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 performance of a modified silencer for the Phantom model.
| Identifier | ExFiles\Box 66\2\ scan0121 | |
| Date | 23th November 1925 | |
| R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. Expl. No. +8230 REF: Hs{Lord Ernest Hives - Chair}12/LG23.11.25. EXPERIMENTAL REPORT. To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. BJ. c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} c. to Wor.{Arthur Wormald - General Works Manager} SILENCER FOR PHANTOM. We find that the silencer with the concentric tube made to the LeC. design, does not silence the exhaust so effectively as the experimental ones which are running. The drop in horse power is less than on the experimental silencers. As the object of the modification is to obtain a degree of silence, we have added a further baffle to the LeC. silencer. We consider now, the silencer is very nearly equal to the original experimental ones and we are obtaining comparative figures for the drop in H.P. Hs.{Lord Ernest Hives - Chair} | ||