Rolls-Royce Archives
| Identifier | Entry | ||
| Scan0 | Query regarding the design standard and material suitability for a 20.HP rear axle. | ||
| View original record | TO HS. FROM R. ORIGINAL R1/M1.12.23. 20.HP. REAR AXLE. X 4256 Referring to HS4/LG261123, please ask if this design is the old standard, or altered to the suggestions from here - i.e. length, etc. Is… | ||
| Scan1 | From 'R.' detailing car preferences for a trip to Le Canadel, including models for experimental testing. | ||
| View original record | TO HS. FROM R. ORIGINAL R2/M1.12.23. c.c. to CJ. BJ. re. LE CANADEL [Handwritten, crossed out] X4219 [Handwritten, crossed out] 79940 For the first part of the time at Le Canadel I should prefer the… | ||
| Scan2 | Requesting more specific details about the Hispano-Suiza brakes, particularly the cam and servo mechanism. | ||
| View original record | TO HS. FROM DA. re. HISPANO-SUIZA. ORIGINAL DA1/M1.12.23. 4214 With reference to the particulars of the Hispano-Suiza brakes you have recently sent us we wonder if you could add exact particulars of… | ||
| Scan3 | Delaying four-wheel brake designs pending the results of experiments on the epicyclic pressure distributing gear. | ||
| View original record | ORIGINAL TO HS. FROM DA. DA2/M11.12.23. Y1559 X9940 FOUR WHEEL BRAKES. Several designs are standing still for information as to the best leverages. For instance the epicyclic pressure distributing… | ||
| Scan4 | New type of sleeve spring clip with dowel pegs for 40/50 four-wheel brakes. | ||
| View original record | TO BY. FROM DA. c. to CJ. c. to Ry. c. to HS. ORIGINAL 40/50 - FOUR WHEEL BRAKES. L9940 We send herewith N.scheme 1710. shewing the type of sleeve spring clip with dowel pegs fitting into holes in the… | ||
| Scan5 | New scheme for a front dumb iron, intended to act as a stop on the front shackle in case of spring failure. | ||
| View original record | ORIGINAL TO BY FROM DA. (crossed out) DA3/M4.12.23. c. to CI c. to RC c. to HS. 40/50 - FOUR WHEEL BRAKES. X9940 (handwritten) FRONT DUMB IRON. We send herewith N.scheme 1708., shewing a suggestion… | ||
| Scan6 | On the design of the front spring rear anchorage for the 40/50 four-wheel brake system. | ||
| View original record | ORIGINAL TO EY. FROM DA. DA2/M4. 12. 23. c. to Od. (crossed out) c. to RG. (crossed out) c. to HS. 40/50 - FOUR WHEEL BRAKES. X99440 FRONT SPRING REAR ANCHORAGE. We send herewith N.scheme 1706.… | ||
| Scan7 | Modifications for the 40/50 four-wheel brake system. | ||
| View original record | TO BY. FROM DA. c. to GI c. to RG c. to HS. 40/50 - FOUR WHEEL BRAKES. X9940 We send herewith N.Scheme 1707. shewing the general arrangement of the front of the car with the method of axle control… | ||
| Scan8 | Modifications and completion schedule for a 20.HP. All-Weather car destined for France. | ||
| View original record | R.R. 235a-(100 T) (S.H. 159 11-8-20) G. 2800 ORIGINAL TO HS. FROM DA/EV. DA/EV1/M6.12.23. re. 5.G.11. - 20.HP. ALL-WEATHER CAR. X3730 Y4219 We enclose herewith a copy of a letter sent to Messrs Young… | ||
| Scan9 | Letter to James Young & Co. Ltd. requesting modifications to a 20 HP All-Weather car body for Mr. Royce. | ||
| View original record | Copy to Messrs G.Beaton & Son Ltd. Copy to Mr.Hives. Derby. "CAMACHA". WEST WITTERING. CHICHESTER. 6th. DEC. 1923. Messrs James Young & Co. Ltd. Carriage Motor Works, 37 London Road, BROMLEY. KENT.… | ||
