Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | Letter regarding the replacement of a Bijur dynamo and electrical output calculations for a 20 HP car dynamo. | ||
| View original record | R.R. 531w(50r) (S.G. 756. 24-2-20.G.2030) TO EH. from R. c. EFC. X.3533 6th February 1919. R6/G6.2.19. X.3231. RE BIJUR DYNAMO. X.3762. X.3362. X.435. With reference to the Bijur dynamo, I am quite in… | ||
| Scan002 | The design of a dynamo and motor for a 20 HP chassis. | ||
| View original record | To EFC. from R. c. to CJ. X.3533 R7/G24.3.19. X.3533 - RE DYNAMO & MOTOR FOR 20 H.P. CHASSIS X/640 X.3534. Complete drawings will be sent you in the course of a few days, and I hope you will be able… | ||
| Scan003 | 20 HP starter motor and dynamo, requesting models be made. | ||
| View original record | To Da. from E. c. to EFC. c. to EH. c. to CJ. X.3533 E5/B.9.4.19. X.3533. RE 20 H.P. STARTER MOTOR AND DYNAMO. X.3534. We send you herewith drawing No. LeC.1073 shewing the above. Would Mr. Clark… | ||
| Scan004 | Requesting that models of the brush holders for the 20 HP chassis dynamo and starter motor be made and sent to West Wittering. | ||
| View original record | X.3533 To EFC. from E. c, to CJ. E1/G10.4.19. X.3533 RE 20 H.P. CHASSIS DYNAMO AND STARTER MOTOR X.3534. In connection with the above, we are just sending the design through to Derby, and we should be… | ||
| Scan005 | Cover memo for a print of a Dynamo & Starter Motor diagram for a 20 HP Chassis. | ||
| View original record | RR 235 z (200 T) (S.Y. 163. 25-10-18. G. 2244 TO E.H. E.F.C. M. BY. X 3533 DA5/CB/14/4/19. X 3534 RE 20 H.P. CHASSIS. X 3533. Please receive a print of - Lec.1073 - Dynamo & Starter Motor of the above… | ||
| Scan006 | The allocation of work for the Dynamo & Starter Motor on the 20 HP Chassis. | ||
| View original record | X-3533 To By. from Da. Da8/CB15.419. ----------------- --------------- X.3533 RE DYNAMO & STARTER MOTOR - 20 H.P. CHASSIS. ----------------------------------------------------- Prints of Lec.1073 have… | ||
| Scan007 | Proposal to use a Bijur trembler regulator for the dynamo on the 20 HP and new 50 HP chassis. | ||
| View original record | X.3533 Extract from E1/G8.5.19. X.3533 X.294. X.3231. X3560 X1402 X3526 RE 20 H.P. AND NEW 50 H.P. CHASSIS (5) CUTOUT FOR DYNAMO.- For the 20 H.P. and possibly the new 50 HP. chassis. Mr. Royce… | ||
| Scan008 | Proposal from Westland Aircraft Co. to drive propellers from both ends of 'Eagle' or 'Falcon' engines. | ||
| View original record | To R. from BN. c. to CJ c. to Da. c. to EH. c. to EY. X3533 Bn Bn12/P29.5.19. RE PROPOSAL BY WESTLAND AIRCRAFT CO. TO DRIVE PROPELLERS FROM EACH END OF "EAGLE" OR "FALCON" ENGINES. Following on your… | ||
| Scan009 | Letter from Westland Aircraft Works discussing the feasibility of modifying 'Eagle' V1ll engines. | ||
| View original record | COPY. WESTLAND AIRCRAFT WORKS, (Branch of Petters Limited) Yeovil. May 12th. 1919. RAR/EMS N959303. Messrs. Rolls-Royce Ltd., Nightingale Rd., Derby. For the attention of T. Barrington Esq. Dear Mr.… | ||
| Scan010 | Calculations for dynamo speed on a 20 HP vehicle based on tyre size, axle and gear ratios. | ||
| View original record | R.R. 235A (500 T) (S.D. 408. 28-4-17.) Bin. 2/156/13. X. 3533 To EFC. from Da. June X.3481 X.3533 ✔ - 20 H.P. DYNAMO SPEED Tyre - 820 x 120 = 32.25 inches diameter. Back Axle Ratio = 4.1 Gear Box… | ||
| Scan011 | Request for two blueprints of drawings for the 20 HP Chassis - 6060. | ||
| View original record | To EM. from DA. c. to EHC. c. to M. c. to EH. c. to EFC. X. 3533 DA1/CB7.8.19. X.3534 X.3533 X.3616. RE 20 H.P. CHASSIS - 6060 Please receive herewith two blue prints of the following drawings:- N.643… | ||
| Scan012 | Instruction to make six experimental sets of dynamo components for a 20 HP chassis from the provided blueprints. | ||
| View original record | R.R. 235 B (200 T) (S.F. 102. 25-10-18) G. 2244 X.3533 From DA. C. to M. C. to Ags. C. to Ck. DA/STT7/MP29/8/19. re 20 H.P. Chassis - Dynamo - Section No. 6060. Experimental No. 3533. Please receive… | ||
| Scan013 | The specifications found after dismantling a C.A.V. N.G.R.R. type 20 HP dynamo. | ||
| View original record | X3533 to Da. for Mr. Thacker. from EFC. EFC1/AT8.9.19. X.3533.-20 H.P. DYNAMO. X 3232 In connection with the design of the above we have taken to pieces the C.A.V. N.G.R.R. type dynamo and the… | ||
| Scan014 | Requesting specifications after dismantling a C.A.V. armature for a 20 HP dynamo. | ||
| View original record | To FHC. from EFC. X. 3533 EFC5/T9.9.19. X.3232 - RE C.A.V. ARMATURE X.3533 - 20 H.P. DYNAMO. In connection with the design of the dynamo for the 20 H.P. chassis, we wish to have dismantled, the C.A.V.… | ||
| Scan015 | List of electrical apparatus models required for Mr. Royce's inspection. | ||
| View original record | X.3533 To Da. from EFC. c. to En. c. to Mr.Coverley. EFC1/T12.9.19. X.3534 X.3533 X.2618 X.3573 FE MODELS REQUIRED FOR MR.ROYCE We give below for your convenience, a list of models of electrical… | ||
| Scan016 | The specifications for the winding of a C.A.V. N.G.R.R. type dynamo. | ||
| View original record | To Da. for Mr. Thacker. X.3533 FFC5/T17.9.19. from EFC. X.3232 - C.A.V. ARMATURE. X.3533 - 20 H.P. DYNAMO. The particulars of the C.A.V. N.G.R.R.type dynamo winding are as follows:- Number of poles 2… | ||
| Scan017 | Continuation page of a document discussing a 20 HP dynamo. | ||
| View original record | R.R. 235 s (200 T) (S.F. 673. 22-5-19) G. 2376 Contd. -2- EFC5/T12.9.19. reasonably work to in the 20 H.P. dynamo. EFC. | ||
| Scan018 | Requesting recommendations and providing a status update on the vibrator regulator for the 20 HP chassis. | ||
| View original record | To R. from EFC. C. to CJ. c. to E. c. to BN. c. to Da. X.3533. EFC7/T18.9.19. X.3533. X.3560. - VIBRATOR REGULATOR FOR 20 H.P. CHASSIS. X.1402 X.4148 Would you kindly say what you would recommend us… | ||
| Scan019 | Mr. Royce's urgent request for model brush holders for a 20 HP chassis dynamo and motor. | ||
| View original record | R.R. 235a (500 T) (S.D. 403. 26-4-17.) Bm. 2/156/13. X-3533 To Da. from EFC. EFC4/T27.10.19. X 3533 X 3534 RE BRUSH HOLDERS FOR DYNAMO & MOTOR FOR 20 HP. CHASSIS X 3945 X 3573 Will you kindly note… | ||
| Scan020 | Using a brush holder from a 40/50 Horse model for a 20 Horse dynamo motor. | ||
| View original record | X. 3533. To EFC from DA. DA4/CB28-10-19. X.3533 X.3534 RE BRUSH HOLDERS FOR DYNAMO MOTOR FOR 20 H.P. X.3573 In reply to your EFC4/T27-10-19, we have instructed the Brush Holder for the 40/50 Horse… | ||
| Scan021 | Progress report on the 20 HP dynamo and motor for Mr. Royce. | ||
| View original record | R.R. 235A. (100 T) (S.F. 846. 6-8-19) G. 2460. X.3533 E3/G18.2.20. To Ck. from E. Copy to CJ. " " Bn. " " Hs. " " Da. X.3534. X.3533. RE 20 H.P. DYNAMO AND MOTOR. Would you kindly report to Mr. Royce… | ||
| Scan022 | Responding to an inquiry about the status of the Goshawk Dynamo & Motor, specifically regarding mechanical parts and windings. | ||
| View original record | To R. from Ck. c. to CJ. c. to E. c. to Da. c. to En. c. to Hs. X.3533 - GOSHAWK DYNAMO & MOTOR X.3534. In answer to Mr. Elliott's note E3/G18.2.20, all the mechanical parts of this which do not… | ||
| Scan023 | Dynamo winding arrangement for the Goshawk model. | ||
| View original record | X.3533 To R. from Ck. c. to CJ. c. to Da Ckl/T22.3.20. X.3533 - DYNAMO FOR GOSHAWK. X. 3526 Regarding the above, would you now prefer, in view of our discussion on this matter, in the case of the… | ||
| Scan024 | Design specifications for a silent and efficient dynamo for the 'Goshawk'. | ||
| View original record | To EFC. from R. COPY to CJ. Bn. X.3533 R1/G16.4.20. X.3533, RE DYNAMO FOR "GOSHAWK". We must have dynamos which are silent and efficient as regards heating. I feel sure we shall get the best results… | ||
| Scan025 | Arranging the dynamo windings for the Goshawk engine based on Mr. Royce's instructions. | ||
| View original record | R.R. 235 B (50 T) (R.G. 504. 8-1-20) (c. 1585. X. 3533 EFC4/T20.4.20. To Da. from EFC. c. to Bn. c. to Da/Tg. X. 3533 - DYNAMO FOR GOSHAWK. We npw have an answer from Mr. Royce to our Ck1/T22.3.20,… | ||
| Scan026 | Confirming the dispatch of two blueprints for a Goshawk Engine Dynamo Driving Gear Wheel to make experimental sets. | ||
| View original record | To RHC from DA/Stt. | ||
| Scan027 | Speed ratios of the 'Goshawk' dynamo and motor. | ||
| View original record | x3533 To EFC. from By/WER. c. to Da/Thr. By/WER 3/EF25.10.20. X.3533. X.3534. "GOSHAWK" DYNAMO AND MOTOR. ----------------------------------------- With reference to the speed ratios of the above, the… | ||
| Scan028 | Two experimental armature winding designs for the 'Goshawk' dynamo. | ||
| View original record | To Da. from EFC. c. Da/Thr. c. RHC. X 3533 EFC1/T4.12.20. X.3533 - DYNAMO FOR "GOSHAWK" A. The matter of the windings of the above dynamo has now been carefully considered between Mr. Thacker and my… | ||
| Scan029 | Specifications for armature and field winding. | ||
| View original record | Contd. -2- EFC1/T4.12.20. No. of conductors. 432. No. of sections 27 8 turns per section, arranged in the slots as ordinary four-pole wave winding with a step of 1 to 7. The armature to be wound with… | ||
| Scan030 | Calculation sheet for a four-pole dynamo for the 'Goshawk' project, part I. | ||
| View original record | X. 3533 1. 6.12.20. FOUR-POLE DYNAMO FOR "GOSHAWK". I. Cold cutting in 10 m.p.h., i.e. 667 r.p.m. of dynamo. We must have 12.4 volts at 667 r.p.m; if we allow 2.0 volts for field current in armature E… | ||
| Scan031 | Specification table comparing two different armature designs. | ||
| View original record | .2. ARMATURE. | | | | |---|---|---| | Slots. | 31 | 27 | | Conductors. | 496. | 432 | | " per slot. | 16 | 16 | | Coils " " | 1 | 1 | | Comm. Bars. | 31 | 27 | | Turns per coil. | 8 | 8 | | Virtual… | ||
| Scan032 | Calculation sheet for wire arrangement and dimensions within slots. | ||
| View original record | (3) WIRES IN SLOT. Slot Insulation on width. = .030 " " etc." depth. = .090 Wires arranged in 4 x 2 = 8 x 2 = 16 cond. per slot. 20 S.W.G. = .036} } .005 for D.S.C. 22 S.W.G. = .028} 27 slots (20… | ||
| Scan033 | Calculation table for Ampere Turns for various motor or generator components. | ||
| View original record | -4- 6.12.20. CALCULATION OF AMPERE TURNS. | Part. | Matl. | Length (inches) | Virtual section (sq. ins) | Total flux. | Flux density | H. | A.T. per inch. | A.T. |… | ||
| Scan034 | Calculation sheet comparing two wire gauges (18 S.W.G. and 19 S.W.G.) for a field winding. | ||
