Rolls-Royce Archives
| Identifier | Entry | ||
| Scan0 | Graph showing the increase of Hispano steering leverage relative to the E.A.C. V series. | ||
| View original record | HISPANO STEERING. INCREASE OF LEVERAGE REL. TO E.A.C. V PERCENTAGE INCREASE OF HISPANO LEVERAGE RELATIVE TO E.A.C. V SERIES 60 50 40 30 20 10 0 L.H. LOCK. 300° 200° 100° 0 100° 200° 300° R.H. LOCK.… | ||
| Scan1 | Graph plotting steering leverage and the instantaneous ratio of steering wheel to stub axle rotation. | ||
| View original record | STEERING LEVERAGE. INSTANTANEOUS RATIO: ROTATION OF STEERING WHEEL ROTATION OF STUB AXLE. E.A.C. 'V' SERIES STEERING LEVERAGE. ROTATION OF STEERING WHEEL L.H. LOCK 300° 200° 100° 0 100° 200° 300° R.H.… | ||
| Scan2 | Graph plotting the instantaneous ratio of steering wheel rotation against stub axle rotation for a Hispano-Suiza system. | ||
| View original record | STEERING LEVERAGE. INSTANTANEOUS RATIO. ROTATION OF STEERING WHEEL ROTATION OF STUB AXLE. Y-AXIS LABELS: L.H. LOCK 400° 300° 200° 100° 0 100° 200° 300° 400° R.H. LOCK ROTATION OF STEERING WHEEL X-AXIS… | ||
| Scan3 | The Mentor full charge or excessive voltage indicator. | ||
| View original record | R.R. 493A (50m) (D.B. 173 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. 4122 REF: EFC1/T8.4.25. To R. (at Le Canadel). c. E. De. c. Rg. By. c. CJ.& PN. c. EP. MENTOR FULL CHARGE OR EXCESSIVE VOLTAGE… | ||
| Scan4 | Instruction sheet regarding a special screw-cap lamp with a helical filament. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. To_____________________19 Order No.____________ Customer's No. 3 and coil together pass .21 ampere The lamp is somewhat special as it is of the screw-cap type similar to… | ||
| Scan5 | The testing and adjustment of an electrical instrument's voltage-sensitive contacts and heating coil. | ||
| View original record | RR.238 (150 BKS.) (SH57.29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To______________________19___ Order No._________________ Customer's No. 2. As received, the instrument was found to operate… | ||
| Scan6 | Instructions on the function of a Meuter over-voltage indicator instrument. | ||
| View original record | RR 239 (50 BKS.) (SH57. 29-6-20.) MP 224359 ROLLS-ROYCE LTD. INSTRUCTIONS. To EFC. Order No. AC.44. Customer's No. X.4122 7. April 1925. Meuter Over-voltage Indicator. This instrument consists of a… | ||
| Scan8 | Cracked induction pipe bends and proposed modifications. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. ORIGINAL Expl. No. 8070 REF: HS6/LG15.4.25. EXPERIMENTAL REPORT. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. S E C R E T. EAC. 'V'… | ||
| Scan9 | Road tests of throttle governor alterations. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF Hs/Rm2/LG31.4.25. THROTTLE GOVERNOR TESTS. These tests were carried out on the road to demonstrate the relative value of… | ||
| Scan10 | Diagnosing and rectifying a high-speed lag issue by addressing friction in the camshaft and governor system. | ||
| View original record | R.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF: Ha/Rn/L021.4.25. a considerable lag at high speeds. The fact that the lag was at high speeds, where the throttle… | ||
| Scan11 | Butterfly throttle control issues due to unbalanced motion and spring-induced load. | ||
| View original record | R.R. 493A (50m) (D.B. 173 25-9-24) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF Hs/Rm/LG21.4.25. butterfly throttle at low speeds due to unbalanced motion. An additional cause of load on the hand… | ||
| Scan12 | Tests conducted on an E.A.C. throttle governor to address performance complaints. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF Hs/Ru/LG21.4.25. E.A.C. THROTTLE GOVERNOR. We have carried out a number of tests on this unit to induce its performance to… | ||
| Scan13 | Investigations into the EAC throttle governor. | ||
| View original record | R.R. 403 (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. COPIES TO RCJ BJ WOR By E. Da RG Expl. No. 8140 REF. HSJ/LGM.4.25. OBJECT OF TEST. TESTER. Investigations on EAC. THROTTLE GOVERNOR. W.… | ||
| Scan17 | Performance data graphs for an E.A.C. throttle governor. | ||
| View original record | E.A.C. THROTTLE GOVERNOR DATA GOVERNOR PULLS TAKEN AT THE END OF LEVERS E 72643 & E 1018 DOTTED LINES EXTREMES OF ANGULAR MOVEMENT OF GOVERNOR WEIGHTS LBS PULL AT LEVER EXTREMITY ENGINE R.P.M. MEAN… | ||
| Scan18 | Tests for an ignition oil relay leather piston ring. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: Hs/GHR/LG21.4.25. IGNITION OIL RELAY LEATHER PISTON RING. Tests carried out on 8-EAC-11 unit. Chrome leather ring of wider… | ||
