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).
Diagram illustrating an improved fluid drive transmission mechanism.
| Identifier | ExFiles\Box 147\4\ scan0157 | |
| Date | 13th January 1941 guessed | |
| IMPROVED FLUID DRIVE TRANSMISSION MECHANISM. ROTOR DRIVE SHAFT DRIVEN SHAFT SECTION of ROTOR. always 2 to 1 axle twice ratio now used 1077 570 1200 200 | ||