| View original record | -5- Resistance of Mean Turn = volts per coil / A.T. per coil = 3.1 / 750 = .00413 ω Length of mean turn = 6 + .8π = 8.5" Ohms per 1,000 at 15°C. = 1200 / 8.5 x .00413 = 5.85 ___________________ 18… | ||
| Scan035 | Distributing blueprints for a Goshawk Dynamo brush holder and proceeding without waiting for Mr Royce's approval. | ||
| View original record | TO BY from DA. Copy to HS (1 print). [Strikethrough] Copy to TB (1 print). [Strikethrough] Copy to RHC (1 print). [Strikethrough] Copy to EFC. X.3533 DA10/CB10-12-20. X.3533 Re Goshawk Dynamo.… | ||
| Scan036 | Proposed modified Brush Holder for a Goshawk Dynamo based on scheme 674. | ||
| View original record | X 8533 To R from DA. Copy to Bl. Copy to EFC. DA9/CB10-12-20. X 8533 Re Brush Holder for Goshawk Dynamo. We send herewith a print of "N" Scheme 674 shewing the proposed Brush Holder for this Dynamo… | ||
| Scan037 | Heating tests on dynamos and the development of a dynamo for the Goshawk engine. | ||
| View original record | To R. from EFC. c. CJ. c. E. c. Da. X3533 EFC3/T13.12.20. X.1402. - EXTERNAL VOLTAGE (OR CURRENT) REGULATORS X.294. FOR SHUNT WOUND DYNAMOS. We have been carrying out some heating tests on dynamos,… | ||
| Scan038 | Requesting electrical approval for the Goshawk Dynamos drawing 'N' Scheme 691. | ||
| View original record | X.3533 To EFC from DA. Goshawk Dynamos DA2/CB16-12-20. With reference to the attached instruction to Mr Bailey and drawing "N" Scheme 691, would you kindly let me have your approval of this from an… | ||
| Scan039 | Blueprints for two proposed armatures for the Goshawk Dynamo winding. | ||
| View original record | To ~~HY~~ from DA. Copy to HS (1 print). ~~Copy to TB (1 print).~~ ~~Copy to M&H (1 print).~~ Copy to EFC. X.3533 "GOSHAWK" CHASSIS. Please receive two blue prints of "N" Scheme 691 shewing the… | ||
| Scan040 | Approving the electrical details for the 'Goshawk' Dynamo, scheme 691. | ||
| View original record | X 3533 To Da. from EFC. c. Da/Thr. c. By. EFC1/T17.12.20. X. 3533 - "GOSHAWK" DYNAMO. In answer to your note Da2/CBH6.12.20, I approve of the electrical details of "N" Scheme 691. EFC. | ||
| Scan041 | Two armature winding arrangements, 27 and 31 slots, for the Goshawk Dynamo. | ||
| View original record | To R. from DA. Copy to DH. Copy to EFC. X.3533 DA 32/CB/17.12.20. X.3533 RE "GOSHAWK" DYNAMO. ---------- We send herewith a print of "N" Scheme 691 shewing the arrangement of the Winding on the… | ||
| Scan042 | From 'E.' confirming Mr. Royce's approval to proceed with proposals for the 'Goshawk' Dynamo - N. Scheme 691. | ||
| View original record | X3533 To Da. from E. c. to CJ. c. to Wor. c. to EFC. c. to Hs. E2/G30.12.20. X,3533. RE "GOSHAWK" DYNAMO - N. SCHEME 691. Referring to the above, would you kindly note that Mr. Royce thinks the… | ||
| Scan043 | Design alterations for the Goshawk I and II dynamo and brush holders. | ||
| View original record | X3533 To Da. from E. c. to CJ. c. to Wor. c. to Hs. c. to EFC. E2/G12.1.21. X.3945. X.3533. RE "GOSHAWK I" and II DYNAMO AND BRUSH HOLDERS. Referring to the above, would you kindly note that Mr. Royce… | ||
| Scan044 | Providing blueprints for Dynamo and Motor brushes for the 'Goshawk' I chassis and requesting an order for testing samples. | ||
| View original record | To EFC. C. to Da. [Struck through] RHC. EXPERIMENTAL X.3533 "GOSHAWK" I X. 3533 Dynamo Brush Holder - Section 8090. X. 4069 Motor " " - " 8020. Please receive herewith two blue prints of each of the… | ||
| Scan045 | Technical memo detailing parts for the 'Goshawk' I Dynamo Brush Holder. | ||
| View original record | EXPERIMENTAL BY/WER/EF22. 1..21. C. to EFC. DRG. "GOSHAWK" I X. 3533 - DYNAMO BRUSH HOLDER - SECTION 8090. Please receive herewith two blue prints of each of the following details in connection with… | ||
| Scan046 | Request to order various grades of Goshawk dynamo brushes from the Morganite Co. and Le Carbone Co. for experimental purposes. | ||
| View original record | To Wd. from EFC. c. Wd/Ms. c. Stores. Handwritten top centre: X.3533 Reference top right: EFC5/T25.1.21. X.3533 - GOSHAWK DYNAMO - BRUSHES. Handwritten crossed out: X 3945 Will you kindly order up… | ||
| Scan047 | Instructing a department to cease experimental work on vibrator regulators. | ||
| View original record | X.3533 To EFC. from R. Da. c. C.L. R10/G9.2.21. X.4148.- RE VIBRATOR REGULATOR. X.294. X.3533. As it will now be necessary to curtail so much experimental work in your department, I think it will be… | ||
| Scan048 | Arrangement of the 'Goshawk II' dynamo and a request for catalogues of alternative English-made machines. | ||
| View original record | R.R. 255a (100 T) (S.H. 798. 10-12-20) G. 1947 X 3533 To EFC. from E. c. to CJ. c. to Wor. c. to Hs. c. to Da. c. to By. EB/G14.2.21. X. 3533 RE "GOSHAWKII" DYNAMO. X. 294. The crankcase for Goshawk… | ||
| Scan049 | Design and control methods for the 40/50 Chassis and Goshawk dynamos. | ||
| View original record | H.R. 238A. (100 T) S.H. 728. 10-12-20; G. 2947 X 3533 To R. from EFC. c. CJ. c. Da. EFC2/T16.2.21. X.3526 - R.R. 40/50 CHASSIS DYNAMO MADE FROM STARTER MOTOR PARTS. X.294. X.1402 X.3533.- GOSHAWK… | ||
| Scan050 | Instruction from Mr. Royce to abandon vibrator regulator work and focus on third brush control dynamos. | ||
| View original record | X. 3533 To Ds. from EPC. c. to Ry. c. to RHC. EFC1/T22.2.21. ---- X.3526 - R.R.40/50 DYNAMO MADE FROM STARTER MOTOR PARTS. X.3533 - GOSHAWK DYNAMO. ---- Will you kindly note I have an instruction from… | ||
| Scan051 | Standardisation of carcase dimensions for electrical equipment like dynamos and starter motors. | ||
| View original record | X.3533 R4/G23.2.21. H.S.S. 338A.(100 T/S.H. 7.32.)-10-12-32 G.& S.Ltd. 18 W. R. c. to EFC. X.3533 X.294. X.3534 X.3526. RE ELECTRICAL EQUIPMENT. With reference to the electrical programme, we are… | ||
| Scan052 | Specifications for new designs of dynamos and motors. | ||
| View original record | R.R. 15A.(10M T) R.H. 726. 10-12-20; G. 2947. X.3533 EPC/T3.3.21. X.294 X.343. NEW DESIGNS OF DYNAMOS AND MOTORS. The outside carcase dimensions settled upon by Mr. Royce during my visit were as… | ||
| Scan053 | Design specifications for a dynamo, including a request for calculations from Mr. Royce. | ||
| View original record | S.S. &(Hw T) R.H. 798. 10-12-20. C 2947 -2- Contd. The dynamos are to be single field winding third brush controlled with a span on the field coil over the commutator of about 130 electrical degrees,… | ||
| Scan054 | Confirming receipt of various qualities of carbon dynamo brushes for the Goshawk from Le Carbone Co. | ||
| View original record | X.3533. EFC/T7.3.21. X. 3533 - RE CARBON BRUSHES FOR GOSHAWK DYNAMO. We have to-day received from the Le Carbone Co. 6 D.1553 C.G.3 quality dynamo brushes for the above. 6 " E.G. " " " " " 6 " X " " "… | ||
| Scan055 | Modifications to dynamos for the 40/50 and Goshawk chassis, including adding a third brush. | ||
| View original record | X 3633 EFC5/T7.3.21. To Ba. from EFC. c. By. " RHC. c. to Da/Thr. c. to Hs. c. to By/WER. X.4030. X.3533 X.3626. X.1005. X.294 - DYNAMOS FOR 40/50 AND GOSHAWK CHASSIS. X.1402. During my visit to Mr.… | ||
| Scan056 | Mr. Royce's decisions on dynamo development, testing, costing, and design. | ||
| View original record | Contd. -2- EFC5/T7.3.21. Mr. Royce has arrived at a decision of using machines controlled in this manner from considerations of simplicity. The only examples of machines controlled in this manner… | ||
| Scan057 | Requesting approval for the addition of a control brush to the dynamo for Goshawk I & II and 40/50 models. | ||
| View original record | To EFC. from Da. X.3533. Dal7/CB16.3.21. X.3526 3rd BRUSH & DYNAMO CONTROL. X.3533. With reference to the schemes N Scheme 793 and 796 shewing the addition of a control brush to the dynamo for Goshawk… | ||
| Scan058 | Prints for Goshawk I & II starter motor and dynamo brush holders. | ||
| View original record | R.R. 233 a 100 (?) (S.F. 573. 16-1-19) G. 2354. X.3533 (2) To R from DA. c. to BN. c. to EFC. DA16/CB16-3-21. X. 3533 X 3534 GOSHAWK I & II - STARTER MOTOR & DYNAMO. X 3945 We send herwith a print of… | ||
| Scan059 | Requesting agreement for calculations regarding an alteration to the Goshawk Dynamo and Starter Motor Dynamo's field winding. | ||
| View original record | R.R. 435a (100 T) (S.H. 798, 10-12-20) G. 1947 X.3533 To EFC. from Da. Da4/CB18.3.21. X.3533 RE ALTERATION TO GOSHAWK DYNAMO & X.3526. STARTER MOTOR DYNAMO FOR 3rd. BRUSH CONTROL. Please receive two… | ||
| Scan060 | Confirming agreement on the electrical points for adding a control brush to the R.R. and Goshawk dynamos. | ||
| View original record | X.3533 To Da. from EFC. EFC1/T21.3.21. X.3526 - R.R. DYNAMO MADE FROM STARTER MOTOR PARTS. X.3533 - GOSHAWK DYNAMO. In answer to your Da17/CB16.2.21 with reference to N. Schemes 793/6 showing the… | ||
| Scan061 | Confirming the dispatch of three blueprints for a Goshawk I dynamo brush re-arrangement. | ||
| View original record | X.3533 Hs 21 To BY from DA. c. to HS. (crossed out) c. to HS. c. to RHG (1 print). x.3583 RE GOSHAWK I - DYNAMO. [STAMP: RECEIVED MAR 22] DA6/CB22-3-21. Please receive herewith three blue prints of… | ||
| Scan062 | Issuing details and parts lists for Goshawk I Dynamo Armatures and Commutators. | ||
| View original record | R.R. 285A (100 T) (S. H. 708. 10-12-20) G. 2047 To a/c. C. to EFC. Hs X. 3533 EXPERIMENTAL APR 5 1921 BY/WER2/EF4. 4. 21. X. 3533 "GOSHAWK" I DYNAMO ARMATURES - SECTION 8070. DYNAMO COMMUTATORS -… | ||
| Scan063 | Design and manufacturing suggestions for various armature and coil components. | ||
| View original record | R.R. 256A (100 T) (S.H. 728, 10-12-20) G. 1947 BY/WER2/EF4. 4. 21. Contd. D. 1584 - Banding Wire Clip. D. 1585 - " " Insulation. D. 1586 - " " D. 1587 - 27 Slot Armature Assembly. D. 1588 - Slot… | ||
| Scan064 | Experimental Armatures for the 'Goshawk' I Dynamo, enclosing blueprint drawings. | ||
| View original record | EXPERIMENTAL X.3533. R.R. 235e (100 T)&S.H. 798, 10-12-30) G. 2948 To EFC. BY/WER5/EF5. 4. 21. X. 3533. "GOSHAWK" I. DYNAMO. Regarding the two experimental Armatures for the above Dynamo complete… | ||
| Scan065 | Specification for the electrical operation of a dynamo for the R.R. Goshawk (12 Volt System). | ||
| View original record | X 3533 EFC/T21.4.21. X. 294. SPECIFICATION OF ELECTRICAL OPERATION OF DYNAMO FOR R.R. GOSHAWK. X.3533. X.4259. (12 VOLT SYSTEM). The dynamo, after being run on load on the bench for four hours with an… | ||
| Scan066 | Specified performance data for a Goshawk dynamo under fully hot conditions. | ||
