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 the silence of operation and a tangential force measurement.
| Identifier | ExFiles\Box 40\2\ Scan126 | |
| Date | 10th August 1926 guessed | |
| -6- (16) Remarks re silence of operation :- Very quiet in operation practically noiseless at low speeds. (17) Tangential force = 1.5 lbs wt. | ||