| Scan19 | Cup leather failures in EAC engines due to high oil temperatures and oil viscosity. | ||
| View original record | R.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -4- Expl. No. REF: Hs/Rm1/LG21.4.25. particular spot. Whenever a cup leather failed it was found twisted over to the top side of the… | ||
| Scan20 | Issues with a sticking magneto and failures of cup leathers. | ||
| View original record | R.R. 493A (50R) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF: HS/Rm1/LG21.4.25. The magneto also had a tendency to stick partially advanced if the engine was suddenly stopped when… | ||
| Scan21 | Modifications made to the ignition advance, control springs, and associated linkage. | ||
| View original record | R.R. 493A (50M) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF Hs/RmL/LG21.4.25. in the pipes or realy on assembly rather than dirt working up from the sump. Neither of the 10,000… | ||
| Scan22 | Modifications to the oil relay ignition governor, focusing on piston sticking issues. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF Hs/Rm1/LG21.4.25. OIL RELAY IGNITION GOVERNOR. We should like to recapitulate the modifications which have been made to… | ||
| Scan23 | Investigations and tests of an oil relay governor. | ||
| View original record | EXPERIMENTAL REPORT. COPIES TO: (RCJ) (BJ) WOR By E. Da. (RG) PNJOY Expl. No. 8685 OBJECT OF TEST. Investigations on oil relay governor. TESTER. W. A. Robotham. CONDITIONS. Road test and bench test.… | ||
| Scan24 | Graph showing the ignition advance curve for an ignition relay governor under extreme working conditions. | ||
| View original record | IGNITION RELAY GOVERNOR. CONTROL SPRING E.73203 CHROME CUP LEATHER ALL BACK-LASH TAKEN OUT OF CONTROLS. FLYWHEEL IGNITION ADVANCE POWER MAINTAINED. POWER DROPS 5% OIL TEMP. 60°-70°C. OIL PR. 25-35… | ||
| Scan26 | Improvement to the throttle governor control shaft using ball bearings. | ||
| View original record | To E. from Hs. ORIGINAL Hs2/LG21.4.25. THROTTLE GOVERNOR CONTROL SHAFT. 48140 The scheme for using ball bearings on the governor operating shaft has made a very definite improvement. We attach… | ||
| Scan27 | Secret memo regarding a steering column failure on a 'V' Series car after 5,400 miles in France. | ||
| View original record | 48430 To R. from Hs. c. to CJ. BJ. c. to RG. R. c. to DA. BY. c. to Wor. ORIGINAL Hs4/LG22. 4. 25. S E C R E T. EAC. 'V' SERIES - STEERING COLUMN FAILURE. Attached herewith is a sketch showing where… | ||
| Scan28 | The construction and testing of a six-compartment Dagenite cell case battery for a 20 HP chassis. | ||
| View original record | -5- Contd. The remarks under (Bc) above again apply exactly in this case, it being clear that the combination of ebonite and wood is definitely better than wood alone, and further that in all… | ||
| Scan29 | Comparison of ebonite and wood separators of varying thickness in battery cells. | ||
| View original record | -4- Contd. suggest that ebonite separators a good deal thicker, at the expense of the wood, would be a better job. As in (Aa) above, comparison of the thin and thick plates, though rather… | ||
| Scan30 | The condition of wood and ebonite separators within battery cells. | ||
| View original record | -3- Contd. The wood separators in these cells (no ebonite) were double ribbed in the 7-plate, and single ribbed in the 9-plate, the ribs being adjacent to the positive plates. The separator condition… | ||
| Scan31 | Comparative analysis of battery cell components, specifically different types of plates and separators. | ||
| View original record | -2- Contd. Since all cells have been subject to identical treatment the battery affords two principal comparisons :- (A) That as between 9 thin and 7 thick plates. (B) That as between wood and ebonite… | ||
| Scan32 | Diagram illustrating various types of battery plate sections and separator materials. | ||
| View original record | -18- Contd. BPT.9 PLATE SECTIONS. (THIN PLATES) EBONITE AND WOOD SEPARATORS. BDT.7 PLATE SECTIONS. (THICK PLATES) EBONITE AND WOOD SEPARATORS. BPT.9 PLATE SECTIONS. (THIN PLATES) WOOD SEPARATORS.… | ||
| Scan33 | The disassembly and testing of a Peto & Radford Composite battery from a 20 HP chassis. | ||
| View original record | EFCL/T22.4.25. X.4414P. PETO & RADFORD BATTERIES. Report after dis-assembling of the components of the P & R, RR. 20 HP. size chassis battery, known as the P&R. Composite. --------------------- This… | ||
