mcr17/L14814. Re Simms Magnetic Petrol Tank Gauge "Triumph" X.984 Da. 14-8-14. Na.c. We send herewith a sample Petrol Gauge together with booklet dealing with same. We shall be glad if you will…

scan0124 Letter to Simms Motor Units acknowledging receipt of a magnetic petrol gauge for testing.
View original record Wor/Mcr8/L15814 x982/ August 15th. 1914. Messrs Simms Motor Units Ltd., 191, Wardour Street, Oxford Street, LONDON. W. Dear Sirs, We beg to acknowledge the receipt of Magnetic Petrol Gauge, which we…

scan0125 Letter from Simms Motor Units Ltd regarding a follow-up on sample petrol gauges.
View original record ON WAR-OFFICE ADMIRALTY-AND COLONIAL-OFFICE LISTS. SIMMS MOTOR UNITS LTD ENGINEERS & TRADERS. 191, WARDOUR STREET, OXFORD STREET. LOGO: UNITS TRADE MARK TELEGRAMS "SIMOTUNIT, LONDON" TELEPHONE REGENT…

scan0126 Letter to Simms Motor Units, Ltd. concerning a delay in testing a petrol gauge due to the dislocation of trade.
View original record WOR/Mcr26/T30914. *9821 30th September, 1914. Messrs. The Simms Motor Units, Ltd., 191, Wardour Street, Oxford Street, L O N D O N. W. Dear Sirs, Your Ref: FRS/EW. With reference to your letter of…

scan0127 Letter from Simms Motor Units Ltd. concerning the testing of a sample petrol gauge.
View original record ON WAR-OFFICE ADMIRALTY-AND COLONIAL-OFFICE LISTS. X984 SIMMS MOTOR UNITS LTD ENGINEERS & TRADERS. 191, WARDOUR STREET, OXFORD STREET. TRADE MARK TELEGRAMS: "SIMOTUNIT, LONDON." TELEPHONE REGENT 2760.…

scan0128 Experimental instruction sheet detailing modifications and part removals from chassis 2300.
View original record INSTRUCTIONS. Mr. Mercer. 22.10.14. Re. Chassis 2300. EXPERIMENTAL. COPY The following experiments have been carried out on this car., Ionides clutch experiement. X317. Old type torque tubes fitted…

scan0129 The 'Triumph' magnetic petrol tank gauge.
View original record From Exp. Dept. Copies to: J. H. Da. Na. Wor/Hy10/L7115 January 7th. 1915. Report on "Triumph" magnetic Petrol Tank Gauge. X.984 This gauge is to indicate the amount of petrol in the tank. It consists…

scan0130 The suitability of a gauge, noting its lack of accuracy and small, hard-to-read dial.
View original record Wor/Hy10/L7115. Sheet. 2 by any means accurate and I do not see that it can be made to really work accurately as I should say that the success in working depends on the liberal clearances in the…

scan0131 Request to obtain a sample of a 'Magnetic Petrol Indicator' from Mr. F.R. Sims or an alternative magnetic indicator.
View original record X.4159. To O.O. from Da. Da6/CB30.10.19. X.4159. X 3896 Some time ago, I think just after the War began, we had a sample petrol level indicator from Mr. F.R. Sims, I think it was called the Magnetic…

scan0132 Request to order an additional Magnetic Petrol Indicator with a side-mounted dial from Simms Motor Units Co.
View original record To O.O. from Da. X.4159. Da5/CB31.10.19. With reference to our request that you should order a Magnetic Petrol Indicator from Simms Motor Units Co., we now think that in addition to the Indicator…

scan0133 The order of a No.2 Magneto Petrol Gauge and a Sims 'J.R' Side Gauge.
View original record x.4159. To O.O. from Da. Da9/CB5.11.19. Will you please order No.2. Magneto Petrol Gauge, and also a Sims "J.R" Side Gauge. Da. EXTRA R.R. 235B (50T) (S) C. 759. 24-8-20 C. 2630

scan0134 Letter from Simms Motor Units Ltd. regarding the supply and pricing of magnetic petrol gauges.
View original record R.R. 285A (100 T) (S.G. 648. 19-2-20) G. 2618 X.4159 SIMMS MOTOR UNITS LTD. Percy Buildings, Gresse Street, Rathbone Place. London W. FS/MB. 7th November. 1919. Messrs. Rolls-Royce Ltd., Nightingale…

scan0135 Letter to Simms Motor Units Ltd. regarding the testing of gauges and requesting a quote for a distance-reading gauge.
View original record R.R. 235A (100 T) (S.G. 643, 19-2-20) G. 2618 X.4159 Reference - Dal/CB13.11.19. November, 13th, 1919. Messrs. Simms Motor Units ltd., Percy Buildings, Gresse Street, Rathbone Place, LONDON.W. Dear…

scan0136 Letter from Simms Motor Units Ltd. regarding the supply of a petrol gauge based on a sketch.
View original record R.R. 285A (100 T) (S.G. 643, 19-2-20) G. 2618 x.4159 SIMMS MOTOR UNITS LTD. Percy Buildings, Gresse Street, Rathbone Place. LONDON. W. 20.11.19 JG/VIC. Messrs. Rolls-Royce Ltd., Nightingale Road,…

scan0137 Letter from Simms Motor Units regarding the despatch and calibration of two petrol gauges.
View original record X.4159 SIMMS MOTOR UNITS LTD. PERCY BUILDINGS. Gresse Street, Rathbone Place, LONDON . W. 4th December, 1919. JG/VIC. MESSRS. Rolls-Royce Ltd., Nightingale Road, Derby. Dear Sirs, Ref:-…

scan0138 Letter to Simms Motor Units Ltd. regarding the testing of two petrol gauges on an experimental car.
View original record X4159. Reference - Da7/CB10.12.19, December 10th, 1919. Messrs, Simms Motor Units Ltd., Percy Buildings, Gresse Street, RATHBONE PLACE? LONDON.W. Dear Sirs, We thank you for your letter of the 4th…

scan0139 Two petrol gauges from Simms Motor Units Ltd. and the subsequent need for an official order.
View original record X.4159. To O.O. from Da. Da10/CB10.12.19. In reply to your Wd/W1/R8.12.19, the two petrol gauges from the Simms Motor Units Ltd., were, I think, sent us at my request. I think it would be as well if…

scan0140 Interim use of a magnetic petrol gauge for special orders, pending the perfection of a standard in-house design.
View original record R.R. 285A (100 T) (S.G. 848, 19-2-20) G. 2618 [Handwritten: X.4159.] To Da. from Bn. Copy to By. " " Sn. Bn20/W19.1.20. [Handwritten: X.4159] Re Petrol Gauges. - For Present Standard Chassis to…

scan0141 Proposal to use Simms Magnetic Petrol Gauges as a temporary solution until a standard arrangement is ready.
View original record R.R. 285A (100 T) (S.G. 648, 19-5-20) G. 2618 X.4159. To By. from Da. Copy to HO. Da10/CB20.1.20. X.4159. RE PETROL GAUGES. X 3896 As Sales Department are constantly being asked to recommend or fit a…

scan0142 Letter to Simms Motor Units Ltd. regarding the supply of vertical magnetic petrol gauges for customer tanks.
View original record x 4159. Reference - Da9/CB20.1.20. January, 20th, 1920. Messrs. Simms Motor Units Ltd., Percy Buildings, Gresse Street, RATHBONE PLACE. LONDON.W. Dear Sirs, x 4159. RE PETROL GAUGES.…

scan0143 Letter from Simms Motor Units Ltd. acknowledging an order and advising of a delivery delay.
View original record X.4159 SIMMS MOTOR UNITS LTD. Percy Buildings, Gresse Street, RATHBONE PLACE. LONDON.W. FS/GH. 29th Jan. 1920. Messrs. Rolls-Royce Ltd., Nightingale Road, Derby. Dear Sirs, We beg to acknowledge the…

scan0144 Request to the Stores department for the loan of a Simms Petrol Lever Indicator for the Experimental Drawing Office.
View original record X.4159. To Stores. -------- Da/Stt4/EF13.2.20. X.4159 Simms Petrol Lever Indicator. ---------------------------------- We understand that you have recently received about 10 of these fittings from the…

scan0145 Sending original drawings for the Simm's Petrol Indicator for the 40/50 Chassis and requesting production.
View original record X.4159 To By. from Da/Stt. Da/Stt12/EF26.2.20. X.4159. 40/50 Chassis - Simm's Petrol Indicator in Petrol Tank. Section 7080. X 3457 We send you herewith original drawings of N. 3651. Arrgt. of Petrol…