| View original record | X.3533 22.4.21. X. 294. X.3533. DYNAMO FOR R.R. GOSHAWK. X.4259. SPECIFIED PERFORMANCE IN FULLY HOT CONDITION. Speed. Amperes. Volts. 630 0 13.4 700 1.75 13.8 750 2.75 13.95 800 3.5 14.05 900 5.0… | ||
| Scan067 | Parts and blueprints for the 'Goshawk I' declutching gear, section 8110. | ||
| View original record | To RHO. C. to EFC. X3533 EXPERIMENTAL BY/WER7/EF29. 4. 21. X. 3533 - "GOSHAWK" I. DECLUTCHING GEAR - SECTION 8110. Please receive herewith two blue prints of each of the following details in… | ||
| Scan068 | Close proximity of the Actuator Box to the Oil Pump Drive boss on the crankcase due to a drawing error. | ||
| View original record | - 2 - EXPERIMENTAL BY/WER7/EF29. 4. 21 - Contd. It will be found on assembling this Gear that the Actuator Box D. 1431/2 is very close to the boss on the side of the Crankcase which takes the Oil Pump… | ||
| Scan069 | Alterations to blueprints for the 'Goshawk' I - Dynamo and Motor. | ||
| View original record | EXPERIMENTAL To RMC. C. to EFC. X3533 BY/WER2/EF30. 4. 21. X. 3533 X. 3534 'GOSHAWK' I - DYNAMO AND MOTOR. Please receive herewith two blue prints of each of the following alterations:- 220/D - D.… | ||
| Scan070 | Note on pausing work on the Dynamo & Motor for the Goshawk I to focus on sourcing parts for the Goshawk II. | ||
| View original record | X3533 EFC/T24.5.21. X.3533/4. DYNAMO & MOTOR FOR GOSHAWK I. Mr. Robinson remarks - "Both of these have been partly instructed. but we have had to leave this for the time being and concentrate on… | ||
| Scan071 | Design changes for the Goshawk I dynamo, including armature diameter and slot numbers, following a discussion with Mr. Royce. | ||
| View original record | X.3533. To Da. from EFC. c. Ey. c. De/Thr. c. Ey/WER. EFC5/T1.6.21. X.3533 - GOSHAWK I DYNAMO. During my visit to Mr. Royce, the dynamo for Goshawk I was discussed. The calculations made by Mr.… | ||
| Scan072 | Design modifications for a dynamo, including changes to the pole, brush sizes, and carcase. | ||
| View original record | Contd. -2- EFC5/T1.6.21. He considered the cross sectional area of the pole for the previously designed machine too large and that we should reduce this so as to get on more turns for excitation. The… | ||
| Scan073 | Awaiting sketches for Dynamo and Starter Motors for Goshawk I & II before proceeding with design calculations. | ||
| View original record | X 3533 To R. from EFC. c. De/Thr. EFC2/T7.6.21. X.4383/4 - DYNAMO & STARTER MOTOR FOR GOSHAWK II. X.3533/4 - DYNAMO & STARTER MOTOR FOR GOSHAWK I. We are awaiting from you sketches or layouts of the… | ||
| Scan074 | Calculations regarding an alteration to the Goshawk field winding for the control brush. | ||
| View original record | X.3533, ALTERATION TO GOSHAWK FIELD WINDING FOR CONTROL BRUSH. Assumed. 9 Volts for Field Coil Volts. 3 Ohms for Field Resistance. Resistance of Mean turn = Volts per coil / A.T. per coil = 2.25 / 750… | ||
| Scan075 | Effect of crankcase vapours on the generators of the Goshawk 11 engine. | ||
| View original record | X3533 To R. from Hs. c. to CJ. c. to E. c. to Du. c. to BY. c. to EP. c. to Wor. Hsg/LG15.11.21. X4219 X3533 GOSHAWK 11 - DYNAMO DRIVE. We notice on the generators which have been running on Goshawk… | ||
| Scan076 | Dynamo and motor designs for the Goshawk I experimental chassis, comparing specifications with the Goshawk II. | ||
| View original record | X3533 To E. from EFC. c. to Ry. EFC1/T31.8.22. X.3533/4 - GOSHAWK I DYNAMO AND MOTOR We understand it is intended to complete for Goshawk I expl. chassis, the designs of dynamo and motor given on… | ||
| Scan077 | Electrical and mechanical design differences between two motors and seeking clarification on design direction from Mr. Royce. | ||
| View original record | Contd. -2- EFC1/T31.8.22. identical form of winding. As regards the motor, the carcase and armature diameters as given on Lec.1214 are 5" and 2.750" respectively. Our Goshawk II motor is smaller in… | ||
| Scan078 | Overlooked enquiry and a recommendation to fit a Goshawk II dynamo and motor onto a Goshawk I engine. | ||
| View original record | X3533 COPY To EFC, from E. RE GOSHAWK I DYNAMO & MOTOR E1/M.6.9.22. X3533/4 I am sorry that your enquiry regarding the above has been overlooked. I think we should fit the Goshawk II dynamo and motor… | ||
| Scan079 | Cover note forwarding a memo to finalise the dynamo and motor for the Goshawk I engine. | ||
| View original record | To Ey. from EFC. X3533 EFC1/T27.9.22. X.3533/4 - GOSHAWK I DYNAMO AND MOTOR Please find attached copy of Mr. Elliott's note E1/M26.9.22 answering our EFC1/T31.8.22. This will settle the matter of the… | ||
| Scan080 | Listing new parts required for a dynamo's special armature and bearing bracket section. | ||
| View original record | EXPERIMENTAL V3533 [Illegible text, struck through] C. EFC. BY/Ds2/LL13.2.23. RE X.3533 - DYNAMO. Will you please receive herewith one print of each of the new parts required to fit the Special… | ||
| Scan081 | Performance graph showing the specified and actual output of a 20 HP dynamo. | ||
| View original record | 20 H.P. TEMP = 80°C SPECIFIED OUTPUT CURVE TAKEN ON ACTUAL CHASSIS CIRCUIT OUTPUT OF 20 H.P. R.R. DYNAMO ON PRESENT PRODUCTION M.7° C.120° AMPERE OUTPUT APPROX OPERATING VOLTAGE DYNAMO R.P.M. CHASSIS… | ||
| Scan082 | The back of a document page with a print room receipt stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 15 FEB 1926 DERBY | ||
| Scan083 | Trial of special Dunlop tyres, noting their excessive noise compared to Dunlop Magnums. | ||
| View original record | X3538 FN25/DN/28.10.20. S/W. Hs. I have been running our Open Trials car on the special Dunlop tyres with demountable rims, which you arranged I should try. I propose continuing to run on these tyres… | ||
| Scan084 | Letter to Dunlop Rubber Co. Ltd. detailing tyre pressure tests and mileage results for cord tyres on a 40/50 chassis. | ||
| View original record | X3538 Hsl/LB. 29th. Sept. 1921 Messrs. The Dunlop Rubber Co.Ltd., X3538 Aston Cross, Birmingham. Dear Sirs, For the attention of Mr. Paull. Sometime ago we wrote to you with reference to cord tyres… | ||
| Scan085 | Letter discussing tyre pressures for cars over 50 cwts and offering a demonstration. | ||
| View original record | contd:- -2- HEL/LG29.9.21. 3. Cars over 50 cwts. 60 to 65 lbs. We should be greatly obliged if you would let us have your views on this matter. If it would be helpful at all, we should be prepared to… | ||
| Scan086 | Letter from Dunlop concerning tyre wear, pressures, and providing new tyres for testing. | ||
| View original record | X3538 By Appointment To H.M. The King DUNLOP RUBBER CO LTD FOUNDERS OF THE PNEUMATIC TYRE INDUSTRY. TELEGRAMS: "DUNLOPS, BIRMINGHAM." TELEPHONE Nos. (6 LINES): ERDINGTON 261 TO 266. STATION: CASTLE… | ||
| Scan087 | Letter from Dunlop Rubber Co Ltd. discussing tyre inflation pressures and durability. | ||
| View original record | A121 D. R. Co. LTD. CONTINUATION SHEET No. 1. 3rd Oct. 1921 Messrs Rolls Royce, Ltd., On the question of inflation pressures, it is in regard to the durability of the casing more than the durability… | ||
| Scan088 | Michelin tyre pressures being set to 85 lbs per square inch. | ||
| View original record | X3538 S/W(Hs) Bp9/DCL.1021 X3538 Tyre Pressures IHS instructs me to bring matter of Michelin Tyre Pressure to you. You will see, from attached LB2/H/11021, they pump to 85 lbs per sq. inch. If you do… | ||
| Scan089 | Conflicting tyre pressure recommendations for Michelin Cable Tyres and their impact on ride quality. | ||
| View original record | R.R. 950a (20 T) (S.H.Scd. 24-9-20) G 2843 [Handwritten annotations start] BJ. Copy to I.H.S. Py Have not D.S. X3538 RECEIVED [stamp with clock face] Instructions been issued re tyre pressures after… | ||
| Scan090 | Michelin Cable Tyre pressures affecting ride comfort and seeking instructions. | ||
| View original record | RJ. Copy to L.H.S. LHS M.D. RECEIVED 12 OCT LE2/H/11.10.21. MICHELIN CABLE TYRES -------------------- The Michelin Tyre fitters have orders from their Headquarters to put 85 lbs pressure into tyres… | ||
| Scan091 | Benefits of lower tyre pressures and the strategy for engaging with tyre manufacturers. | ||
| View original record | W/S Sp. from Hs. X3538 M.D. Hs1/LG13.10.21. RECEIVED TYRE PRESSURES. We are convinced that high tyre pressures, not only spoil the riding of a 40/50 H.P. car, but less mileage is obtained before the… | ||
| Scan092 | Tyre pressures, balancing comfort, wear, and a comparison with a Marmon car. | ||
| View original record | contd:- -2- that is that we are quite prepared to sacrifice that amount of efficiency for the extra comfort. If we disregard re-treading tyres which we believe is not recommended by the leading tyre… | ||
| Scan093 | Letter to Goodyear Tyre & Rubber Co. regarding tyre pressures for straight-sided cord tyres. | ||
| View original record | COPY. HS1/LG 30th. Sept. 1921. The Goodyear Tyre & Rubber Co., 162, Shaftsbury Avenue, London W.C.2. Dear Sirs, For the attention of Mr. E. R. Preston. We should like to have your opinion as regards… | ||
| Scan094 | Letter to Dunlop Rubber Co. Ltd. detailing tyre pressure tests and their effect on wear and mileage for cord tyres versus fabric tyres on a 40/50 HP chassis. | ||
| View original record | C O P Y. hsl/LG. 29th. Sept. 1291. Messrs. The Dunlop Rubber Co.Ltd., Aston Cross, Birmingham Dear Sirs, For the attention of Mr. Paull. Sometime ago we wrote to you with reference to cord tyres and… | ||
| Scan095 | Letter offering to demonstrate the difference in ride comfort with different tyre pressures. | ||
| View original record | Page 2. If it would be helpful at all, we should be prepared to send a car over to Birmingham in order to demonstrate to you the difference in the comfort of riding in the car with different tyre… | ||
| Scan096 | Case for lower tyre pressures and the approach to be taken with tyre manufacturers. | ||
| View original record | W/S Sp. from Hs. X3538 Hs1/LG13.10.21. TYRE PRESSURES. X3538 X987 We are convinced that high tyre pressures, not only spoil the riding of a 40/50 H.P. car, but less mileage is obtained before the… | ||
| Scan097 | Tyre pressures, wear, and ride comfort, comparing a Rolls Royce chassis with a Marmon car. | ||
| View original record | contd:- -2- Hsl/LG13.10.21. that is that we are quite prepared to sacrifice that amount of efficiency for the extra comfort. If we disregard re-treading tyres which we believe is not recommended by… | ||
| Scan098 | Letter to Goodyear Tyre & Rubber Co. regarding the benefits of low-pressure cord tyres. | ||
