From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Starter test report for a 1933 Bentley 'Bensport' car.
| Identifier | ExFiles\Box 62\1\ scan0220 | |
| Date | 27th November 1933 | |
| THE JOSEPH LUCAS RESEARCH LABORATORIES BIRMINGHAM, ENGLAND DATE 27th Nov: 1933. JLL/RB.{R. Bowen}W. REFRIGERATOR REPORT No. R.121. REF. 5/3. STARTER TEST B/13 MAKE OF CAR: Bentley "Bensport" MODEL: 4B IV YEAR: 1933. MILEAGE: - TYPE OF STARTER: R.R. Sch:399 TYPE OF BATTERY: Dagenite. No. OF FLYWHEEL TEETH: 119 No. OF PINION TEETH: 13 STARTER GEAR RATIO: 9.154:1. No. OF CYLINDERS: 6 BORE: 3.25" STROKE: 4.5" CAPACITY: 3669 COMPRESSION RATIO: 7¼ (approx) No. CRANKSHAFT BEARINGS: 7 MAKE OF CARBURETTER: S.U. (2) GRADE OF PETROL: - GEARBOX LUBRICANT: Mobiloil D.{John DeLooze - Company Secretary} TABLE DATA: DATE AND TIME: 24.11.33. 10.10 am GRADE OF OIL: Mobiloil D.{John DeLooze - Company Secretary} TEMPERATURE °C.: OIL: - AIR: -2.5°C BATTERY: - CLUTCH: IN STARTER: AMPS.: 292/306 VOLTS.: 6.4/6.1 BATTERY: VOLTS.: 7.9/8.3 SP.{Mr Spinney} GR.{George Ratcliffe}: - R.P.M.: STARTER: 366 ENGINE: 40 *TORQUE (Lbs.Ft.): STARTER: 7.84 ENGINE: 71.8 REMARKS In deducing the torque figures a 75% gear efficiency is assumed. A spring balance on the starting handle before the cranking tests gave the following results:- On compression 35 lbs. at 7.125" radius. Off " 30 lbs. at 7.125" radius. Rolls Royce Calibration Curve Ref: L.B. 4.7.33. *TORQUE DEDUCED FROM CALIBRATION CURVE NO. | ||