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).
Proposal to experiment with a new induction system to reduce engine detonation, including a diagram.
| Identifier | WestWitteringFiles\T\2January1929-June1929\ Scan054 | |
| Date | 21th January 1929 guessed | |
| -8- Contd. This would in some ways appear preferable to the present Phantom hot spot system in which the mixture in the induction pipe receives the most heat when the engine is idling or running at small throttle opening on the road. Under these conditions it needs the least amount of heat due to the small quantity of mixture and high induction pipe depression. We think this high charge temp. when running on small throttle opening may to some degree aggravate the tendency to detonate experienced when opening up, suddenly from low speeds. This detonating tendency was certainly more evident with the old type cast iron head than with the present turbulent head. The following diagram shows how the above-mentioned system could be fitted up for experiment :- We propose to fit up such a system on one of the S.S. cars as it is simple to carry out and can be quickly compared for efficiency with a std. Phantom car. We will report on this as soon as possible. [Diagram Text] THERMOSTAT THERMO. HOT SPOT. RAD. RETAIN SHUTTERS WATER PIPE TAKEN FROM CONVENIENT SPOT OF CYL. HEAD. RETURN PIPE TO SUCTION SIDE OF PUMP Contd. | ||