Rolls-Royce Archives
| Identifier | Entry | ||
| scan0001 | Cover page for the 'Lamps & Fittings' section. | ||
| View original record | 8800 EAC.II RR 68 (250T) (DB 925 8-5-25) J.H.D. LAMPS & FITTINGS. | ||
| scan0002 | Instructing against introducing novelties, such as single-pole lamps, into the 'V' Series to maintain similarity with the 'U' Series. | ||
| View original record | X. 9800 To BY from CJ. Copy to Hor. Copy to Hs. Copy to Sg. CJ9/E3/12/24 Referring to BY/Hm2/W29/11/24, addressed to Sg., re side lamps, one had hoped it was understood that there were to be no… | ||
| scan0003 | The introduction of the 'V' Series, focusing on electrical system changes like single pole lamps and earthed wiring. | ||
| View original record | X8800 CO. C.Wor c.Hs. Sg. BY2/H. 4. 12. 24. "V" SERIES. We have made every effort to introduce nothing in the way of novelty which might have been avoided, in producing "V" Series. We have made this… | ||
| scan0004 | Page 2 of a memorandum discussing the conversion to an earthed wiring system. | ||
| View original record | - 2 - BY2/H. 4. 12. 24. ---------------- and Switch Box in the conversion program, then since there is no external difference in the wiring or the lamps, a conversion customer would not be able to… | ||
| scan0005 | Request to obtain two dozen specific headlamp bulbs for use in Lucas headlamps. | ||
| View original record | X.8800 To Wd. from EFC. RE LAMP BULBS FOR LUCAS HEAD LAMPS. We want to obtain some head lamp bulbs exactly similar to some which apparently were supplied in some Lucas head lamps. The marking on these… | ||
| scan0006 | Electrical fittings for chassis 93-NK after 12,235 miles, detailing an issue with rear single point contact bulbs. | ||
| View original record | X8800 Extract from GWHl/Crn8.5.25. Report on chassis 93-NK after 12,235 miles. Electrical Fittings. X8780 Electrical fittings generally are O.K. We are having an epidemic of the rear single point… | ||
| scan0007 | Internal memorandum requesting an order for Sphinx brand side and tail lamp bulbs. | ||
| View original record | To Wd. from EFC. X8800 EFC2/T20.8.25. X.8800. RE LAMP BULBS. Would you kindly order up for use in this Dept. 1 doz. Sphinx L.71 12 volt side lamp bulbs.Double contact. 1 doz. " L.72 12 volt tail lamp… | ||
| scan0008 | Requesting clarification on the standard wattage for headlamp bulbs for 20-HP and 40/50 HP chassis. | ||
| View original record | X8800 To EFC. BY/HEB2/M.7.12.25. 20-HP. AND 40/50 HP.CHASSIS. HEADLAMPS. J.W. We have received a request from Coachbuilders' enquiring whether 24 Watt or 36 Watt Bulbs in the Headlamps are Standard… | ||
| scan0009 | The correct types of lamp bulbs for the New Phantom, 20 HP, and Silver Ghost models. | ||
| View original record | X8800 To BY/C. from EFC. EFC6/T9.12.25. RE: LAMP BULBS. X5800 X3576 The correct bulbs to be used in the 40/50 New Phantom and 20 HP. head lamps are the Lucas bulbs marked :- B.A.S.4.S. 12-14V. 36 W.… | ||
| scan0010 | The exchange of large side lamp bulbs for a smaller preferred type. | ||
| View original record | To Wd. from EFC. X8500 EFC1/T15.12.25. RE SIDE LAMP BULBS. (CENTRE CONTACT) Herewith two 12-14 volt 12 c.p. side lamp bulbs as samples. These I believe have been obtained from Auto Bulbs Ltd. Earlier… | ||
| scan0011 | Letter regarding the return and replacement of incorrectly supplied side lamp bulbs. | ||
| View original record | X8800 My/Mt. c. to D/HP. c. to Ly/Wt. c. to EFC. Wd/JTLO/HP15.12.25. We hand you herewith one dozen Sphinx A.37 12/14 volt, 12 c.p. Side Lamp Bulbs we wish you to despatch to Messrs. Batterby and… | ||
| scan0012 | Lighting system on the New Phantom Car in America. | ||
| View original record | EX. HG. EFC. X8200 EP8/H30.12.25. X8991 re. New Phantom Car in America - Lighting System. We attach herewith a copy of memo which has been received from America. BJ. has asked me to hand you a copy of… | ||
| scan0013 | Letter regarding the high voltage output of the New Phantom's generator and its incompatibility with standard 12-volt light bulbs. | ||
| View original record | OY4/E/121125. COPY. December 11.1925. Mr. Claude Johnson, Rolls-Royce Ltd., London, England. Copy for attention of Works Committee. Dear Sir, re. 12 volt Generator. We find that the New Phantom car… | ||
| scan0014 | Difficulties with the 12-volt generator and lamp bulbs on the New Phantom car in America. | ||
| View original record | X8800 To EP. from EFC. EFC4/T31.12.25. RE NEW PHANTOM CAR IN AMERICA. Reference your EP8/H30.12.25 with attached copy of letter from OY. referring to the 12 volt generator on the New Phantom car. Our… | ||
| scan0015 | Technical discussion on vehicle electrical system voltage, battery charging rates, and lamp longevity on the Phantom generator. | ||
| View original record | Contd. -2- EFC4/T31.12.25. may, and in fact often does, reach 18.5 volts. Insofar as the battery itself can be expected to reach 17 volts, it is clear that it is not altogether a question of the… | ||
| scan0016 | Technical note on battery E.M.F. and charging characteristics. | ||
| View original record | EFC4/T31.12.25. -3- Contd. The battery E.M.F. of 16.8 volts is only quite a temporary E.M.F. due to gases on the plates, and very quickly falls to only 13 volts or so when the charging current goes… | ||
| scan0017 | Requesting agreement to supply information about the New Phantom Car's 12 Volt Generator to America. | ||
| View original record | Hs. X 8800 1 EP/Thn7/H7.1.26. re. New Phantom Car in America - 12 Volt Generator. X8991 X8800 With reference to EFC's memo re above, EFC4/T31.12.25., copy of which was sent to you, we shall be glad to… | ||
| scan0018 | Cause of side lamps burning out, attributing the issue to faulty bulbs from the manufacturer. | ||
| View original record | To Hr. (W/S). from EFC. " By. By/C. " Wd. D/BP. " CY. Ne. " EP. Hm. X8800 EFC4/T23.4.26. X8800 X8783 Will you kindly note the following extract from a letter which I have received from Mr.… | ||
| scan0019 | Investigation into the cause of side lamps burning out, concluding the fault lay with the lamp bulbs, not the dynamos. | ||
| View original record | X8800 C.E.H. (crossed out) Mr. Wormald (crossed out) G.F.G. (crossed out) C. HS. (crossed out) C.F.C. (crossed out) Mr. Brook. (crossed out) BY4/H. 23.4.26. SIDE LAMPS BURNING OUT. X8800 X8782 With… | ||
| scan0020 | Confirming receipt of lamps in relation to Chassis No. 11-EX. | ||
| View original record | S/W. Hs. X.8800 CWB3/GM/30-6-26. Re: Chassis No. 11-EX. Thank you for your Hs1/LG25-6-26. I have now received these lamps. CWB. | ||
| scan0021 | Insufficiency of the lamps on the 10->EX car and the need for a suitable replacement. | ||
| View original record | To DA/EV. from Hs/Rm. X8800 Hs/Rm2/LG19.7.26. LAMPS ON 10->EX CAR. With reference to DA/EV1/M17.7.26. Our experience of the lamps fitted to 10->EX car is that they are insufficiently powerful to give… | ||
| scan0022 | Alternative headlamp options to Lucas, specifically the Carl Zeiss lamp, for the 10-EX model. | ||
| View original record | To Hs. from Da/Ev. X8800 BA/EVL/M23.7.26. RE HEADLAMPS; X.8800. X.1357. X.1369. Referring to Hs/Rm2/LG19.7.26, concerning the lamps on 10-EX, we know of no English lamp which is superior to the Lucas,… | ||
| scan0023 | New headlamp design by Messrs. Lucas, requesting ideas on size and shape. | ||
| View original record | W/S. To C. from Hs. c. Da/Ev. By. X P800 Hsl/T26.8.26. RE HEADLAMPS. Attached herewith letter from Messrs. Lucas. You will note that they are designing a new head lamp and would welcome any ideas we… | ||
| scan0024 | Letter to J. Lucas Ltd. giving feedback and specifications for a new headlamp design. | ||
| View original record | COPY TO HS. X8800 3 "CAMACHA" WEST WITTERING. CHICHESTER. 30th. Aug. 1926. Messrs J. Lucas Ltd. BIRMINGHAM. FOR ATTENTION OF O. LUCAS ESQ. Dear Sirs, X4291 X1369 X1357 re. HEADLAMPS. Our Works inform… | ||
| scan0025 | Short memo confirming arrangements to fit head lamp brackets. | ||
| View original record | To DA/EV. from Hs/Rn. X8800 Hs/Rm3/LG30.12.26. X8774 We thank you for your note of the 22nd. We are arranging to fit the head lamp brackets here. Hs/Rn. | ||
| scan0026 | The supply of Zeiss headlamps and related parts for the 10-EX model. | ||
| View original record | To BY. from EV. c. to Hs. K8800 EV4/2.1.27. RE. HEADLAMPS FOR 10-EX. X.8774 X.1357 X.8800 We send herewith N.sch.2349 which is a full scale drg. of the largest size of Zeiss headlamp such as is to be… | ||
| scan0027 | Extract memo discussing the brightness of side lights and suggesting a reduction in current for parking. | ||
| View original record | X8800 Extract from RL/M11.10.27. (X.4808) "Two or three things occur to me :- (2) Secondly our side lights are uncomfortably bright. My 7-EX has tissue paper paper inside. Chrysler's have tiny lamps… | ||
| scan0028 | Sending a design for a rear number plate and tail lamp to coachbuilders and requesting more lamp holders. | ||
| View original record | BY. Hs. from DA/EV. c. to HN. X.8800 DA/EV3/M4.11.27. RE. EAC.14. REAR NUMBER PLATE. X.4152 X.8800 X.1357 We have sent Messrs. Jarvis & Son Ltd., Barker & Co.Ltd., and Hooper & Co.Ltd., a design for… | ||
