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).
Modification to the exhaust heating system on the New Phantom model.
| Identifier | ExFiles\Box 66\2\ scan0074 | |
| Date | 4th September 1925 | |
| To Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} c. to CJ. c. to BY.{R.W. Bailey - Chief Engineer} 48230 RL/M4.9.25. NEW PHANTOMCodename for PHANTOM I - EXHAUST HEATING. X. 8230 X. 8080 With regard to doing away with the exhaust heat on the Phantom throttle, would it be possible to get rid of the exhaust valve by re-arranging the pipes so as to give a natural draught sufficient to maintain the heat - that is - we do not mind if the circulation is rather slow with low power, because not much heat will be needed, but when we have a lot of petrol passing the circulation should be fairly vigorous. We are hoping that in the event of you preferring the exhaust heated scheme that we shall still be able to cancel the valve in the exhaust pipe by carefully arranging the pipes so as to get an ejector effect upon the exhaust, to make sufficient heat pass the throttle valve bend. MADE AT CROXLEY R.{Sir Henry Royce} | ||