scan0146 Faulty Simms magnetic petrol gauges which show 'EMPTY' with two gallons remaining, a serious issue for cars in France due to the 'Octroi' tax system.
View original record Order. Office. (Ms) c. Da. c. Hs. c. EP. X.4159. ByT/H. 23.6.20. X.4159. RE SIMMS MAGNETIC PETROL GAUGES. We find that the Petrol Gauges which are being supplied by Messrs Simms for our Tanks are…

scan0147 Faulty tank gauges from the Simms Company and proposing a design solution.
View original record Contd. -2- By 7/H 23.6.20. up with the Simms Company, and find out whether the gauges supplied were supposed to be suitable for our tank, when fitted in the manner described by Da. We are distinctly…

scan0148 Response concerning the accuracy and intended use of the Simms Magnetic Petrol Gauge, specifically for 'Octroi' purposes in France.
View original record To BY. from Da. c. to Hs. c. to EP. c. to Ms. COPY. X.4159 8.FC E C JUN 26 1920 Da6/CBS/4.6.20. X.4159 RE SIMMS MAGNETIC PETROL GAUGE RECEIVED X.1798 In reply to your BY7/H23.6.20, we never intended…

scan0149 Supply, return, and fitting of Simms Magnetic Petrol Gauges, also noting a design issue.
View original record X.4159 BY. C. to HS. C. to DA. 96FE COPY. EP15/F24.6.20. X.4159 RE. SIMMS MAGNETIC PETROL GAUGES. X.3451 With reference to the above, we have noted the contents of your BY7/H23.6.20 and Mr. Hives'…

scan0150 The accuracy of Simms Magnetic Petrol Gauges and a proposal for a more intelligible marking system.
View original record X.4159 To BY. from Hs. c. to Sa. c. to EF. RFe HsL/LG.24.6.20. 2 X.4159 RE SIMMS MAGNETIC PETROL GAUGES. X.1798 X.3481 We do not consider that the Simms Magnetic Petrol Gauges are sufficiently…

scan0151 Provision of a Simms petrol gauge for use with French Octroi tax regulations.
View original record X.4159 To BY. from DA. c. to Sn. c. to Hs. R.F.C. COPY. DA7/CB28.6.20. PETROL TANK. X.4159. RE GAUGE ON TANK SHEWING AMOUNT OF PETROL PRESENT. Replying to your BY2/P28.6.20 we will go into the…

scan0152 Need for and design of a new petrol gauge, the Simms Magnetic Gauge, for increased accuracy.
View original record Da. from BY. c. Hs. RPC X.4159 COPY. BY2/P28.6.20. X.3487 X.1798 PETROL TANK. RE GAUGE ON TANK SHOWING AMOUNT OF PETROL PRESENT. Referring to Da6/CB24.6.20., the question of fitting the gauge…

scan0153 Suggestions for a modified petrol tank level indicator to comply with French regulations.
View original record To R. from Da. Copy to Bn. Copy to EFC. X-4159 Dal/CB3.8.20. X.4174. MODIFIED PETROL TANK LEVEL INDICATOR. X.3896. We send herewith several suggestions for the proposed level indicator. Since we took…

scan0154 Letter received from The Simms Motor Units Ltd. about a petrol indicator for a 14 3/4 gallon tank.
View original record R.R. 235a (50 T) (S.H. 986, 19-2-21) G. 3000 X.4159 Hs. from U.O. Wd/Dnl/HP199 21. 19th Sept.1921. We attach copy of a letter received from The Simms Motor Units Ltd., regarding Petrol Indicator for…

scan0155 Letter from Simms Motor Units regarding the calibration of a petrol indicator for a 14 3/4 gallon tank.
View original record R.R. 235A (100 T) (S H. 798. 10-12-20) G. 2947 COPY OF LETTER FROM:- THE SIMMS MOTOR UNITS (1920) LIMITED. PERCY BUILDINGS, GRESSE St, RATHBONE PLACE, LONDON.W.1. JG/GH. 15th Sept. 1921. Messrs.…

scan0156 Failures with the 'Simms' petrol level indicator due to condensation and rust.
View original record Wd. from Hs. x4159 Hs2/LG19.9.21. "SIMMS" PETROL LEVEL INDICATOR. We should like you to bring the following points to the notice of the makers of these Indicators. We have had failures with this type…

scan0157 Quoting a letter from Simms Motor Units regarding issues with their petrol level indicators.
View original record R.R. 235c (10 F.) (S.H. 988. 22/2/21.) Bm. 59887S. Hs. from Wd. X4159 Wd4/NJ29.9.21. Simms Petrol Level Indicator. In reply to yours Hs2/LG19.9.21, we are this morning in receipt of a letter from…

scan0158 Unsuitability of the Simms Petrol Level Indicator and the need to source an alternative moving arm type gauge for the Goshawk 11 model.
View original record To BY. from Hs. c. to Wd. X4159 Hs1/LC4.10.21. SIMMS PETROL LEVEL INDICATOR. X4159 X3896 We do not consider that the Simms type of Petrol Level Indicator good enough for our cars. Also the fact of it…

scan0159 Letter to O.S. Speedometer Co. about experimentally testing a new dashboard petrol gauge.
View original record X4039 Expl: Dept: Hs/Rm2/LG. 9th. Aug. 1926. The O.S. Speedometer Co., Albert Place, Tottenham Court Rd., London W.1. Dear Sirs, We have noticed with interest the new type of Dashboard reading petrol…

scan0160 Letter from O.S. Speedometer Co. Ltd. regarding a dashboard reading petrol gauge.
View original record O. S. SPEEDOMETER CO. LTD. 4-6, Alfred Place, Tottenham Court Road, London, w.c.1. Code used: BENTLEY'S A.B.C. 5th EDITION. SPEEDOMETERS, MILEAGE RECORDERS, MOTOR CLOCKS, TACHOMETERS, PETROL GAUGES,…

scan0161 Letter to The O.S. Speedometer Co Ltd. providing blueprints for a tank and dashboard and requesting a lead time.
View original record X4039 Hs/Rm4/T. 23rd August, 1926. Messrs. The O.S. Speedometer Co Ltd., 3-6, Alfred Place, Tottenham Court Road, London, W.C.1. Dear Sirs, With reference to your letter of the 10th inst. herewith…

scan0162 Letter from The O.S. Speedometer Co. Ltd. acknowledging receipt of blueprints and confirming the preparation of gauges.
View original record Y4039 THE O. S. SPEEDOMETER CO. LTD. 3-6, Alfred Place, Tottenham Court Road, London, W.C.1. Telephone: MUSEUM 1602. Cables and Telegrams: OSPEEMETER WESTCENT, LONDON. Reference: PP/EM/1456. Code…

scan0163 Requesting further information on when parts are likely to be ready.
View original record HS/Rm/rpe 13.9.26 With reference to this letter, can you give us any further information as to when the parts are likely to be ready FOR ROLLS-ROYCE, LIMITED.

scan0164 Letter to The O.S. Speedometer Co. Ltd. requesting an update on when parts will be ready.
View original record X4039 Hs/Rm2/LG. Expl: Dept: 13th. Sept. 1926. The O.S. Speedometer Co.Ltd., 3 - 6 Alfred Place, Tottenham Court Rd., London, W.C.1. Dear Sirs, With reference to your letter of the 24th.ult. Can you…

scan0165 Letter from The O.S. Speedometer Co. Ltd. requesting a petrol tank for testing a rear tank petrol gauge.
View original record THE O. S. SPEEDOMETER CO. LTD. 3-6, Alfred Place, Tottenham Court Road, London, W.C.1. Telephone: MUSEUM 1602. Cables and Telegrams: OSPEEMETER WESTCENT, LONDON. Reference: PP/EM/1570. Code used:…

scan0166 Photograph of an O.S. Speedometer Co. fuel gauge measuring in gallons, with its sensor unit.
View original record PATENTED O S. 0 5 10 15 20 O.S. SPEEDOMETER CO LD 3, GALFRED PLACE, LONDON. W.C.1 Gallons

scan0167 Letter to The O.S. Speedometer Co. Ltd. regarding the delayed despatch of a tank.
View original record X4039 Expl: Dept: HS/Rnl/LG. 17th. Sept. 1926. The O.S.Speedometer Co. Ltd., 3 - 6 Alfred Place, Tottenham Court Rd., London W.C.1. Dear Sirs, With reference to your letter of the 15th. inst. At the…

