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 Goshawk starter motor.
| Identifier | ExFiles\Box 35\4\ scan 114 | |
| Date | 11th March 1922 | |
| MOTOR FORM 5. X.3009 - BRAKE TEST OF STARTER MOTOR. 6 Date:- 11.3.22. Motor under test:- R.R. Goshawk Dia. of brake wheel:- 10" No:- 6 Weight of pan and portion of rope 4 lbs. 14 ozs. Reduction gear ratio:- — Table of test results: Headers: [Condition], Load in pan.(W), Spring balance reading.(S) (lbs. ozs.), Speed R.P.M., Amps., Volts., W-S (lbs), t (lbs), Torque (lb-ins), B.H.P., E.H.P., Efficiency. Row 1: 7° Advanced | 7 | 1 : 6 | 925 | 130.0 | 9.40 | 5 : 10 | 10.5 | 52.5 | [empty] | [empty] | 4° advanced from std Row 2: 5° advanced | 7 | 1 : 9 | 958 | 124.0 | 9.52 | 5 : 7 | 10.31 | 51.6 | [empty] | [empty] | 2° advanced from std Row 3: 3° advanced | 7 | 1 : 2 | 933 | 128.0 | 9.44 | 5 : 14 | 10.75 | 53.85 | [empty] | [empty] | Now standard position 22.2.22. | ||