Blueprint graph showing starter motor brake efficiency for a Lucas starter motor on a Goshawk chassis.
| Identifier | WestWitteringFiles\H\January1922\ Scan36 | |
| Date | 5th January 1922 guessed | |
| STARTER MOTOR BRAKE EFFICIENCY X.4342L. LUCAS STARTER MOTOR APPROX WORKING POINT ON GOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) CHASSIS ELECTRICAL H.P. EFFICIENCY VOLTAGE AMPERES B.H.P. R.P.M TORQUE (POUND INCHES) VOLTS EFFICIENCY B.H.P. AMPERES E.H.P. SPEED | ||
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).