| scan0029 | Returning a new sample Lucas lamp for a decision on its retention or modification. | ||
| View original record | HS. FROM RS. X8800 RS1/M10.11.27. We have today returned the new sample Lucas lamp to you, for you to do as you think best with it - i.e. either keep it at Derby, or send it on to Messrs Lucas' for… | ||
| scan0030 | Insufficient dynamo output for 20HP and 40/50 models, with proposed solutions. | ||
| View original record | EFC. ) FROM R. HS. ) (At Le Canadel.) E. ) C. to BJ. WOR. PN. C. BY. OWB. SG. [STAMP] ORIGINAL [HANDWRITTEN] X8800 R5/M9.3.28. REC'D, & DESPATCHED FROM WW. 13.3.28. 20HP. & 40/50. INSUFFICIENT DYNAMO… | ||
| scan0031 | 9000-mile test of an experimental auto charge control switch and lighting system on a Phantom chassis with a sports body. | ||
| View original record | X/8800 Extract from Hs/GWH/LG17.3.28. REPORT ON 15-EX. PHANTOM CHASSIS WITH SPORTS BODY 9000 MILES. EXPERIMENTAL AUTO CHARGE CONTROL SWITCH. LOP.D.71499. The control of the charging of the battery by… | ||
| scan0032 | Note specifying the lamps fitted to a chassis ready for delivery from the Test Dept. | ||
| View original record | X.8800. 30.4.28. Chassis ready for delivery in the Test Dept. have Klaxons and temperature lamps fitted but no head, side, tail or body lamps. These are all dealt with by the body-builders. F.J.A. | ||
| scan0033 | Current taken by side lamps and a recommendation for a specific low wattage bulb. | ||
| View original record | W/S. C. R. X8800 EFC2/T4.5.28. RE CURRENT TAKEN BY SIDE LAMPS. X1369 You will have noted that Mr. Royce has expressed the desire on one or two occasions that we should provide, and/or recommend… | ||
| scan0034 | Replacement of 9-watt side lamp bulbs with ones that take less current. | ||
| View original record | S/W. Copy to R. X8800 Sg4/CM7.5.28. Re - Current taken by Side Lamps. We are in receipt of EFC2/T4.5.28. When Mr. Royce was here the other day he referred to this matter and, as the result, we are… | ||
| scan0035 | Standardization of side lamp bulbs to a lower capacity model at Mr. Royce's request. | ||
| View original record | To Hs/AJL. X8800 EFCl/T9.5.28. You may know that Mr. Royce has been very anxious that we should use the minimum capacity side lamp bulb. Accordingly we have suggested to Sales and they have agreed to… | ||
| scan0036 | Issues with fitting a special Lucas R.160.S. lamp to the Phantom model. | ||
| View original record | X8800 SECRET. By. } FROM DA/EV. OX. } C. to Sg. G. Hs. PHANTOM - THIRD LAMP SCHEME. DA/EV1/M7.6.29. X8800 X4520 Sales are asking us to provide a bracket to support a special Lucas R.160.S. lamp as the… | ||
| scan0037 | The positioning and brackets for Phantom headlamps. | ||
| View original record | X8500 S/W. (Copy to Dr/MV). [crossed out] (" " Hs). [crossed out] (" " [illegible]). [crossed out] Sg9/M/30.7.28. Re: Phantom Headlamps. Referring to Sg5/M/13.7.28. giving the new position desired for… | ||
| scan0038 | Request for a report on two sample headlamps referred to in an attached letter from Philips Lamps Ltd. | ||
| View original record | Hs. (Experimental) X8800 ROY/MS6/P.5.3.29. Nottingham. Re attached letter from Philips Lamps Ltd., Will you please let us have your report on the two sample Headlamps referred to. ROY ENCLOSURE Nº 512… | ||
| scan0039 | Returning incorrect lamp bulbs which were not the bifocal type as requested. | ||
| View original record | ROY/MS. from EFC. X8800? EFC2/LG7.3.29. LAMP BULBS. With reference to ROY/MS6/P5.3.29. These lamp bulbs were handed to Roy. for return under cover of our note EFC1/T10.11.28. pointing out that these… | ||
| scan0040 | Issues with overlapping orders and the supply of obsolete lamps for cars. | ||
| View original record | X8800 To DA/EV. from Hs/Rm. Hs/Rm4/LG22.4.29. LAMPS. X7800 We still seem to be inclined to overlap with London in getting lamps for the cars. Will you please let us have a specification of the lamps… | ||
| scan0041 | Proposal to trial a new Lucas centre lamp as a replacement for the Stephan Grebel model on Phantom cars. | ||
| View original record | Hs. from DA. c. Sg. c. C. CX. X 8800 DA4/M23.5.29. LUCAS LAMP - TYPE R.160 S.D. X1357 X7800 X 8800 We are sending you a sample of one of these lamps which has been submitted to us by Messrs. Lucas,… | ||
| scan0042 | Blueprint and production of a modified Centre Lamp Bracket stay with increased thickness. | ||
| View original record | x8800 RHO. Hs/Rm. BY/5/N.21.9.29. Re: Centre Lamp Bracket - 40/50 HP. Chassis. Section 8280. Please receive herewith blueprint of D.72405- Stay for Centre Lamp which has had its thickness increased by… | ||
| scan0043 | Request to produce two modified centre lamp stays for a 40/50 chassis for comparison with the standard bracket. | ||
| View original record | C. Hs/Rm. X8800 BY/RD4/AL.24.9.29. 40/50 CHASSIS - HEAD LAMP - SEC:8200. Will you please put in hand two centre lamp stays to D.72404 (Blueprint herewith) having a deeper section as well as a thicker… | ||
| scan0044 | Testing of new type steel artillery wheels for the 40/50 HP chassis. | ||
| View original record | To B.J. from Hs. c. to BY. c. to C. (For C.S.C.) 48810 Hs4/LG30.12.24. 40/50 HP. NEW TYPE STEEL ARTILLERY WHEELS. +4586 It is not our desire to complicate tests on 'V' series chassis with steel… | ||
| scan0045 | Investigating the causes of high-speed steering wobbles. | ||
| View original record | R.R. 498A (50 H) (D.D. 91. 12-6-25) J.H.D. EXPERIMENTAL REPORT Expl. No. X8870 REF Hs/Bm2/L G15. 9.25 To R. from Hs/Rn. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. HIGH SPEED STEERING WOBBLES.… | ||
| scan0046 | Investigating the causes of wheel wobble, focusing on tyre imbalance and deflection. | ||
| View original record | R.R. 498a (50 M) (D.D. 21. 12-6-25) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF: Hs/RM2/LGLB.9.25. [Diagram of a car axle with wheels and an indicator gauge] INDICATOR. we had anticipated from the… | ||
| scan0047 | Investigations into high-speed wheel wobble using a Phantom car. | ||
| View original record | R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF: Hs/Rm2/LG15.9.25. on the tyres, the wobbles instantly vanished completely. This was with balanced tyres. We repeated… | ||
| scan0048 | The causes and contributing factors of tyre wobble, such as damping, tread pattern and road surface conditions. | ||
| View original record | EXPERIMENTAL REPORT. -4- Expl. No. REF: Hs/Rm2/LG15.9.25. takes place. We believe the damping of the tyre is also important, but in addition that we shall now find the nature of its tread pattern to… | ||
| scan0049 | Weight reduction efforts on the Phantom chassis. | ||
| View original record | To Hs. from R. c. to CJ. BY. 48810 R5/M29.9.25. RE. PHANTOM WEIGHTS. X. 8840 X. 8810 I am very pleased to hear that we are on the way towards considerable reduction in the weight of this chassis. 1… | ||
| scan0050 | Technical memorandum detailing modifications to pistons, steering, axles, dampers, and magnetos. | ||
| View original record | To Hs. BY. } FROM R. To DA. E. } EFC. X 8810 R3/M14.5.26. PHANTOM. X.8770 X.8420 X.8820 X.8810 X.235 PISTONS. We have modified the engine pistons in 3 patterns to get over some of the troubles and… | ||
| scan0051 | Internal discussion on vehicle design choices, features, and cost implications for future models. | ||
| View original record | contd :- -2- the contact spring pressure sound, and al together we should go very slowly before abandoning the Watford which has proved very reliable and has a better reputation. We must not forget… | ||
| scan0052 | Continued document outlining future hopes for manufacturing improvements and cost savings on chassis. | ||
| View original record | contd :- -3- WHAT HOPES FOR THE FUTURE. Slight manufacturing improvements in design, considerable saving at the Works on cost of production, and thirdly probably considerable saving in the cost of the… | ||
| scan0053 | Proposing a reduction in the width of standard wire wheels for the Phantom model. | ||
| View original record | BY. from DA. c. to BJ. Hs. V8810 DAL/Ml.10.27. NARROWER WIRE WHEELS - PHANTOM. X.421 X.8810 X.4586 X.3580 X3725 Herewith we send N.sch.2477 shewing a proposal for reducing the width of the standard… | ||
| scan0054 | Drawing showing the wheel arch clearance for the Phantom sports chassis. | ||
| View original record | (8810) BY. Hs. from DA/EV. DA/EV1/25.10.27. EAC.14. X. 8774 X. 8810 We send herewith a drg. shewing the wheel arch clearance for the Phantom sports chassis. The distance between the wheel arch is… | ||
| scan0055 | From 'R.' questioning why the company does not use smaller road wheels on its cars. | ||
| View original record | 48810 Hs. from R. c. to BJ. BY. R3/M14.5.28. X.7810 ROAD WHEELS. X.8810 X.5810 Why cannot we see a RR. car with smaller road wheels? R. | ||
| scan0056 | Steering improvements, wheel shimmy, side steering tube springs, and new adjustable dampers. | ||
