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 results for an RR. Goshawk starter motor.
| Identifier | ExFiles\Box 35\4\ scan 105 | |
| Date | 27th February 1922 | |
| MOTOR FORM 5. 4 X. 3009 - BRAKE TEST OF STARTER MOTOR. Date:- 27.2.22. Motor under test:- RR. Goshawk. Dia. of brake wheel:) 10" No:- 4 Weight of pan and portion of rope = 4 lbs. 7 1/2 ozs. Reduction gear ratio:- -- No: 22 Table data: Headers: Load in pan (W), Spring balance reading (S) lbs. ozs., Speed R.P.M., Amps., Volts., W-S (lbs), T-t (lbs), Torque (lb-ins), B.H.P., E.H.P., Efficiency. Row 1: 12, 14 ozs, 520, 171.0, 8.58, 11 lbs 2 ozs, 16.0, 80.0, .66, 1.97, .335 Row 2: 10, 1 lbs 4 ozs, 680, 154.0, 8.92, 8 lbs 12 ozs, 13.63, 68.2, .74, 1.84, .402 Row 3: 8, 1 lbs 10 ozs, 876, 134.0, 9.32, 6 lbs 6 ozs, 11.25, 56.3, .78, 1.67, .467 Row 4: 6, 1 lbs 5 ozs, 1040, 120.0, 9.60, 4 lbs 11 ozs, 9.56, 47.8, .79, 1.54, .513 Row 5: 4, 1 lbs 2 ozs, 1270, 103.0, 9.94, 2 lbs 14 ozs, 7.75, 38.8, .78, 1.37, .569 Row 6: 2, 14 ozs, 1524, 87.0, 10.26, 1 lbs 2 ozs, 6.0, 30.0, .73, 1.20, .608 Row 7: 0, 11 ozs, 1892, 70.0, 10.60, -11 ozs, 4.19, 21.0, .63, 1.00, .630 Brushes 70 advanced 22.2.22. | ||