| Scan10 | Sketch and notes for an instrument board steady mechanism. | ||
| View original record | SKETCH OF INSTRUMENT BOARD STEADY SCUTTLE ARMATURE Flexible Steel Straps. Top of straps is attached to the Scuttle armature - the bottom side fixed at the instrument board EW | ||
| Scan11 | The design, construction, and fitting of a 20.HP. body underframe suspension. | ||
| View original record | TO BY. FROM DA/EV. DA/EV1/M8.12.23. c. to GJ. c. to HS. c. to LMS. c. to Gv X4613 Y3730 X4260 X4270 re. 20.HP. BODY UNDERFRAME SUSPENSION. We send herewith N.scheme 1491. shewing the construction and… | ||
| Scan12 | Experiment with split shoes and a floating fulcrum for 40/50 front wheel brake shoes. | ||
| View original record | TO BY. FROM DA. ORIGINAL DA4/M7. 12. 23. c. to C.J. c. to RG. c. to HS. 40/50 FRONT WHEEL BRAKE SHOES. X9940 We send herewith N. scheme 1713. shewing a further experiment with split shoes. In this… | ||
| Scan13 | Modified design for the four-wheel brakes pressure distributing gear. | ||
| View original record | TO BY. FROM DA. ORIGINAL DA2/M7. 12. 23. c.c. to CJ. c.c. to RG. c. to HS. X1859 X9940 40/50.-- FOUR WHEEL BRAKES. PRESSURE DISTRIBUTING GEAR. We send herewith N. sch.1705. shewing the modified design… | ||
| Scan14 | Development of a sequence silent starter system for a large chassis engine. | ||
| View original record | TO BY. EFC. HS. FROM R. X.4168 C. to CJ. BJ X.9620 C. to RV. PN X.9650 SEQUENCE SILENT STARTER. We have had in hand for some time quite a promising scheme of starter for our large chassis engine. This… | ||
| Scan15 | Telegram requesting a man be sent immediately to wire an instrument board for the Goshawk project. | ||
| View original record | RR 144A (50BKS.) (SK 671 23-5-23) MP 272631 ROLLS-ROYCE LTD. TELEGRAM RECEIVED BY TELEPHONE. Time Received: 10.50 Date: 11-12-23 To: Rayleigh By: W&A from: Sutton 10-0 [Stamp: F.D 11 1923 RAYLEIGH… | ||
| Scan16 | Design and modifications for servo-assisted front and rear brake systems for different chassis models. | ||
| View original record | TO DA. FROM H. c. to ED. MR.RS. [Handwritten note]: work by ORIGINAL SECRET. RE BRAKES. E. A. C. 111. These are to go ahead as originally arranged with only the certain modifications necessary to make… | ||
| Scan17 | Tests on front axle control using stiffer springs and different configurations. | ||
| View original record | (2) The front axle in all cases is to be controlled by the front springs and to be tried with 25% stiffer springs than our standard. The road springs being 45" instead of 42" and anchored at the rear… | ||
| Scan18 | Requesting experiments on four-wheel brakes to test variations due to surface conditions and compare Halo and Ferodo materials. | ||
| View original record | TO HS. FROM R. ORIGINAL R2/M11.12.23. FOUR WHEEL BRAKES. V1555 / X9940 Will you please make definite experiments to find out the variations in braking due to the condition of the surfaces? I still… | ||
| Scan19 | Proposals for increasing the lock on the front axle for four-wheel brakes. | ||
| View original record | TO BY. FROM DA. c. to Ed. c. to Rd. c. to HS. ORIGINAL DA1/M12.12.23. 40/50. FOUR WHEEL BRAKES. FRONT AXLE. X9940 X9420 We send herewith N.scheme 1716. shewing our proposals for gaining increased lock… | ||
| Scan20 | Secret internal memo discussing unexpected multiplication results in a servo system. | ||
