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 of horse power vs RPM required to rotate a Lorraine-Dietrich engine.
| Identifier | ExFiles\Box 5a\5\ 05-page029 | |
| Date | 29th March 1911 | |
| 412 LORRAINE - DIETRICH ENGINE POWER NECESSARY TO ROTATE ENGINE HORSE POWER 25, 20, 15, 10, 5, 0 R.P.M. OF ENGINE 500, 1000, 1500, 2000, 2500, 3000 LORRAINE 20HP R.R. REQUIRED POWER FOR LORRAINE LORRAINE 20HP R.R. | ||