| View original record | COPY. Hsl/LG 30th. Sept. 1921. The Goodyear Tyre & Rubber Co., 162, Shaftsbury Avenue, London W. C. 2. Dear Sirs, For the attention of Mr. E. R. Preston. We should like to have your opinion as regards… | ||
| Scan099 | Advantages of low tyre pressures and a strategy to convince tyre manufacturers. | ||
| View original record | X3538 W/S Sp. from Hs. Hsl/LG13.10.21. TYRE PRESSURES. X3538 X4050 We are convinced that high tyre pressures, not only spoil the riding of a 40/50 H.P. car, but less mileage is obtained before the… | ||
| Scan100 | Tyre pressures, balancing comfort against wear and a suggestion for Michelin officials regarding recommended pressures. | ||
| View original record | contd:- -2- Hs1/LG13.10.21. that is that we are quite prepared to sacrifice that amount of efficiency for the extra comfort. If we disregard re-treading tyres which we believe is not recommended by… | ||
| Scan101 | Protest letter sent to Michelin regarding their wish for high tyre pressures. | ||
| View original record | S/W (Hs) X3538 Sp5/DG15.10.21. [Triangle Stamp] Tyre Pressures X3538 Thank you for Hs1/LG13.10.21. and enclosures. Attached is copy of letter sent to Michelin which will serve to mark our protest. I… | ||
| Scan102 | Letter to Michelin Tyre Co Ltd. clarifying recommended tyre pressures for various car weights. | ||
| View original record | [STAMP: RECEIVED OCT 17 F C 21] ap6/DG15.1 sl. 15th October, 1921. Messrs. Michelin Tyre Co Ltd., 81 Fulham Road, Chelsea, S.W.3. Dear Sirs, We understand your mechanics have instructions to pump your… | ||
| Scan103 | Letter from Michelin Tyre Co. Ltd. regarding a misunderstanding about the inflation pressure of their Cable Tyres. | ||
| View original record | ENCLOSURE No. 4025 Ken X3538 MICHELIN TYRE Co. LTD. Messrs. Rolls-Royce Ltd., 14/15, Conduit Street, LONDON. W. 1. TELEGRAMS 'PNEUMICLIN' PHONE LONDON TELEPHONE: 4400 KENSINGTON (10 LINES) 81, Fulham… | ||
| Scan104 | Enquiring if Michelin has reduced the pressure on their cable tyres to align with Dunlop. | ||
| View original record | Typed Content: To Hs. from BJ. c. to LHS. c. to JLT. (Struck through) Michelin Cable Tyres. ------------------------- With regard to the above, will you kindly let me know if the Michelin Company have… | ||
| Scan105 | Inquiring if Michelin has reduced the pressure on their cable tyres in line with Dunlops. | ||
| View original record | X3538 To Hs. from BJ. c. to LHS. c. to JLS. RECEIVED OCT 19 1921 BJ/Py12/D18.10.21. Michelin Cable Tyres. With regard to the above, will you kindly let me know if the Michelin Company have yet come… | ||
| Scan106 | Internal memorandum and handwritten reply regarding correspondence with the Michelin Company about their cable tyres. | ||
| View original record | X3538 To Sp. from Py. Py8/D20.10.21. Michelin Cable Tyres. ------------------ With reference to attached, please let me know if Derby are taking up this matter with the Michelin Company. Encs: Py.… | ||
| Scan107 | Correct operating pressure for Michelin Cable Tyres. | ||
| View original record | X3538 TO JLE. from BJ. BJ/Py7/D20.10.21. Michelin Cable Tyres. -------------------- With reference to your LE2/H/11.10.21, we have not yet arranged with the Michelin Company with regard to the… | ||
| Scan108 | Letter from Michelin providing a table of maximum axle loads for various cable tyre sections and corresponding inflation pressures. | ||
| View original record | X3538 MICHELIN TYRE Co. LTD. TELEGRAMS: PNEUMICLIN PHONE LONDON TELEPHONE: 4400 KENSINGTON. (6 LINES) Messrs. Rolls Royce Limited., 14/15 Conduit Street. W.1. 81. FULHAM ROAD, LONDON, S.W. 3. ackd… | ||
| Scan109 | Letter from Michelin Tyre Co. Ltd. providing a table of maximum axle loads and corresponding tyre pressures. | ||
| View original record | MICHELIN TYRE Co. LTD. -2- 22nd October. 1921 Messrs. Rolls Royce Limited. 14/15 Conduit Street. W. 1. Maximum load per axle Cwts Pressure per sq: inch; Section. Single Twin Cwts Cwts 135 Cwts 60 70… | ||
| Scan110 | Price list for Michelin motor car tyres, detailing Beaded-edge and Straight-side types. | ||
| View original record | No. 459. MICHELIN MOTOR CAR TYRES. 1st October, 1921. Beaded-edge Tyres. COVER ONLY SIZE. | Cable | Universal | Steel Studded (Semelle) | INNER TUBE. Bolt Valve. (Prices in £ s. d.) Voiturette Légère… | ||
| Scan111 | Price list and specification sheet for Michelin 'Cable' motor car tyres. | ||
| View original record | X3538 THE MICHELIN “CABLÉ” COVER owing to its exceptional mileage, has made possible “the Mile at less than pre-war cost.” IMPORTANT. The “Cable,” being of itself an oversize, must be fitted to a rim… | ||
| Scan112 | Tyre pressures and correspondence with the Michelin Company. | ||
| View original record | X3538 To Hs. from BJ. c. to Sp. BJ/Py8/D22.10.21. Re Tyre Pressures. ------------------- Please let me know if you are taking up the matter of tyre pressures with the Michelin Company. I attach copy… | ||
| Scan113 | Internal memorandum regarding tyre pressures and correspondence with the Michelin Company. | ||
| View original record | To Hs. from BJ. c. to SPr X3538 RECEIVED 22 OCT 1921 BJ/Py8/D22.10.21. Re Tyre Pressures. Please let me know if you are taking up the matter of tyre pressures with the Michelin Company. I attach copy… | ||
| Scan114 | Copy of a letter from Michelin Tyre Co. Ltd. regarding a misunderstanding over the inflation pressure for Cable Tyres. | ||
| View original record | COPY OF LETTER FROM THE MICHELIN TYRE CO. LTD. -------- 81, Fulham Road, S.W. 3. 17th October 1921. Messrs. Rolls-Royce Ltd., 14/15, Conduit Street, London, W. 1. Ref: KM2/11. Dear Sirs: We beg to… | ||
| Scan115 | Tyre pressures, enclosing a copy of a letter from the Michelin Tyre Company. | ||
| View original record | X3538 To Hs. from BJ. BJ/Py6/D25.10.21. Re: Tyre Pressures. ------------------ With reference to my memorandum BJ/Py8/D22.10.21, I now enclose copy of a letter dated the 22nd inst. which we have… | ||
| Scan116 | Tyre pressures, enclosing a letter received from the Michelin Tyre Company. | ||
| View original record | R.R. 959s. (20 T) (S.H. 326. 31-1-21). Bm. 2/6/15. .X3539 To Hs. from BJ. BJ/Py6/D25.10.21. Re: Tyre Pressures. ------------------ With reference to my memorandum BJ/Py8/D22.10.21, I now enclose copy… | ||
| Scan117 | Letter from Michelin Tyre Co Ltd. detailing recommended inflating pressures for Cable Tyres based on axle load. | ||
| View original record | Ref: AL/S 81 Fulham Road, London, S.W.3. 22nd October, 1921. Dear Sirs, In reply to your letter of the 15th instant, reference Sp6/DG15.10.21. we have pleasure in giving you below a table showing the… | ||
| Scan118 | Discrepancy between company-recommended tyre pressures and those suggested by Dunlop. | ||
| View original record | Hs. from EP. c.c. to EY. (struck through) c.c. to Wd. (struck through) X3539 F.R. EP7/H28.10.21. Re TYRE PRESSURES. With reference to Wd's memo reference Wd11/NJ26.10.21, it would appear that the tyre… | ||
| Scan119 | Tyre pressures provided by Michelin and proposing new additions for specific axle weights. | ||
| View original record | W/S X3538 Sp. from Hs. Hs3/LG29.10.21. TYRE PRESSURES. X3538 The tyre pressures given by the Michelin people are very interesting because they appear to be in agreement with the pressures we require.… | ||
| Scan120 | Requesting instructions regarding recommended tyre pressures from the Michelin Company. | ||
| View original record | To Hs. from BJ. X.3538 BJ/Py10/H5.11.21. Michelin Tyres. We forwarded to you on the 25th October a letter from the Michelin Company, giving the pressures per square inch which they recommend. Will you… | ||
| Scan121 | Letter from Goodyear Tyre & Rubber Company regarding tyre pressures. | ||
| View original record | REGENT 3324 (5 Lines) X3538 "GOTYRUCO, WESTCENT, LONDON." GOODYEAR The Goodyear Tyre & Rubber Company (Great Britain) Limited. 162. Shaftesbury Avenue. London. W.C. 2. IN YOUR REPLY PLEASE QUOTE 14th… | ||
| Scan122 | Letter from a tyre manufacturer explaining the effects of tyre pressure on mileage and tread wear. | ||
| View original record | - 2 - Messrs. Rolls-Royce, Ltd. the best results from the standpoint of tyre mileage would need to be relatively much higher than if the same car, carrying the same load, and so forth, were equipped… | ||
| Scan123 | Tyre pressure maintenance, user behaviour, and the performance of cord versus fabric tyres. | ||
| View original record | - 3 - Messrs. Rolls-Royce, Ltd. such high pressures as we sometimes do recommend if we had any assurance that users would maintain uniform pressures. As you probably know, however, it is common… | ||
| Scan124 | Letter providing recommendations on tyre pressure for straight-side cord tyres. | ||
| View original record | Messrs. Rolls-Royce, Ltd. - 4 - friction than the fabric carcass construction. And, Straight-side cord tyres may also appear to permit of being operated at relatively lower pressures with safety, for… | ||
| Scan125 | Letter from Goodyear's Managing Director regarding a follow-up visit and an inquiry about tyre test mileage. | ||
| View original record | Messrs. Rolls-Royce, Ltd. - 5 - my ideas clearly in letter form, but perhaps you can follow my ideas in this matter to a certain extent. I will hope to have the pleasure of an opportunity to discuss… | ||
| Scan126 | Follow-up memo requesting a definitive decision on tyre pressures for circulation to depots. | ||
| View original record | X3538 Hs. from EP. c. to BY. c. to Wd. EP/Thn6/H22.11.21. Re Tyre Pressures. RECEIVED With reference to the above and our memo EP7/H28.10.21, we shall be glad to know whether anything sufficiently… | ||
| Scan127 | Request for definite tyre pressure recommendations for Dunlop and Michelin tyres. | ||
| View original record | R.R. 950s. (20 T) (S.H. 326. 31-1-21). Bm. 2/6/15. X3538 S/W(Hs) SP6/DG3.12.21. Tyre Pressures I understand you will send definite recommendations to us re tyre pressures for Dunlop and Michelin… | ||
| Scan128 | Standardization of tyre pressures with Michelin and other tyre makers. | ||
| View original record | W/S Sp. from Hs. Y3538 Hs7/LG5.12.21. TYRE PRESSURES. We have not yet received a completed list of tyre pressures from the Michelin Co. You will remember we recommended certain pressures for the lower… | ||
| Scan129 | Cover letter regarding an attached Michelin letter and a table of tyre pressures. | ||
| View original record | X3538 S/W(Es) SP8/DG23.12.21. Tyre Pressures Attached is copy of Michelin Letter together with Table of Tyre Pressures which you require. I believe you will consider these satisfactory. We await your… | ||
| Scan130 | Letter from Michelin Tyre Co Ltd. regarding tyre pressures and an enclosed inflation table. | ||