scan0168 Fitting of a new 'O.S.' Petrol Indicator from Ateliers Seignol.
View original record "Hs" Derby. X4039 Ps13/JP.23/9/26 RE "O.S." PETROL INDICATOR. It appears you have been in correspondence with the ATELIERS SEIGNOL, 17, Rue Duret, Paris, or the "OS" Speedometer people in London…

scan0169 O.S. petrol indicator, declining to modify the petrol tank and suggesting the gauge be modified instead.
View original record Ps. from Hs/Rm.. x4039 Hs/Rm2/LG27.9.26. RE. O.S. PETROL INDICATOR. With reference to Ps13/JP23.9.26. We do not think there is any possibility of us modifying our petrol tank to suit this gauge as…

scan0170 Letter to O.S. Speedometer Co. Ltd. regarding the modification of tank baffles for a gauge.
View original record X4039 Expl: Dept: Hs/Rn4/LG. 11th. Oct. 1926. The O.S. Speedometer Co.Ltd., 3 - 6 Alfred Place, Tottenham Court Rd., London W.C.1. Dear Sirs, Since our communication of the 17th.ult. we have heard…

scan0171 Letter from The O.S. Speedometer Co. Ltd. regarding a dispute over fitting their gauge to a fuel tank.
View original record X4039 THE O. S. SPEEDOMETER CO. LTD. 3-6, Alfred Place, Tottenham Court Road, London, w.c.1. Telephone: MUSEUM 1602. Cables and Telegrams: OSPEEMETER WESTCENT, LONDON. Code used: BENTLEY'S A.B.C. 5TH…

scan0172 Letter discussing the modification and testing of a tank and gauge.
View original record We are today forwarding to you one of our tanks. We should be obliged if you could fit the gauge to this tank & return it to us. Realising your difficulty since visiting the Paris salon, we agree that…

scan0173 Promotional leaflet for O.S. Automatic Petrol Gauges, for both visible filler-caps and dashboard mounting.
View original record O. S. Automatic Petrol Gauge FOR Visible Filler-Cap. Petrol Level Indicator for front and rear tanks which have a visible filler-cap. The O. S. Gauge takes the place of the filler cap of the petrol…

scan0174 Sales leaflet for the O.S. Automatic Petrol Gauge for under-bonnet tanks.
View original record A pressure of 1 1/2 to 7 ozs. It functions by means of a pressure of 1 1/2 to 7 ozs., obtained by the weight of a column of mercury of the same height as the liquid to be measured. This weight is…

scan0175 Request to forward a petrol tank from car 12-EX to the O.S. Speedometer Co. Ltd.
View original record To RHC. from Hs/Rn. X4039 Hs/Rm2/LG20.10.26. O.S. PETROL GAUGE. Will you please forward the petrol tank, yesterday removed from 12-EX car to:- The O.S. Speedometer Co.Ltd., 3-6 Alfred Place, Tottenham…

scan0176 Letter to O.S. Speedometer Co. Ltd. regarding the modification of a tank to fit their gauge.
View original record X4039 Expl: Dept: Hs/Rml/LG. 20th. Oct. 1926. The O.S. Speedometer Co. Ltd., 3-6 Alfred Place, Tottenham Court Rd., London W.C.1. Dear Sirs, Replying to your letter of the 15th. inst. We are today…

scan0177 Letter from The O.S. Speedometer Co. Ltd. regarding the fitting of a petrol gauge to a tank.
View original record X4039 THE O. S. SPEEDOMETER CO. LTD. 3-6, Alfred Place, Tottenham Court Road, London, w.c.1. Code used: BENTLEY'S A.B.C. 5TH EDITION. Reference: PP/EM/1792. SPEEDOMETERS, MILEAGE RECORDERS, MOTOR…

scan0178 Brochure for O.S. Automatic Petrol Gauges, detailing a visible filler-cap model and a dashboard-mounted rear tank model.
View original record Page 1: O. S. Automatic Petrol Gauge FOR Visible Filler-Cap. Petrol Level Indicator for front and rear tanks which have a visible filler-cap. The O. S. Gauge takes the place of the filler cap of the…

scan0179 Sales leaflet for the O.S. Automatic Petrol Gauge for under-bonnet tanks.
View original record LEFT PAGE: A pressure of 1 1/2 to 7 ozs. It functions by means of a pressure of 1 1/2 to 7 ozs., obtained by the weight of a column of mercury of the same height as the liquid to be measured. This…

scan0180 Letter to the O.S. Speedometer Co. requesting information on a petrol gauge.
View original record X4039 X3896 Hs/Rm2/LG. Expl: Dept: 16th. Nov. 1926 Messrs. The O.S. Speedometer Co., 3-6 Alfred Place, Tottenham Court Rd., London W.C.1. Dear Sirs, We should be obliged if you could give us some…

scan0181 Letter from The O.S. Speedometer Co. Ltd. regarding modifications required to fit their gauge to a tank.
View original record N3896 Y4039 THE O. S. SPEEDOMETER CO. LTD., 3-6, Alfred Place, Tottenham Court Road, London, w.c.1. Code used: BENTLEY'S A.B.C. 5TH EDITION. SPEEDOMETERS, MILEAGE RECORDERS, MOTOR CLOCKS, TACHOMETERS,…

scan0182 Letter to O.S. Speedometer Co. regarding experimentation on a tank and sending a blueprint for modification.
View original record X-8919 X4039 Expl: Dept: Hs/Rn2/LG. 19th. Nov. 1926. Messrs. O.S. Speedometer Co., 3-6 Alfred Place, Tottenham Court Rd., London W.C.1. Dear Sirs, With reference to your letter of the 18th. inst. ref:…

scan0183 Letter to O.S. Speedometer Co. requesting the expedited delivery of a tank fitted with a gauge.
View original record X4039 HS/8896 [crossed out] Expl: Dept: Hs/Rm4/LG. 9th. Dec. 1926 Messrs. O.S.Speedometer Co., 3-6 Alfred Place, Tottenham Court Rd., London W.C.1. Dear Sirs, We are still awaiting the arrival of the…

scan0184 Letter from O.S. Speedometer Co. Ltd. regarding improvements and adjustments to a Petrol Gauge.
View original record 45896 . 74039 THE O.S. SPEEDOMETER CO. LTD. 3-6, Alfred Place, Tottenham Court Road, London, w.c.1 Code used: BENTLEY'S A.B.C. 5TH EDITION. SPEEDOMETERS, MILEAGE RECORDERS, MOTOR CLOCKS, TACHOMETERS,…

scan0185 Continuation letter from O.S. Speedometer Co. Ltd. discussing the dispatch and testing of a tank and gauge.
View original record O.S. SPEEDOMETER CO. LTD. CONTINUATION SHEET No. 1. In the meantime, we shall be pleased to learn if the beginning of January will be soon enough for the Tank and Gauge to be despatched to you or…

scan0186 Letter to O.S. Speedometer Co. Ltd. about the delayed delivery of a tank.
View original record Y5494 X4039 Expl: Dept: Hs/Rml/LG. 17th. Dec. 1926 Messrs. The O.S.Speedometer Co.Ltd., 3-6 Alfred Place, Tottenham Court Rd., London, W.C.1. Dear Sirs, We thank you for your letter of the 14th.inst.…

scan0187 Letter to O.S. Speedometer Co. Ltd. chasing the delivery of a promised tank.
View original record 180 X.4039 Expl: Dept: Hs/Rm4/LG. 7th. Jan. 1927. The O.S. Speedometer Co.Ltd., 3-6 Alfred Place, Tottenham Court Rd., London W.C.1. Dear Sirs, With reference to the tank which you promised to let us…

scan0188 Follow-up letter to The O.S. Speedometer Co. requesting an update regarding a tank.
View original record X4039 Expl: Dept: Hs/Rml/LG. 18th. Jan. 1927 Messrs. The O.S.Speedometer Co. 3-6 Alfred Place, Tottenham Court Rd., London W.C.1. Dear Sirs, Further to our letter of the 7th.inst. We are surprised…

scan0189 Letter regarding the discontinuation of the mercury gauge due to high material costs and its replacement with a new model.
View original record 44039 THE O. S. Speedometer Co. LTD. 3-6. Alfred Place, Tottenham Court Road, London, W.C.1. Code used: BENTLEY'S A.B.C. 5TH EDITION. Reference: PP/EM/99. SPEEDOMETERS, MILEAGE RECORDERS, MOTOR…

