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).
Performance graph showing the brake efficiency, power, speed, voltage, and current curves for a starter motor.
| Identifier | ExFiles\Box 51\5\ Scan079 | |
| Date | 25th April 1922 guessed | |
| STARTER MOTOR BRAKE EFFICIENCY X4342L LUCAS STARTER MOTOR APPROX WORKING POINT ON GOSHAWK CHASSIS AXIS LABELS: ELECTRICAL H.P EFFICIENCY VOLTAGE AMPERES B.H.P. R.P.M. TORQUE ( POUND INCHES ) CURVE LABELS: EFFICIENCY VOLTS B.H.P AMPERES E.H.P SPEED | ||