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).
Graph showing the results of 25 HP servo tests under various loading conditions.
| Identifier | ExFiles\Box 102\3\ scan0069 | |
| Date | 26th July 1933 guessed | |
| 25 H.P SERVO TESTS. ① PROGRESSIVE LOADING FRONT ② SNATCH LOADING (HOT) FRONT ③ SNATCH LOADING (COLD) FRONT ④ PROGRESSIVE LOADING REAR ⑤ SNATCH READINGS (HOT) REAR ⑥ SNATCH READINGS (COLD) REAR OUTPUT - lbs INPUT - lbs | ||