scan0190 Advice note from The O.S. Speedometer Co. Ltd. for a returned rear petrol tank.
View original record THE O.S. SPEEDOMETER Co. LTD., 3-6, Alfred Place, Tottenham Court Road, London, W. C. 1 Invoice No. 4992 SOLD TO Messrs ROLLS ROYCE, LIMITED, DERBY. Your Order: No... Date: 10th Febuary. 1927…

scan0191 Letter from The O.S. Speedometer Co. Ltd. regarding a new gauge for a tank to be submitted for testing.
View original record X-4039 THE O. S. SPEEDOMETER CO. LTD. 3-6, Alfred Place, Tottenham Court Road, London, W.C.1. Code used: BENTLEY'S A.B.C. 5TH EDITION. SPEEDOMETERS, MILEAGE RECORDERS, MOTOR CLOCKS, TACHOMETERS,…

scan0192 The principle and function of an O.S. Rear Tank Gauge.
View original record O.S. SPEEDOMETER CO. LTD. CONTINUATION SHEET NO. O.S. REAR TANK GAUGE. M <- Manometer <- Autovac Exhauster T.... ....E S ----C PRINCIPLE. To measure the pressure of the air necessary to balance the…

scan0193 Continuation sheet explaining the functioning of the Autovac fuel feed system and its interaction with a gauge.
View original record O.S. SPEEDOMETER Co. LTD. CONTINUATION SHEET NO. 1. necessary to renew the air in order to assure that the gauge always functions correctly. The phenomena which are produced by the functioning of the…

scan0194 Letter from O.S. Speedometer Co. Ltd. requesting an opinion on a petrol gauge sent previously.
View original record X4039. THE O. S. SPEEDOMETER Co. LTD. 3-6, Alfred Place, Tottenham Court Road, London, W.C.1. Code used: BENTLEY'S A.B.C. 5TH EDITION. SPEEDOMETERS, MILEAGE RECORDERS, MOTOR CLOCKS, TACHOMETERS,…

scan0195 Letter to the O.S. Speedometer Co. regarding a delay in testing a petrol gauge.
View original record 4039. Expl: Dept: Hs/Rml/LG. 17th. Mar. 1927. Messrs. The O.S.Speedometer Co., 3-6 Alfred Place, Tottenham Court Rd., London W.C.1. Dear Sirs, With reference to your letter of the 15th.inst. We have…

scan0196 Letter regarding the return of a borrowed gauge due to changes in the petrol feed system.
View original record #4039 Expl: Dept: Hs/Rm9/LG7.11.27. 7th. Nov. 1927. Messrs The O.S. Speedometer Co., 3-6 Alfred Place, Tottenham Court Rd., W.C.1. Dear Sirs, We are returning to you the gauge which you sent to us…

scan0197 Instruction to return a tested petrol gauge to Messrs. O.S. Speedometer Ltd.
View original record X9039 To Roy/Ms. from Hs/Rn. c. to Mt. Stores. Hs/Rm10/LG7.11.27. We are sending into the Stores for return to Messrs. O.S.Speedometer Ltd., 3-6 Alfred Place, Tottenham Court Rd., W.C.1 :- 1 petrol…

scan0198 Requesting experiments to determine the induction pipe length and carburettor placement for aero and chassis engines.
View original record C7 To Wor. for EH. from R. Copy to J. R4/IB71015. COPY. X2758 X.405 8/10/8 Will you please make the necessary experiments on three cylinders of the aero and chassis engine to determine what law the…

scan0199 Continued list of technical considerations for a post-war chassis, focusing on induction pipes and the carburetter.
View original record X.2458 X 2565. - Post-war Chassis -2- R6/W3.10.16. Contd. but to have a very gas tight piston (5 to 7 rings), that will not knock after the first say 10 minutes of use. We will excuse them making a…

scan0200 Instructions for fitting a thin copper water jacket on the water inlet pipes for Chassis 7 CA.
View original record To Mr. Mills from BY. X2758 9th November, 1916. BY15/G91116. RE CHASSIS 7 CA - WATER INLET PIPES. Referring to Mr. Royce's memo R5/W61116, kindly instruct the works to fit a thin copper water jacket…

scan0201 Engine power curves comparing different carburetter and pipe configurations.
View original record To R. from EH. C. to J. " " E. " " By. " " EP. X.2758 X.2758 1/2 EHL/AT6.6.17. X.3071 X.2761 X.2758 X.2766. X.2768 X.682 - RE 7 C.A. CAR H.P. Below are power curves obtained from the engine for this…

scan0202 Technical note on carburettor performance, induction pipes, and fuel consumption.
View original record Contd. )2) induction pipe the other way up so that any raw petrol instead of running into the first cylinder will have to be lapped up. It was noticeable on the standard pipe that the 2 centre…

scan0203 Alterations for the 40/50 HP chassis and delegating the required draughting work.
View original record R.R. 235A (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. X 2458 To Wor. from E. c. to DY. c. to DA. c. to EH. c. to EP. 8th January 1919. E2/G8119. RE 40/50 H.P. CHASSIS Please find attached a…

scan0204 Index of alterations for the 40/50 HP present type chassis.
View original record To BY } EP } EH } c. to CJ. c.to Wor. c.to EP. 18th December 1918. R7/G181218. Compiled by Mr. Elliott. RE ALTERATIONS TO 40/50 H.P. PRESENT TYPE CHASSIS X.2565 OBJECT:- The object of this report is…

scan0205 Carburation experiments and modifications for various engines and chassis.
View original record R.R. 235A (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. To DA. EY. & EH. from R. -7- R7/G181218. Contd. -------------- --------------- (10) CARBURATION. X.2468 X.2458 Experiments should be made to…

scan0206 Scheme for an engine air intake dust elimination system.
View original record Hs. from BY. c. EFC. X.2758 RECEIVED JUN 29 1920 BY5-P29.6.20. CHASSIS INDUCTION SYSTEM. ----------------------- I am sending you herewith some papers in regard to a scheme for eliminating dust from…

scan0207 Agreeing to standardize the size of copper asbestos washers for induction and exhaust pipes.
View original record BY. from Hs. c. to EP. S.FC X.2758 Hsl/LG27.10.20. X.2758 RE COPPER ASBESTOS WASHERS. We agree with the Test Department that it would be better if a copper asbestos washer 49 x 58 was deleted and the…

scan0208 Letter from Mr. Hives to Mr. Warwick about issues with American petrol and various component tests.
View original record ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. X2758 Hsl - G 20.12.20 Dec. 20, 1920 To: Mr. Warwick, Experimental Dept. From: Mr. Hives One of the chief troubles I find they have here with the car is…

scan0209 Request to test and compare the rate petrol passes through Monel Metal gauze versus copper gauze.
View original record take a test and compare the rate which petrol will pass through this Monel Metal gauze compared with the copper gauze we used previously. We should like to get some figures that would give us a…

scan0210 Potential improvements to the 40/50 HP induction system and carburettor.
View original record To R.R. of America Inc. } For attention of OY. } from R. To HS. Copy to CJ. " " WOR. " " PN. " " EP. " " DA. " " BY. " " EFC. X.2758 D 17 FEB 1921 RECEIVED R7/G16/2/21. X.2758 RE 40/50 H.P. INDUCTION…

scan0211 Effectiveness of an alternating plug arrangement in two exhaust manifolds.
View original record To OY. & HS. from R. -2- R7/G16/2/21 Contd. The value of this arrangement can only be ascertained by experiment. It seems, however, possible that it will be more effective than it would appear at…

scan0212 From Mr. Olley to Mr. Hives regarding test results on induction pipes.
View original record ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. X2758 Oy3 - G 17221 February 17, 1921 To: Mr. Hives From: Mr. Olley Re: Induction Pipes written Completing my/letter of February 11th, we have now…

scan0213 Letter from Mr. Olley to Mr. Hives regarding the performance characteristics and findings on an inlet pipe.
View original record X2758 ROLLS-ROYCE OF AMERICA INC. SPRINGFIELD, MASS. Oy6 - G 18221 February 18, 1921 To: Mr. Hives From: Mr. Olley Re: Inlet Pipe Many thanks for your letter of January 31st, which has just come to…

