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).
Issues with the Phantom engine, including run-on after switch-off, cooling system tests, detonation and fuel system comparisons.
Identifier | ExFiles\Box 69\3\ scan0357 | |
Date | 9th December 1925 | |
R.R. 493A (50 H) (D.D. 31. 12-6-25) J.H.D. 48770 EXPERIMENTAL REPORT. Expl. No. REF Hs{Lord Ernest Hives - Chair}7/LG9.12.25. To OY. from Hs.{Lord Ernest Hives - Chair} PHANTOM ENGINE. As regards your trouble with the engine going on firing after being switched off. We have investigated this complaint here and it does not occur on any of our cars. We agree that if you run full power and switch off with the throttle open, there will be one or two kicks - the same thing occurs on the Silver Ghost engine. We have also carried out special tests actually on the Phantom engine by taking the water outlet (both at the rear and the front) out of the engine. We cannot appreciate that this is the least advantage. On the present standard engine we can measure a difference of 3°C in the temperature of the water - the rear end of the engine is that amount cooler than the front end which has the outlet to the radiator. We cannot confirm your experience as regards detonation being affected by the valve in the exhaust pipe. Thank you for your cable as regards using the Stewart Tank in place of the Autovac. We have tried a Stewart tank and find that it is undoubtedly better than the Autovac. We cannot see any obvious reason for this. We are trying another Stewart tank to see if we can find why this is so. Clutch pedal pressure. We are rather tied contd :- | ||