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).
Table of performance data showing Amps, Volts, Horsepower, and Efficiency.
| Identifier | ExFiles\Box 61b\3\ scan0022 | |
| Date | 7th April 1915 | |
| -/ EH 4/2812/4. APR 7 '15 X. 3475 -602 x583 Amps. Volts. Electrical HP. Brake HP. Efficiency. 2470. 35. 11.4 .53 .15 28% 2365. 37. 11.4 .56 .2 35% 2200. 40. 11.4 .61 .25 41% 2100. 42. 11.3 .63 .285 45% 1975. 45. 11.3 .68 .3 44% 1940. 46. 11.3 .73 .32 44% 1860. 48. 11.3 .73 .32 44% 1800. 50. 11.2 .75 .34 45% 1740. 51. 11.1 .755 .35 47% 1680. 53. 11.1 .78 .38 48% 1630. 54. 11.0 .79 .39 49% 1595. 56. 11.0 .82 .41 50% 1550. 58. 10.9 .84 .43 51% 1470. 62. 10.9 .89 .45 51% 1390. 65. 10.8 .94 .48 51% 1325. 66. 10.7 .95 .50 52.5% 1250. 73. 10.7 .95 .52 55% 1150. 78. 10.5 1.1 .52 52% 1100. 80. 10.5 1.1 .53 52% 1040. 83. 10.3 1.1 .53 52% 990. 85. 10.2 1.2 .54 55% 920. 92. 10.2 1.25 .55 54% 790. 99. 10.0 1.32 ? .54 52% 660. 106. 9.7 1.38 .51 49% 635. 107. 9.6 1.38 .50 48% 485. 118. 9.3 1.45 .45 43% R.R. 235A (150 H) (S.A. 44. S-12-14) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 0855. | ||