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).
Graph comparing load versus deflection for a standard and a lightened 25 HP clutch.
| Identifier | WestWitteringFiles\V\December1930-February1931\ Scan132 | |
| Date | 14th January 1931 guessed | |
| LOST MOVEMENT 25 HP CLUTCH ANGULAR MOVEMENT OF CLUTCH OPERATING SHAFT WITH CLUTCH SPRINGS CHOC O' BLOCK DEFLECTION IN 1000'S AT 3.62" RAD. LOAD IN LBS. AT 3.2" RAD. STANDARD 25 HP CLUTCH G.33692 LIGHTENED CLUTCH ALUMINIUM BACK PLATE STIFFENED & STIFFER FINGERS G.34385 TO CONVERT TO LBS. PEDAL PRESSURE MULTIPLY BY .108 | ||