| View original record | 81 Fulham Road, London, S.W.3. Ref: KRL/14 22nd December 1921. Messrs. Rolls-Royce Ltd., 14-15 Conduit Street, London W.1. Dear Sirs, We are much obliged for your letter of the 20th inst., and note… | ||
| Scan131 | Inflation table for Michelin beaded edge tyres. | ||
| View original record | KR/36.3.11.21. INFLATION TABLE FOR ALL MICHELIN BEADED EDGE TYRE Section Maximum Weight per axle Weight carried per axle Pressure per square inch. Cwts Cwts Lbs Vte Legere and 3" 9cwts 7 45 9 60 80 12… | ||
| Scan132 | Query regarding instructions to owners about the inflation of tyres and pressure. | ||
| View original record | S/W. Hs. PN11/DN/20.11.21. X3538 INFLATION OF TYRES. With regard to the attached dossier relating to inflation of tyres and instructions re owners in respect of pressure, could you let me know how the… | ||
| Scan133 | Recommended tyre pressures from the Michelin Company. | ||
| View original record | To Hs. From BJ. BJ/Py/C/25.11.21. X3538 [Illegible signature] 11/11 Michelin Tyres. We forwarded to you on the 20th October a letter from the Michelin Company, giving the pressures per square inch… | ||
| Scan134 | Clarity of tyre inflation instructions for customers. | ||
| View original record | X3538 To P.N. from B.J. EJ5/M15.11.21. 29 27/11. Inflation of Tyres. You will remember that we had some conversations with Derby at conferences with regard to inflation of tyres and making it clear to… | ||
| Scan135 | How correct tyre inflation could reduce complaints and expenses related to springs. | ||
| View original record | To P.N. from B.J. X3538 BJ6/H29.11.21. INFLATION OF TYRES. As we are being put to so much trouble and expense now in regard to springs, and apparently a good many of the complaints might not reach us… | ||
| Scan136 | Request for a table of recommended tyre pressures following recent springing complaints. | ||
| View original record | Sp9/GC.3122. S/W. Hs X3538 Tyre Pressures. We have not yet received your complete table of recommended tyre pressures. We are frequently asked what are correct pressures. We now want to write to our… | ||
| Scan137 | Recommendation to fit Hartford pattern double-acting shock dampers to the 40/50 chassis to counteract issues caused by the increased resilience of cord tyres. | ||
| View original record | X3538 To RR. of America Inc. from R. for the attention of - Mr. Belnap. Mr. Olley. Mr. Nadin. c. to CJ. BJ. c. to FN. Hs. c. to BY. EP. c. to Hm. R2/10.2.22. RE. REAR SPRINGS. X.2628 X.3538 X.3461.… | ||
| Scan138 | Setup of shock dampers and springs for a vehicle. | ||
| View original record | contd:- -2- that the maximum damping effect be obtained from the front shock dampers and that the rear of the car should be fitted with the Hartford pattern as described above. You will notice that… | ||
| Scan139 | Vital importance of correct tyre pressures for Goshawk-11 cars. | ||
| View original record | Roy. from EP. c. to Wd. RE. TYRES PRESSURES FOR TYRES FITTED TO GOSHAWK-11 CARS. We find that the tyre pressures on these cars are of vital importance to the running of the car and we do not wish to… | ||
| Scan140 | Letter to the Dunlop Tyre Company disagreeing with the high pressure of 70 lbs moulded onto their supplied tyres. | ||
| View original record | COPY. DUNLOP TYRE COMPANY. On the 32 X 4½ S.S. tyres you have lately supplied us with, there is moulded in the cover - "Keep inflated to 70 lbs. pressure - Load 1200 lbs." We should like to point out… | ||
| Scan141 | Recommended tyre pressures from various manufacturers, namely Michelin, Dunlop and Palmer. | ||
| View original record | X3538 X7602-? Hs. c. to Ev. c. to Wd. c. to Hy. c. to EP. Lo/50 or Grahams? I am expecting Mr. Blake of the Dunlop Rubber Co. here shortly, with a view to a full discussion on the revised pressure… | ||
| Scan142 | Table comparing tyre specifications for load and pressure for various makes. | ||
| View original record | 1st. May 1922. MAKE OF TYRE SIZE LOAD PER WHEEL IN LBS. PRESSURE [] " IN LBS. MICHELIN Old list dated October 1/21. 120 m/m or 4 1/2" 1,120 60 MICHELIN New list, also dated Oct. 1/21, but revised… | ||
| Scan143 | Reduced tyre pressures following Goshawk tests and communication from the Dunlop Co. | ||
| View original record | X3538 Hs RECEIVED To Hs. - from Roy. " EP. - " " " BY. - " " " Wd. - " " " Hm. - " " " Hy. - " " " Hr. - " " Following our various discussions regarding tyre pressures and our suggestion of reducing… | ||
| Scan144 | Letter from Dunlop Rubber Co. Ltd. providing a revised table of pressures and loads for Cord Tyres. | ||
| View original record | COPY. DUNLOP RUBBER CO. LTD., Broad St. Chambers, 41 Easy Row, BIRMINGHAM. EHB General Sales Manager. Messrs Rolls-Royce Ltd., Nightingale Road, DERBY. 16th May 1922. Dear Sirs, Tyre Pressures.… | ||
| Scan145 | Booklets from Dunlop and Michelin outlining new agreed reduced tyre pressures. | ||
| View original record | Z. 235a (100-1) (S.H. 798. 10-12-20) G. 294S [Routing List:] Hs from Roy (from Roy is struck through) c. to Ev. c. to EP. c. to Hm. c. to Hy. [End Routing List] X3538 Roy (struck through) returned as… | ||
| Scan146 | Discrepancies in recommended tyre pressures from Dunlop compared to the company's own and Michelin's standards. | ||
| View original record | X3538 ROY. from EP. c. to Hs. c. to BY. c. to Hn. c. to Hy. EP/Thn12/H23.6.22. Re. REDUCED TYRE PRESSURES. With reference to your ROY15/NJ19.6.22, we have now received the Booklets from the Michelin… | ||
| Scan147 | Brief typed note responding to concerns about figures in a Dunlop 'Correct Tyre Inflation' booklet. | ||
| View original record | EF. c. to Wor. c. to Hs. c. to Ry. c. to HM. c. to Hy. c. to Hr. X.3538 ROY12/FJ28.6.22. Thanks for your note of the 23rd inst. X3538 We too are surprised to note the figures in the latest Dunlop… | ||
| Scan148 | Letter to Dunlop Rubber Co. questioning the tyre pressures listed in their new booklet. | ||
| View original record | COPY. ROY10/FJ28622. 28th June,1922. Messrs.Dunlop Rubber Co., 41, Easy Row, Birmingham. Dear Sirs, Ref.-EHB. Tyre Pressures. (Cord Tyres). We have now received a batch of your new lists (undated)… | ||
| Scan149 | Table comparing Dunlop tyre pressures and maximum loads from various lists and a letter. | ||
| View original record | 28-6-22 DUNLOP TYRE PRESSURES. SECTION OF TYRE. | DUNLOP LIST DATED OCT. 1/21. | DUNLOP NEW LIST (UNDATED). | DUNLOP LETTER MAY 16/22. | B.E. | Cord B.E. | Cord S.S. | B.E. | Cord S.S. | B.E. | Cord… | ||
| Scan150 | Covering note for an attached letter received from the Dunlop Co. regarding tyre pressures. | ||
| View original record | BP. c. to Wor. c. to Hs. c. to By. c. to Hm. c. to Hy. c. to Hr. X3534 ROY4/FJ30.6.22. Further to mine ROY12/FJ28.6.22, attached is copy of letter we have this morning received from the Dunlop Co. re… | ||
| Scan151 | Letter from Dunlop Rubber Co. Ltd. regarding the dispatch of incorrect tyre inflation lists and providing revised information. | ||
| View original record | COPY OF LETTER RECEIVED FROM:- DUNLOP RUBBER CO.LTD., BROAD STREET CHAMBERS, 41, EASY ROW, BIRMINGHAM. EHB.L. June 29th,1922. Messrs.Rolls-Royce Ltd., Nightingale Road, Derby. Dear Sirs, We are in… | ||
| Scan152 | Dunlop Tyre Pressures, enclosing a 'Care of Tyres' booklet. | ||
| View original record | Y3538 c. to Wor. c. to Hs. c. to By. c. to Hm. c. to Hy. c. to Hr. F.C. RECEIVED JUL 18 1922 ROY/GEA12/FJ17.7.22. Re Dunlop Tyre Pressures Reverting to my note ROY4/FJ30.6.22, I now send you herewith… | ||
| Scan153 | Discrepancies in recommended tyre pressures and axle loads from Dunlop. | ||
| View original record | X3538 ROY. c. to Wox. c. to He. c. to By. c. to Hm. c. to Hy. c. to Hr. EP/Thn9/019.7.22. dict. 18.7.22. Re. Dunlop Tyre Pressures. -------------------- We have received your memo.… | ||
| Scan154 | Letter regarding the difficulty in persuading Dunlop Co. to lower their recommended tyre pressures. | ||
| View original record | X3538 Roy4/Wl. G. 22 Dict. 31.7.22 RE DUNLOP TYRE PRESSURES. ----------------- Thank you for your note of the 19th. inst. re above. As explained, it will not be possible to persuade the Dunlop Co. at… | ||
| Scan155 | Ongoing efforts to influence tyre manufacturers on tyre pressure standards. | ||
| View original record | X.3538 F.R. FR Hs. c. to BY. c. to ROY. EP/Thn2/H7.11.22. re. TYRE PRESSURES. We shall be glad to know whether you are satisfied that all possible has been done with the tyre makers from the point of… | ||
| Scan156 | Tyre pressures for the Goshawk model. | ||
| View original record | X3538 Mr. Walker from Hs. Hs3/LG27.11.22. With reference to your query Re. Goshawk tyre pressures - the pressure for the - front tyres is 40 lbs. rear tyres 50 " for closed cars, and 45 " " open cars.… | ||
| Scan157 | Tyre pressure recommendations from the Dunlop Company, referencing their booklet 'The care of Tyres'. | ||
| View original record | EP. c. to Hs. c. to Dr. c. to Mr. X3538 ROY2/DB27.12.22 Reverting to the suggestion contained in your memo EP/Thm2/H7.11.22., that we might with advantage lower our tyre pressures even below those… | ||
| Scan158 | Letter from Dunlop Rubber Co. Ltd. regarding tyre pressures, load schedules, and tyre life. | ||
| View original record | COPY DUNLOP Rubber Co.Ltd. Fort Dunlop Erdington BIRMINGHAM Ref: TECHNICAL ADVISORY MANAGER WB.CC.10.2212. December 22nd.1922 Messrs. Rolls-Royce Ltd. Nightingale Road. DERBY. TYRE PRESSURES Dear… | ||
| Scan159 | Letter explaining the detrimental effects of tyre pressure reduction on performance and life, with reference to two graphs. | ||
| View original record | Messrs. Rolls-Royce Ltd. December 22nd.1922 In order to show you how important the effect of pressure reduction is on the performance of the tyres we are enclosing you herewith two graphs. That marked… | ||
| Scan160 | Letter from Dunlop Rubber Co. Ltd. concerning the adoption of lower pressures for Cord Tyres. | ||
| View original record | Messrs. Rolls-Royce Ltd. regarding the adoption of pressures lower than the much reduced schedule at present existing with regard to Cord Tyres. As further information on this subject becomes… | ||
| Scan161 | Comparison of speeds with different tyre pressures on a 6-EX car. | ||
| View original record | X3538 COMPARISON OF SPEEDS WITH DIFFERENT TYRE PRESSURES. Tests carried out on 6-EX Car. Dunlop cord tyres 33 X 5. Road - smooth tarmacadam. No wind - dry. Test 1. 80 lbs. per sq.in. in tyres. Start -… | ||
| Scan162 | Demonstration of new low-pressure tyres from the Dunlop Rubber Co. | ||
