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).
Engine performance related to water temperature, noting issues with cold seizures and proposing an automatic water temperature regulator.
| Identifier | ExFiles\Box 147\5\ scan0054 | |
| Date | 16th January 1914 guessed | |
| Wor{Arthur Wormald - General Works Manager}/EH3/L16114. Sheet. 2 On our present engine the exhaust boxes being directly under the induction pipe is a good point, it keeps the pipe warm. Not only is a cold engine unpleasant to drive but it is very easy to seize it up, we have had several cases of seizures before the water is hot, we put it down to the neat petrol washing the oil off the cylinder walls. We find on the test plate that it makes 3 notches difference in the position of the mixture lever when the water is 50ºC and 100ºC. It is interesting to note that on the test engine at the low speeds we get more power when the water is cold, this is hardly a road condition because the oil in the base and all the working parts were normal temperature, it was only the water that was at 50ºC we tried with the engine hot and the carburetter cold but it made no difference to the power at full load with the mixture adjusted to suit. I think it would be an excellent thing to have an automatic water temperature regulator, we have proved what advantage it would be in England but it would be a much greater boon abroad where there is more extreme climate, America for instance. EE 327 v (20 M) (A/N 308 Prod) G' osPP. | ||