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 characteristic graph for a starter motor, plotting various metrics against torque.
| Identifier | ExFiles\Box 64\1\ scan0302 | |
| Date | 29th August 1928 guessed | |
| STARTER MOTOR BRAKE EFFICIENCY Oldham 4309 C.2. SPEED AMPERES VOLTS E.H.P B.H.P EFFcy ELECTRICAL H.P EFFICIENCY VOLTAGE AMPERES B.H.P R.P.M TORQUE (POUND INCHES) R.R. SEQUENCE STARTER MOTOR C.2. Two SERIES - Two PARALLEL FIELD. | ||