| Scan34 | Battery variations, discussing cell disposition, and the use of ebonite and wood separators. | ||
| View original record | Contd. -2- EFCB/T22.4.25. which we haven which differ from the present battery in the disposition of the various cells only. In fact the variations which are contained in the present battery are… | ||
| Scan35 | The inspection and comparison of a 9-plate Peto & Radford battery with the standard 7-plate model. | ||
| View original record | To R & E. from EFC. c. CJ. & PN. c. By. Da. c. Wd. Wor. c. Mr.Minchin ( P & R) X.4414P - PETO & RADFORD BATTERIES. 20 HP. Y4600 Herewith please receive copy of a report on a P & R battery which we… | ||
| Scan36 | Secret memo discussing the throttle governor control, friction issues, and pedal movement specifications for EAC 'V' Series cars. | ||
| View original record | ORIGINAL To E. from Hs. S E C R E T. Hs8/LG27.4.25. EAC. 'V' SERIES. THROTTLE GOVERNOR. +8740 We are very anxious to get your scheme for using the ball bearings on the governor control. We have been… | ||
| Scan37 | Follow-up report on a Peto & Radford 20 HP battery inspection, discussing test conditions and cell performance. | ||
| View original record | To R. & E. from EFC. c. CJ. & PN. c. Da. Ey. c. Wd. Wor. EFC1/T28.4.25. X.444P. PETO & RADFORD BATTERIES. 20 HP. Further to our EFC2/T22.4.25, dealing with the opening up and inspection of a battery… | ||
| Scan38 | The testing of fabric couplings on a joggling rig. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF Hs4/LG29.4.25. To. P. from Hs. c. to Ol. Hs. c. to EH. Hs. c. to BG. Hs. c. to W&R. Ltd. S E C R E T. REPORT ON FABRIC… | ||
| Scan39 | Preliminary report detailing a series of tests performed on various fabric couplings. | ||
| View original record | PRELIMINARY REPORT ON FABRIC COUPLING TESTS. NO. | TYPE. | NO. OF REVERSALS. | TIME RUN. HRS. MINS. | REMARKS. 1 | Std. Hardy fabric with R.R. Plates to Drg. 73383. Disc .500" thick. | 61,780 | 1 48… | ||
| Scan41 | Graph showing E.A.C. engine heat flow to cooling water against B.HP at a constant speed of 1500 RPM. | ||
| View original record | E.A.C. ENGINE, HEAT FLOW TO COOLING WATER ENGINE SPEED CONSTANT AT 1500 R.P.M. NO 1. SHOWS FALL IN HP & HT. FLOW AS BACK PRESSURE INCREASES. NO 2. SHOWS FALL IN HP & HT. FLOW AS THROTTLE IS CLOSED.… | ||
| Scan42 | Graph showing the heat flow to cooling water with increasing exhaust back pressure for an E.A.C. engine at a constant 1500 RPM and 50 B.HP | ||
| View original record | HEAT FLOW TO COOLING WATER WITH INCREASING EXHAUST BACK PRESSURE. E.A.C. ENGINE. AT 1500 RPM. AND 50 B.H.P. THE SPEED & H.P. IS CONSTANT FOR THIS TEST. AS THE EXH. BACK PRESSURE IS INCREASED THE POWER… | ||
| Scan43 | Results of a fabric coupling test and its real-world performance. | ||
| View original record | To R. from Hs. c. to E. c. to St. (W.W.) ORIGINAL Hs5/LG29.4.25. FABRIC COUPLING TEST. X8305 You will see on attached print that the load on the reversal load is much less than ax I led you to believe… | ||
| Scan45 | Preliminary report on a series of fabric coupling tests. | ||
| View original record | PRELIMINARY REPORT ON FABRIC COUPLING TESTS. No. | TYPE | NO. OF REVERSALS. | TIME RUN HRS. MINS. | REMARKS. 1 | Std. Hardy fabrics with RR. Plates to Drg. G.73383. Disc .500" thick. | 61,780 | 1 48½… | ||
| Scan46 | Tests on fabric couplings using a joggling rig. | ||
| View original record | R.R. 493a (50n) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. ST. SECRET. REPORT ON FABRIC COUPLING TEST. We are carrying… | ||
| Scan47 | 10,000-mile test on an EAC 'V' Series car (93-NK) in France. | ||
| View original record | To R. from Hs. c.c. to CJ. BJ. c.c. to RG. E. c.c. to DA. EY. c.c. to Wor. ORIGINAL SECRET Hs1/LG2.5.25. 10,000 MILES TEST ON EAC. 'V' SERIES X8940 CAR IN FRANCE Attached is a report on 93-NK car… | ||
| Scan48 | The condition of a vehicle's suspension, radiator, and underbody, detailing a dynamo failure and a query about returning to England. | ||
| View original record | -3- Steering box suspension. The suspension is now as good as when fitted. The reason for steering improving since being fitted up is due, in my opinion, to the thrust race in column settling down. We… | ||
| Scan49 | Inspection report detailing the condition and required adjustments for various vehicle components, including axles, clutch, and exhaust. | ||
| View original record | -2- contd :- Front axle. Pivots and bearings O.K. Brake operating shafts with larger bearings - no wear is noticeable. Front springs well lubricated, and all leaves O.K. Rear anchorage brackets of… | ||