| View original record | R.R. 235A (100 T) (S.H. 159 (1-8-20) G. 2800 ORIGINAL. TO HS. FROM DA. SECRET. DAL/M13.12.23. E. A. C.111. X9940 X3409 SERVO. Referring to your HS/AJLL/1G101223., we are surprised at the… | ||
| Scan21 | Query regarding potential friction losses in the four-wheel brake transmission, specifically the 'servo' connecting lever. | ||
| View original record | TO HS. FROM DA. ORIGINAL DA2/M13.12.23. FOUR WHEEL BRAKES. X9940 Referring to your HS5/LG101223, re loss in the brake transmission, would you tell us whether the 'servo' connecting lever on the… | ||
| Scan22 | Rejection of a proposed 'Miles Per Gallon' instrument due to concerns over its complexity and reliability. | ||
| View original record | TO FN. FROM R. ORIGINAL R1/M14. 12. 23. c. to CJ. c. to HS. c. to BY. re. "MILES PER GALLON" INSTRUMENT. X3896 Referring to your PN14/DN121023., I do not consider this scheme would be a success. It is… | ||
| Scan23 | Potential modifications to the 40/50 front wheel brake servo to eliminate snatching and chanking. | ||
| View original record | R.R. 235A (100 T) (S.H. 159 11-8-20) G. 2800 TO HS. FROM DA. ORIGINAL DA3/M15.12.23. 40/50. FRONT WHEEL BRAKES. SERVO. X9940 We think that the pull off spring on the servo operating mechanism is quite… | ||
| Scan24 | Technical memo discussing the arrangement and mechanics of an improved four-wheel brake system. | ||
| View original record | R.R. 2R5A(100 T)(S.H 152, 11-8-20) C. 2500 ORIGINAL TO HS. FROM R. SECRET R5/117. 12. 23. c. to CJ. BJ. RG. DA. c. to WOR.BY. PN. E. A. C. 11. & IMPROVED E.A.C.1. X9940 FOUR WHEEL BRAKES. The final… | ||
| Scan25 | The development and challenges of implementing four-wheel braking systems. | ||
| View original record | R.R. 295A (100 T) (S.H. 159. 11-9-20) G. 2800 (2) so as to use a lapping jointed shoe backwards, and making the rear shoes longer than the forward shoes, gives us by direct pressure from the foot… | ||
| Scan26 | Hand-drawn diagram of a servo-assisted mechanical linkage system with a suspension link. | ||
| View original record | Servo 150 LBS x 5 INS MOVET. SUSPENSION LINK. | ||
| Scan27 | Alterations to a switchbox for the EAC and Goshawk projects. | ||
| View original record | R.R. 835A (100) T(S)H. 159. 11-8-20(?) G. 2300 TO EFC. FROM R. c. to CJ. BG. RG. c. to EH. DA. DI. c. to HS. PN. SECRET. O.E.T.A.I.N.C.A.L. SWITCHBOX. x 9730 (magneto !) x 4087 For EAC.1 & 11. and… | ||
| Scan28 | Outlining four separate experiments proposed for the 40/50 four-wheel brake system. | ||
| View original record | TO BY. FROM DA. ORIGINAL DA1/M20. 12. 23. c. to CJ. RG. HS. 40/50 - FOUR WHEEL BRAKES. X9940 We send herewith N.sch.1720. This shews four separate experiments on the front wheel brakes which we should… | ||
| Scan29 | The testing of a 20 HP rear axle gear set with thicker pinion teeth. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL EXPERIMENTAL REPORT. Expl. No. 4256 REF: HES/LSM.12.12.23. TO 'R' from Hs. c. to CJ. c. to RE. c. to R. c. to Da. c. to BY. 20 HP. REAR AXLE. We… | ||
| Scan30 | Arrangements for testing an experimental car at Le Canadel, including driver logistics. | ||
| View original record | To R. from Hs. c. to CJ. c. to EJ. ORIGINAL HsL/LGS.12.23. LE-CANADEL. tu1219 It would be more useful, as an experimental car, to run 5-G-11 at Le Canadel rather than 4-G-11. It would also be a good… | ||