| View original record | To OY. from Hs/Rn. We are glad to hear you find the wheels further out from centre point a steering improvement. We have had a number of American owners over here during the summer, they seem to think… | ||
| scan0057 | Letter discussing the shimmy effect, moment of inertia, and specifications for 20-inch wheels and tires. | ||
| View original record | X88107 ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. OY3.R.9.17.28 September 17th, 1928. Mr. Robotham, Rolls Royce Ltd., Derby, England. Dear Mr. Robotham: WHEELS & TIRES Regarding your recent memo… | ||
| scan0058 | List of weights and specifications for different types of tires and wheels. | ||
| View original record | OY3.R.9.17.28 -2- September 17th, 1928. 33 x 6.75 U.S. ribbed tread S.S. tire on American wire wheel and inner hub without brake drum - 2.79 units Weight of wheel and tire - 87 lbs. (without inner… | ||
| scan0059 | Comparison of the power output at the road wheels for the Phantom and S.S. cars. | ||
| View original record | X8810 To EP. from Hs/AJL. c. to Wor. MX. Hs/AJL.2/MJ.22.8.29. X.7810 (print) X.8810 POWER AT ROAD WHEELS, PHANTOM AND S.S. We give herewith a comparison of the power output at the road wheels obtained… | ||
| scan0060 | Confirming the standardisation of the 20-inch rim and 'Fort' type tyre for the L.2. series. | ||
| View original record | ROY. c. Sft. c. Hs. C. D/BP. c. G. Dept. c. F. Dept. c. D. Dept. X8810 By 9/G3.2.30. X.4554 X.8810 X.8820 WHEELS AND TYRES - SECOND HALF OF L.2. SERIES. Will you please note that the Experimental… | ||
| scan0061 | Decision on wheel and tyre specifications for the L.2B series vehicles. | ||
| View original record | W/S. (C). c. Hs. c. D/BP. Y 8810 BY/Cghl/G.4.2.30. X.4552 X.8810 X.8820 SECOND HALF OF L.2 SERIES - WHEELS & TYRES. Please note that the 20" rim has been decicded upon as the correct size of wheel for… | ||
| scan0062 | Requesting an alteration to six wheels to increase the vehicle's track. | ||
| View original record | O.O. From Hs/Rm. X8810 Hs/Rm.4/WJ.14.2.30. X3725 X8810 You will recollect that on the 3rd. of May 1929, we ordered a pair of 21" rims from the Dunlop Co., having the rim moved outwards .50" in… | ||
| scan0063 | Accompanying a blueprint for a new wheel, G.78339, for the 40/50 HP Chassis. | ||
| View original record | X8810 To RHC. c. HS/Rn. BY./TWD1/E.21.2.30. 40/50 HP. CHASSIS. X.3725 X.8810 REAR HUB. SECTION 6170 FRONT AXLE & BRAKES. SECTION 7040 Please receive herewith one blue print of the following:- G.78339.… | ||
| scan0064 | Secret memorandum on the design and high-speed testing of balloon tyres for the E.A.C.11 model. | ||
| View original record | X8820 To B.J. from Hs. S E C R E T. Hs5/LG17.10.24. X8820 E.A.C.11. - BALLOON TYRES. X8820 X8430 X4565 The EAC.11 will be designed suitable for fitting balloon tyres. The steering on the EAC.11. is… | ||
| scan0065 | Note detailing a reduction in tyre section for the wheels and tyres of the 20 HP car. | ||
| View original record | contd :- -2- wheels and tyres for the 20 HP. in which the section of the tyre has been slightly reduced from those which have been on Mr. Royce's 20 HP. car. Hs. | ||
| scan0066 | The causes of high-speed steering wobbles. | ||
| View original record | R.R. 495A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. Expl. No. +8820 REF Hs/Bm2/L.G18.9.25. To R. from Hs/Rm. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. HIGH SPEED STEERING… | ||
| scan0067 | Tests and observations on wheel wobble. | ||
| View original record | R.R. 495A (50 H) (D.D. 91. 12-6-25) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF Hs/Rm2/LG18 9.25. (4) Out of balance in the proportions likely to be met with in practice is quite incapable of… | ||
| scan0068 | The effects of wheel toe settings on vehicle wobble. | ||
| View original record | R.R. 493A (50 H) (D.D. 31. 12-6-25) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF Hs/Am2/LG18.9.25. (7) When the wheels are given an excess of toe in the wobbles becomes worse - when a toe out, they… | ||
| scan0069 | The mechanics of a self-exciting, high-speed wheel wobble. | ||
| View original record | R.R. 498a (50 H) (D.D. 31. 12-6-25) J.H.D. EXPERIMENTAL REPORT. -4- Expl. No. REF :Hs/Rm2/LG18.9.25. the wheel manage to give the axle a minute criss cross movement. This little movement is… | ||
| scan0070 | Analysing high-speed wheel wobble, gyroscopic couple, and potential solutions. | ||
| View original record | R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. -5- Expl. No. REF Hs/Rn2/LG18:9.25. other than its natural period. Section 2. of the report is explained as follows. When water is… | ||
| scan0071 | The performance of rear springing and tyres for the 7-EX car, with recommendations for semi-balloon tyres and hydraulic shock dampers. | ||
| View original record | 18820 To Hs. ) FROM R. BY. ) LE CANADEL. DA. ) c. to CJ. BJ. RG. R1/M4. 2.26. RE. REAR SPRINGING - TYRES. X.8410 X.457 X.8992 X.8820 X.4117 X.235 7-EX R&R CAR AT LE CANADEL. I find the springing on… | ||
| scan0072 | Technical memo discussing potential improvements for the Phantom model's rear springs, shock dampers, and tyres. | ||
| View original record | Hs. ) To BY. ) FROM R. Da. ) LE CANADEL. c. to CJ. BJ. LHS. c. to PN. EP. CWB. Wor. 48820 R2/M15.3.26. PHANTOM - X.8410 X.8820 RE. ROAD SHOCKS. X.8520 X.8830 REAR SPRINGS. X. 8410 I do not think we… | ||
| scan0073 | Improvements to vehicle ride quality through adjustments to tyres, cushions, shock dampers, and springs. | ||
| View original record | contd :- -2- very tight indeed. So, to me the quicker we realise that we must supply something different, the better. I am definitely of the opinion that in my experience where the cars are, all… | ||
| scan0074 | Unsatisfactory ride quality in the rear seats of a Phantom model, with suggestions for modifications to springs, dampers, and tyres. | ||
| View original record | Hs. To BY. EA. } FROM R. AT LE CANADEL. X8820 R3/M19.3.26. PHANTOM. UNSATISFACTORY RIDING IN REAR SEATS. X. 8410 X.235 X. 8820 Yesterday I wrote a long memo. on the above subject: today (14.3.26) I… | ||
| scan0075 | Proposing the adoption of larger, lower-pressure tyres to improve ride comfort and compete with other manufacturers. | ||
| View original record | Hs. ) To DA. ) FROM R. BY. ) LE CANADEL. c. to CJ. BJ. c. to E. RG. X8820 R1/M24.3.26. PHANTOM & INDIA TYRES - re. X.4565 X.8820 Hs/Rm/15.3.26. X.3809 X.5820 X.8410 I have said previously that we… | ||
| scan0076 | Car suspension, tyres, and shock dampers. | ||
| View original record | To Hs. } FROM R. DA. } LE CANADEL. BY. } c. to CJ. BJ. Wor. c. to E. RG. PN. c. to OY. NA. CWB. X8820 RL/M31.3.26 SUSPENSION AND TYRES X.8410 X.5520 OF RR. CARS. X.8820 X.235 X.8430 X.5410 My last… | ||
| scan0077 | Vehicle suspension, tyre performance, and handling characteristics for various models. | ||
| View original record | contd :- -2- (c) Such shock dampers as we tried to fit to the 20 HP. i.e. progressively increasing, small movement with no damping, and larger movement with increased effect. (6) One wonders whether… | ||
| scan0078 | Steering, tyre, shock absorber, and suspension design. | ||
| View original record | contd :- -3- set and equal each way). (c) All the ball joints in the steering gear - i.e. 3 or 4 could have lignum vitae pads spring loaded so as to create friction (consistently) and be independent… | ||
| scan0079 | High speed steering wobbles experienced on car 7-EX with medium pressure tyres. | ||
| View original record | To Hs. & DA. from R. at Le Canadel. c. to CJ. BJ. 28820 R2/M2.4.26. RE. HIGH SPEED STEERING WOBBLES. X.457 X.235 7-EX MEDIUM PRESSURE TYRES. X.4565 X.8820 On car 7-EX we find we get these at the… | ||
| scan0080 | Technical memo detailing modifications and test results for various vehicle components including pistons, steering, axles, and magnetos. | ||
| View original record | To Hs. BY. } FROM R. To DA. E. } EFC. 48820 R3/M14.5.26. PHANTOM. X.8770 X.8420 X.8820 X.8810 X.235 PISTONS. We have modified the engine pistons in 3 patterns to get over some of the troubles and make… | ||
| scan0081 | Design choices for chassis components, balancing cost against performance and market requirements. | ||
| View original record | contd :- -2- the contact spring pressure sound, and altogether we should go very slowly before abandoning the Watford which has proved very reliable and has a better reputation. We must not forget… | ||
| scan0082 | Hopes for future improvements and cost savings related to chassis design and production. | ||
| View original record | contd :- -3- WHAT HOPES FOR THE FUTURE. Slight manufacturing improvements in design, considerable saving at the Works on cost of production, and thirdly probably considerable saving in the cost of the… | ||
| scan0083 | Test results and recommendations for Phantom model improvements regarding tyres, steering, and suspension. | ||
| View original record | To BJ. ) Hs. ) FROM R. c. to Wor. RG. CWB. c. to BY. FN. OY. Mr. Fuller. X8820 R2/M29.5.26. PHANTOMS - MEDIUM PRESSURE X.457 TYRES AND STEERING. X.8320 X.8430 X.8450 (1) Providing the hydraulic… | ||
