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 characteristics of a starter motor versus torque.
| Identifier | WestWitteringFiles\T\2July1929-December1929\ Scan029 | |
| Date | 25th July 1929 guessed | |
| STARTER MOTOR BRAKE EFFICIENCY X.3082 R.R. EXPL MOTOR X. 3009 APPROX. WORKING POINT ON 40/50 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 NOTE: (ASSUMING EPICYCLIC GEAR ON MOTOR TO BE 100% EFFICIENT.) | ||