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).
Drawing showing a modification to an induction pipe for a 25/30 HP engine.
| Identifier | ExFiles\Box 20\9\ Scan097 | |
| Date | 22th January 1936 guessed | |
| RM{William Robotham - Chief Engineer} 47 THE ONLY MOD. TO Ex 21111 IS THAT THE SLOPE OF THIS FLOOR IS CARRIED INTO THE MAIN BORE OF INDN. PIPE BY THE CHANNEL SHOWN. .500 MOD TO INDN. PIPE FOR 25/30 HO ENGINE - RM{William Robotham - Chief Engineer} 47 | ||