| scan0084 | Advantages and disadvantages of offering low pressure tyres for Phantom & Goshawk chassis. | ||
| View original record | To BY. ) FROM R. BJ. ) c. to Wor. Hs. CWB. c. to FN. DA. E. X8820 R3/M3.9.26. PHANTOM & GOSHAWK LOW PRESSURE TYRES. X.4565 X.8820 X.8430 X.5820 Regarding Hs. memo. concerning the above, I agree that… | ||
| scan0085 | Instruction arranging for the collection of tyres and wheels from Lillie Hall. | ||
| View original record | W/S. To Bk. from Hs/AJL. X6820 X8950 Hs/AJL/LG28.10.26. We are sending a car tomorrow (29.10.26) to collect the tyres and wheels off 88-LC from Lillie Hall. Will you please instruct Lillie Hall to… | ||
| scan0086 | Tyre recommendations for a high-speed chassis, advising high-pressure tyres. | ||
| View original record | To BY. from Hs/Rm. C. to C. - PN. CWB X8820 Hs/Rm2/LG8.1.27. TYRES. X4565 X4050 In connection with the chassis ordered specifically for high speed work, we consider that the customer should be advised… | ||
| scan0087 | Introduction and performance of new silent tread tyres. | ||
| View original record | R. from Hs. c. to BJ. Wor. c. to E. DA. c. to BY. 48820 Hsl/LG9.10.28. CAR TYRES. X. 8820 X.582P X.4050 Phantom cars are now being despatched with tyres having silent treads. These are the 6.75" on… | ||
| scan0088 | The standardisation of 20' rims and 'Fort' type tyres for the L.2. Series. | ||
| View original record | ROY. c. Sft. c. Hs. C. D/BP. c. G. Dept. c. F. Dept. c. D. Dept. x88~ By.9/G3.2.30. & X.4554 X.8810 X.8820 WHEELS AND TYRES - SECOND HALF OF L.2. SERIES. Will you please note that the Experimental… | ||
| scan0089 | The decision on wheel and tyre specifications for the L.2B series. | ||
| View original record | W/s. (C). c. Hs. c. D/BP. X8820 BY/Cghl/G.4.2.30. X. 4552 X. 8810 X. 8820 SECOND HALF OF L.2 SERIES - WHEELS & TYRES. Please note that the 20" rim has been decicded upon as the correct size of wheel… | ||
| scan0090 | Increasing the tyre balance weights for the 40/50 car to match the 20 HP standard. | ||
| View original record | BY. From Hs/Rm. x8820 Hs/Rm.2/MJ.22.2.30. x8840 Since we have been able to increase the number of balance weights on the 20HP. car, we think we should do the same thing on the 40/50 as this will… | ||
| scan0091 | Comparison of vehicle weights and braking performance for 40/50 HP cars and a Hispano Suiza. | ||
| View original record | X8840 X4214 X200 X226 To DA. from Hs/Rm. Hs/Rm1/LG15.11.23. In reply to your Dal/M13.11.23., the following are the weights of two representative 40/50 HP. cars and the Hispano Suiza - all without… | ||
| scan0092 | Secret memorandum discussing potential improvements for an engine and chassis across eight points. | ||
| View original record | To E. DA. HS. FROM R. c. to CJ. BJ. Wor. RG. PN. BY. X8840 SECRET. R1/M10.3.24. E.A.C.11. X.8770 X.8840 X.9770 X.9930 X.9080 X.9070 X.8080 X.8070 (1) Can we improve the engine generally with disc… | ||
| scan0093 | Improvements for silencers, clutches, and brakes, alongside a motivational call to action. | ||
| View original record | contd:- -2- noises mean I think a longer silencer with more baffles. Cutout means a through pipe and butterfly valve or valves (as Goshawk here) which is extremely good and pleasing - i.e. more power… | ||
| scan0094 | Secret memo from Mr. Royce regarding the weight of the crankcase and a request to investigate reducing its wall thickness. | ||
| View original record | To BY. from E. c. to CJ. HS. +8840 [handwritten] S E C R E T. E3/M3.6.24. EAC.11. WEIGHT OF CRANKCASE. X.9000 [struck through] X.8000 [handwritten] X.9930 [struck through] X.8840 [handwritten] It is… | ||
| scan0095 | The weights of the components for an EAC.11 radiator. | ||
| View original record | R.R. 493A (20H) (D.A. 652 20-3-24) J.H.D. EXPERIMENTAL REPORT. X8840 Expl. No. REF: Hs1/LGG.11.24. To R. from Hs. c. to CJ. c. to E. SECRET. X8840 EAC.11. RADIATOR. X8250 Below are the weights of the… | ||
| scan0096 | Spring deflection and ground clearance for 'V' Series EAC cars under 'normal' and 'loaded' conditions. | ||
| View original record | R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. X8840 REF: Hs3/LG16.5.25. To BJ. from Hs. 'V' SERIES EAC. 'NORMAL' AND 'LOADED' CAR. Handwritten: X8770 (crossed out), X8410… | ||
| scan0097 | Querying the comparative weights of Dunlop and Rudge-Whitworth front axle hubs for the New Phantom model. | ||
| View original record | To Hs. from DA. +8840 DA1/M19/9.9.25. NEW PHANTOM. X.3580 X.8840 X.8420 X.421 Referring to the list of comparative weights on the front axle you supplied me with. I do not fully understand the last… | ||
| scan0098 | Progress of weight reduction on the Phantom chassis. | ||
| View original record | To Hs. from R. c. to CJ. BY. X8840 R5/M29.9.25. RE. PHANTOM WEIGHTS. X. 8840 X. 8810 I am very pleased to hear that we are on the way towards considerable reduction in the weight of this chassis. 1… | ||
| scan0099 | Weight-saving campaign for the New Phantom, comparing performance with Bentley and Hispano models. | ||
| View original record | To CJ. from R. c. to BJ. BY. c. to Hs. X8840 R2/M13.10.25. NEW PHANTOM WEIGHT. X.8840 X.3805 I think that we should increase the vigour of our campaign on weight saving on the New Phantom, not that we… | ||
| scan0100 | Weight reduction for the 'Phantom' model, comparing long and short chassis types. | ||
| View original record | R.R. 498A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. Expl. No. +8840 REF Hsl/LG15.10.25 To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. REDUCTION IN WEIGHT ON 'PHANTOM'.… | ||
| scan0101 | Use of duralumin rockers and bearing caps to reduce weight on the 'Phantom' model. | ||
| View original record | To R. from Hs. c. to CJ. BJ. c. to E. BY. +8840 Hs2/LG15.10.25. RE. 'PHANTOM' WEIGHT. X. 8840 X. 3805 X. 8090 Bentley's are using duralumin rockers on both their models. It might be considered worth… | ||
| scan0102 | Requesting a comparison of weights for the 20 HP axle and the 40/50 HP rear brake unit against other specified parts. | ||
| View original record | +8840 To RHC. from Hs. Hs3/LG28.10.25. Dictated by Hs. but not seen. We should like to remind you as regards the weights of the 20 HP. axle compared with the India front axle. Also the weights of the… | ||
| scan0103 | Weights of the EAC cylinder block and head. | ||
| View original record | To BY/C. from Hs/Rm. Stamped: X 8840 Hs/Rm1/LG10.11.25. EAC. CYLINDER BLOCK. With reference to your enquiry re. the weights of the present EAC. Cyl. block and head. Herewith the following information… | ||
| scan0104 | Weights of the EAC cylinder block and head. | ||
| View original record | To BY/C. from Hs/Rm. +8840 Hs/Rm1/LG10.11.25. EAC. CYLINDER BLOCK. +8050 With reference to your enquiry re. the weights of the present EAC. Cyl. block and head. Herewith the following information :-… | ||
| scan0105 | Weight-reducing campaign for Phantom brake drums, suggesting the deletion of ribs. | ||
| View original record | To Hs. from R. c. to CJ. Y8820 R2/M18.11.25. PHANTOM BRAKE DRUMS - WEIGHT REDUCING CAMPAIGN. X. 8840 X. 8350 We are not sure, but we think you proposed deleting the ribs on the large brake drums on… | ||
| scan0106 | From Mr. Royce detailing proposals for reducing the weight of the Phantom engine. | ||
| View original record | To BY. & HS. from R. c. to CJ. X8840 E1/M21.11.25. RE. REDUCING WEIGHT OF PHANTOM ENGINE. X. 8840 X. 8770 With regard to the above question it is considered by Mr. Royce that the alterations for… | ||
| scan0107 | List of proposed alterations and simplifications for an engine's crankcase, studs, and valve gear cover. | ||
| View original record | contd :- -2- (12) Cancel the cast alum. tube and flanges surrounding the oil pump drive in the lower half crankcase. (13) Cancel the top and bottom cored holes in the front feet of the crankcase and… | ||
| scan0108 | With a sketch discussing design modifications for an aluminium head, crankcase, and valve tappet rods. | ||
| View original record | contd :- -3- JOIN IN THESE ANGLES TO COME HALF WAY ACROSS AT EACH END. Regarding the drawing of the aluminium head you have sent us we think the drilled boss for the valve tappet rod is better than… | ||
| scan0109 | Plans to lighten a Phantom engine without a major redesign, comparing its weight to the Silver Ghost. | ||
| View original record | To BY. from R. c. to CJ. Hs. 48840 R3/MB.12.25. EAC.7. & 8. X.7770 X.280 X.8840 X.7840e One of these chassis will have a lightened engine. I have arranged with E. that we do not attempt to re-design… | ||
| scan0110 | List of 14 proposed alterations to reduce the weight of the Phantom engine. | ||
| View original record | X8840 To BY. from E. c. to CJ. Hs. E1/M9.12.25. RE. REDUCING WEIGHT OF PHANTOM ENGINE. X. 8840 X. 8770 With reference to our memo. E1/M21.11.25., Mr. Royce has decided to revise the policy laid down… | ||
| scan0111 | Weight reduction opportunities and material choices for engine components, specifically referencing the Phantom engine. | ||