scan0214 Inter-office correspondence regarding inconsistent results with induction pipes and a throttle modification.
View original record R.R.A.-26-5m.-9-27-20 40233 x.2768 INTER-OFFICE CORRESPONDENCE ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. Oy7 - G 3321 March 3, 1921 Dear Hives: Re: Induction Pipes We do not get entirely…

scan0215 Experimental results of exhaust-heated induction pipes and requesting further information.
View original record R.R. 235A (50 T) (S H. 988. 19-2-21) G. 3908 /2788 OY. from Hs. Hs3/LGl1.4.21. INDUCTION PIPES+ I should be pleased if you could give us some information as regards the results you are obtaining with…

scan0216 Letter from Bennett & Wood Ltd. regarding the shipment of an induction pipe fitting.
View original record Form No. 2-1 X.2758 INCORPORATED IN AUSTRALIA. SYDNEY, PITT STREET. CHRISTCHURCH, N.Z. BENNETT & WOOD LTD MERCHANTS. TELEGRAPHIC ADDRESSES, "BENTWOOD," COVENTRY. "SPEEDWELL," SYDNEY. TELEPHONE No 308.…

scan0217 Letter acknowledging the receipt of a case containing one Induction Pipe fitting.
View original record x 2758 Messrs. Rolls-Royce Ltd., Derby. 17th. Mar. 1921. Messrs. Bennet & Wood Ltd., Friars Road, Coventry. Dear Sirs, With reference to your letter of the 15th.Mar. ref.2/5994u. I beg to acknowledge…

scan0218 Testing a machined induction pipe for the 40/50 chassis, recommending its adoption.
View original record X.2758, HY. from Hs. c. to Sft. c. to Ws. HsB/LG6.4.21. X.2758 40/50 CHASSIS INDUCTION PIPES. We have tested the induction pipe which has been machined for the holes where the castings are brazed. We…

scan0219 Letter from Bennett & Wood Ltd. inquiring about an induction pipe to potentially reclaim customs duty.
View original record FORM No. 2-1 x2758 INCORPORATED IN AUSTRALIA SYDNEY, PITT STREET. CHRISTCHURCH, N.Z. BENNETT & WOOD LTD MERCHANTS. TELEGRAPHIC ADDRESSES, "BENTWOOD," COVENTRY. "SPEEDWELL," SYDNEY. TELEPHONE Nọ 308.…

scan0220 Letter to Bennet & Wood Ltd. clarifying that the induction pipe received from Mr. B.A. Peat is a non-functional model.
View original record X2758 Hs3/LG. 14th. April 1921. Bennet & Wood Ltd., Friars Road, Coventry. Dear Sirs, With reference to your letter of the 6th.inst., the induction pipe we have received from Mr. B.A. Peat is only a…

scan0221 Inter-office correspondence discussing engine pre-ignition issues related to heated induction pipes and findings from an engine strip-down.
View original record H.R.A.-25-5m.-9-27-20 40233 X2758 INTER-OFFICE CORRESPONDENCE ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. Oy3 - G 27421 April 27, 1921 Dear Hives: Re: Induction Pipes Replying to your questions…

scan0222 Engine testing concerning spark plugs, overheating, and gasoline comparisons.
View original record Oy3 - G 27421 Mr. Hives - sheet 2. We used Champion plugs of our standard type A.63 (Metric Detachable) and also A.C. Titans (metric standard), both porcelain plugs. A mica plug might not have…

scan0223 Induction pipe experiments conducted on a 40/50 engine.
View original record R.R. 235A (50 T) (S.H. 956, 19-2-21) G. 3008 x2758 To R. from Hs. c. to CJ. c. to BN. c. to E. c. to Da. c. to BY. c. to EP. c. to EWT. for R.R.Inc. attention of OY. COPY x4305 x2758 Hs1/LG26.5.21.…

scan0224 Analysis of liquid petrol accumulation in induction pipes leading to cylinder misfiring and results from various tests.
View original record contd:- -2- Hsl/LG25.5.21. we could obtain the same effect on any make of car with This is a fault I experienced a good deal with 4.EX Car in U.S.A. At first we assumed that this trouble was caused by…

scan0225 The effects and optimal placement of a 'hot spot' on an induction pipe to improve fuel distribution.
View original record Contd. -3- Hsl/LG26.5.21. ------------ a paraffin blow-lamp. We have found this to be a wonderful help. By means of asbestos sheets etc. we can apply a hot spot on any part of the induction pipe, see…

scan0226 Testing modifications to induction and exhaust pipes related to engine heating.
View original record Contd. -4- Hsl/LG26.5.21. ------------ not good. We have tested out the scheme suggested by Springfield. We found that we got a great improvement with it. Upon analysing this out we found that the…

scan0227 The testing of various induction pipes and hot spots to improve engine fuel distribution.
View original record Contd:- -5- Hsl/LC26.5.21. --------------- So far we have not been able to discover - why the variation of these pipes. We have proved a great number of things do not make the difference but so far we…

scan0228 Further tests conducted on a hot spot pipe, including the use of a deflector and comparisons with American cars, concluding on modifying the throttle.
View original record Contd. -6- Hsl/LG26.5.21. first position of hot spot. We made further tests with this hot spot pipe by fitting a small deflector. This consists of a 5/16 screw, screwed on the underside of the cross…

scan0229 Discussion of modifications to the throttle and induction pipe to improve performance with lower-grade fuel in cold conditions.
View original record contd: -7- Hs1/LG26.5.21. ------------------ not sufficient heat with the lower grade fuels. We are getting a temporary throttle made up in which we have cut off the water jacket and instead are…

scan0230 Test report comparing the performance of different induction pipe configurations.
View original record TESTS - INDUCTION PIPES. All tests taken using Mex Petrol with 20% paraffin added. Engine run at full throttle 500 R.P.M. Range - amount of difference we can obtain on the petrol consumed and still…

scan0231 Extract regarding U.S.A. complaints and proposed alterations to the induction system.
View original record X.2758 Extract from R10/G8.6.21. X.3614 - RE U.S.A. COMPLAINTS. X.4305. X.2758. FURTHER NOTES WITH REGARD TO ALTERATIONS TO THE INDUCTION SYSTEM. As pointed out earlier, we find we have confirmed the…

scan0232 Abandoning the piston throttle valve in favour of a butterfly valve for the 20 HP model.
View original record -2- Contd. With this arrangement we abandon the use of the piston throttle valve and use instead a butterfly valve. This is so much the same as we have arranged on the new small 20 H.P. model.…

scan0233 Photograph of the left-hand carburetter position and induction pipes.
View original record "G" FILES "INDUCTION PIPES" X2758 PHOTO OF L.H. CARBURRETTER POSITION JULY 12, 1921 R.R. OF AMERICA

scan0234 Inter-office letter discussing the design and testing of heated induction pipes and manifold systems.
View original record R.R.A, 25 25m. 12-20-20 40849 X2758 INTER-OFFICE CORRESPONDENCE ROLLS-ROYCE OF AMERICA, INC SPRINGFIELD, MASS. Oy3 - G 12721 July 12, 1921 Dear Hives: Re: Induction Systems With my letter on this…

scan0235 Fire risks, throttle controls, and the testing of a new heated pipe design.
View original record Oy3 - G 12721 Sheet #2. Caswell has had gasoline pouring on the bare exhaust pipe on his Buick many times, but never had a fire. We could put a tray under the carburetter so that drips fell clear of…

scan0236 Inter-office letter discussing engine pre-ignition problems related to induction pipes and spark plugs.
View original record R.R.A. 25 25m. 12-20-20 40849 X2758 INTER-OFFICE CORRESPONDENCE ROLLS-ROYCE OF AMERICA, INC SPRINGFIELD, MASS. CC Mr. Belnap Mr. Nadin Oy2 - G 1821 August 1, 1921 Dear Hives: Re: Induction Pipes…

scan0237 The causes and characteristics of engine pre-ignition, detonation, and fuel knock.
View original record Oy2 - G 1821 Sheet #2. "Pre-ignition", "detonation" and "fuel-knock" are still used over here very loosely to mean what we would call bad chirping, and various people give various explanations, as you…

scan0238 Letter discussing engine knocking, pre-ignition, fuel volatility, and performance of different gasoline types.
View original record Oy2 - G 1821 Sheet #3. that it is generally recognized that the tendency to knock increases with decrease in volatility, and that it has been shown that the auto-ignition point in any series of…