| Scan31 | The analysis and comparative results of 20 HP footbrake tests. | ||
| View original record | To R. from Hs. c. CJ. E. BY. c. RG. CY. DA. ORIGINAL Hs5/T4.12.23. RE BRAKE TESTS. Attached herewith is a report on the analysis of the 20 H.P. footbrake. The brake was fixed to the back end of a… | ||
| Scan32 | Testing Ferodo brake linings with varying positions on brake shoes. | ||
| View original record | R.R. 403 (40 H) (SL 42 12-7-23). J.H.,D. ORIGINAL 4254 EXPERIMENTAL REPORT. COPIES TO: R.CJ. BJ. WOR. By. E. Da. EP. PN. OY. Expl. No. 3409 3539. REF. Hsl/T4.12.23. OBJECT OF TEST. TESTER. Test of… | ||
| Scan33 | Sketches to illustrate the position of Ferodo on brake shoes. | ||
| View original record | Sketches to illustrate position of Ferodo on shoes. (4) Standard shoe is a combination of Nos. ① & ② SUMMARY OF TEST. ① Toggle 24° .450 .300 Pivot ② Toggle 30° Pivot ③ Toggle 56° 66° Pivot SCALE 1/4 | ||
| Scan34 | Sketches illustrating the position of Ferodo brake lining on brake shoes. | ||
| View original record | Sketches to illustrate position of Ferodo on shoes (4) Standard shoe is a combination of no's ① & ② SUMMARY OF TEST. ① Toggle .450 .300 24° Pivot ② Toggle 30° Pivot ③ Toggle 56° 66° Pivot SCALE 1/4 | ||
| Scan35 | Capacity temperature tests of Gosbank condensers. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 4430. REF: EFC2/14.12.23. To R & E. from EFC. c. CJ. & FN. c. EF. EP. DA. X.4430 - CAPACITY TEMPERATURE TESTS OF GOSBANK… | ||
| Scan36 | Freezing tests of Goshawk paper condensers. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. COPY. Expl. No. 4430 REF: FG.4. Nov. 28th 1923. EXPERIMENTAL REPORT. attached to EF62/T4.12.23. FREEZING TESTS OF GOSHAWK PAPER CONDENSERS. The object of… | ||
| Scan37 | The results of condenser tests under various temperature conditions. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. -2- Expl. No. 4430 REF: P.C.4. Contd. signs of waxing. The ratios of the capacity observed at the end, i.e. 16°C, to that observed at… | ||
| Scan38 | The effect of low temperatures on the capacities of condensers. | ||
| View original record | -3- Contd. With the exception of No.32, there do not appear to be any definite signs of the low temperatures having had a tendency to bring the capacities of the condensers back to their original… | ||
| Scan39 | Brake tests on the 40/50 model, focusing on the bedding of shoes and the wrapping action. | ||
| View original record | ORIGINAL To R. from Hs. c. CJ. E. BY. OY. c. RG. Da. Hs6/T4.12.23. RE BRAKE TESTS. X3764 X3422 X94us Attached herewith are two prints which show the bedding of an ineffective footbrake and a very… | ||
| Scan40 | Examination of foot brake shoes on chassis 4EX, showing clearance measurements in thousandths of an inch. | ||
| View original record | EFFECTIVE. BRAKES EXAMINATION OF FOOT BRAKE SHOES ON 4EX. SPEEDOMETER = 8475 Note. THE FOOT BRAKE ACTUATING LEVER OF EACH DRUM WAS PULLED ON UNTIL THE SHOES JUST TOUCHED THE DRUM. THE CLEARANCE… | ||
| Scan41 | Examination of ineffective foot brake shoes on chassis 4EX, detailing wear patterns and measurements. | ||
| View original record | IN-EFFECTIVE BRAKES Examination of Foot Brake Shoes on 4EX. Speedometer Reading 7038. (Shoes fitted and bedded OK at speedometer reading 2399) The bedding of the shoes on the drums was as shown in the… | ||
