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).
Notes on magneto operation silence and tangential force measurements.
| Identifier | ExFiles\Box 65\3\ scan0081 | |
| Date | 5th September 1927 guessed | |
| -7- (16) Remarks re silence of operation. Very quiet magneto. (17) Tangential force = 1 1/2 lbs wt. EFC. | ||