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).
Comparison table of Rolls-Royce and Westinghouse starting motors.
| Identifier | ExFiles\Box 23\2\ Scan092 | |
| Date | 10th December 1930 guessed | |
| COMPARISON OF ROLLS-ROYCE AND WESTINGHOUSE STARTING MOTORS. Torque / @ 1 ft. R.P.M. WEST. R.R. % Increase. EFFICIENCY. WEST. R.R. AMPERES. WEST. R.R. HORSE POWER. WEST. R.R. % INCREASE 1 3900 2740 40 58 52.5 82 54 .64 .48 33.5 2 2780 1990 40 63 61.5 120 78 1.08 .74 46. 3 2310 1590 45 63.7 63.5 149 97 1.33 .91 46. 4 1960 1350 45 63.5 62.8 173 111 1.52 1.08 40.5 5 1430 1050 36 61.5 56.5 221 140 1.68 1.22 38. 8 1050 850 23.5 57. 48.5 269 168 1.69 1.32 28. 10 780 670 16. 50. 40. 318 196 1.56 1.31 19. TEMPERATURE 80° F AUTOMOTIVE ENGINEERING DEPT. R.G. THOMPSON, ENGINEER, Sgd. | ||