| Scan42 | Comparing the wear properties of air-hardened steel versus C.H.N.S. steel for 20 HP rear axle pinions. | ||
| View original record | ORIGINAL To R. from Hs. Hs3/T4.12.23. RE 20 H.P. REAR AXLE. X4256 Reference Rl/M1.12.23. All the axle pinions so far that we have tested have been to the original dimensions as regards length of teeth… | ||
| Scan43 | Print showing a comparison of turning circles for 40/50 and 20 HP models. | ||
| View original record | ORIGINAL. To R. from Hs. Hs3/T5.12.23. RE TURNING CIRCLES. X980 Herewith print showing a comparison of turning circles for 40/50 and 20 H.P., with standard balloon tyres. Hs. | ||
| Scan44 | The Knave carburetter and its requirements for the E.A.C. engine. | ||
| View original record | ORIGINAL To E. from Hs. Hs2/T5.12.23. RE CARBURETTER. L9080 Attached herewith is a print of the Knave carburetter. We have not used the second extra air valve. We consider for the E.A.C. engine it… | ||
| Scan45 | Issues with floating fulcrum brakes and tests to reduce jaggering. | ||
| View original record | R.R. 492A (40 H) (SL 42 12-7-23). J.H.D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs2/T5.12.23. To R. from Hs. c. CJ. RG. c. EY. Da. RE BRAKES. 9940 X4214 On the floating Fulcrum brake, even when we… | ||
| Scan46 | The epicyclic equalizer and pedal pressure tests. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Contd. -2- Expl. No. REF: Hs2/T5.12.23. EPICYCLIC EQUALIZER. We have tried one of these made to the latest instructions. It appears to… | ||
| Scan47 | Technical drawing detailing a Hispano servo shoe, its anchorage, and an adjusting screw. | ||
| View original record | [ "HISPANO SERVO", "SERVO SHOE.", "COVER", "ADJ. SCREW.", "SHOE ANCHORAGE.", "SHOE IN POSITION", "2.200", "4.00D", "3.075", "4.175", "6.15." ], | ||
| Scan48 | Technical drawing of a Hispano Servo mechanism with dimensions and ratios. | ||
| View original record | HISPANO SERVO. RATIO ENG SPEED (DIRECT) TO SERVO SPEED = 29 TO 1. INSIDE DIA. DRUM 7.5" 120° 7.75" FERODO. 2" WIDE. 33° 3.075 33° 27° 7.48 DIA. 'OFF' POSN SECTN ACROSS A.A. 2.100. .275. 1.30. 1.64.… | ||
| Scan49 | Diagrams and data for Hispano-Suiza front wheel brakes, including cam contour and displacement curves. | ||
| View original record | HISPANO FRONT WHEEL BRAKES. DISPLACEMENT CURVE OF SHOE FACE, SERVO NOT IN OPERATION. <-- BRAKE ON JUST TIGHT FRONT & REAR BRAKE SHOES MOVE EQUALLY. MOVEMENT OF FOOT PEDAL TABLE: MOVEMENT OF FOOT PEDAL… | ||
| Scan50 | Diagram and explanation of the Hispano-Suiza brake system. | ||
| View original record | DIAGM. OF HISPANO BRAKE SYSTEM. [Diagram Labels:] TO FRONT BRAKE TO REAR BRAKES F E B. D C. FREE WHEEL SERVO CAM. 4th. PULL FROM FOOT PEDAL A DIRECTION OF ROTATION OF DRUM. 1 SHOE SHOWN ONLY. ACTION.… | ||
| Scan51 | The performance of a 4-wheel braking system on a 40/50 HP model. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 A559 REF: Hs4/107.12.23. To R. from Hs. c. to CJ. c. to Rg. c. to Ds. BRAKES. We have been running a car fitted with the… | ||
| Scan52 | Proposal to reduce the Ferodo lining on the wrapping shoe. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hsd/LGZ.12.23. jaggers with 120° (FROM PIVOT) Ferodo on the wrapping shoe. We propose to further reduce the Ferodo.… | ||
| Scan53 | The advantages of a suggested method for operating 4-wheel brakes. | ||