| View original record | To R. from Hs. c. to CJ. c. to E. c. to Da. c. to EY. X3538 Hs5/LG16.5.23. TYRES. X.4565 X.3538. We have recently had a visit from Mr. Macbeth Experimental Engineer for the Dunlop Rubber Co. He… | ||
| Scan163 | The characteristics, testing, and fitting of new Dunlop tyres on 20 HP and 40/50 HP car models. | ||
| View original record | contd:- -2-2 as a bicycle tyre. The rim, having no loose flange, is water- tight. The weight of the complete tyres and wheels is pract- ically the same as the present standard. The peripheral weight… | ||
| Scan164 | Tests carried out to prove the effect of tyre pressures on maximum speed. | ||
| View original record | X3538 To R. from Hs. c. to CJ. c. to E. c. to Da. c. to BY. Hs3/LG2.6.23. EFFECT OF TYRE PRESSURES ON MAXIMUM SPEED. X.4578 X.3538. You will remember at Le Canadel the question was raised with regard… | ||
| Scan165 | Tests conducted to determine the effect of tyre pressures on the performance of a 40/50 model. | ||
| View original record | EFFECT OF TYRE PRESSURES ON 40/50 PERFORMANCE. We carried out tests to determine the effect of tyre pressures on - (a) Speedometer readings. (b) Acceleration and maximum speed. (c) Tractive… | ||
| Scan166 | Tyre tests, analysing the effects on speedometer readings, maximum speed, tractive resistance, and fuel consumption. | ||
| View original record | CHECK ON ROAD FIGURES. TYRE TESTS. (a) Speedometer reading. Increase in recorded speed 5% .. increase in r.p.m. of wheels 5% .. decrease in effective circumference of tyres 5% (nearly). This is… | ||
| Scan167 | The difference in petrol consumption based on tyre pressure. | ||
| View original record | contd:- -2- produces a correspondingly small percentage difference in the consumption. The difference in petrol consumption between tyres at 40 lbs. per sq.in. pressure and 50 lbs. per sq.in. pressure… | ||
| Scan168 | Graph showing the effect of tyre deflation on tractive resistance for well-worn Canadian Dunlop Cord tyres. | ||
| View original record | TESTS TAKEN ON 3 E.X. CANADIAN DUNLOP CORD USED WELL WORN. T.R. LBS. PER TON M.P.H TYRES 30 LBS ☐ TYRES 90 LBS ☐ EFFECT OF TYRE DEFLATION ON TRACTIVE RESISTANCE. SOFT TYRES INCREASE TRACTIVE… | ||
| Scan169 | Letter to Dunlop Rubber Co. detailing the disadvantages experienced with balloon tyres, focusing on tread noise and vibration. | ||
| View original record | Y3538 Hs13/LG. 1st. Oct. 1923. Messrs. The Dunlop Rubber Co., Erdington, Birmingham. Dear Sirs, For the attention of Mr. Macbeth. Y3538 X4565 We will not repeat the known advantages of the Balloon… | ||
| Scan170 | Faults, specifically vibration and noise, observed during the testing of Balloon tyres on different car models. | ||
| View original record | contd:- -2- With the Balloon tyre tyres it is there to a considerably increased extent. The actual complaint is that there is a vibration somewhere between 20 and 15 m.p.h. On the 40/50 HP. car with… | ||
| Scan171 | On tyre pressures for the 20 HP chassis, comparing experiences with Dunlop and Rapson tyres. | ||
| View original record | To EY. from Hs. X3538 Hs3/LG28.5.24. 20 HP. CHASSIS TYRES. X.3538 (crossed out) X3602 (crossed out) X1238 (crossed out) Referring to your EY28/H27.5.24. All our experimental covered cars are run with… | ||
| Scan172 | Experiments on high-speed steering wobble and its relationship to tyre pressure. | ||
| View original record | To Hs. from DA. +3538 DA1/M1 7. 8. 25. HIGH SPEED STEERING WOBBLE EXPERIMENTS. X.457 X. 3538 We understand from R. that there is a report on the results of tests with different tyre pressure, but so… | ||
| Scan173 | Tyre pressures for the Phantom, comparing instruction book values with test results for balanced wheels. | ||
| View original record | To B.J. from Hs. [Handwritten] 43588 [Handwritten] XS950 [Handwritten] 103-MC Hs5/LG11.9.25. TYRE PRESSURES. With reference to BJ9/DN10.9.25 attached. The Phantom Instruction Book gives the minimum… | ||
| Scan174 | Decision not to change tyre pressures on the 20 HP chassis to address high-speed wobbles. | ||
| View original record | x3538 BY/NW. c. Hs. BY18/H. 1. 10. 25. 20 HP. TYRE PRESSURES. ----------------------- Hs. informed me yesterday that he did not propose to put up the tyre pressures on the 20 HP. chassis to overcome… | ||
| Scan175 | Inquiring about the compatibility of a new Dunlop light pattern wheel with standard tyres to ensure global availability for customers. | ||
| View original record | To Hs. from BJ. Copies to PN. O.W.E. [PN. O.W.E. is crossed out] X3538 [Handwritten] BJ2/H30.10.25. TYRES. Re attached copy of R4/M25.10.25, before taking any action on this matter, we should be glad… | ||
| Scan176 | Dunlop tyres for the 40/50 and 20 HP models, including recommended tyre pressures and shock damper adjustments. | ||
| View original record | COPY. To C.J. from H. Copies to B.J. PN. R4/M27.10.25. Re TYRES. I understand that the Dunlop Co. are making us an especially good tyre for the 40/50, with a light pattern of wheel which also has… | ||
| Scan177 | Testing Dunlop tyres, recommended pressures, and their effect on steering. | ||
| View original record | EXPERIMENTAL REPORT. Exptl. No. X3538 REF Hs/Rm2/LG31.10.25. To BJ. from Hs/Rm. c. to PN. c. to CWB. TYRES. With reference to BJ2/H30.10.25 attaching copy of R4/M25.10.25. We have, up to the present,… | ||
| Scan178 | Steering tests carried out on Chassis 93-NK at various tyre pressures. | ||
| View original record | R.R. 493A (50 H) (D.D. 31. 12-6-25) J.H.L. EXPERIMENTAL REPORT. C O P Y. Expl. No. REF: GWH1/Gms.7.25. To Hs. from G.W.Hancock. RE. CHASSIS 93-NK. Steering tests carried out on 93-NK. Front tyres… | ||
| Scan179 | Incorrect tyre pressure advice in the instruction book, prompted by a 10,000-mile test in France. | ||
| View original record | X3538 To EY. from BJ. Copy to Hs. BJ10/H16.11.25. Re 10,000 Miles Test Car in France. With reference to Hs1/LG14.11.25, please consult with Hs. and those concerned, to decide whether the advice to… | ||
| Scan180 | Updated tyre pressures for the 40/50 HP Chassis Instruction Book. | ||
| View original record | X3538 BJ. c. Hs. c. BY/NW. BY5/H. 17.11.25. TYRE PRESSURES. ----------- With reference to BJ1C/H. 16.11.25. we have discussed this matter with Hs. who is of the opinion that we should modify the… | ||
| Scan181 | Steering, tyre pressures, hydraulic dampers, and axle improvements. | ||
| View original record | ✓3538 To HS. from R. To BY. from R. c. to CJ. BJ. PN. R6/M18.11.25. STEERING - TYRE PRESSURES. X.3538 X.5830 X.8430 X.457 I notice in France they have come to the same conclusion as myself, namely,… | ||
| Scan182 | Recommended tyre pressures for 20 HP cars, considering high speed wobbles and Dunlop Company's advice. | ||
| View original record | X3538 BY3/H. 8.12.25. c. Hs. TYRE PRESSURES. ------------ Referring to BJ12/N. 25.11.25. and BJ4/H. 4.12.25. both on the above subject, I have discussed this matter with Hs. and after giving the… | ||
| Scan183 | Letter to Dunlop Rubber Co. regarding tyre pressures and axle weights for chassis. | ||
| View original record | c. Mailing Dept. c. Hs. V3538 BY1C/H. 15.2.26. February 15th, 1926. Monday. Messrs The Dunlop Rubber Co., Ltd. Fort Dunlop, Erdington. Birmingham. For the attention of W. Bond. Esq. Dear Sirs,… | ||
| Scan184 | Tyre pressure recommendations for different axle loads and passenger numbers. | ||
| View original record | - 2 - Our present practice has been, as indicated in our letter of January 12th, to group all axle loads for over 20 cwt. as using 50 lbs. pressure. Your proposals now push up the pressures in the… | ||
| Scan185 | Concluding page of a letter discussing vehicle passenger capacity. | ||
| View original record | - 3 - BY10/H. 15.2.361 on the road would be with only the driver and one or two passengers. Yours faithfully, TECHNICAL PRODUCTION ENGINEER? FOR ROLLS ROYCE LIMITED. COPY | ||
| Scan186 | Recommended tyre pressures from the Dunlop Company for various chassis weights. | ||
| View original record | X3538 HS. X4565 BY5/H. 16.3.26. I give below copy of tyre pressures as now recommended by the Dunlop Company for High Pressure Tyres, Medium Pressure Tyres, and Low Pressure or Balloon Tyres. I tried… | ||
| Scan187 | Comparing the suspension performance of a Lancia Lambda to the 20 HP and Silver Ghost models. | ||
| View original record | V3538 To R. from Hs/Rm. c. to BJ. RG. c. to E. DA. c. to BY. WOr. c. to Na. Hs/Rml/LG26.4.26. SUSPENSION. K4048(See print) We have carried out tests with the Lancia Lambda car. Before doing this, we… | ||
| Scan188 | Design and friction characteristics of Lancia Lambda rear springs. | ||
| View original record | To R. from Hs/Rm. c. to BJ. RG. c. to E. DA. c. to BY. Wor. c. to Ns. Hs/Rm3/LG26.4.26. LANCIA LAMBDA REAR SPRINGS. We have taken details of the Lancia Lambda rear springs. These springs are fitted… | ||
| Scan189 | Tyre pressures for medium pressure tyres and well base rim combinations for 40/50 HP and 20 HP chassis. | ||
| View original record | X3538 Mr.Hancock. Hs. BY9/H. 21.6.26. TYRE PRESSURES FOR MEDIUM PRESSURE TYRE & WELL BASE RIM COMBINATION. 40/50 HP. Chassis. Axle weight not exceeding 24 cwts. 40 lbs. 28 cwts. 45 lbs. 35 cwts. 50… | ||
| Scan190 | Requesting the preparation of printed tyre pressure instructions for New Phantom customers. | ||
| View original record | HS X3538 To C. from BJ. Copy to Wor. Copy to BY. Copy to Hs. Copy to Sg. New Phantom. Tyres. BJ11/E25/10/26 It is necessary that every customer who has low pressure tyres supplied shall have very… | ||
| Scan191 | Effects of low pressure tyres and tyre wear on the steering of the 40/50 HP model. | ||
| View original record | To BY. from Hs./Ru. X3538 Hs/Rm6/LG29.10.26. LOW PRESSURE TYRES ON 40/50 HP. X4565 X4430 With the adoption of low pressure tyres, the steering susceptibility to small defects in these items has become… | ||
| Scan192 | Tyre manufacturing defects, such as varying tread sections, which can lead to poor steering and vibration. | ||
| View original record | contd :- -2- In this case it is useless to expect good results by balancing the tyre because it may still run out of truth and cause vibration. Sometimes when tyres leave the Factory, they have treads… | ||
| Scan193 | Fitting of new well base wheels and tyres to a test chassis. | ||
| View original record | X3538- 6th January 1927. By Hs I think you can best deal with this. you have actual experience firsthand 1067. LETTERS FOR ATTENTION. We are getting well base wheels & 6.75 tyres from commencement of… | ||
| Scan194 | Response to a query on tyre pressures and arrangements for a mislaid instruction book. | ||