| Scan50 | Chassis 93-NK after 7,960 miles of use. | ||
| View original record | Hotel de France, Chateauroux, Indre, France. To Ms. from G.W.Hancock. REPORT ON CHASSIS 93-NK AFTER 7,960 MILES. ENGINE. Engine power good. Compressions even. Valves and fitting to E.72217.B. These… | ||
| Scan51 | The mileage testing of Redmanol encased battery ignition coils. | ||
| View original record | To R. A. & E. from EFC. c. CJ. & FN. c. Ds. Hy c. Wor. Rg. ORIGINAL EFC3/T4.5.25. X.4079b -> REDMANOL ENCASED BATTERY IGNITION COILS. ------------------------------------------------- Further to our… | ||
| Scan52 | Bumping test of an India chassis rear, noting a dumb iron failure due to poor brazing. | ||
| View original record | R.R. 403 (40 H) (SL 42 12-7-25). J.H., D. ORIGINAL EXPERIMENTAL REPORT. COPIES TO: RCJ BJ WOR By E Da EP. PNT OT. RG Expl. No. 4268 5380 REF. Hs1/LGS.5.25. OBJECT OF TEST. Bumping test on the rear of… | ||
| Scan54 | The first road test of an 'India' model with 4-wheel brakes, detailing brake, steering, and gearbox performance. | ||
| View original record | R.R. 493A (50M) (D.B. 175 25-9-24) J.H.D. 1st ROAD TEST ON JO & 4 SPEEDS & FNB EXPERIMENTAL REPORT. Expl. No. REF: Hss/104.B.25. To R. from Hs. c. to CJ. BJ. c. to Rs. E. c. to BY. DA. c. to Wor. S E… | ||
| Scan55 | The production and testing of 'India' type cars with and without 4-wheel brakes. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF Hs3/LG4.5.25. To R. from Hs. c. to CJ. BJ. c. to RE. E. c. to DA. BY. c. to Wor. S E C R E T. X5770 X5740 'INDIA' WITH AND… | ||
| Scan56 | Rear axle, spring and dumb iron failures on a 20 HP 'India' chassis with a wider track. | ||
| View original record | R.R. 493a (50n) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: Hs/LG/LS/6.5.25. 20 HP. 'INDIA' CHASSIS WITH WIDER TRACK - 56" Bumping rear axle. Drum r.p.m. 105. Cams 2". After running… | ||
| Scan57 | Circuit diagram of the condenser and contact points for an R distributor, for both positive and non-positive earthing connections. | ||
| View original record | DIAGRAM OF THE CONDENSER AND CONTACT POINT CIRCUIT SHOWING THE VARIOUS POINTS OF CONTACT OF R DISTRIBUTOR (20H.P. AND E.A.C.) LEFT DIAGRAM: WITHOUT POSITIVE EARTHING CONNECTION L.T. TERMINAL CONDENSER… | ||
| Scan58 | Instructions regarding a contact breaker screw, grip connection, and an attached illustrative diagram. | ||
| View original record | Contd. -6- EPC4/T7.5.25. contact breaker screw may be an offender, and that special care should be taken to ensure that this is clean and that the grip connection is definitely tight. This connection… | ||
| Scan59 | Analysis of an earthing connection for the distributor and condenser case on a 20 HP model. | ||
| View original record | Contd. -5- EFC4/T7.5.25. in that it does not go directly from the condenser case to the chassis frame - in fact the only real useful portion of it is that which affects the IC branch, viz. that… | ||
| Scan60 | Improving electrical connections for ignition systems, emphasizing cleanliness and design superiority. | ||
| View original record | Contd. -4- EPC4/T7.5.25. Although it is difficult to get definite evidence on a point of this nature, we have a certain amount of experimental evidence that the operation of points has been definitely… | ||
| Scan61 | The importance of minimizing inductance and ohmic resistance in ignition system circuits. | ||
| View original record | Contd. -3- EFCH/T7.5.25. (1) The absolute minimum inductance in this circuit - hence the necessity of placing the condenser mechanically as close to the points as possible. (2) The absolute minimum of… | ||
| Scan62 | Technical analysis of the electrical characteristics and requirements of an ignition system's local circuit. | ||
| View original record | Contd. -2- RFC4/T7.5.28. good contact connections. After the contact points break has taken place, the current in the IC circuit is of the nature of a high frequency alternating current, the order of… | ||
| Scan63 | Explaining the circuit connections for a battery ignition system. | ||
| View original record | To R. & E. From EPC. c. CJ. & Ph. c. HY. Ds. c. Wor. Eg. EFC4/T7.5.25. BATTERY IGNITION CIRCUIT CONNECTIONS. Below is a simplified diagram of an ignition circuit (including magneto ignition) There are… | ||
| Scan64 | 'dirting up' of contact breaker points in the ignition circuit, comparing the EAC and 20 HP models. | ||
