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).
Test log sheet detailing performance metrics for various motor designs, including brake torque, current, and speed.
| Identifier | ExFiles\Box 70\4\ scan0163 | |
| Date | 4th September 1929 | |
| -2- | Date | Motor design | (8) Brake torque > 20 lb-inches. | Current 13 to 15 amperes. | (9) Brake torque < 900 lb-ins | Speed | (10) Remarks | (11) Remarks | (12) Torque lb-ins 50-250 | (13) Remarks | |----------|--------------|------------------------------------|-----------------------------|-------------------------------|-------------|-------------------------|--------------|---------------------------|--------------| | 12.7.29 | WJ.45 | 22.5 | 13.0 | 980 | 896 | OK Noise moderate | - | 154.5 | OK | | 12.7.29 | VK.85 | 22.5 | 13.5 | 984 | 960 | OK Fair noise | - | 156 | OK | | 12.7.29 | WJ.55 | 39.0 | 13.0 | 1017 | 976 | OK Noise moderate | - | 198 | OK | | 13.7.29 | WJ.75 | 33.7 | 13.5 | 996 | 896 | OK Noise moderate | - | 121.5 | OK | | 13.7.29 | WJ.85 | 21.0 | 13.0 | 924 | 960 | OK Noise slight | - | 183 | OK | | 15.7.29 | WJ.65 | 21.75 | 12.75 | 984 | 960 | OK Noise moderate | - | 205.5 | OK | | 16.7.29 | FA.15 | 32.2 | 13.25 | 951 | 960 | OK Fairly quiet | - | 164 | OK | | 16.7.29 | FA.25 | 36.8 | 13.0 | 1015 | 930 varies | Some jams Medium noise. | - | 154.5 | OK | = 4.9.29. | ||