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).
The effects of hot air intake on engine performance, power, and tendency to detonate.
| Identifier | ExFiles\Box 66\2\ scan0210 | |
| Date | 29th June 1936 guessed | |
| contd :- -7- Under the conditions tested we find that hot air - such as would result under the bonnet of the car in hot climates - in conjunction with the standard hot spot does not reduce the efficiency or economy of the engine but rather has the tendency to improve it. The power however falls with the increased temperature. We have not detected any increase in the heat flow to the water when consuming hot air. When running at a constant speed - as in these tests with a 4 to1 compression ratio engine - we could not discover any increase in the tendency to detonate. This may become more evident on the actual car when 'picking up' under load or when using a higher compression ratio and we will try to find a means of settling this point. Hs {Lord Ernest Hives - Chair} /A.C.Lovesey. | ||