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).
Letter to Professor W. Morgan of the University of Bristol regarding enquiries on engine detonation.
| Identifier | ExFiles\Box 42\4\ Scan045 | |
| Date | 21th September 1926 | |
| X3867 Hs{Lord Ernest Hives - Chair}/ACLL/T. 1699 21st Sept., 1926. Professor W. Morgan, B.Sc., M.I.A.E., Department of Automobile Engineering, University of Bristol. Dear Sir, In reply to your enquiries of the 3rd. inst. we have pleasure in supplying you with such information on the points you mentioned as we have obtained during our experience on these subjects. Owing to the pressure of business we regret we have been unable to answer you before this. It must be remembered that most of our experience is confined to multiple cylinder engines and while our observations taken under these conditions may not be of such academic interest as those obtained on single cylinder units, we think these results are fairly representative of the influence of detonation on engine performance met with in practice. We will deal with the points - such as we have information - in the order put forward in your letter. (1) When detonating with open exhaust, the gases seem to be slightly brighter than when free from detonation. (2) The Effect of Speed on Detonation. The effect of speed of rotation upon detonation when the I.M.E.P. remained constant was demonstrated in the following way. The power to drive the engine was accurately known at each speed and the B.M.E.P. was adjusted by means of the throttle to obtain a constant I.M.E.P. (Contd.) | ||