| View original record | contd :- -2- (15) See what weight can be removed from the timing gears by alteration to material and design. (16) See what further weight can be removed from flywheel and clutch. (17) See what… | ||
| scan0112 | Weight saving on modified New Phantom rear brake drums. | ||
| View original record | 48840 To Hs from RHC. RHC20/BE. 15.1.26. RE NEW PHANTOM REAR BRAKE DRUMS The 40/50 Rear Brake Drums which have been modified to take the Goshawk type Squeak Dampers give a saving in weight of 5 lbs… | ||
| scan0113 | Replacement and comparison of rear springs for 7-EX, 20 HP, and 40/50 HP cars. | ||
| View original record | To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to PN. CWB. c. to OY. X 8840 Hs2/LG22.1.26. SPRINGING. X8840 X8410 X5410 We have sent by rail addressed to you at Le Canadel a 1600 lbs. rear… | ||
| scan0114 | Springing complaints for the 40/50 HP and 20 HP models, comparing suspension performance and customer feedback. | ||
| View original record | contd :- -2- is 92 to 96 oscillations per minute. On the 40/50 HP. it is 72 to 75 oscillations per minute. In spite of the fact that the 40/50 is sprung relatively lighter than the 20 HP., the… | ||
| scan0115 | Frame deflection and springing problems causing passenger discomfort, with proposals for testing. | ||
| View original record | contd :- -3- In the case of your own car at Le Canadel, we have wondered whether some of the discomfort is due to the flexibility of the over-hung portion at the rear of the frame. The fact that we… | ||
| scan0116 | Continued memo critiquing the car's springing system in comparison to the Lancia Lambda. | ||
| View original record | contd :- -4- either the semi-eliptic or cantilever springs, or the movement of the frame. My own impression is that the springing is now the worst feature on our cars. We consider the front springing… | ||
| scan0117 | Comparison of springing, load, and weight calculations for the 20 HP and 40/50 HP models. | ||
| View original record | Hs/Rm/LG22.1.26. ------------------ 20 HP. AND 40/50 HP. SPRINGING. The following peculiarities are observed :- VARIABLE LOAD. On the 20 HP. half the weight of the passengers is sprung. On the 40/50… | ||
| scan0118 | Specifications for spare wheel weights and associated spring adjustments for 20 HP and 40/50 HP models. | ||
| View original record | -2- a spare wheel is assumed to have its weight distributed 65% front and 33% rear. On the 20 HP. however, its weight is assumed to be 100% on the front when carried on the step. ABROAD. The 40/50 HP.… | ||
| scan0119 | Calculation sheet for the spring loads of a 7-EX Phantom car scheduled for running in France. | ||
| View original record | 7-EX - PHANTOM CAR. SPRINGS REQUIRED IF SPRUNG ACCORDING TO SCHEDULE FOR RUNNING IN FRANCE. | FIXED CHASSIS LOADS. (As per chart) | SPRINGS. | | | FRONT. | REAR. | | | Near. | Off. | Near. | Off. |… | ||
| scan0120 | Comparison of rear spring deflection under full load for 20 HP and 40/50 HP cars. | ||
| View original record | SPRINGING. The 20 HP. car rear springs under full load have a deflection of 5.125". This leaves the spring with a flat camber. The 40/50 HP. car rear springs under full load have a deflection of 6".… | ||
| scan0121 | Specification sheet detailing spring loads and calculations for the New Phantom and 20 HP models. | ||
| View original record | NEW PHANTOM SPRINGING FIXED LOADS CHASSIS WT. 4000 LBS. UNSPRUNG WT. FRONT. AXLE WHEELS & TOTAL WT. OF THE SPRINGS TOTAL WT. 460 LBS. REAR. AXLE WHEELS & NONE OF THE WT. OF THE SPRINGS TOTAL WT. 610… | ||
| scan0122 | Table of weights for various car models, broken down by front, rear, and total weight. | ||
| View original record | X8840 26.1.26. X453-8 CAR WEIGHTS. Below we give particulars of weights of cars as specified :- CAR | FRONT. | REAR. | TOTAL. | REMARKS. Tons. cwts. qrs. lbs. | Tons. cwts. qrs. lbs. | Tons. cwts.… | ||
| scan0123 | Outlining the value of using an aluminium head and cylinders for the Phantom Engine. | ||
| View original record | To Hs. )FROM R. & E. BY. )LE CANADEL. c. to CJ. +8840 R4/M8.2.26. PHANTOM ENGINE. X. 8770 X. 8840 X. 8050 The aluminium head and cylinders should be made to shew the value of :- (1) Weight saving. (2)… | ||
| scan0124 | Listing the weights of the new Phantom rear axle components. | ||
| View original record | X8840 To Hs from RHC. RHC3/BE. 11.2.2.6. RE NEW PHANTOM REAR AXLE We give below weights of the above Rear Axle. Weight of Rear Axle complete (less Road Wheels) and less Propeller Shaft. 436.187 lbs.… | ||
| scan0125 | Requesting the unladen weights and details of any spring alterations for the London Trials cars. | ||
| View original record | +8820 W/S. To C. from Hs/Rn. Hs/Rn3/LG1 8.2.26. X8950 Will you please let us have the unladen weights of the present London Trials cars. We should also like to know whether any spring alterations have… | ||
| scan0126 | Request for the weights of the 40/50 HP and 20 HP trials cars when fully equipped. | ||
| View original record | 18840 18950 W/S. to C/BK. from Hs/Rm. Hs/Rm1/LG20.2.26. In reply to C/BK7/LH19.2.26. We should like the weights of both the 40/50 HP. and 20 HP. Trials cars. The weights we require are those of the… | ||
| scan0127 | Test on a Phantom engine with old short rods to save weight and reduce crankcase height. | ||
| View original record | To Hs. from E. c. to CJ. c. to R. c. to RG. c. to BY. X8840 E2/M23.2.26. RE. LIGHTER PHANTOM ENGINE. X. 8840 X. 8000 X. 8030 In our memo. E1/M21.11.25 we asked for a test to be made of a Phantom… | ||
| scan0128 | Providing the weights of three trial cars, with a handwritten note regarding their springs. | ||
| View original record | Jessop S to W Hs/Rm C/Bk9/LH24226 re Weights of trials cars ----------------------- With further reference to your Hs/Rm1/LG20226., we have secured the weights of the following cars. :- 101-MC. 40/50… | ||
| scan0129 | Responding to a request for the weights of trials cars, providing some preliminary figures. | ||
| View original record | 1804 S to W Hs/Rm C/Bk8/LH22226 We thank you for your Hs/Rml/LG20226. Most of the trials cars are, at present, out of town, and it will be necessarily a few days before we can let you have the weights… | ||
| scan0130 | Spring poundage for G.R. Minchin's car and London Trials Cars. | ||
| View original record | Hs/Rm. Mx.Dept. Mx is absent. Mxc/McM5/MC20.2.26. Re: Hs/Rm2/LG18.2.26. The poundage of the springs fitted to G.R. Minchin's car 119-MC Front, near 1100, off 1150. Rear,near 1806,off 1903. and London… | ||
| scan0131 | Putting a hold on the Lightened Phantom Engine for modifications and asking for suggestions on a short rod proposal. | ||
| View original record | To Hs. C. Mr. Shelton. C. RHO. X8840? [Handwritten] BY2/K. 26. 2. 26. LIGHTENED PHANTOM ENGINE. X8840? [Handwritten] I attach a copy of E1/M23.2.26., in which E. asks us to hold up work on the above… | ||
| scan0132 | Proposed modifications to the Phantom engine, specifically regarding pipe fittings and sparking plug placement. | ||
| View original record | COPY. TO BY. FROM E. PHANTOM ENGINE. Referring to Mr. Royce's memo. R4/M8226., I am working out the particulars referred to, and hope to let you have them some time this week. They consist of… | ||
| scan0133 | Testing a Phantom engine with shorter rods to reduce weight and crankcase height. | ||
| View original record | C O P Y. TO HS. FROM E. E2/M23.2.26. Copy to - CJ. " R. " RG. " BY. re. LIGHTER PHANTOM ENGINE. In our memo. E1/M21.11.25., we asked for a test to be made of a Phantom engine with the old short rods,… | ||
| scan0134 | Investigation into the suspension balance differences between the Silver Ghost, 20 HP, and New Phantom chassis. | ||
| View original record | To Hs. from DA. 18840 DA4/M19.3.26. PHANTOM SUSPENSION. X. 8410 X. 5410 X. 3840 We have had a long note from R. about this, of which you will get your copy in due course. He appears to have gone… | ||
| scan0135 | Schemes and suggestions for weight reduction on the Lighter Phantom engine and chassis. | ||
| View original record | To CJ. from E. c. to BY. Hs. x8840 E1/M31.3.26. RE: LIGHTER PHANTOM ENGINE. X.8840 X.8060 X.8050 Referring to your memo. CJ11/E26.3.26 we have a scheme nearly completed for the cylinders and valve… | ||
| scan0136 | Design considerations for a lighter Phantom engine, including blueprints, compression ratios and spark plug positioning. | ||
| View original record | To R. from E. c. to CJ. Hs. c. to BY. X8840 RE. LIGHTER PHANTOM ENGINE. X.8840 X.8770 Please find herewith blue prints of LeC.2229 and 2230., shewing the above. The former shews the general… | ||
| scan0137 | List of nine suggestions for lightening the Phantom engine. | ||
| View original record | To R. from E. c. to CJ. BY. c. to HS. X8840 E2/M1.4.26. RE. LIGHTER PHANTOM ENGINE. X. 8840 X. 8770 There are a number of further suggestions for lightening the Phantom engine, not previously… | ||
| scan0138 | Outlining priorities for the Phantom weight reduction project. | ||
| View original record | 48420 To C.J. FROM R. (Le Candel) C. to DA. E. BY. HS. R3/M2.4.26. Delivered to WW. during the Easter holidays. PHANTOM WEIGHT REDUCTION. - X.8770. 48420 Naturally I shall be pleased if BY. will help… | ||
