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 EAC G.2 motor armature at crawling speed.
| Identifier | ExFiles\Box 64\1\ scan0229 | |
| Date | 21th September 1925 | |
| MOTOR FORM 3. TORQUE TEST OF MOTOR armature (at given speeds) Date :- No:- Motor under test :- EAC. G.2 Speed:- Crawling (Main) Epicyclic Reduction gear ratio :- 96 to 31 Dia. of brake wheel:- 24" Weight of pan and portion of rope:- 5 lbs. 0 ozs. Table Data: Column Headers: 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). Row 1: 12, 6 3, 123.0, 1.90, 1.15, 3.05, .0154, -, -, 5.812, 10.812, 129.7 Row 2: 10, 5 5, 110.0, 1.70, 1.07, 2.77, .0154, -, -, 4.684, 9.684, 116.2 Row 3: 8, 4 11, 99.0, 1.55, .98, 2.53, .0157, -, -, 3.312, 8.312, 99.8 Row 4: 6, 4 3, 84.0, 1.30, .86, 2.16, .0155, -, -, 1.182, 6.182, 74.3 Row 5: 4, 3 5, 72.0, 1.10, .80, 1.90, .0153, -, -, .684, 5.684, 68.2 Row 6: 2, 2 6, 58.0, .90, .63, 1.53, .0155, -, -, -.375, 4.625, 55.5 Row 7: 0, 1 12, 49.0, .75, .58, 1.33, .0153, -, -, -1.750, 3.250, 39.0 Row 8: 0, 0 0, 13, .21, .19, .40, .0162, -, -, , , 0 21.9.25. | ||