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).
Dynamometer power test results for a Mercedes engine, including handwritten notes.
| Identifier | ExFiles\Box 22\5\ Scan066 | |
| Date | 16th December 1910 | |
| X407 Mercedes - Power on Dynamometer Speed. | 500 | 750 | 1000 | 1250 | 1500 | 1750 | 2000 H P | 8.1 | 12.2 | 16.3 | 20.4 | 24.3 | 28 | 24.6 contension | 76 | 76 | 76 | 76 | 76 | 74 | 74 Vibrations caused needle to vibrate no difference in power measurable cut out on or closed. Max. torque 500 to 1750 - 29.5 HP exh. free to air Taken by brake on dyn. 16/12/10 Car ran very well - but had gear knock in engine, & clutch rattled (? slip on overrun) CP 16/12/10 | ||