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 a motor at given speeds.
| Identifier | ExFiles\Box 64\1\ scan0232 | |
| Date | 8th July 1926 | |
| MOTOR FORM 3. TORQUE TEST OF MOTOR. (at given speeds) armature Date:- 3.9.8-7-26 Motor under test :- EAC. G.2 Armature Speed:- 1500 rpm. No:- Epicyclic Reduction gear ratio:- 96 to 31 Dia. of brake wheel:- 24" Weight of pan and portion of rope 5 lbs. 0 ozs. Brake Table Data: Load in pan (lbs) (W) | Spring balance reading. (S) lbs. | Spring balance reading. (S) ozs. | Amperes. | Field Volts. | Arm. Volts. | Total Volts. | Field ohms. | Arm. ohms. | W-S (lbs) | T-t (lbs) | Torque (lb-inches) | Total ohms. 7 | 1 | 7.5 | 125.5 | 2.13 | 10.5 | 12.63 | .0170 | - | 5.531 | 10.531 | 126.3 | - 5 | 1 | 0 | 110.7 | 1.82 | 10.07 | 11.89 | .0164 | - | 4.000 | 9.000 | 108.0 | - 3 | 0 | 12 | 94.5 | 1.53 | 9.60 | 11.13 | .0162 | - | 2.250 | 7.250 | 87.0 | - 1 | 0 | 8 | 79.2 | 1.28 | 9.20 | 10.48 | .0162 | - | .50 | 5.500 | 66.0 | - 0 | 0 | 7 | 70.4 | 1.15 | 8.85 | 10.00 | .0164 | - | -.437 | 4.563 | 54.8 | - 0 | 0 | 0 | 23.0 | .375 | 5.37 | 5.75 | .0163 | - | - | - | 0 | - (In the last row, in the Torque column, there is a handwritten 'Y') 10.9.25. | ||