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).
Remarks regarding the silence of operation, noting noisy bearings.
| Identifier | ExFiles\Box 40\2\ Scan072 | |
| Date | 11th January 1926 guessed | |
| -6- (16) Remarks re silence of operation:- Noisy bearings, otherwise quiet in operation. EFC. | ||