| scan0139 | Comparison of the weights between a Cast Dashboard and a Standard Dashboard. | ||
| View original record | X8840 To Hs from RHC. C. Das RHC9/BE. 8.4.26. We give below comparitive weights of Cast Dash-board and Standard Dashboard. Cast Dashboard - 24.75 lbs. Standard Dashboard - 19.25 lbs Diff: - 5.50 lbs.… | ||
| scan0140 | Potential development and benefits of a lighter aluminium Phantom engine with increased horsepower. | ||
| View original record | To E. Hs. ) FROM R. BY. AJS. ) LE CANADEL. c. to BJ. Wor. c. to RG. DA. 48840 RL/M11.4.26. PHANTOM - ALUMINIUM ENGINE, LIGHTER, X.8070 X.8300 INCREASED HP. ETC. X.8430 X.8840 This seems quite ready to… | ||
| scan0141 | Feasibility of shortening the connecting rods for the Lighter Phantom engine. | ||
| View original record | To Hs. from E. c. to BJ. R. BY. X8840 E3/M15.4.26. RE. LIGHTER PHANTOM ENGINE. X.8030 X.8840 X.8000 Regarding our last conversation respecting the possibility of shortening the Phantom con. rods you… | ||
| scan0142 | Internal memorandum discussing modifications to the Lighter Phantom Engine, including longer rods, valve tappets, and a lighter clutch and flywheel. | ||
| View original record | (8840) BY/SS. c. Hs. E. C. BY/TWD. BY3/H. 16.4.26. LIGHTER PHANTOM ENGINE. I attach hereto, for your information, copy of Rl/M. 11.4.26. You will note from same that R. prefers LeC.2229. I understand… | ||
| scan0143 | Summary of chassis suspension design, covering the roles and interaction of tyres, road springs, and hydraulic dampers. | ||
| View original record | To HS. DA. } from R. CY. BY. } Le Canadel. RL/M25.4.26. X8840 C. BJ. Wor. RG. E. NA. CWB. PN. EP. Mr. Fuller CHASSIS SUSPENSION. X.8410. X235 X8840 This is not intended to contain anything very novel,… | ||
| scan0144 | Suspension design, specifically spring length, stiffness, and damping for new car models. | ||
| View original record | -2- Contd. these are now demanding to be longer, so that we are trying the new models EAC. 1 & 7 with 48" and 45" springs, and even should we find some distinct modification of the front axle system I… | ||
| scan0145 | Technical report discussing improvements to front axle control, spring stiffness, and weight distribution for enhanced ride comfort. | ||
| View original record | -3- Contd. We shall be working to find a design of something more perfect for the front axle control, and have hopes of doing some good in this direction, but at the moment we must make the best of… | ||
| scan0146 | Report page discussing road spring control, horizontal rigidity, and the importance of suspension. | ||
| View original record | -4- Contd. There are several other items not mentioned in the foregoing which are rather lengthy to discuss, such as the distance from the road to the road spring control causing lateral movements of… | ||
| scan0147 | Further lightening of the Phantom flywheel and clutch by comparing its weight and inertia to the Silver Ghost's. | ||
| View original record | To Hs. from E. c.c. to BJ. R. BY. 78840 E1/M26.4.26. X.8300 X.9300 X.8840 FURTHER LIGHTENING OF PHANTOM FLYWHEEL & CLUTCH. Regarding the further lightening of the Phantom flywheel and clutch we have… | ||
| scan0148 | Experiments on Phantom suspension, dampers, and weight distribution. | ||
| View original record | To Hs. ) DA. } FROM R. BY. ) +8840 RL/M27.4.26. c. to BJ. E. OY. NA. PHANTOM SUSPENSION. DAMPERS AND DISTRIBUTION OF WEIGHT. X.8410 X.235 X.8840 I notice two points that may be escaping notice :- (1)… | ||
| scan0149 | The inspection process for castings and forgings to control for excess weight. | ||
| View original record | To Hs. BY. RG. FROM R. c. to BJ. Wor. X. 8840 R6/M4.5.26. EXCESS WEIGHT. As regards castings and forgings etc. we think it is absolutely necessary for every casting to be cut up and inspected, to see… | ||
| scan0150 | Development of a lighter Phantom engine with a new anti-detonating aluminium cylinder block and head. | ||
| View original record | To Hs. } BY. } FROM R. c. to BJ. Wor. X8840 R5/M4. 5. 26. LIGHTER PHANTOM ENGINE. X. 8840 X. 8030 X. 8770 X. 8050 Allow no expense to be put on this engine that is not suitable for the anti-detonating… | ||
| scan0151 | Enclosed report on subframe body weights for 40/50 and 20 HP models, requesting standardized weighing procedures. | ||
| View original record | To Hs. from EV. X8840 EV1/12.5.261 SUBFRAME - BODIES. 40/50 AND 20 HP. X.8830 X.5830 X.8840 We have drawn up the enclosed report on the subject of subframe bodies as suggested by yourself. The body… | ||
| scan0152 | Cover memo for a telegram regarding the lightened New Phantom and Condor Camshaft gland modification. | ||
| View original record | Hs. c. to Rg. X 8840 BY/012/G.19.5.26. We attach hereto copy of telegram received from R. in connection with lightened type New Phantom and the modification to Condor Camshaft gland. BY/C. | ||
| scan0153 | Copy of a wire with instructions for adapting an aluminium block and head. | ||
| View original record | A/p COPY OF WIRE DATED 19TH. MAY 1926. CHICHESTER. BAILEY AND HIVES, ROYCAR - DERBY. PUT IN HAND ALUMINIUM BLOCK AND HEAD TO SCHEMES 753 AND 754 IF WE MUST RETAIN LONG RODS WE REQUIRE 1/4 INCH ON… | ||
| scan0154 | Delays and proposed design modifications for the lightened Phantom engine. | ||
| View original record | To EY. from E. c. to BJ. Hs. X8840 E1/M9.6.26. RE. LIGHTENED PHANTOM ENGINE. X. 8840 X. 8870 X. 8230 In reply to your BY3/H3.6.26., we regret that the remaining schemes for the lightened Phantom… | ||
| scan0155 | Report comparing the inertia and weight of Phantom and Silver Ghost flywheel and clutch units. | ||
| View original record | Excl. Report. To R. From Hs/ACL. c. RJ. Wor. RG. c. E. Da. Ey. c. Hs/ACL. X8840 Hs/ACL1/T10.6.26. X9300 (crossed out) X8300 (crossed out) X9930 INERTIA AND WEIGHT OF PHANTOM & SILVER GHOST FLYWHEEL &… | ||
| scan0156 | Design proposals for a lighter Phantom engine valve rocker cover. | ||
| View original record | To BY. from E. c. to BJ. Hs. X8840 E1/M6.7.26. LIGHTER PHANTOM ENGINE. X.8090 X.8060 VALVE ROCKER COVER - SCHEME 763. X.8840 X.8050 The scheme for the lighter cover that we have had up till now does… | ||
| scan0157 | Weight comparison between a standard C.I. induction system and a new Aluminium induction system. | ||
| View original record | To Bx/S.S. X8840 30/8/26. ALUM CARB. & INDUCTION PIPE. WEIGHT REDUCTION. The following figures give the weights of the Std. C.I. Induction System and Carb. also the new Alum Indn. System with C.I.… | ||
| scan0158 | The production of a lighter Phantom engine with aluminium cylinders and an improved induction pipe. | ||
| View original record | +8840 To Hs. from R. c. to BJ. Wor. BY. R5/M31.8.26. RE. LIGHTER PHANTOM. X.8770 X.8840 X.8051 X.8070 We have been anxiously awaiting for many months the production of the Phantom engine with… | ||
| scan0159 | Comparison of weights for different Phantom front axles. | ||
| View original record | X68270 To Hs from RHC. C-GWH. RHC4/BE. 22.9.26. RE PHANTOM FRONT AXLES We give below comparative weights of the above Front Axles:- Standard Front Axle to Arrgt.Drg. G.72403(less Road Wheels & Tyres)… | ||
| scan0160 | Comparative weights list for different Phantom Flywheel & Clutch assemblies. | ||
| View original record | X8840 To Hs from RHC. RHC7/BE. 22.9.26. We give below comparative weights of the Phantom Flywheel & Clutches. Old Standard Flywheel & Clutch to Arrgt. Drg. G.73474. 144.75 lbs. Lightened Flywheel &… | ||
| scan0161 | Experiments to determine the torsional deflection and rigidity of a Phantom crankshaft. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to RG. E. c. to DA. BY. c. to OY. X8840 Hs/ACL1/LG25.9.26. PHANTOM - CRANKSHAFT VIBRATIONS. X684 / X8010 In connection with the Phantom crankshaft vibration… | ||
| scan0162 | Report page detailing the weight and polar moment of inertia for engine components, and calculations for the nodal point. | ||
| View original record | contd :- -2- | PART. | WEIGHT. lbs. | POLAR MOMENT OF INERTIA. (W/g K^2) | |---|---|---| | Crankshaft complete - | 75.875 | .06738 units. | | Big end of conn.rod (2.64 lbs. each - total for six) - |… | ||
| scan0163 | Analysis of crankshaft critical speed and vibration for the Phantom engine, comparing it to the 20 HP model. | ||
| View original record | contd :- -3- Working this out on the lines given in our first report we find that the free period would be 158 oscillations per second or 9480 oscillations per minute. We know from the 20 HP. results… | ||
| scan0164 | Graph showing the torsional deflection of a Standard Phantom crankshaft supported in the crankcase bearings. | ||
| View original record | TORSIONAL DEFLECTION OF STD. PHANTOM CRANKSHAFT. CRANKSHAFT SUPPORTED IN THE BEARINGS IN CRANKCASE. ANGLE OF TWIST IN RADIANS TORQUE . lbs.ft. DOWN LOADS. UP LOADS. .030 1½° .025 1° .020 .015 .010 ½°… | ||
| scan0165 | Comparative weights of standard and lightened components for a Phantom engine. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to RG. E. c. to DA. BY. X8840 Hs3/LG27.9.26. LIGHTENED PHANTOM ENGINE. X8770 We give below comparative weights of the lightened pieces in connection with the lightened… | ||
