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).
Graph of starter motor test curves comparing R.R. and Lucas motors for a Standard Bentley.
| Identifier | ExFiles\Box 142\3\ scan0356 | |
| Date | 1st September 1937 | |
| STARTER MOTOR TEST CURVES MOTOR TYPE:- STANDARD BENTLEY PINION TO FLYWHEEL RATIO - 8 44:1 MOTOR GEARING ARMATURE TO PINION 1.9:1 LUCAS TYPE N No. M.45.G PINION TO FLYWHEEL RATIO 16.44:1 VOLT AMPERE SCHEDULE V = 12 - A/60 CURVES OF R.R. MOTOR SHOWN THUS CURVES OF LUCAS MOTOR SHOWN THUS AMPERES B.H.P. EFFICIENCY VOLTS R.P.M. Y-AXES: EFFICIENCY % VOLTAGE AMPERES B.H.P. MOTOR ARMATURE SPEED (R.P.M.) X-AXIS: TORQUE (POUND INCHES) C-9-37 EL1 M/L BRITISH MADE | ||