| View original record | S/W. D/L This should be on E/S Ray Hunt 4/1/27 Whr/Roll/WP.5.1.27. STAMPED: 1067 STAMPED: 6 JAN 1927 STAMPED: RECEIVED Re: Tyre Pressures We attach original memo Ptll/WP.22.11.26. and we shall be glad… | ||
| Scan195 | Letter from Melbourne regarding tyre pressures and steering on Phantom models, suggesting modifications for Australian road conditions. | ||
| View original record | C/o All British Motor Co. Pty. Ltd., 109- 113 Russell Street, MELBOURNE. Re instructions regarding Tyre Pressures on Page 10 of Phantom Instruction Book, I wish to point out that though these tyre… | ||
| Scan196 | Recommending an alteration to the instruction book regarding front tire pressure after testing. | ||
| View original record | Copy for attention of Mr. E.W. Hives, L Rolls Royce Ltd. Derby, England. X3538 November 9th, 1927. OYL.R.11927 TO Mr. Ainsworth Mr. Southern Mr. Caswell FROM Mr. Olley cc - Mr. Beaver Mr. Nadin Mr.… | ||
| Scan197 | Need to advise on the importance of 40-lbs front tyre pressure and the suspension's influence on steering. | ||
| View original record | X.3538 S/W (Hs.) Whr15/AP. 30. 5. 28. re Your memo Hs/RM1/LG.24.5.28. I asked C.W.B. whether he considered any action should be taken to advise overseas Depots, Retailers, owners, etc., of the… | ||
| Scan198 | Recommended tyre pressures for 40/50 HP and 20 HP models. | ||
| View original record | Y3538 To Hm: from Hs/Rn. c. to EP. BY/NW. Hs/RnL/LG3.11.28. TYRE PRESSURES. ---------------- For riding comfort it is essential that the tyre pressures are as low as possible at the rear. The front… | ||
| Scan199 | Depot sheet detailing recommended tyre pressures for the 20 HP model. | ||
| View original record | To Hm. from Hs/Rn. c. to Mx. X3538 Hs/Rn4/LG20:11.28. DEPOT SHEET. 20 HP. TYRE PRESSURES. We recommend that the pressures for the 31 X 5¼" tyres should be :- FRONT 35 lbs/sq.in. REAR 35 lbs/sq.in. The… | ||
| Scan200 | Request to test the effect of different back axle gear ratios on petrol consumption. | ||
| View original record | To EH. from R. R2/G28.3.19. Handwritten: X.3542 ✓ Handwritten: X.8454 Handwritten: X3036 RE PETROL CONSUMPTION AND BACK AXLE RATIOS. There is some little doubt as to the effect on petrol consumption… | ||
| Scan201 | Petrol consumption in relation to various back axle gear ratios. | ||
| View original record | To R. from EH. c. to CJ. c. to E. c. to Da. X3542 COPY EHL/LG3.4.19 RE PETROL CONSUMPTION AND BACK AXLE RATIOS X.3457 - X.3071. 3056. With reference to Mr. Royce's memo R2/G28/3/19, we find that the… | ||
| Scan202 | Outlining a road resistance test procedure for cars. | ||
| View original record | Contd. -2- EH1/LG3.4.19. 13½. We have lately arranged that on the road which we take all our consumption tests, we make a test to shew the relative road resistance. We get the car running steadily at… | ||
| Scan203 | Requesting performance tests on cars, focusing on engine power, speed on hills, and the impact of various physical factors. | ||
| View original record | To EH. from R. c. to CJ. c. to EFC. c. to BN. R11/G24.4.19. X. 3542 - Speed of Cars with Certain H.Ps., Varying Loads & Varying Road Resistances RE CAR 31 RB. I send you herewith copy of memorandum to… | ||
| Scan204 | Performance variations between car 31-RB and 58-NA, and potential modifications. | ||
| View original record | TO CJ. from R. c. to OY. c. to EH. c. to Bn. Copy RE CAR 31 RB. With reference to Mr. Olley's memo (OY8/F31/3/19) regarding car 31-RB when compared with 58 NA, RB cars should be later cars than NA, so… | ||
| Scan205 | Recommending weight reduction and discussing the manufacturing of bevel gearing in America. | ||
| View original record | To C.J. from R. RE CAR 31-RB. CONTD. (2) I strongly recommend the removal of all weight possible, and it is possible when changing the pistons to aluminium to remove the balance weights, and… | ||
| Scan206 | Outlining the fundamental points for judging car performance. | ||
| View original record | R.R. 493a (50 H) (D.D. 31. 12-6-25) J.H.L. EXPERIMENTAL REPORT. Card H Expl. No. X3542 REF: Hs/Rm2/LG121025 To R. from Hs/Rm. c. to CJ. BJ. c. to PN. CWB. c. to EP. Mx. c. to Hm. Wor. c. to OY.… | ||
| Scan207 | Car acceleration in relation to weight and engine power, with graphs. | ||
| View original record | EXPERIMENTAL REPORT. -2- Expl. No. (1) ACCELERATION. (a) Direct drive - car weight. The acceleration of two cars which are otherwise exactly similar will be inversely proportional to their weights… | ||
| Scan208 | Factors affecting vehicle acceleration, including axle ratios, tractive resistance, carburation, and flywheel inertia. | ||
| View original record | R.R. 498a (50 H) (D.D. 31. 12-6-25) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF. Hs/Rm2/LG121025 The same argument applies to axle ratio alterations as more power is then available at the same speed… | ||
| Scan209 | Page discussing engine torque curves and acceleration performance. | ||
| View original record | R.R. 499A (50 H) (D.D. 31. 12-6-25) J.H.D. EXPERIMENTAL REPORT. -4- Expl. No. REF Hs/R m2/LG121025 automatically to 12 ft/sec², or 20%. Naturally, therefore a car noted for its top gear slow running,… | ||
| Scan210 | The methodology for comparing car efficiency and performance. | ||
| View original record | R.R. 493A (50 H) (D.D. 31. 12-6-25) J.H.D. EXPERIMENTAL REPORT. -5- Expl. No. REFis/R m2/LG121025 Before comparing two cars for efficiency it is as well to ascertain :- Engine displacement. Direct… | ||
| Scan211 | The effects of wind resistance and hill climbing on car performance. | ||
| View original record | R.R. 493a (50 H) (D.D. 3), 12-6-25 J.H.D. -6- Expl. No. REF Hs/Rn2/LG121025 EXPERIMENTAL REPORT. Wind resistance. As this increases as the square of the speed, it is obvious that it is of primary… | ||
| Scan212 | Vehicle acceleration and performance on gradients, referencing the Brooklands test hill. | ||
| View original record | R.R. 493A (50 H) (I.D. 31. 12-6-25) J.R.D. EXPERIMENTAL REPORT. -7- Expl. No. REF Hs/Rn2/LG18.10.25 Almost any car could rush Brooklands test hill on top gear, but none make a standing start on the 1… | ||
| Scan213 | Showing a graph and discussion on the relationship between vehicle acceleration and hill climbing gradients. | ||
| View original record | R.R. 498a (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. -8- Expl. No. REF: Hs/Rm2/LG121025 ACCELERATION EQUIVALENT OF HILL CLIMBING. ACCELERATION Ft/Sec² Surmountable gradients. Torque curve,… | ||
| Scan214 | High-speed performance, analyzing windage, exhaust, and streamlining with a corresponding performance graph. | ||
| View original record | R.R. 493a (50 H) (I.X.D. 31. 12-6-25) J.H.D. EXPERIMENTAL REPORT. -9- Expl. No. REF: Hs/Rm2/LG121025 Road Wheel H.P. Road Speed M.P.H. A B = Loss in max. speed due to under-gearing - (1.5 m.p.h.) C D… | ||
| Scan215 | The impact of streamlining, gear ratios, and braking on vehicle performance. | ||
| View original record | EXPERIMENTAL REPORT. -10- Expl. No. realised that the outline of a car beneath the frame is of great importence with regard to wind resistance, a cushion of air tries to form between the car and the… | ||
| Scan216 | The factors affecting a car's braking performance, such as friction, weight, and gradients. | ||
| View original record | R.R. 493A (50 H) (D.D. 31. 12-6-25) J.H.D. EXPERIMENTAL REPORT. -11- Expl. No. REF Hs/Rn/LG12.10.25 the car behaves. The main deciding external factor is the co-efficient of friction between the tyre… | ||
| Scan217 | Vehicle stopping distances and times, including the effect of gradients. | ||
| View original record | R.R. 498a (50 M) (U.D. 31. 12-6-25) J.H.L. EXPERIMENTAL REPORT. -12- Expl. No. REF Hs/Rm2/LG121025 rate at which it could pull up on the level on w the same surface minus the acceleration due to the… | ||
| Scan218 | Vehicle braking performance, including a graph and analysis of wheel locking and retardation. | ||
| View original record | R.R. 493a (50 H) (D.D. 31, 12-6-25) J.H.B. EXPERIMENTAL REPORT. -13- Exptl. No. REF Hs/Rm2/LG121025 ROAD SPEED (M.P.H.) MINIMUM TIME TO REST (SECS) A B Rear Brakes Only Coefficient of friction) = .7… | ||
| Scan219 | High-speed performance and acceleration of the Phantom compared to competitor vehicles. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to RG. E. c. to DA. BY X3542 Hs/Rm4/LGS.10.26. HIGH SPEED PERFORMANCE. 469. We are continually having the wonderful speeds and accelerations of various cars quoted… | ||
| Scan220 | Vehicle performance, comparing a 20 HP model against competitors and discussing braking tests on a Phantom. | ||
| View original record | contd :- -2- are markedly light. Some of the bodies being supplied with the 20 HP. give a car weight unladen of over 35 cwts., this naturally kills performance. On every side, however, larger engines… | ||
| Scan221 | Observations on the performance of a Lincoln car's suspension and a 6-cylinder A.C. engine. | ||
| View original record | contd :- -3- The rear suspension of the Lincoln car was remark- ably good throughout its whole range. The 6-cyl. A.C. engine is fitted with an absolutely normal A.C. touring body complete with… | ||
| Scan222 | Performance data comparison table for various motor cars over standing and flying mile distances. | ||
| View original record | CAR. | Type of body. Remarks etc. | Standing 1/4 mile. Secs. | AV. MPH. | Standing 1/2 mile. Secs. | AV. MPH. | Flying 1/2 mile. Secs. | AV. MPH. VAUXHALL. 30 - 98 HP. | 2-seater, wings and screen.… | ||
| Scan223 | Bar chart comparing the 'Displacement / Ton Mile' for various closed and open cars. | ||
| View original record | DISPLACEMENT / TON MILE CLOSED CARS CHRYSLER 23/75 - 8260 RENAULT 45 - 7830 BENTLEY 6.5 LITRE - 7500 LINCOLN 5.9 LITRE - 7310 DAIMLER 35 - 6410 PHANTOM R.R. - 6120 20 H.P. R.R - 5360 OPEN CARS PACARD… | ||
| Scan224 | Blank page marked with a Print Room stamp. | ||
| View original record | ROLLS-ROYCE LIMITED. PRINT ROOM -8 OCT. 1926 DERBY. | ||
| Scan225 | Power curve graph for a 6-cylinder, 2-litre A.C. engine showing BHP against RPM. | ||
| View original record | 6-CYL. 2-LITRE A.C. POWER CURVE. B.H.P. R.P.M. 110 M.E.P. BHP 100 M.E.P. 90 M.E.P. SINGLE CARBURETTER. 2 VALVES PER CYLINDER - inlet larger than exhaust. OVERHEAD CAMSHAFT. | ||
| Scan226 | The testing of a Chrysler Red Head 72, detailing its weight, gear ratio, and engine performance. | ||
| View original record | X35242 To R. From Hs/Am. Hs/Rml/L.G.10.5.28. CHRYSLER RED HEAD 72. L4012 CAR WEIGHT. We tried one of these cars. It was fitted with a five-seater sedan body. We were surprised to find that the… | ||
| Scan227 | Car performance, including acceleration tests up Ticknall Hill and comparisons with other vehicles. | ||