| scan0166 | Valve timing and induction for the Aluminium Phantom engine. | ||
| View original record | To Hs. from R. X8840 RL/MS.19.10.26. RE. ALUMINIUM PHANTOM ENGINE. X 8770 X 8840 X8070 X 8650 X 8230 X 8060 Regarding the power of the Phantom engine we want to hold open the inlet valves longer than… | ||
| scan0167 | Use of a cast light magnesium alloy for the valve rocker cover on the lighter Phantom engine. | ||
| View original record | X8840 To BY. from E. c. to BJ. Hs. E1/M13.10.26. RE. LIGHTER PHANTOM ENGINE. X. 8080 X. 8840 Referring to the valve rocker cover of the lighter Phantom engine, we should prefer to retain this as a… | ||
| scan0168 | Tests on cylinder and liner temperatures for the Lighter Phantom engine. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to RG. E. c. to DA. BY. X 8840 Hs/ACL1/LG18.10.26. LIGHTER PHANTOM ENGINE. V8050 CYLINDER AND LINER TEMPERATURE. X3866 X8840 In view of piston ring carbonising… | ||
| scan0169 | Placement and testing of couples within a cylinder bore, including diagrams. | ||
| View original record | contd :- -2- Six couples were used altogether on the pressure side of the cylinder bore and a sketch shews the position of these couples. It will be seen that the top position is just below the level… | ||
| scan0170 | Analysis of engine cylinder and liner temperatures under various speeds and compression ratios, including pre-ignition tests. | ||
| View original record | contd :- -3- The appended curves are the results and shew the temperature of the top of the liner and cylinder wall for the different speeds also the B.M.E.P. developed at the time. From these curves… | ||
| scan0171 | Engine tests investigating pre-ignition, temperature changes, and the effects of varying oil pressure. | ||
| View original record | contd :- -4- drop in power. The pre-ignition was not as severe as we have experienced and gave no popping back in the carburetter. With pre-ignition the top of the liner temperature rapidly increased… | ||
| scan0172 | Summary of test results on engine cylinder liners, discussing temperature, pre-ignition, and oil flow. | ||
| View original record | contd :- -5- The chief thing this latter test proves is that the cyl. skirts are cooled to a certain extent by the oil spray as would be imagined. SUMMARY. (1) Up to the present after 39 hrs. running… | ||
| scan0173 | Graphs and a diagram showing liner temperatures for the Lighter Phantom Engine under various conditions. | ||
| View original record | LIGHTER PHANTOM ENGINE. LINER TEMPERATURES TEMPERATURES AT 1.5" FROM TOP OF CYL. FULL LOAD TEMP. °C LINER TEMP. ALUM CYL TEMP. B.M.E.P. WATER TEMP B.M.E.P. lbs/□" OIL ADMITTED TO BEARINGS AT 60°C.… | ||
| scan0174 | Comparing the weight and capacity of a new radiator type with the current standard. | ||
| View original record | To Mr Hives +884 Nov/Dec. 1926 Herewith standardization sheet for new type Radiator, and particulars of present standard and new type. Radiators complete with controls suspension brackets & shutters..… | ||
| scan0175 | Vehicle weight reduction for the 40/50 and 20 HP models to improve performance and adhere to legal limits. | ||
| View original record | To BJ. C. To SG. hs. from R. c. to Wcr. E. PN. c. to CWB. DA/EV. RE. WEIGHT OF CARS - 40/50 & 20 HP. X.8830 X.8840 X.4538 X.5830 It will be realised that to keep the 40/50 within the law for weight of… | ||
| scan0176 | Continued discussion on fabric-covered car bodies, weighing their appearance against cost. | ||
| View original record | contd :- -2- less weight. Here one sees fabric covered bodies almost entirely. Some look extremely well, as I am not altogether permanently wedded to a highly polished shiny finish, & and I daresay… | ||
| scan0177 | Preliminary lightening of the Phantom engine's waterpipe, flywheel, and clutch, and improvements to the induction system. | ||
| View original record | +8840 To E. H., BY AJS. from R. c. to B.J. Wor. ROLLS-ROYCE LIMITED DERBY R4/M10.2.27. X.8770 X.8840 X.8300 X.8070 X.8180 X.3867 PHANTOM ENGINE - PRELIMINARY LIGHTENING WATERPIPE AND FLYWHEEL ETC.… | ||
| scan0178 | Internal memorandum discussing the supervision of coachbuilding, body design, and lightweight construction experiments. | ||
| View original record | HS X88240 To R. From BJ. Copy to LHS. C. Sg. Hs. Wor. F. PN. CHB. Da/SV. re. Weight of Cars. 40/50 & 20 H.P. With reference to R5/M1/2/27, (despatched from WW 4/2/27), your memorandum was considered… | ||
| scan0179 | Vehicle weight reduction, chassis weight increases, and comparisons of coachwork and dippers. | ||
| View original record | To E. from BJ. 'type of car in the direction of cutting down weight, and have recently 'delivered us a car which weighs approximately 3 cwts. less than their 'competitors. 'With regard to the flexible… | ||
| scan0180 | List of weight changes for the 40/50HP chassis from 1923 to 1927, detailing the reasons for the modifications. | ||
| View original record | 40/50HP Chassis. Date. Weight. Reason. MX/MCM4/T/7.2.27 X4538 Handwritten above 'Weight': 49840 Jan.1923. 3795 lbs. Jan 1924. 3820 lbs. Hartford Shock Absorbers. Torque Reaction dampers Higher… | ||
| scan0181 | Improving riding qualities through optimal weight distribution. | ||
| View original record | To Hs. from R. c. to BJ. Wor. c. to BY. LHS. c. to C. OY. X8840 R3/M24. 6. 27. RIDING QUALITIES - X. 8410 X. 8400 DISTRIBUTION OF WEIGHT. X. 8340 X. 8600 X. 8300 We have spent considerable time… | ||
| scan0182 | On the latest design for Phantom wing stays and head-light fixings, noting weight savings and standardisation. | ||
| View original record | To Hs. from R. c. to BJ. BY. f8840 R6/M9.7.27. PHANTOM WING STAYS - X.8390 HEAD - LIGHT FIXINGS. X.8840 As our latest design of these parts save a considerable percentage of the weight, they assist… | ||
| scan0183 | Outlining proposals for improving the riding qualities of 40/50 and 20 HP cars. | ||
| View original record | To Hs. from R. c. to BJ. LliS. c. to FN. Wor. c. to BY. CWB. 48840 R1/M9.7.27. RIDING QUALITIES. X.8410 X.235 X.5410 X.8420 X.4565 X.8840 For improved riding qualities of our cars - both 40/50 and 20… | ||
| scan0184 | Design of a lightweight sports car body, referencing model 10-EX. | ||
| View original record | BJF from DA/EV. c. to Hs. +2840 DA/EV1/13.9.27. RE.10-EX. X. 8774 X. 8840 X. 8830 X. 8600 With reference to BJ17/E12.9.27., we note that the Sales officials have little doubt that a sports body… | ||
| scan0185 | Progress report on the body and engine development for a sports car. | ||
| View original record | To B.J. from R. c. to Wor. Hs. c. to BY. EP. c. to Sg± 18840 R2/M20.9.27. SPORTS CAR. X. 8840 X. 8774 X. 8830 My dear BJ. BODY. The drawing and constructions scheme is proceeding well for the body. It… | ||
| scan0186 | Technical memorandum detailing proposed chassis and engine improvements, including weight reduction and suspension modifications. | ||
| View original record | contd :- --2-- shall put up the torsional vibration period, which we are too near, and I believe is the cause of the roughness. We shall strengthen the crankchamber against the forces which we are… | ||
| scan0187 | Continued typed memorandum discussing getting help from Mr. Wormald to shorten a delay. | ||
| View original record | contd :- -3- by our experience and knowledge. We must get Mr. Wormald to help us to shorten the delay I he can do it. R. | ||
| scan0188 | Reminder request for a detailed breakdown of comparative weights for the EAC.7 and 40/50 back axles and related components. | ||
| View original record | Hs. from DA. 488240 DAB/M8.10.27. REAR AXLE WEIGHTS. X. 7350 X. 8840 This is to remind you of our verbal request that you would supply us with comparative weights of the EAC. 7. and 40/50 back axles.… | ||
| scan0189 | Request to provide the comparative weights of various axle components for different models. | ||
| View original record | To RHC. from Hs/Rm. X5840 Hs/Rm2/LG25.10.27. COMPARATIVE WEIGHTS - 40/50 AND 20 HP. AXLES. X4538 Will you please let us have the comparative weights of the two types of axle :- WT. OF PARTS REQUIRED.… | ||
| scan0190 | Axle weights, comparing an open propeller shaft with semi-elliptic springs to a cantilever construction. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to E. DA. c. to EY. OY. HS X8840 Hs/Rm2/LG2.11.27. EAC.7. AXLE WEIGHTS. X8350 As will be seen from the attached figures, the open propeller shaft with semi elliptic… | ||
| scan0191 | Comparison of axle weights between the EAC.7 and 40/50 HP models, detailing alterations due to the Hotchkiss drive. | ||
| View original record | COMPARISON EAC. 7. AND 40/50 HP. AXLE WEIGHTS. Weight alterations due to Hotchkiss drive. EAC.7. LBS. | 40/50 HP. LBS. 2 universal joints. 48.0 | Sphere and housing. 21.9 Central axle housing. 39.0 |… | ||
| scan0192 | Table showing weight savings by comparing axle components between models EAC. 7 and 40/50. | ||