| View original record | To R. Contd. -2- EFC3/T7.5.25. will shortly receive. At the same time we have impressed upon production, both office and shopp, the great desirability of very clean pressure contact connections in the… | ||
| Scan65 | Dynamo and ignition contact point issues. | ||
| View original record | To R. from EFC. Reference your R4/M5.5.25, I think thee origin of your query is the report GWH3/Crn28.4.25 sent to you under cover of Hsl/LG2.5.25. The cessation of the dynamo functioning was due to… | ||
| Scan66 | Potential commutation and overheating issues and the performance of brushes on a 29 coil armature. | ||
| View original record | Contd. -4- EFC4/T9.5.35. Though there may be some little criticism of the present output curve, we feel we are perfectly safe as regards:- (1) Commutation troubles (2) Overheating, not having forced… | ||
| Scan67 | Improving dynamo performance through modifications to brush holders and air gap adjustments. | ||
| View original record | Contd. -3- EFC4/T9.5.25. brush holders for the main brushes and the EAC. type of 20 HP. control brush holder for the control brush; or some arrangement similar thereto, by which we reduce the… | ||
| Scan68 | Modifying dynamo brush dimensions to improve output at slower speeds. | ||
| View original record | EFC4/T9.S.25. -2- Contd. we do not regard the dynamo as being one whose main function is to give more output, but one which is capable of giving the output at a slower speed If it is agreed that the… | ||
| Scan69 | Investigation into EAC dynamo performance concerning a change in armature and circumferential brush widths. | ||
| View original record | To R. from EFC. c. CJ. c. EY. EY/ED. X.8660. EAC. DYNAMO. - CIRCUMFERENTIAL BRUSH WIDTHS. ------------------------------------------------- The change in the armature of the EAC. dynamo from the 29… | ||
| Scan70 | The condition of a vehicle's exhaust, undercarriage, and electrical systems. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -5- Expl. No. REF: GWH/Cm8.5.25. EXHAUST SNOUT. This is quite satisfactory. EXHAUST CUTOUT. We have had no further trouble with this -… | ||
| Scan71 | The condition and performance of various vehicle components after mileage. | ||
| View original record | EXPERIMENTAL REPORT. side will have to be made a better fit, as considerable amount of grit and sand gets on to pedal bearings. EXHAUST SILENCER. The lagging on the front silencer has burst right open… | ||
| Scan72 | The condition and cracking of C.S. Springs (Firths). | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF: CEN/Cm8/5.25. C.S. Spring (Firths) to Drg. F.71975 - 1150 lbs. Leaves. | Condition. | Where cracked. | Approx. length… | ||
| Scan73 | Engine condition, front axle, and a comprehensive analysis of front spring leaf failures. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF: GWM/Cms. 5. 25. There is a fair amount of carbon deposit on piston heads. Engine generally is clean and free from oil… | ||
| Scan74 | Chassis 93-NK after completing 12,235 miles. | ||
| View original record | R.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: GWH/Cwm8.5.25. COPY. To Mr. From G.W.Hancock. REPORT ON CHASSIS 93-NK AFTER 12,235 MILES. ENGINE. Engine power good and… | ||
| Scan76 | Issues found with the 'India' model with front wheel brakes before a 10,000-mile test. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: Hs8/LG12.5.25. To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY's c. to Wox. S E C R E T ! X5770 X5840 'INDIA' WITH… | ||
| Scan77 | Investigation into oil lubrication for the 'India' 4-speed gearbox worm and worm wheel. | ||
| View original record | To R. from Hs: c.c. to CJ. BJ. c.c. to RG. E. c.c. to DA. BY. c.c. to Wor. ORIGINAL S E C R E T! Hs2/LG16.5.25. 'INDIA' 4-SPEED GEARBOX. Investigations show that very little oil gets on to the worm… | ||
| Scan78 | Front axle torsion and servo efficiency tests. | ||
| View original record | R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: Hs/Rm/LG20.5.25. FRONT AXLE TORSION. Tests made by pulling front brakes on by means of main brake ropes, and a hold fast… | ||
| Scan79 | The brake distribution and leverage for the 'India' four-wheel brake system. | ||
| View original record | R.R. 493A (50B) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. ORIGINAL REF:Hs4/LG20.5.25. To R. from Hs./Rm. c. to CA./BJ. c. to RG./E. c. to DA./EY. c. to Wor. S E C R E T. 'INDIA' - FOUR… | ||
| Scan80 | Mostly blank cover sheet overlying a blue document. | ||
| View original record | -4C | ||
