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 comparing the Brake Horsepower and Efficiency curves of a starter motor against torque.
| Identifier | ExFiles\Box 34\3\ Scan140 | |
| Date | 22th March 1913 | |
| STARTER MOTOR BRAKE EFFICIENCY ELECTRICAL H.P. EFFICIENCY. VOLTAGE. AMPERES B.H.P R.P.M. TORQUE (POUND INCHES.) LUCAS A V R R 45 B.H.P. EFFICIENCIES B.H.P. B.H.P. COMPARISON OF B.H.P AND EFFICIENCY CURVES. STAMP: ROLLS-ROYCE LIMITED 22 MAR 1913 | ||