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).
Brake test report for a Standard Goshawk starter motor.
| Identifier | ExFiles\Box 35\4\ scan 138 | |
| Date | 26th April 1923 | |
| MOTOR FORM 5. X 4354 X.3009 - BRAKE TEST OF STARTER MOTOR. X.4384 Date:- 26.4.23. Motor under test:- Std. Goshawk. Dia. of brake wheel:- 10" No.:- Weight of pan and portion of Rope - lbs. ozs. Reduction gear ratio:- 1 Load in pan (T) Spring balance reading (S) lbs. ozs. Speed R.P.M. Amps. Volts. W-S (lbs). T - t (lbs). Torque (lb-inches) B.H.P. E.H.P. Efficiency 1840 | 61.7 | 10.76 | 20.0 | .58 | .89 | .652 1466 | 79.6 | 10.41 | 30.0 | .70 | 1.11 | .630 1206 | 96.5 | 10.07 | 40.0 | .77 | 1.30 | .592 995 | 113.2| 9.73 | 50.0 | .79 | 1.48 | .534 820 | 130.8| 9.39 | 60.0 | .78 | 1.65 | .473 676 | 147.7| 9.05 | 70.0 | .75 | 1.79 | .419 555 | 165.0| 8.70 | 80.0 | .70 | 1.92 | .365 456 | 180.0| 8.40 | 89.0 | .64 | 2.03 | .315 22. 2.22. | ||