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).
From Mr Royce regarding the specification for the coupling shaft on new engine dynamometers.
| Identifier | ExFiles\Box 74\4\ scan0129 | |
| Date | 23th April 1912 | |
| 161 X380 Re new engine dynamometers. Mr Whitehead. 23.4.12. TBB1/L23412. Will you please note that Mr Royce wishes the coupling shaft between the test engine and the dynamo to be fitted with the frictionally damped spring drive recently devised for our standard clutch coupling. Whiteheads file | ||