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).
Operational noise, noting issues with unevenly meshing gears and sleeve noise.
| Identifier | ExFiles\Box 48\2\ Scan261 | |
| Date | 26th March 1925 guessed | |
| -6- (16) Remarks re silence of operation:- Gears meshing unevenly, and slight noise caused by the sleeves, otherwise fairly quiet. EFC. {E. Fowler Clarke - Electrical Engineer} | ||