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).
Page 3 of a report describing a severe test on a comparatively cool piston.
| Identifier | ExFiles\Box 37\4\ scan 151 | |
| Date | 14th May 1917 guessed | |
| Contd. 3. This ought to have been a severe test because the full power would be switched on to a comparatively cool piston. EH. | ||