| View original record | contd :- -2- any attempt to isolate the scuttle and dash. There is the usual automatic advance in the distributor head. As a generalisation the engine is as unobtrusive as any 6-cyl. we have tried,… | ||
| Scan228 | Performance review and comparison of a Chrysler car against other American contemporaries. | ||
| View original record | contd :- -3- STEERING. as good as any we have tried on an American car. Light, effective and reasonably free from road shocks. We understand high speed wobbles inevitably occur if the front tyre… | ||
| Scan229 | Report page analyzing a car's weight, safety, engine appendages, and body construction. | ||
| View original record | contd :- -4- be much more than 23 cwts. as bumpers were fitted fore and aft to the closed car we weighed. It would seem that we might procure useful XXX information as to how exactly they do obtain… | ||
| Scan230 | Letter to the Royal Automobile Club requesting a suitable road near Cambridge for a high-speed steering test. | ||
| View original record | X 3542 "The Knoll", Littleover, Near Derby. X3805 22nd. June 1926. The Royal Automobile Club, Pall Mall, London. Dear Sirs, I wish to do a steering test on my car which will approach Continental… | ||
| Scan231 | Performance comparison report of an improved 20 HP car against the standard model and a Chrysler car. | ||
| View original record | Y3542. To R. from Hs. c. to SG. Wor. c. to E. DA. c. to BY. PN. c. to EP. 20 HP. X4012 V5720 We have carried out a number of tests on the road comparing the performance of the improved 20 HP. car… | ||
| Scan232 | Performance comparison of the 20 HP car against the 40/50 model, discussing modifications and weight impacts. | ||
| View original record | contd :- -2- our specification performance will still be below the Chrysler and similar cars. The relative performance of the 40/50 car compared with the 20 HP. car shews that whereas we have… | ||
| Scan233 | Test report on a 6.5 Litre Bentley, focusing on high-speed wobble and steering issues on poor surfaces. | ||
| View original record | To R. from Hs/Rm. X3542 c. to BJ. Wor. c. to E. DA. c. to BY. PN. c. to CWB. Hs/Rm1/LG28.6.28. 6 1/2 LITRE BENTLEY. X8774 X3805 By arrangement with Sales, we tried a 6 1/2 litre Bentley. The test was… | ||
| Scan234 | Steering issues, focusing on column movement, wobbles, and a comparison with a Bentley vehicle's steering system. | ||
| View original record | Contd :- -2- front springs as there is not more than 1.00" buffer clearance at normal load, possibly this is an attempt to alleviate wobbles. The second very objectionable feature about the steering… | ||
| Scan235 | Vehicle performance evaluation report on its brakes, engine, clutch, gearbox, and suspension. | ||
| View original record | contd :- -3- BRAKES. Fair - not well equalised pulling to the N.S. The Dewandre servo does not let the foot pedal up as rapidly as one could wish, making snap braking in traffic difficult. On the… | ||
| Scan236 | Performance and production quality analysis of a Bentley, comparing it to a Phantom and a Chrysler. | ||
| View original record | contd :- -4- PERFORMANCE. The performance of the car, which we understand weighed 50 cwts., was about equal to that of the standard Phantom. We checked the speedometer by the watch and against that of… | ||
| Scan237 | Letter to Mr. B. Bonniksen inquiring about trialing an Isochronous Speedometer on an experimental car. | ||
| View original record | R.R. 235a (500 T) (S.D. 408. 28-4-17.) Bm. 2/156/15. ---------- 1320. 6 lines. X.3508 Bonniksen Isochronous Speedometer. EFC1/T. 28th May 1919. Mr. B. Bonniksen, 16, Norfolk Street, Coventry. Dear… | ||
| Scan238 | Letter from B. Bonniksen regarding the supply of a speedometer and suggesting an alternative manufacturer. | ||
| View original record | X.3508 Inventor and Manufacturer of the "KARRUSEL" (or REVOLVING ESCAPEMENT) WATCH. This construction of watch adjusts itself automatically, and has three times broken all records for Timekeeping at… | ||
| Scan239 | Letter from B. Bonniksen concerning overwhelming demand for the Isochronous Speedometer and a new manufacturing arrangement. | ||
| View original record | X.3508 B. BONNIKSEN, 16. NORFOLK STREET, COVENTRY. Gentlemen, The Isochronous Speedometer has now established itself so strongly among Motorists that I am overwhelmed with orders to a greater extent… | ||
| Scan240 | From EFC to EH requesting particulars for ordering a Bonniksen Isochronous Speedometer for an experimental car. | ||
| View original record | To EH. from EFC. EFC2/T30.5.19. X.3508 - BONNIKSEN ISOCHRONOUS SPEEDOMETER Will you kindly supply me with all the usual particulars necessary for ordering up a speedometer for the experimental car. We… | ||
| Scan241 | Bonnniksen Isochronous Speedometer, including details on flex length and catalogue supply. | ||
| View original record | X.3508 BY/JHS/H. 3. 9. 19. EFC. c. Mr. Ormerod. RE BONNIKSEN ISOCHRONOUS SPEEDOMETER. In reply to your EFC2/T30.5.19, we are supplying herewith the catalogue referring to this Speedometer, from which… | ||
| Scan242 | Information required for ordering a Bonniksen Dead Beat Speedometer. | ||
| View original record | Ck. from BY. BY25/P3.9.19. X.3508 RE BONNIKSEN DEAD BEAT SPEEDOMETER. Referring to the information necessary to order the above, will you please note that the following information should be given:-… | ||
| Scan243 | Requesting an experimental order of a Bonniksen Isochronous Speedometer for an Experimental car. | ||
| View original record | To O.O. from EFC. EFC1/T4.9.19 X.3508 - RE BONNIKSEN SPEEDOMETER Will you kindly order up experimentally from Mr. B. Bonniksen, 16 Norfolk Street, Coventry, one of his Isochronous Speedometers… | ||
| Scan244 | Notification of receipt for an Isochronous Speedometer and springs for experimentation. | ||
| View original record | H.R. 224 s 200 T) (S F. 674. 22-5-19) G. 2376. X.3508 Mr Clark. from O.O. Wd/Dnl/HP181019. 18th October. 1919. E.J.C. R.H. Please note that we have received from Mr. B. Bonniksen 1 Isochronous… | ||
| Scan245 | Instruction sheet detailing the testing and incorrect readings of a Deschnevaux Speedometer. | ||
| View original record | X3508 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: Mr Hives Order No. Customer's No. The Deschnevaux Speedometer We have tested the entire instrument on its bench. It is hopelessly incorrect. In its first… | ||
| Scan246 | Note on the repair findings for a Donnikson's Isochronous Speedometer. | ||
| View original record | HS C.K. COPY. X.3508 Wd/W12/R9.3.20. March. 9th. 1920. X 3508. Donnikson's Speedometer. We have sent the Isochronous Speedometer away for repairs and have now received a letter from the Makers stating… | ||
| Scan247 | Proposal for a new carburetter for chassis X.2766 and X.3511, detailing issues with the current design and suggesting improvements. | ||
| View original record | R.R. 235A (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. X.3571. To R. from EH. c. to CJ. c. to E. EH6/LG24.1.19. 24th Jan. 1919. RE CARBURETTER FOR CHASSIS X.2766 X.3511 We should like to submit the… | ||
| Scan248 | Proposed carburetter design, comparing it to other models and listing its five key advantages. | ||
| View original record | R.B. 235a (500T) (S.D. 408. 26-4-17.) Bm. 2/156/13. Contd. -2- EH6/LG24.1.19. By this means it ought to be possible to keep the petrol to air ratio correct for all speeds. One might say that in effect… | ||
| Scan249 | Continued report discussing lubrication with petrol and dust protection for a component under a 'No.2 scheme'. | ||
| View original record | R.R. 255 a (200 T) (S.E. 227. 21-2-18) G. 21-9 -3- EH6/LG24.1.19. Contd. 6. The moving part would be lubricated with petrol which we suggest is better than working in a dry state (No.2 scheme). 7. The… | ||
| Scan250 | Responding to a proposed carburettor design for chassis X.3511. | ||
| View original record | To ER. From E. copy 17th. Mar. 1919. E4/G17.3.19. RE CARBURETTER FOR CHASSIS. X 3511 Referring to your memo concerning the proposed carb- uretter, of which you sent me a blue print, the point about… | ||
| Scan251 | Seeking feedback on a previously sent suggestion for a carburetter with a floating emulsion tube. | ||
| View original record | R.R. 238 a (100 T) (S.E. 557. 21-2-18) C. Fiso To E. From EH. X 3511 EH1/LG4.2.19. 4th. Feb. 1919. Some time ago I sent a note to R. copy to yourself re. a suggestion for a carburetter - I should like… | ||
| Scan252 | Novel carburettor design and the possibility of patenting it. | ||
| View original record | To R. from EH. c.c. to CJ. X.3511. CARBURETTERS. Sometime ago I sent to you a suggestion for a Carburetter, I have since then give much thought to this carburetter and I consider the idea has… | ||
| Scan253 | Letter from R. to EH. discussing a proposed carburetter design, a patent application, and the merits of the existing design. | ||
| View original record | To EH. from R. c. to CJ. c. to SRN. 11th. MAR. 1919. R4/G11.3.19. RE CARBURETTERS. X.3811 With reference to carburetters, the design you propose appears to me to be imperfect in many ways, but if we… | ||
| Scan254 | Letter discussing a carburetter sketch, its lack of patentable novelty, and its potential application and disadvantages for car and aircraft engines. | ||
| View original record | X.3511 To EH. from R. c. to CJ. c. to Sm. R5/G11.3.19. RE CARBURETTERS. With the sketch of the carburetter that you sent us you did not suggest that there were novel features that you thought might be… | ||
| Scan255 | Carburetter design improvements, focusing on constant vacuum, diffuser jets, and various existing models. | ||
| View original record | -2- contd. work being very exacting, apparently because one has to follow the grades in the road and the varying speed depending upon the road dangers. I have sent Mr. Southern a sketch of a… | ||
| Scan256 | Carburettor testing on different engine types and a conclusion on design principles. | ||
| View original record | contd, -3- R5/G11.3.19. ----------- Originally, an RR Carburetter with a moving petrol needle was tested on a two-cylinder engine, and therefore was working at a considerable disadvantage. It was,… | ||
| Scan257 | The design considerations for a moving diffuser jet versus a larger suction chamber, focusing on control and air damping. | ||
| View original record | contd. -4- moving diffuser jet, although it may appear simple, might not be so well controlled as one with a larger suction chamber separately, which can be damped in the way we have done in the past.… | ||