| View original record | R.R. 493A (40 H) (SL 12-7-23). J.H., D. ORIGINAL Expl. No. 9940 REF: Hs3/LCV.12.23. K9910 EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. c. to De. c. to Rg. 4-WHEEL BRAKES. Herewith description of a… | ||
| Scan54 | Suggested method for operating a four-wheel servo-assisted braking system. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H. D. EXPERIMENTAL REPORT. Expl. No. 9940 1559 REF: Hs3/L07 .12.23. SUGGESTED METHOD OF OPERATING ALL FOUR WHEEL BRAKES BY SERVO ACTION WITH THE TOTAL FOOT PRESSURE… | ||
| Scan55 | Diagram and calculations for a method to operate all four brakes using a servo and direct pressure. | ||
| View original record | SUGGESTED METHOD OPERATING ALL FOUR BRAKES BY SERVO AND DIRECT PRESSURE. For servo assume T2/T1 = 3 (Forward motion) Diagram labels: To rear brakes. Fixed. Servo Equaliser between front & rear brakes.… | ||
| Scan56 | Tests of 'Halo' brake linings, with a segment in the centre of the shoe only. | ||
| View original record | R.R. 403 (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL EXPERIMENTAL REPORT. COPIES TO: RCJ BJ. WGR. By E. Da EP. PN. CY. R2 Expl. No. 4388 REF. Hs/RB2/LGT.12.23. OBJECT OF TEST. Tests on 'Halo' Brake… | ||
| Scan57 | Graph comparing Ferodo and Halo brake linings, showing the effects of temperature. | ||
| View original record | COMPARISON OF FERODO & HALO BRAKE LININGS SHOWING EFFECTS OF TEMPERATURE. Halo --- Ferodo - - - LOAD 20Lbs. R.P.M OF BRAKE DRUM MINS | ||
| Scan58 | Test of Ferodo lined wrapping brake shoes. | ||
| View original record | R.R. 403 (40 H) (SL 42 12-7-23). J.H.D. ORIGINAL EXPERIMENTAL REPORT. COPIES TO: R.CJ. BJ. WOR. By. E. Da. EP. PN. OY. Expl. No. 3409 REF Hs/RB1/8.12.23. OBJECT OF TEST. Test on Ferodo lined wrapping… | ||
| Scan59 | Test comparison table of different brake shoe designs and their performance. | ||
| View original record | Type of shoe. DESCRIPTION. SKETCH. Initial drum r.p.m. Final drum r.p.m. W. REMARKS. 2A. Standard. Standard. 473 550 315 315 15 20 This test made for the sake of comparison with those below as springs… | ||
| Scan60 | The performance and wear of 'Shoe X' brake lining, including diagrams of its rolling action. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. Sheet 3. EXPERIMENTAL REPORT. Exptl. No. 3409 REF: Hs/BB1/LGS.12.23. Shoe X. Ferodo at toggle end only. On applying the brake in this case it was noticed… | ||
| Scan61 | Testing floating fulcrum front brakes with jointed shoes. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. ORIGINAL Expl. No. 9940 REF: Hs1/LGS.12.23. To R. from Hs. c. to CJ. c. to RG. c. to Ds. BRAKES. /9940 We have tested the floating… | ||
| Scan62 | Servo mechanism with a table of applied pressure values. | ||
| View original record | R.R. 492A (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL EXPERIMENTAL REPORT. Expl. No. X9910 REF: Hs/AEL/C1018.23 To R. from Hs/AEL. c.c. to CJ. c.c. to HG. c.c. to Ds. c.c. to BY. E.A.C.111. SERVO. F =… | ||
| Scan63 | Comparative tests of Goshawk dynamo brush materials. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. ORIGINAL Expt. No.4333 REF EFC3/T10.12.23. To R & E. from EPC. c. CJ. & PN. c. By. DA. EP. GOSHAWK DYNAMO BRUSH TESTS. Further to (1)… | ||
| Scan64 | Concluding a test on EGO and EG2 brushes as alternative supplies for the standard Z brushes. | ||
| View original record | Contd. -2- RWE3/T10.12.23. It will be seen from the results, that the EGO and EG2 brushes may be considered to be very nearly equally as good as the present standard Z brushes, and that either of… | ||
