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 report for an E.A.C. G2 motor armature at crawling speed.
Identifier | ExFiles\Box 64\1\ scan0228 | |
Date | 9th July 1926 | |
MOTOR FORM 3. TORQUE TEST OF MOTOR armature (at given speeds) Date:- 9-7-26 Motor under test :- E.A.C. G 2. Armature Speed:- Crawling (Main) No:- Epicyclic Reduction gear ratio:- 96 to 31. Dia. of brake wheel:- 24" Weight of pan and portion of rope:- 5 lbs. 0 ozs. 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) | Brake Torque (lb-inches) 28 | 12 0 | 204.0 | 3.30 | 1.80 | 5.10 | 0.0162 | - | - | 16.00 | 21.00 | 252.0 26 | 11 10 | 196.0 | 3.15 | 1.80 | 4.95 | 0.0161 | - | - | 14.375 | 19.375 | 232.5 24 | 10 10 | 176.0 | 3.10 | 1.60 | 4.70 | 0.0176 | - | - | 13.375 | 18.375 | 220.5 22 | 10 2 | 164.0 | 2.73 | 1.50 | 4.23 | 0.0166 | - | - | 11.875 | 16.875 | 202.5 20 | 9 6 | 156.0 | 2.65 | 1.50 | 4.15 | 0.0170 | - | - | 10.625 | 15.625 | 187.5 18 | 8 8 | 148.0 | 2.50 | 1.50 | 4.00 | 0.0169 | - | - | 9.500 | 14.50 | 174.0 16 | 7 11 | 136.0 | 2.20 | 1.40 | 3.60 | 0.0162 | - | - | 8.310 | 13.31 | 159.7 14 | 6 6 | 129.0 | 2.10 | 1.25 | 3.35 | 0.0163 | - | - | 7.625 | 12.625 | 151.5 20.8.25. | ||