| Scan81 | The proposed design and experimentation of an iron core coil to improve spark utility. | ||
| View original record | Contd. -2- EFC2/TRO.5.25. closed circuit type of coil somewhere, having observed sparks of greater utility (capable of overcoming leaky gaps) from such coils, though he does not express a definite… | ||
| Scan82 | Potential experiments and improvements for ignition coils. | ||
| View original record | 3 To R. from EFC. c. CJ. c. Ev. [Stamped: ORIGINAL] EFC2/T20.5.25. RE IGNITION COILS. [Handwritten: X4079 X8710 X4653 X4654] Reference your EL/M11.5.25, now that our ignition coils are consistently… | ||
| Scan83 | Experiments on annealed copper dynamo commutators compared to hard-drawn copper. | ||
| View original record | ORIGINAL To R & E. from RFC. c. CJ. & FN. c. HY. RG. WOR. EFCS/T20.5.25. DYNAMO - ANNEALED COPPER COMMUTATOR. XL4333 ==================================== We have completed a series of experiments on… | ||
| Scan84 | Data table detailing chassis load, movement, and wear allowances for different models. | ||
| View original record | -2- Hs/Hsl/LG23.5.25. CHASSIS. | Load applied to axle lever. | Resultant movement at end of lever due to spring in linkage. | Total available movement at lever extremity. | Movement lost taking up… | ||
| Scan85 | 'India' front axle brake levers fouling the axle during brake application. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF Hs/RmL/LG23.5.25. ORIGINAL To R. from Hs/Rn. c. to CJ. BJ. c. to RG. E. c. to DA. EY. c. to Wor. S E C R E T. 'INDIA' FRONT… | ||
| Scan86 | Spring failures, showing test duration, chassis position, fracture details, and material properties. | ||
| View original record | R.R. 493A (50B) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF Hs/L/LG22, 5.25. SPRING FAILURES. | Life of spring. hrs.mins. | Piece No. | Position on chassis. | Position of fracture to… | ||
| Scan87 | The failure of chassis cross members and spring stops during testing. | ||
| View original record | R.R. 485a (50m) (D.B. 173 25-9-24) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF: Hs/LS/LG22.5.25. 2nd. cross member (channel shaped (F.51101) sheared through 3 1/4" from off-side frame member and… | ||
| Scan88 | Bump test of a 20 HP 'India' chassis, detailing frame specifications and breakages. | ||
| View original record | B.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: Hs/LS/LG22.b.25. BUMP TEST OF 20 HP. 'INDIA' CHASSIS. Bumping rear axle. Drum r.p.m. 105. 2" lift cams, one on each drum… | ||
| Scan89 | Bumping test for an 'India' Rear Axle with a wider track. | ||
| View original record | R.R. 493 (40 H) (SL 42 12-7-23). J.H. D. ORIGINAL EXPERIMENTAL REPORT. COPIES TO: (R.C.) (B.J.) WOR. By. E. Da. EP. PN. OY. Expl. No. V5350 +4268 REF. Hs2/LG23.5.25. OBJECT OF TEST. TESTER. Bumping… | ||
| Scan90 | Servo braking efficiency and distribution in relation to car weight. | ||
| View original record | (2) "Incidentally in the instructions given in " HS1/LG9724. for testing the EAC.3. servo effic- " iency, it appears that the ratio of rod loads " is expected to come within the limits given on " the… | ||
| Scan92 | Continuation of an inspection report on the condition of various mechanical components. | ||
| View original record | contd :- -5- GWH2/Crn30;5.25. ***************** bearing supports, equalising shafts and brackets, bearings on intermediate shafts of servo, frame and cross tubes - these are all in a sound condition… | ||
| Scan93 | The condition of various vehicle components. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -4- Expl. No. REF GW12/Cm20.5.25. RADIATOR & SHUTTERS. Radiator is still O.K. The suspension of radiator - see our previous reports.… | ||
| Scan94 | Performance and issues with various vehicle components including the exhaust, clutch and steering. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF: GHM12/Crn20:15.25. almost absent. This, as previously reported, is due to the thin aluminium not being suitable for… | ||
| Scan95 | The examination and condition of various vehicle components after testing, including engine, axle, and springs. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF: CWH2/Cm20.5.25. examination and was found choked with dirt. We have cleaned this and refitted it. Oil relief valve… | ||
| Scan96 | The condition of Chassis 93-NK after 15,447 miles of testing. | ||
| View original record | R.R. 493A (50M) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. C O P Y. Expl. No. REF: Hs/GWH12/Cm20525. To Hs: from G.W.Hancock: REPORT ON CHASSIS 93-NK AFTER 15,447 miles. ENGINE. Engine power good… | ||
