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 on operational noise from components like gears, bearings, and magnetos, with suggestions for reduction.
| Identifier | ExFiles\Box 48\2\ Scan341 | |
| Date | 14th December 1925 guessed | |
| -6- (16) Remarks re silence of operation:- Sleeve noise reduced, Gears noisy especially at about 1200 rpm. Bearings hum at high speeds. Contact breaker noisy. General noise of these magnetos could possibly be reduced by enclosing the armature tunnel more rigidly in a solid casting. EFC. {E. Fowler Clarke - Electrical Engineer} | ||