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 112 | |
| Date | 7th March 1922 | |
| MOTOR FORM 5. Brushes 7° advance 6 X.3009 - BRAKE TEST OF STARTER MOTOR. Date:- 7.3.22 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:- Load in pan. (lbs), Spring balance reading. (lbs. ozs.), Speed R.P.M., Amps., Volts., W-S (lbs), T - Torque (lbs), t (lb-ins), B.H.P., E.H.P., Efficiency. 12, 1 9, 560, 168.0, 8.64, 10 7, 15.31, 76.6, .68, 1.95, .349 10, 1 11, 712, 152.0, 8.96, 8 5, 13.19, 66.0, .75, 1.82, .412 8, 1 12, 888, 133.0, 9.34, 6 4, 11.13, 55.7, .79, 1.67, .473 6, 1 7, 1050, 119.0, 9.62, 4 9, 9.44, 47.2, .79, 1.53, .516 4, 1 9, 1300, 99.0, 10.02, 2 7, 7.31, 36.6, .76, 1.33, .572 2, 1 5, 1550, 84.0, 10.32, 1 1, 5.56, 27.8, .68, 1.16, .587 0, 1 1, 1888, 68.0, 10.64, -1 1, 3.81, 19.1, .57, .97, .588 22.2.22. | ||