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).
Design, testing, and implementation of a new silencer for the New Phantom model.
| Identifier | ExFiles\Box 66\2\ scan0112 | |
| Date | 27th October 1925 | |
| 48230 BY23/H.{Arthur M. Hanbury - Head Complaints} 27.10.25. ------------------- SILENCER FOR NEW PHANTOMCodename for PHANTOM I. ----------------------- Referring to BJ8/H.{Arthur M. Hanbury - Head Complaints} 23.10.25. I have discussed the memo in question with Hs.{Lord Ernest Hives - Chair} and Wor{Arthur Wormald - General Works Manager}, and the position in regard to the silencer question is as follows:- 1. Mr.Royce is not satisfied with the silencer produced by the Experimental Dept. which was fitted to two of your Demonstration Cars. He has expressed the opinion that the design requires modification, and the loss of power is relatively too great. 2. R.{Sir Henry Royce} has supplied us with a new silencer design which we have completed and issued to the Experimental Dept. of which we should hear something in the near future as the question is simply one of loss of power which can be easily checked immediately the silencer becomes available for testing. 3. I am (not) of the opinion that it is necessary to test the silencer 10,000 miles, as there is nothing in its construction which is likely to cause it to fail. The issue is simply one of how much HP. is lost compared with the present type, and in this particular manner it must be better than the one put together by the Experimental Dept with the object of trying out what HP. would be lost in endeavouring to obtain the silencing effect as good as on the Silver Ghost. 4. After carefully examining the designs, both Experimental and R's proposed Silencer, it seems to me that on chassis delivered it will mean a new silencer, as it will be almost impossible to dismantle an existing silencer and built it up again to the new drawings and leave it in a reasonably decent condition. In this conclusion I am borne out by having submitted same to the Tinsmiths' Dept, who produce the silencers, giving them no lead as to what I wanted to know, but asking whether it is possible for them to dismantle existing silencers and re-make them, using up the body and the two end plates, with certain fittings. Contd. | ||