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 results for a standard motor under cold and hot conditions, showing speed, voltage, amperage, and temperature readings.
| Identifier | ExFiles\Box 50\2\ Scan097 | |
| Date | 11th August 1930 | |
| -2- Contd. STANDARD MOTOR. (COLD) Test. | Speed of engine (R.P.M.) | Motor Speed. | Volts. | Amps. | Temp. of Cyl: | Temp. of radiator. | Remarks. 1 | 50 | 1165 | 10.65 | 82 | 19.5°C | 19.5°C | Volts taken across battery terminals. 2 | 58 | 1350 | 10.63 | 82 | " | " | " 3 | 64 | 1490 | 10.59 | 82 | " | " | " Motor volts would be about 9.9 Motor torque (chain wheel) 30. Engine torque 630 lb-inches. (HOT). 1 | 100 | 2330 | 11.71 | 62.0 | 72°C | 88°C | Volts taken across battery terminals. 2 | 100 | 2330 | 11.65 | 60.0 | 80°C | 90°C | " 3 | 100 | 2330 | 11.55 | 60.8 | 80°C | 90°C | " Motor volts would be about 11.1. Motor torque (chain wheel value) = 18 lb-inches. Engine torque 378 lb-inches. Contd. R R 266A (100) (T.S) 11-8-30. H S L (CO) 2800 G | ||