| Scan97 | Cover memo for an attached report from France regarding car 93-NK after 15,447 miles. | ||
| View original record | To R : from Hs. c.c. to CJ. BJ. c.c. to RG. E. c.c. to DA. BY. c.c. to Wor. ORIGINAL Hs2/LG27.5.B5. REPORT ON 93-NK CAR AFTER 15,447 MILES. +8940 We attach a copy of report we have received from… | ||
| Scan99 | Performance graph comparing representative output curves of E.A.C. and 20 HP dynamos against RPM and MPH. | ||
| View original record | AMPERE OUTPUT REPRESENTATIVE OUTPUT CURVES E.A.C DYNAMO & 20 H.P DYNAMO SPECIFIED PERFORMANCES (CONTROL BOARDS SET HOT) CURVE LABELS: E.A.C. Output Representative E.A.C. Output Representative 20 h.p.… | ||
| Scan100 | Graph showing specified and representative output curves for E.A.C. and 20 HP dynamos. | ||
| View original record | [ "ORIGINAL", "N", "AMPERE OUTPUT", "E.A.C. SPECIFIED OUTPUT", "E.A.C. 29 COIL ARMATURE", "E.A.C. 57 COIL ARMATURE", "20 H.P. SPECIFIED OUTPUT", "20 H.P. 29 COIL ARMATURE", "20 H.P. 57 COIL ARMATURE",… | ||
| Scan101 | Dynamo performance curves, comparing different armatures and suggesting improvements. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. -2- EXPERIMENTAL REPORT. Contd. Expl. No. REF: EFC1/T28.5.25. Except in the case of the 85 C curve on sheet P, all the curves are for a dynamo carcase… | ||
| Scan102 | New and previous performance curves for dynamos. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. 8660 REF: EFCL/T28.5.25. To R & E. from EFC. c. CJ. & PN. c. By. Da. c. EP. Rg. Wor. ORIGINAL ++ RE DYNAMOS. X4610 We now issue… | ||
| Scan104 | Secret memorandum discussing torque multiplication and rod loads for the India 4-wheel brake system. | ||
| View original record | ORIGINAL TO HS. FROM DA. SECRET. DA1/M29.5.25. INDIA - 4 WHEEL BRAKES. x5940 Thank you for your HS/RM/LG27525. On the diagram attached to HS2/LG8724. the ordinates are definite-ly stated to be torque… | ||
| Scan107 | Reporting a broken N.S. front spring on a 20 HP car during tests in France. | ||
| View original record | To R. from Hs. c.c. to CJ. RJ. c.c. to RG. E. c.c. to DA. EY. c.c. to Wor. ORIGINAL 9-G-111. Hs4/LGS.6.25. X5840 (crossed out) X5410 TESTS IN FRANCE ON 20 HP. PLUS F.W.B. We have received a wire from… | ||
| Scan108 | Broken front spring after 2,500 miles during testing in France. | ||
| View original record | Handwritten: HS to R 9 GTU in France - FNB Front spring broken at 2,500 miles Crossed out handwriting: Y 2410 X 2410 Typed: UT/JG/24.8.35 to JT from BM to CR .LS to DV .YW to CT .AC to CF .OE TESTS IN… | ||
| Scan109 | Mr. Royce's views on direct braking versus servo power, with calculations for modifying brake components. | ||
| View original record | TO HS. FROM DA. Copy to RG. BY. SECRET. DA1/M9.6.25. INDIA. V5940 X5370 PROPORTIONS OF BRAKING. With further reference to HS/RM2/LG27525., Mr. Royce does not approve of the suggestion to reduce the… | ||
| Scan110 | Adjustments to the proportions of direct and servo-assisted braking. | ||
| View original record | [Handwritten] DA AS INDIA 6.as.a.ENGLAND Braking Mr Royce does not want * / mechanics to be divided. combining OT [Typed] PROPORTIONS OF BRAKING. Y2540 Y2530 With further reference to H's memorandum… | ||
| Scan111 | Excessive front brake wear attributed to sand from the roads entering the drums. | ||
| View original record | Contd :- -6- GWH/Cra8.6.25. ---------------- of the brakes have been xxxx taken up, and these are being replaced along with the rear whilst the car is at Paris Depot. We believe that this excessive… | ||
| Scan112 | The condition of various vehicle components after testing. | ||
| View original record | R.R. 493A (50M) (D.B. 173 25-9-24) J.H.D. EXPERIMENTAL REPORT. -5- Expl. No. REF: GWH/Cms.6.25. SERVO & FITTINGS. These are all in a good condition. SPHERE. From outside examination this appears to be… | ||
| Scan113 | The condition of various vehicle components after 17,692 miles of testing. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -4- Exptl. No. REF GWH/Cms; 6. 25. ENGINE FABRIC COUPLING. This coupling after 17,692 miles, shows slight bulges between each anchorage.… | ||
| Scan114 | The condition of vehicle components including the axle, springs, and exhaust. | ||
| View original record | R.R. 493a (50m) (D.E. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF: GWHl/Crn/E125 We have replaced this by our old box, which was quite sound except for dowel flange which was broken.… | ||
| Scan115 | The condition and performance of various engine components after testing. | ||
