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).
Characteristic curve graph for a Westinghouse starting motor, frame 54 C6.
| Identifier | ExFiles\Box 23\2\ Scan066 | |
| Date | 1st June 1921 | |
| Westinghouse Starting Motor Frame 54 C6 Perf Spec 5.O.D Characteristic Curve TB 2999 PAI E.S. 1/2 F83846 P55 Dec 1/38 1-6-21 Curve 102163 X.1086 AXES: R.P.M Volts & Torque lbs ft Amperes Horse Power Efficiency % CURVES: Locked Torque Running Volts Speed Locked Volts % Running Torque H.P. Output Efficiency | ||