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).
Torque test results for an R.R. Goshawk motor at 1500 r.p.m.
| Identifier | ExFiles\Box 35\4\ scan 096 | |
| Date | 1st February 1922 | |
| MOTOR FORM 3. TORQUE TEST OF MOTOR (at given speed); Date: - 1.2.22 Motor under test: - R.R. Goshawk Speed 1500 r.p.m. No: - 1 Reduction gear ratio:- Weight of pan and portion of rope: - 5 lbs. 0 ozs. Table Data: Load in pan (lbs) (W). | Spring balance reading (S) lbs. ozs. | Amperes. | Field volts. | Arm: volts. | Total volts. | Field ohms. | Arm: ohms. | Total ohms. | W-S (lbs) | T-t (lbs) | Torque lb-ins 7 | 1 12 | 124.0 | .850 | 12.73 | 13.58 | .00685 | | | 5 4 | 10.25 | 51.25 6 | 1 9 | 115.0 | .790 | 12.30 | 13.09 | .00687 | | | 4 7 | 9.44 | 47.20 5 | 1 7 | 110.5 | .750 | 11.90 | 12.65 | .00679 | | | 3 9 | 8.56 | 42.80 4 | 1 7 | 99.0 | .660 | 11.30 | 11.96 | .00667 | | | 2 9 | 7.56 | 37.80 3 | 1 10 | 88.5 | .571 | 10.70 | 11.27 | .00646 | | | 1 6 | 6.38 | 31.90 2 | 1 9 | 78.8 | .512 | 10.33 | 10.84 | .00650 | | | 7 | 5.44 | 27.20 1 | 1 4 | 72.3 | .475 | 9.83 | 10.31 | .00658 | | | -4 | 4.75 | 23.75 0 | 1 3 | 62.5 | .416 | 9.05 | 9.47 | .00666 | | | -1 3 | 3.81 | 19.05 0 | 0 | 13.5 | .090 | 2.75 | 2.84 | .00666 | | | 0 0 | 0 | 0 | ||