scan0239 Inter-office letter discussing induction pipes, thermometers, and preignition in engines.
View original record R.R.A. 25 25m. 12-20-20 40849 X2758 INTER-OFFICE CORRESPONDENCE ROLLS-ROYCE OF AMERICA, INC SPRINGFIELD, MASS. CC Mr. Belnap Mr. Nadin Oy2 - G 2821 Aug. 2, 1921 Dear Hives:- Re: Induction Pipes…

scan0240 Engine detonation, preignition, fuel distribution, and manifold design.
View original record Oy2 - G 2821 Sheet #2. You find that detonation (? "chirping" or "fuel knock") becomes too bad for the car to run, before preignition takes place. Our preignition was intermittent and alarming,…

scan0241 Intake manifold designs, including a proposal and diagram for a corrugated hot spot.
View original record Oy2 - G 2821 Sheet #3. which would be bad if cold because of feeding 1 and 6 with wet stuff, accumulating wet gas at the two ends, and feeding 3 and 4 weak from lack of wall-fuel, might be the very…

scan0242 Inter-office letter discussing induction pipe vacuum figures and road performance.
View original record R.R.A. 25 25m. 12-20-20 40849 X2758 INTER-OFFICE CORRESPONDENCE ROLLS-ROYCE OF AMERICA, INC SPRINGFIELD, MASS. CC Mr. Belnap Mr. Nadin Oy6 - G 3821 August 3, 1921 Dear Hives: Re: Induction Pipe It…

scan0243 Inter-office letter discussing the problems of 'equal distribution' in induction pipes due to the quality of American gasoline.
View original record R.R.A. 25 25m. 12-20-20 40849 INTER-OFFICE CORRESPONDENCE X2758 ROLLS-ROYCE OF AMERICA, INC SPRINGFIELD, MASS. CC Mr. Belnap Mr. Nadin Oy2 - G 8821 August 8, 1921 Dear Hives: Re: Induction Pipes (1)…

scan0244 Analysis of engine performance using collection bottles on carburettors and induction pipes to study fuel distribution.
View original record Oy2 - G 8821 Sheet #2. (2) Bottles: We have been using bottles a la Dorris, first of all on the short pipe with L.H. carburetter, and upward bends, then on our standard pipe with the 1" through pipe.…

scan0245 Various methods for fuel vaporization and manifold design.
View original record Oy2 - G 8821 Sheet #3. (c) The more advanced folk who try to heat the liquid fuel in the pipe without heating the air or vaporized gas. (d) The people like Dorrie who try to collect the liquid fuel…

scan0246 Discussion of various manifold designs intended to improve fuel vaporization to compensate for poor quality gasoline.
View original record Oy2 - G 8821 Sheet #4. It is a fairly general impression that they have got a long way to go to even catch up with the growing poorness of the gasoline. (c) The attempt to heat the liquid fuel only is…

scan0247 Analysis of fuelizer performance and potential developments in induction pipe design.
View original record Oy2 - G 8821 Sheet #5. the fuel drops without heating the mass of the gas appreciably. Furthermore, above half throttle the device naturally dies out from lack of suction vacuum to maintain the…

scan0248 Analysis of a manifold heating and fuel separation scheme for improving engine performance in cold weather.
View original record Oy2 - G 8821 Sheet #6. WHEN FLASK WAS USED TO COLLECT PETROL ONE DRAIN PIPE WAS CONNECTED Of course it would be possible to load up the two gas reservoirs by a number of starts and short runs in cold…

scan0249 Fuel systems, induction pipes, and comparative power tests.
View original record Oy2 - G 8821 Sheet #7. Possibly the scheme of just blowing out of the inlet bends such liquid fuel as consents to go out, will seem very crude to us in a few years time. It looks as though a serious…

scan0250 Dynamometer testing procedures, valve timing, and fuel consumption for engine performance evaluation.
View original record Oy2 - G 8821 Sheet #8. You would not expect the distribution to be much good from a consideration of the complicated shape of the pipe with its many bends and the consequent violent whirlings which…

scan0251 Carburetter control, fuel mixture economy, and suggestions for improving mileage.
View original record Oy2 - G 8621 Sheet #9. to our excellent steering column carburetter control, and to excellent driving, and can only be obtained under touring con-ditions of high speed and well open throttle, and then…

scan0252 Letter discussing experiments and results with different types of induction pipes, particularly heated versus unheated.
View original record CC Mr. Pelnap Mr. Nadin. X2758 August 9, 1921. OY1/G9.8.21. Mr. Claude Johnson, Managing Director, Rolls-Royce Ltd., London, England. Attention Messrs. Royce & Hives. Dear Sir, Re Induction Pipe on…

scan0253 The effects of a heated pipe, fan cooling, and fuel detonation on engine performance.
View original record contd. -2- may be that the effect of these has been to reduce rather than increase the flow of gas in the 1" pipe. Taking them out would prove this point and would reproduce the pipe as at present…

scan0254 Letter urging immediate action on improving a heated induction pipe for better winter performance.
View original record contd: -3- 5. We have never considered that the present heated pipe is a suitable final scheme, or that its effect is all that we could desire. but we do claim that actual results have proved that it…

scan0255 Letter to Hives discussing issues with fuel atomisation in induction pipes, detonation, and potential solutions.
View original record X2758 ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. Oy3 - G 8921 Sept. 8, 1921 Dear Hives:- Re: Induction Pipes Replying to yours Hs/LG 23.8.21. "Dry gas" is a relative term. I think I have…

scan0256 Engine development focusing on induction systems, comparing the performance of drained pipes versus hot spot schemes.
View original record Oy3 - G 6921 Sheet #2. The condition of the cylinders is excellent after long running with the drained pipe, which has no source of heat except our ordinary low speed jet intake and water heated…

scan0257 Technical memo discussing carburettor modifications, alternative fuels, and methods to prevent engine boiling.
View original record Oy3 - C 8921 Sheet #3. because it increases the compression pressure for a given brake horsepower, because the air is lighter and the cylinder has to fill up more for a given power output. He says…

scan0258 Engine performance using different fuel mixtures, comparing gasoline and kerosene.
View original record Oy3 - G 8921 Sheet #4. He noticed no more difficulty in running or starting with this than with ordinary gasoline, and actually raced and passed a Packard roadster at 65 m.p.h. when using the mixture.…

scan0259 Engine performance test results comparing fuel consumption with different cylinder capacities, throttles, and ignition systems.
View original record Cyl. Capacity 27.5 Cubic Inches Big Throat Water 80° C Battery ignition only used BOTTLES HEAT NO BOTTLES HEAT BOTTLES NO HEAT NO BOTTLES NO HEAT ① ② ③ ④ Time to use Time to use Time to use Time to…

scan0260 Graph plotting fuel consumption (US Pints per BHP hours) against revolutions from a traction dynamometer test.
View original record TEST ON SPFLD. TRACTION DYNAMOMETER BELT DRIVE FROM PULLEYS ON REAR WHEELS TO PULLEYS ON DYNAMOMETER SHAFT. DYNAMOMETER RUNS AT TWICE ROAD WHEEL SPEED OR .615 ENGINE SPEED (16/52 AXLE). US PINTS PER…

scan0261 Graph showing Full Throttle Brake Horse Power on a Speed Traction Dynamometer.
View original record FULL THROTTLE BRAKE HORSE POWER ON SPEED TRACTION DYNAMOMETER R.P.M. TEST 4. SOLID LINE. NO BOTTLES. NO HEAT 1" THRO PIPE CAPACITY 27.5 CUBIC INCHES. BIG THROAT BATTERY ONLY TEST 2. DOTTED LINE. NO…

scan0262 Letter discussing induction pipe arrangements and enclosing secret photographs of the Goshawk 11 engine for a new small car project.
View original record R.R. 285A (100 T) (S.H. 169. 11-8-20) G. 2800 X2758 OY. from HS. Aug. 22nd. 1921. INDUCTION PIPES. I have just received your letter of Aug. 8th. From our experience, we would certainly advise you…

scan0263 Letter discussing five specific faults with induction pipes on cars in the U.S.A., including starting issues and fuel problems.
View original record R.R. 285A.(100 T) (S.H. 159. 11-8-20) G. 2800 X2758 OY. from Hs. Hs/LG23. 8. 21. INDUCTION PIPES. Referring to your letter of Aug. 8th. on Induction Pipes. I am afraid I cannot let this letter go by…