| Scan65 | Test report on Morganite brushes on Goshaw Dynamos. | ||
| View original record | RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: EFC Order No: AB.96 Customer's No.: 1 X4333. Repeat Tests of EGO & EG2 Morganite Brushes on Goshaw Dynamos A set… | ||
| Scan66 | Instruction sheet detailing a comparison test of different grades of commutator brushes. | ||
| View original record | RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To Order No Customer's No. 2 19 EG2. Sparking about the same; commutator slightly better, but not so uniform as with… | ||
| Scan67 | Tests to determine the friction loss when applying the front brakes. | ||
| View original record | R.R. 493A (40 H) (BL 42 12-7-23). J.H., D. ORIGINAL EXPERIMENTAL REPORT. Expl. No. 9940 REF: Hs/S.D./10.12.23. To R. from Hs. c. to CJ. c. to RC. c. to De. c. to BY. ----------------- BRAKES. -------… | ||
| Scan68 | Brake pedal pressure distribution for the front brakes only. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: HS/AD/L.RHO.12.21 EAC-111 BRAKE PEDAL PRESSURE DISTRIBUTION. (To front brakes only). Front brake equaliser (locked)… | ||
| Scan69 | Front brake system performance and mechanical efficiency. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H.D. EXPERIMENTAL REPORT. Expl. No. 9940 REF: HH/ADLTC.12.23. Front brake equaliser (locked) Pressure distributor (servo connection locked) w = pressure applied at… | ||
| Scan70 | Modifications to the floating fulcrum brake system using jointed shoes. | ||
| View original record | R.B. 493A (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL Expl. No. 9940 REF: Hs5/L/10.12.23. EXPERIMENTAL REPORT. To R. from Hs. c.c. to CJ. c.c. to RG. c.c. to Ds. c.c. to EY. BRAKES. With the jointed… | ||
| Scan71 | Fitting an original EAC engine to a standard 40/50 HP chassis with front-wheel brakes. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. ORIGINAL EXPERIMENTAL REPORT. Expl. No. 9770 REF: Hsg/LCLG.12.23. To R. from Hs. c. to CJ. c. to EJ. E.A.C-11. The original EAC. engine which we have been… | ||
| Scan72 | The testing of 'HALO' brake material on a 20 HP car, comparing its friction and endurance against Ferodo. | ||
| View original record | To R. from Hs. c. to CJ. Rg. c. to Da. BY. ORIGINAL Hs5/LG12.12.23. 'HALO' BRAKE MATERIAL. M4888 We have been running some of this material for some time on a 20 HP. car. Under ordinary brake… | ||
| Scan73 | Proposed modification to the E.A.C. switchbox to prevent headlights from being used without the charging switch engaged. | ||
| View original record | SECRET E.A.C. EFC3/T20.12.23. To R. from EFC. c. CJ. BJ. RG. c. E. DA. BY. c. HS. PN. X.9730. E.A.C. SWITCHBOX. Reference your R4/M17.12.23, modifications being in hand for the E.A.C. switchbox, would… | ||
| Scan74 | Test results for a 110° Camshaft on a 40/50 HP engine compared to other engines. | ||
| View original record | To R. from Hs. c. to CJ. c. to RG. c. to E. c. to Da. c. to OY. ORIGINAL Hs1/LG21.12.23. 40/50 INDICATOR DIAGRAM. X4580 X4229 X3056 The tests given in the attached report were taken in connection with… | ||
| Scan75 | Comparing the 40/50 HP engine to the 20 HP engine using an indicator diagram. | ||