| View original record | WEIGHT SAVING INDEPENDENT OF TYPE OF AXLE CONTROL. ITEM. EAC. 7. 40/50. WT. SAVING. Camshafts and camshaft mounting with brake carrier plates and brake shoes. (EAC. 7. spring pads omitted.++) 59++… | ||
| scan0193 | Comparison table of axle component weights for the EAC.7 and 40/50 models. | ||
| View original record | EAC.7. AND 40/50 AXLE WEIGHTS. Parts included in weights given. | ITEM. | (a) EAC.7. | (b) 40/50. | |---|---|---| | Axle tubes stripped. | 54.1 | 59.88 | | Brake drums. | 52.0 | 61.0 | | Brake shoes… | ||
| scan0194 | Axle weights and the inclusion of various components in the calculations. | ||
| View original record | Hs. from DA. (X8840) DAA/M4.11.27. EAC.7. AXLE WEIGHTS. X.8840 X.7350 With reference to Hs/RnB/LG2.11.27., we expect that we shall discuss the whole of this question with R. in the course of the next… | ||
| scan0195 | Weight additions for the 40/50 axle control and recalculating weight savings for the EAC.7 transmission. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to E. Da. c. to BY. X8840 Hs/Rm2/LG3.11.27. EAC.7. AXLE WEIGHTS. X.8840 X.7350 Further to our Hs/Rm2/LG2.11.27. The weight of the universal joint was inadvertently… | ||
| scan0196 | Rear axle control weight reduction and the performance of thin leaf cantilever springs on the 40/50 model. | ||
| View original record | contd :- -2- rear axle control will be 30.5 lbs. lighter than the present standard 40/50. We consider that the spring makers are not making the best use of the metal at their disposal as demonstrated… | ||
| scan0197 | Spring stiffness and axle bump position adjustments. | ||
| View original record | Hs/Rm. from DA. c. to DA. X8840 DAL/Mll.11.27. EAC.14 SPRINGING. X. 8410 X. 8830 X. 8840 With reference to Hs/Rm2/LG5.11.27., we do not think we can allow the axle to penetrate further into the frame… | ||
| scan0198 | The weight and performance of car road springs, comparing American designs with their own. | ||
| View original record | To BY. from Hs/Rm. c. to DA. c. to Wor. 48840 Hs/Rm2/LG14.11.27. ROAD SPRINGS. We are very concerned about the weights of our car road springs. The first test which brought the matter to our notice… | ||
| scan0199 | Continued discussion on leaf spring design, weight, material composition, and stiffness for the 40/50 model. | ||
| View original record | contd :- -2- thick leaf cantilever was eliminated on the rear of the 40/50. Therefore the spring makers have gratuitously added 17½ lbs. to the car weight with no justification because it is certain… | ||
| scan0200 | The weight increase of a stiffer spring compared to a standard spring, and the goal of weight reduction. | ||
| View original record | contd :- -3- Increase in weight of stiffer spring over standard spring 10.5% whereas we consider we ought to be able to decrease the weight quite 20%. As we are fighting for a few pounds off the axle… | ||
| scan0201 | Weight comparison memo for new Sports versus Standard Phantom engine components. | ||
| View original record | To Hs. from RHC. X8840 RHC16/BE. 21.11.27. We give below revised weights of new Sports Pieces as compared with Standard Phantom. | | COMPLETE WEIGHTS(LBS) | | | | |---|---|---|---|---| | | STD:… | ||
| scan0202 | Comparing the weights of a standard exhaust system and a new single downtake exhaust system, noting a weight saving. | ||
| View original record | To Hs. from RHC. X8840 RHCll/BE. 18.11.27. We attach comparative weights of the standard exhaust system to L.O.P. E.75944, and the new single downtake exhaust system to L.O.P. E.76449. It will be… | ||
| scan0203 | Comparative weight analysis between an old and a new type 40/50 exhaust system. | ||
| View original record | EXHAUST SYSTEM 40/50 COMPARATIVE WEIGHTS OLD TYPE TO E.75944 NEW TYPE TO E.76449 | PIECE NO: | DESCRIPTION | NO: OFF | BULK WEIGHT (LBS) | PIECE NO: | DESCRIP: | NO: OFF | BULK WEIGHT (LBS) |… | ||
| scan0204 | Comparative weight analysis document for old and new type 40/50 exhaust systems. | ||
| View original record | -2- EXHAUST SYSTEM 40/50 COMPARATIVE WEIGHTS OLD TYPE TO E.75944 Weight Brought Forward - 35.131 | Part No. | Description | Qty | Weight (lbs) | |---|---|---|---| | E.73225 | Strap | 1 | 1.617 | |… | ||
| scan0205 | Summary of brake distribution calculations for V. series, reduced front, and sports car configurations. | ||
| View original record | LS540 Hs/Rm/LG14.12.27 BRAKE DISTRIBUTION 10-EX. X8470 (A) V. series braking with new type axle. G.74666 2.5" } } 40.5% to front. G.73149 3" } (B) Reduced front braking. G.74666 2.5" } } 33.0% to… | ||
| scan0206 | The anticipated weight of road springs for EAC.14 cars and possibility of reducing it through improved design. | ||
| View original record | To BY. from Hs/Rm. Hs/Rml/LG3.1.28. Will you please let us know what you anticipate the weight of the road springs for EAC.14 cars should be, and whether there is any possibility of further reducing… | ||
| scan0207 | Requesting to weigh various front axle parts for experimental information. | ||
| View original record | To Hm. from Hs/Rm. c. to Sft. c. to Mr. Scott. [Handwritten:] +840 [Handwritten:] x 840 Hs/Rm2/LG4.1.28. We should be obliged if you would allow W.Bell to weigh various front axle parts in your… | ||
| scan0208 | Breakdown of approximate weights for the 40/50 Phantom Chassis, its components, spares, and accessories. | ||
| View original record | 78840 N.R.C.Rm 40/50 ROLLS-ROYCE PHANTOM CHASSIS APPROXIMATE WEIGHTS. cwts.qrs.lbs. Total Lbs. Chassis, long type, average weight 35. 1. 22. 3970 The above figures include:-… | ||
| scan0209 | Breakdown of the weight of a Continental Phantom bare chassis. | ||
| View original record | x8840 WEIGHT OF CONTINENTAL PHANTOM. x8774 Weight with spare wheel, 20 gall. petrol, water, oil - bare chassis :- cwts. qrs. lbs. Front - 18 0 14 Rear - 17 2 14 1 ton. 15 3 0 1 ton. 15 1 14 TOTAL.… | ||
| scan0210 | Weight specifications for the latest type Dunlop W.B. wire wheel. | ||
| View original record | [Handwritten]: F8840 [Handwritten]: X3725 19th. Mar. 1928. Weight of latest type Dunlop W.B. wire wheel 21" rim fitted with 33 X 6.75" Dunlop cover and " " " tube. Balanced - complete 73 lbs. Standard… | ||
| scan0211 | Comparison of specifications for Standard and New Type Dunlop 21' rim wire wheels. | ||
| View original record | y8840 STANDARD DUNLOP WIRE WHEEL 21" RIM. y3725 Weight 34½ lbs. Length of hub shell 8.70" NEW TYPE DUNLOP WIRE WHEEL 21" RIM. Weight 32 lbs. Length of hub shell 7.80" Rm. | ||
| scan0212 | The weights of various 40/50 HP chassis models and additional components to calculate the complete chassis weight. | ||
| View original record | BJ. C. R. C. BY. c. EWT/HS. [STAMP] Hm APR 16 1928 RECEIVED COPY FOR MR. CHANDLER. SEND TO N.R.C X8840 EP5/H13.4.28. X4117 re. WEIGHING OF NEW PARTS. With reference to 40/50 HP. Chassis, we give below… | ||
| scan0213 | The road test of the 'SS' Chassis, detailing its performance compared to the present Phantom model. | ||
| View original record | +88240 (handwritten) To R. From Hs. c. to BJ. Wor. c. to E. DA. c. to BY. Hs3/LG23.11.28. 'SS' CHASSIS. (Handwritten numbers: x200 and x7770 are crossed out, x7840 is written) We have run this chassis… | ||
| scan0214 | Weight comparison sheet for the Standard 40/50 'V' series and the 'SS' chassis. | ||
| View original record | CHASSIS WEIGHTS. Standard 40/50 'V' series. Weight of chassis - long type - including :- LBS. Battery. 100 Battery box. 16 Oil. 25 Water. 80 Petrol 18 galls. 135 Tyres - 4 528 Wt. of chassis with… | ||
| scan0215 | Weight specifications and breakdown for the 18-EX chassis. | ||
| View original record | Hs. from GWH. X7840 GWH/LG23.11.28. WEIGHT OF 18-EX CHASSIS. X7840 Comprising the following :- Chassis with 4 Dunlop 20 X 5 wheels with 32 X 6 tyres. 2 spare wheels at rear 20 X 5, tyres 32 X 6, 4… | ||
| scan0216 | Table detailing the weights of various chassis series, spares, and their totals in pounds (lbs). | ||
| View original record | X 8840 Hs. Mx/McMl/T24.11.28 re CHASSIS WEIGHTS Series. Chassis. Spares. Total. F2A. 3995 210 4205. F2B 3990 210 4200 G2A 4000 210 4210 Chassis not including oil, petrol, water, tyres, and is an… | ||
| scan0217 | Tests and factors affecting Phantom I suspension complaints. | ||
| View original record | X8840 To R. from Hs/Rm. c. Sg. Wor. c. Da. E. c. Ey. Hm. Hs/RM1/MJL.12.29. X8770 X8005 X8840 x 235 x 8410 PHANTOM I SUSPENSION. In conjunction with the Repair Dept. we are carrying out tests… | ||
| scan0218 | Vehicle suspension issues, including pitching, springs, and shock absorbers. | ||
| View original record | -2- pitching at the higher speeds is introduced. The light fabric body however, is most difficult to deal with as it has a tendency to pitch over the whole running range. Such cars also ride harshly… | ||
| scan0219 | Experiments to improve ride quality through modifications to springs and valves on Phantom I and light fabric bodied cars. | ||
| View original record | -3- appears to be absolutely essential to get the full benfit from these weak springs. For light fabric bodied cars which we have so far failed to improve to any great extent, we are experimentally… | ||