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).
Photographic study of flywheel vibration patterns at various speeds and configurations.
| Identifier | ExFiles\Box 137\4\ scan0203 | |
| Date | 11th February 1931 guessed | |
| STANDARD FLYWHEEL DOUBLE BEARING A 2700 3000 3400 3550 W.W. FLYWHEEL DOUBLE BEARING B 3100 3400 3600 3700 STANDARD FLYWHEEL UNDER STANDARD CONDITIONS C STATIONARY 2500 2600 THIS IS ALSO MAGNITUDE OF WHIRL UP TO 2600 FOR A UP TO 3000 " " B UP TO 2300 " " C 2800 3200 -> | ||