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).
Memo discussing exhaust system designs, comparing with Cadillac and proposing new tests.
| Identifier | ExFiles\Box 173\1\ img287 | |
| Date | 12th February 1934 guessed | |
| III Exhaust Systems You will have received the paper on exhaust systems that I sent you. It contains a number of novel suggestions, but I have met no one yet who is trying anything very different from what we are doing ourselves. Nevertheless I feel that we should continue working on Silencers as Cadillacs are doing better than we are with regard to weight & cost. One thing I think we should definitely try is a comparison of the 20/25 & Bentley heads on a 25 H.P. car, also composite camshafts & compression ratio to get some idea as to how raising the efficiency of an engine affects silencing difficulties. Information obtained from Cadillacs is briefly. 1) They find the two 6 cyl banks of the twelve far more difficult to silence than the two 8 cyl banks of the sixteen. 2) They find the lowest silencer volume with which they can get satisfactory | ||