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).
Requirement and methods for exhaust heating the carburettor's induction pipe on the Phantom II.
| Identifier | ExFiles\Box 13\3\ 03-page109 | |
| Date | 4th October 1929 | |
| Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} c. Sg.{Arthur F. Sidgreaves - MD} By.{R.W. Bailey - Chief Engineer} Oy. X7080 R3/M4.10.29. X7910 X7238 PHANTOM II. INDUCTION PIPE HEATING. With reference to the requirement of exhaust heating for the carburetter on Phantom II, the following appears to be the situation :- (1) The change in the shape of the exhaust pipe, weir type, and the 6 openings into the head, were understood to considerably improve the cold distribution, and therefore demanded less heat under all circumstances, compared with the original Phantom, and Silver Ghost. (2) Now that we use shutters universally the air under the bonnet, both in summer and winter, is approximately the same temperature, so compared with the Silver Ghost days, we have definitely heated the ingoing air. (3) Since one fears that be neglect to handle shutters efficiently may be a common fault, leading to dissatisfaction we are sending a design for thermostatically controlled shutters. (4) We have already sent you suggestions for exhaust heat from the cyl. head which was found to have insufficient circulation. We then sent you, in July 1928, a scheme for India Lec.2573 - of an asbestos covered pipe passing through the cylinder block. In earlier suggestions we sent you a scheme for superheating the water, and there is also the suggestion of additional water heat up to the weir bend. (5) I am prepared to believe that previous experience will prejudice us in favour of exhaust heating, but any unnecessary heat is bad, and we already have more than aero engines. I very definitely against returning to a valve in the exhaust pipe. We are sending another scheme of heated exhaust gas, good enough for temporary use. R.{Sir Henry Royce} | ||