| View original record | R.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF: GWML/Cm8.6.25. has slightly deteriorated, otherwise the drive is in a good condition. Since dismantling and cleaning… | ||
| Scan116 | The condition of chassis SS-NK after 21,139 miles, focusing on engine wear and component failures. | ||
| View original record | R.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF. GWH/Cm.8.6.25. To Hs! From G.W.Hancock. Report on chassis SS-NK after 21,139 miles: Engine: Engine power has been good and… | ||
| Scan117 | Observations and repairs on vehicle components. | ||
| View original record | R.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -5- Expl. No. REF GWA/Cm10.6.25. tube to frame having a standard 0.187" bolt fitted, whilst the hole in the tube was 0.200". At the… | ||
| Scan118 | The condition and wear of various vehicle components after testing. | ||
| View original record | EXPERIMENTAL REPORT. REF: GMN/Cra10.6.25. measurable wear on these gears. The servo mechanism is quite O.K. We believe that new cams are being sent out to lessen the tendency of fierce braking. PEDALS… | ||
| Scan119 | Issues and adjustments for front shock absorbers, clutch, and gearbox. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -3- Expl. No. REF: GWHI/Gml0:6:25. Front shock absorbers checked. Poundage of N.S. 22 - O.S. 15 lbs. These have been reset and made 22… | ||
| Scan120 | Issues and adjustments for various vehicle components including engine guards, steering, and axles. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -2- Expl. No. REF: GWH1/Crm10. 6. 25. up. Engine guards - as reported, these do not keep the engine clean on either side. On the exhaust… | ||
| Scan121 | The performance and condition of chassis 9-G-111 after completing 2,764 miles. | ||
| View original record | R.R. 493A (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: GWH/Cral10.6.25. COPY. To Ms. from G.W.Hancock. SECRET. REPORT ON CHASSIS 9-G-111 AFTER 2,764 MILES. ENGINE. Engine power… | ||
| Scan122 | Cover note for a report on chassis 9-G-111 after 2,764 miles. | ||
| View original record | To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DAJ BY. c. to Wor. ORIGINAL S E C R E T. Hs3/LG12.6.25 REPORT ON CHASSIS 9-G-111 AFTER 2,764 MILES. X5840 We attach a copy of a report we have received… | ||
| Scan123 | Cover memo for a report on chassis 93-NK after 21,139 miles, concerning a car running in France. | ||
| View original record | To Rj from Hs. c. to CJ. RJ. c. to RS. E. c. to DAJ BY. c. to Wor. 58940 ORIGINAL Hs9/LGM0.6.25 Report on chassis 93-NK after 21,139 miles. We attach copy of a report in connection with the above car… | ||
| Scan124 | Calculation for the torque multiplying units for an 'India' servo. | ||
| View original record | -2- ∴ one "output"/input unit = 1/.645 = 1.55 "torque multiplying units". For 'India' servo. Hs/Rm. | ||
| Scan126 | Tests carried out on gears and splines for 4-speed 20 HP gearboxes. | ||
| View original record | contd :- -2- Hs4/LG11.6.25. ------------ We are carrying out other tests on gears, which do not come out at present, by reducing the splines at the other end to see whether we can by this means make… | ||
| Scan127 | Modifications to the brakes, springs, and gearbox of an 'India' car. | ||
| View original record | R.R. 493a (50m) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. ORIGINAL Expl. No. REF: Hs4/LG11.6.25. To R. from Hs. c. to C.J. By. c. to Mac. Z. c. to DA. BY. c. to EW. SECRET! 'INDIA' BRAKES! X5940… | ||
| Scan128 | Chart and table detailing brake system distribution and efficiencies for various servo torque multiplications. | ||
| View original record | INDIA HS4 / LG 20525 AS MODIFIED BY N.SCH. 2005 & DAI / M 9625 DIAGRAM DATA: DRUM DIA. 13" .5 CAM 3.35" 2.25" 1.35 13.0" 4.35" 1.187 1.350 2.00 2.150 4.00 4.875 1.850" 3.150 6.00 DRUM DIA. 14" .43 CAM… | ||
| Scan129 | The condition of Eika Tungsten ignition points after a 15,583-mile test run. | ||
| View original record | To R. & E. from EFC. c. CJ. & FN. c. Ds. EV. Nor. c. EP. X.2894. EIKA TUNGSTEN POINTS. Further to our EFC4/T20.8.24, and finally as regards tungsten ignition contact breaker points (unless R.… | ||
| Scan131 | Chassis improvements, including front springs, front wheel brakes, and the gearbox. | ||
| View original record | SECRET. R4/M20. 6. 25. C. to [REDACTED] HS. TO [REDACTED] FROM R. INDIA. K5770 K5410 Y5310 HS. was here on Friday the 19th inst. with India. This is a chassis which has been improved since the one… | ||