scan0264 Engine fuel distribution, comparing dry gas versus liquid petrol and evaluating the 'Dorris' scheme.
View original record Contd. -2- Hs/LG23. 8. 21. distribution but you want a dry gas. My answer to that is "Agreed, but where are you going to obtain your dry gas from?" You have proved and we have proved that the worst…

scan0265 Letter discussing engine performance issues, fuel detonation, and potential solutions involving throttle and shutter adjustments.
View original record Contd. -3- It does provide a means of dealing with any kind of fuel if it is used intelligently. You will appreciate from the scheme that the weakness is that when the engine is pulling at full…

scan0266 Letter discussing a vaporizer scheme, the use of kerosene fuel, and the function of a hot throttle and a Re-Atomizer.
View original record CC Mr. Belnap Mr. Nadin x2758 ROLLS-ROYCE OF AMERICA INC. SPRINGFIELD, MASS. Sept. 12, 1921 Oy3 - G 12921 Dear Hives:- Re: Induction Pipes Replying Hs5/LG30.8.21: Your last few letters about vaporizer…

scan0267 Technical discussion on engine fuel vaporization methods, comparing hot spot and vaporizer schemes for running on various fuels like kerosene.
View original record Oy3 - G 12921 Sheet #2. Still one can believe that it would do a lot of good on the average car, and I am to get a set for mine as soon as it is available for my type of car. It is quite similar to…

scan0268 Request for findings on a vaporiser scheme without a hot throttle.
View original record have every opportunity to get on the walls before they reach the cylinder. Will you please try the vaporiser without the hot throttle and let us know your findings. Oy. M. Olley P.S. - We would also…

scan0269 Technical letter discussing issues with induction pipes, carburation, and potential solutions like the 'Dorris scheme' and exhaust heated throttles.
View original record X2758 OY. from HS. Hs/LG20.9.21. INDUCTION PIPES. I have just received your letter OY1/G27.8.21. Re. Induction Pipes. I am very pleased to hear that you are confirming the results which we have…

scan0270 Report discussing crankcase oil dilution, the 'Dorris scheme', the Goshawk 11 car, and production issues.
View original record contd:- -2- 20.9.21. We have not been able to measure any crankcase dilution. By-the-way, what scheme do you use for measuring the amount of dilution in the oil? We have tried several ways but have…

scan0271 Letter discussing the development and performance of a vaporizer scheme and pilot jet, referencing issues with collector rings.
View original record X2758 CC Mr. Belnap Mr. Nadin Mr. Caswell ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. Oyl - G 51021 Oct. 5, 1921 Dear Hives: Replying to yours Hs/IG20.9.21, the following is our position at the…

scan0272 Cold start issues and experiments with air/fuel mixture devices on car engines.
View original record Oyl - G 51021 Sheet #2. To overcome this by a scheme as shown in the enclosed details, which allows us to play around with the size of the jet in order to get a rough setting of our mixture and to…

scan0273 The merits of an exhaust-heated throttle compared to a vaporizer scheme and hot air methods for fuel delivery.
View original record .. Oyl - G 51021 Sheet #3. This car was fitted with collector rings. of the second type illustrated in print No. XA-1289 so that it proves that these are very effective. We are sure from previous…

scan0274 Function of a vaporizer scheme and methods for measuring crankcase dilution.
View original record .Oyl - G 51021 Sheet #4. 4. Function of the Vaporizer Scheme: We cannot agree with you that the chief function of the vaporizer scheme is to make the engine run better when started up cold. It does…

scan0275 Inter-office letter discussing the performance of induction pipes with and without collector rings, focusing on cold starting issues.
View original record R.R.A. 25 24m. 12-20-20 40848 X2758 INTER-OFFICE CORRESPONDENCE ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. CC Mr. Belnap Mr. Nadin Oy5 - G 211221 RECEIVED STAMP: J.S. JAN 6 1922 December 21, 1921…

scan0276 Potential engine design modifications, particularly regarding carburetters, generators, and magnetos.
View original record At the moment we feel that we should let the design rest as it is until we can obtain - 1. Carburetter raised either on the right or left hand side of the engine. 2. Butterfly or other simple throttle…

scan0277 Drawing of a Magneto Coupling of the Merchant and Evans Fixed Type.
View original record XA.1482 2.375 KEYWAY .093 X .062 DEEP .612 DIA + .1 TAPER 1 IN 11.65 .650 +/-.10 .750 +/-.10 KEYWAY .093 X .062 DEEP .625 DIA +/- .1 ALL DIMENSIONS NOT INDICATED S.A.E. STANDARD R.R. OF A.M. MAGNETO…

scan0278 Inter-office correspondence regarding induction pipes and a new device called the Penberthy Reatomizer.
View original record R.R.A. 25 25m. 12-20-20 40849 X2758 INTER-OFFICE CORRESPONDENCE ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. CC Mr. Belnap Mr. Nadin Oyl - G 2222 February 2, 1922 Confidential. Dear Hives: Re:…

scan0279 Improving fuel distribution in induction systems by fitting a 'Reatomizer' to correct throttle and pipe issues.
View original record Oyl - G 2222 Sheet #2. He therefore considers that we now have an almost perfect induction system and attributes it to our type of throttle with its excellent ability for vaporizing liquid gasoline…

scan0280 Engineering committee report discussing the vaporiser scheme, pilot jet, and radiator shutters for winter conditions.
View original record -3- appreciable drop in horsepower. (g) We do not claim that the vaporiser scheme without the heated throttle is the ultimate perfect device, but we believe that in its latest development, as tried…

scan0281 The function and effects of Reatomizers versus vaporizer pipes in engines, particularly regarding fuel management and cold starts.
View original record Oyl - G 2222 Sheet #3 with vaporizer pipes. We do not suppose that the use of 7 Reatomizers does away with the necessity of the vaporizer pipe, because we know that the latter is practically perfect…

scan0282 Letter discussing an upcoming visit in relation to the weather and recent car performance.
View original record Oy1 - G 2222 Sheet #4 Referring again to the project of your coming to visit us, you will have to make it snappy, because the weather has become warmer and it looks as though we might have an early…

scan0283 Graph comparing Miles Per Gallon (M.P.G.) against Miles Per Hour (M.P.H.) for an Overland 4 Coupe.
View original record M-P-H M-P-G RE-AT. M.P.H | WITH | WITHOUT 11 | 2.25 | 3.25- 15 | 3.00 | 3.75- 20 | 3.50 | 4.25- 25 | 4.50 | 6.25- 30 | 5.75- | 7.25- Best economical settings in both cases. OVERLAND 4 COUPE Note…

scan0284 Cross-section drawing of a throttle body with notes on a machining fault causing power loss.
View original record Throttle Body. Sharp corner or burr left here by machining face A too deep is most potent cause we have found for causing bad distribution, loading up, + loss of power. By Feb 3.

scan0285 Suggesting the fitment of a priming tap on the induction pipe of the 40/50 chassis to aid starting.
View original record To Hs. from E. c. to CJ. c. to BY. c. to Da. X2758 E1/V4.2.22. 40/50 CHASSIS. X.4390 PRIMING TAP FOR STARTING. X.2758 X.3923 X.1559 In the event of failing to obtain a start on the 40/50 chassis with…

scan0286 Inter-office letter discussing carburation, manifold design, and hot air intake performance.
View original record R.R.A. 25 25m. 12-20-20 40849 42758 INTER-OFFICE CORRESPONDENCE ROLLS-ROYCE OF AMERICA, INC SPRINGFIELD, MASS. Oy2 - 9622 June 9, 1922 CONFIDENTIAL Dear Hives: Re: Carburation (Hs5/G 11.5.22) It is…

scan0287 The fitting of a new induction pipe arrangement on a 40/50 HP test engine.
View original record E. from Hs. x2758 Hs4/LG6.7.22. 40/50 HP. INDUCTION PIPES. x2758 x4305 At the present we are fitting on to the 40/50 engine on the test bench,a scheme of induction pipe arranged on the exhaust side of…

scan0288 Bench tests of new 40/50 induction and exhaust pipes, detailing poor performance and distribution results.
View original record To R. from Hs. c. to CJ. c. to E. c. to Da. c. to BY. X2758 Hs7/LG26. 7. 22. 40/50 INDUCTION PIPES X2758 X4305 X4390 We have carried out tests with induction pipes and exhaust pipes as shown on…

scan0289 The optimal placement of the carburettor to mitigate fire risk, referencing the 40/50, Goshawk I, and Hawk Northcliffe engines.
View original record contd:- -2- We believe the best place for the carburetter is on the exhaust side of the engine. From our experience there is infinitely more risk from fire in having the carburetter on the same side…

