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).
Test data for the permanent twist on a 1600 series propeller shaft.
| Identifier | ExFiles\Box 77\1\ scan0093 | |
| Date | 20th June 1911 | |
| R.R. 148 (20 H) (W 157. 24.1.11) G 1410. X484 1000 2600 Propeller shaft twist. 1600 Series. 20./6./11. Weight required to give shaft a permanent twist. 400 lbs at 40 inch radius. (This includes weight of pan and lever). Test carried out by Mr. Bailey. X633 RMG. eP{G. Eric Platford - Chief Quality Engineer} 20/6/11 | ||