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).
Exhaust noise for car 103-MC, comparing it to other models and different silencers.
| Identifier | ExFiles\Box 71\3\ scan0324 | |
| Date | 12th September 1925 | |
| R.R. 493A (50 H) (D.D. 31. 12-6-25) J.H.D. 48950 EXPERIMENTAL REPORT. Expl. No. REF: HS{Lord Ernest Hives - Chair}4/LG12.9.25. To B.J. from Hs.{Lord Ernest Hives - Chair} EXHAUST NOISE ON 103-MC. 48230 When we had this car at Derby we made comparative tests as regards the silence compared with a standard Phantom and a Silver Ghost. They were all open cars. We think we the only way to judge the exhaust is on cars with similar bodies. It was certain that there was a marked improvement on 103-MC compared with the standard Phantom, although we have not reached the silence of the Silver Ghost exhaust. At the moment we do not know how to make it any better. If no improvement can be appreciated in the latest silencer fitted to 103-MC compared with the first modified silencer, the first one is to be preferred because it is easier to produce. We ourselves, however, are satisfied that the second silencer is more silent. Hs.{Lord Ernest Hives - Chair} | ||