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).
Alterations to the carburetter's float chamber and air valves to adjust for changes in depression.
| Identifier | ExFiles\Box 90a\1\ Scan021 | |
| Date | 15th March 1939 | |
| -2- Rm{William Robotham - Chief Engineer}/CTC.10/JH-15.3.39. Float chamber and the under side of the air valves, to be connected to the forward intake at the point where it is joined to the carburetters. These alterations are necessary because the effective depression which lifts the air valves is reduced when the forward intake is used. At the same time and for the same reason, the depression over the jet is reduced. Graph T.78 shows the required ignition characteristic and the power lost in avoiding detonation. Rm{William Robotham - Chief Engineer}/CTC. | ||