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).
Series of five photographs showing the distortion of a rotating object at various speeds.
| Identifier | ExFiles\Box 137\4\ scan0150 | |
| Date | 24th December 1930 guessed | |
| IV G STATIONARY 2500 2600 2800 3200+ | ||