scan0290 Faulty carburation in cold weather on the 40/50 Chassis and the proposal to introduce new induction pipes.
View original record Hs. C.BY. X2758 EP6/H16.10.22. HHS re 40/50 Chassis. Faulty Carburation - New Induction Pipes. We are now commencing cold damp weather, and appear to be again experiencing faulty carburation with our…

scan0291 Instruction sheet detailing carburettor tests and power curve results for an engine.
View original record RR 26 (10H BKS) (SH 688 5-11-20) MP 231103 X2758 ROLLS-ROYCE LTD. INSTRUCTIONS. To. Mr Hives Order No. Induction Pipes Customer's No. Carburetter Runs condition normal 750 No2 too weak to run 2 strong…

scan0292 Test results for a new induction pipe, showing fuel mixture strength across cylinders at various engine speeds.
View original record RR 26 (10M BKS) (SH 688 5-11-20) MP 231103 ROLLS-ROYCE LTD. INSTRUCTIONS. To Mr Hives Order No. Customer's No. We have tried the new Induction pipe with the following results no heat applied to pipe.…

scan0293 Engine test bed instructions and results for a Copt induction pipe with the carburetter on the exhaust side.
View original record RR 26 (1OH BKS) (SH 688 5-11-20) MP 231103 X 2758 ROLLS-ROYCE LTD. INSTRUCTIONS. To Mr Hines Order No. Engine Test Bed Customer's No. Distribution on Copt Induction Pipe Carburetter on Ex Side No heat…

scan0294 Engine test bed results for distribution on a cast induction pipe with a carburetter on the Cox side.
View original record RR 26 (10M BKS) (SH 698 5-11-20) MP 231103 X2758 ROLLS-ROYCE LTD. INSTRUCTIONS. To Mr Hives Order No. Customer's No. Engine Test Bed Distribution on Cast Induction Pipe Corburetter on Cox. Side…

scan0295 Instructions and test results for an engine induction pipe distribution test.
View original record RR 26 (10H BKS) (SH 698 5-11-20) MP 231103 X2758 ROLLS-ROYCE LTD. INSTRUCTIONS. To Mr Hives 16/1 1923 Order No. Customer's No. Engine Test Bed Distribution on Craft Induction Pipe carb. on Ex side…

scan0296 Successful development of an induction pipe and proposing further experiments on a Marmon engine.
View original record To R. from Hs. c. to CJ. c. to E. X2758 Hs6/LG2. 2. 23. INDUCTION PIPES X.1692 X.4227. X.2758. We have succeeded in making an induction pipe w ith the carburetter fitted on the exhaust side of the…

scan0297 Analysis of fuel mixture distribution in a first experimental induction pipe.
View original record 1st. EXPL: INDUCTION PIPE. X2758 16:2:23 X1697 X2758 [Diagram of an induction pipe with 6 cylinders] Labels on diagram: RICH WEAK DIA. 1.7" CROSS SECTION AREA 2.27 D" 10.2" 7" 12.5" K This pipe gave…

scan0298 Analysis of the causes for unequal fuel distribution in six-cylinder engines.
View original record contd:- -2- at low speeds. Torque very uneven up to 1000 r.p.m. and very slight variation of mixture strength gave erratic running. When heater was in action distribution was better but left hand…

scan0299 Continued page discussing fuel supply proportionality and distribution issues in a Marmon pipe.
View original record contd:- -3- but the supply of fuel is proportional to the square root of the average suction and with incomplete evaporation of the fuel this will give a marked non-coincidence of the air and petrol…

scan0300 Experimental power and jet consumption data for an S.U. carburetter with pipe (1).
View original record X2758 26-2-21 S.U. Carburetter - Expl: Pipe (1) X1487 (crossed out) X2758 Power and Jet Consumption. | R.P.M. | Lbs. | Pet/hr. | H.P. | Pet/HP/hr. pints. |…

scan0301 List comparing induction pipe depressions for the E.A.C. and 40/50 HP engines at various speeds.
View original record X2758 To BY/C. from Hs/Rm. Hs/Rm1/LG26. 5. 25. (Handwritten: X8010 (crossed out), X2758) Herewith is a list of the induction pipe depressions of the EAC. and 40/50 HP. taken under full throttle…

scan0302 Note about the Autovac connection on the induction pipe affecting slow running and promising a forthcoming solution.
View original record W/S. H: from Hs. X2758 Hs4/LG27.5.25. AUTOVAC CONNECTION ON INDUCTION PIPE. 43579 We admit that it is possible for the autovac to affect slow running. We will let you know the reason for this and the…

scan0303 Acknowledging a customer complaint for Chassis No. 41-TM, stating the issue is under review.
View original record W/S. K2758 To H. from Hs. Hsl/LG29.6.25. Chassis No.41-TM - Col. C. Gerrard. K3529 Refering to H4/TE19.6.25. At the moment we have no recommendations to make that will overcome the complaint from this…

scan0304 Requesting the alteration of an induction pipe pattern and its despatch for the production of electron castings.
View original record To: [redacted]. from RHC/CEP. c. to Hs. X2458. RHC/CEP2/BE21.6.29. O/54950 Will you kindly arrange to alter E.33874 Induction Pipe pattern from flame baffle type to drawing E.32816. Mr. Edwards has…

scan0305 Extract concerning the American Model, specifically the transfer of induction, exhaust, silencer, and priming pipes.
View original record X.3677 Extract from R6/E27.9.19 RE AMERICAN MODEL INDUCTION & X.3677 EXHAUST PIPES X.3692. SILENCER. PRIMING PIPES. X 3693. Transfer to reverse side of chassis.

scan0306 The decision to continue right-hand drive chassis production for the American market and halt left-hand drive development.
View original record B.R. 235a (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. X.3674 To Wor. from Bn. Copy to Bl. Da. BY. Hs. CK. X.3614. X.3548. Bn9/W31.10.19. RE AMERICAN CHASSIS. Mr. Johnson telephoned this afternoon that…

scan0307 Internal memorandum discussing the jacketing of induction pipes for chassis destined for America.
View original record X.3677 W/S c. to BY. c. to Sn. c. to Wor. c. to Hs. c. to EFC. BY8/P17.2.21. X.3677 CHASSIS INDUCTION PIPES+ X.3719 RE CHASSIS FOR AMERICA MARKED SHIPMENT. Referring to your memo C7/C16.2.21, and…

scan0308 Typed memo discussing the stoppage of March deliveries as a poorly considered scheme to solve an issue.
View original record R.R. 235B (100 F) (S.H. 798. 10-12-20) G. 2948 contd. -2- towards the end of the year, whilst it is evident that whatever is done to overcome the trouble may have, in some sense or another, to be…

scan0309 Letter discussing a vaporizer scheme, fuel quality, and engine operation.
View original record COPY Y/3677 ROLLS-ROYCE OF AMERICA INC., SPRINGFIELD, Mass. Sept. 12th. 1921. CC Mr. Belnap. Mr. Nadin. OY3/G12.9.21. Dear Hives, RE INDUCTION PIPES. REPLYING HS5/LG30.8.21. Your last few letters…

scan0310 Report discussing fuel vaporization methods, including hot spots, vaporizers, and weirs for engine carburetters.
View original record contd. -2- This is dependent on the principle of re-blowing, and fails of course at low speeds full throttle. Still, one can believe that it would do a lot of good on the average car, and I am going…

scan0311 Request for findings on a vaporizer test, both without the hot throttle and using hot water circulation.
View original record contd. -3- OY3/G12.9;21. have every opportunity to get on the walls before they reach the cylinder. Will you please try the vaporizer without the hot throttle and let us know your findings. OY. P.S.…

scan0312 Induction pipe changes in response to cold starting issues in America.
View original record COPY. X.3677 November 1st. 1921. To Mr. Belnap. CC Mr. Basil Johnson. Mr. Beaver. Mr. Nadin Mr. Bagnall. Mr. Hulley. Mr. Southern. Mr. Caswell. From - Mr. Olley. RE. INDUCTION PIPE CHANGES.…

scan0313 Report comparing the effectiveness of a vaporiser scheme versus an exhaust heated throttle to improve engine performance.
View original record -2- letters HS5/LG20.9.21 and HS4/LG23.9.21 that difficulty was met with in obtaining proper distribution with the device when made experimentally in accordance with this scheme and that at latest…

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