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 GWH to Mr. Hives regarding testing on a diaphragm in hot spot throttles.
| Identifier | ExFiles\Box 50\3\ Scan261 | |
| Date | 23th March 1923 | |
| Mr. Hives. from GWH. {George W. Hancock - Head Chateauroux} X4305 23.3.23. HOT SPOT THROTTLES. Petrol leaking out after shutting down due to leaving diaphragm out of throttle piston. Diaphragm spun into throttle piston. We have caused back-fires in carburetter to determine whether diaphragm would hold in its position. After approx. 20 hrs. with an average of a back-fire every 2 mins., the diaphragm is quite O.K. GWH. {George W. Hancock - Head Chateauroux} | ||