| View original record | B.R. 403A (40 H) (SL 42 12-7-23). J.H. D. ORIGINAL EXPERIMENTAL REPORT. Expl. No. 4580 REF: Ha/Bal/1.0201.223. To R. from Hs. c. to CJ. c. to RG. c. to H. c. to De. c. to OY. 40/50 HP. INDICATOR… | ||
| Scan76 | Negative work caused by gas backflow into the induction pipe when the inlet valve opens at 2000 RPM. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Exptl. No. 4580 REF: Hsl/Hs/10. appear that when the inlet valve opens, owing to the fact that at 2000 r.p.m. there is a depression of… | ||
| Scan77 | Indicator diagrams showing engine pressure and performance metrics relative to crankshaft position. | ||
| View original record | 40/50 INDICATOR DIAGRAM TDC EC IO EO IC BDC 40/50 110° CAMSHAFT COMPRESSION RATIO 3.9-1 2000 R.P.M. 77.1 H.P. 13° C AIR TEMP. 763 mm BAR. COOLING WATER 80°C I.M.E.P. 91 LBS/SQ" B.M.E.P. 67.4 LBS/SQ"… | ||
| Scan78 | Tests insulating the exhaust to reduce heat on the floorboards and under the scuttle for the 40/50 model. | ||
| View original record | To R. from Hs. c. to CJ. Da. c. to RG. BY. E. to E. OY ORIGINAL CANCELLED Hs2/LG21.12.23. 40/50 - HEAT ON FLOORBOARDS AND UNDER SCUTTLE. X819 X4613 We carried out a further series of tests of… | ||
| Scan79 | Reducing heat on the floorboards and under the scuttle of a 40/50 HP car. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 819 REF: Hsl/LG11.12.23. To R. from Hs. c. to CJ. c. to RG. c. to E. c. to Da. c. to BY. c. to OY. 40/50 - HEAT ON FLOORBOARDS… | ||
| Scan80 | Modifications to reduce floor and scuttle temperature. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 819 REF: Hs1/LG11.12.23. of air which passes through which counts. In order to reduce the floor and scuttle temperature the… | ||
| Scan81 | Modifying the 40/50 model's undershield for mud protection and testing cork covering for floorboards. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 819 REF:Hsl/LGl.12.23. the 40/50 is unnecessarily long as a protection from mud. We cut away the centre of the undershield up… | ||
| Scan82 | Tests with a double dash air insulated dashboard to address complaints of cold feet. | ||
| View original record | R.R. 493A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expl. No. 819 REF: Hs / LG11.12.23. making further tests with the double dash air insulated dash-board. We believe the improvements we… | ||
| Scan83 | Temperature test results comparing different car modifications against a standard configuration to reduce heat in the cabin. | ||
| View original record | CONDITION OF CAR. First Table: | CONDITION OF CAR. | Atmos-pheric temp. | Temp. of air at rear of Radiator. (A) | Temp. of air at pedal slots. (B) | Temp. of air under scuttle. (C) | Dash-board temp.… | ||
| Scan84 | Graph showing the relationship between radiator water temperature and the air temperature at the rear of the engine fan under different conditions. | ||
| View original record | RELATION BETWEEN WATER TEMP. AND TEMP AT REAR OF FAN WATER BROUGHT TO 100°C AT COMMENCEMENT OF TEST AND READINGS TAKEN AS TEMPERATURE FALLS NO THERMOSTAT. NO BAFFLE PLATES AIR TEMP ENTERING RADIATOR… | ||
| Scan85 | Two graphs showing the results of experiments to reduce floor-board temperature under various conditions. | ||
| View original record | EXPERIMENTS TO REDUCE FLOOR-BOARD TEMPERATURE. RISE IN C° ABOVE ATMOSPHERIC TEMPERATURE. STANDARD CONDITION I PEDAL SLOTS FILLED IN. II AS IN I FLYWHEEL GUARD AND UNDERSHIELD ALTERED III AS IN I & II… | ||