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).
Improvements and requesting modifications to the 20/25HP Resonance Silencer for trial fittings on several cars.
| Identifier | ExFiles\Box 104\2\ scan0061 | |
| Date | 3rd October 1932 | |
| X.5230. RHC.{R. H. Coverley - Production Engineer} From Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey} Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey}5/MA.3.10.32. 20/25HP. RESONANCE SILENCER. We have improved the 20/25 HP Resonance silencer (E.58690) considerably by making a few small modifications and have now arrived at the stage when we can try it out on several cars. Will you please modify the silencer which was in course of production for GLN-60 to the attached print (Hs.{Lord Ernest Hives - Chair}718), the idea being to put it on to a trials car. It should be fitted up with a standard 20/25HP. downtake pipe and front expansion box, and a P.II (2"dia) swan neck and fish tail. Will you please modify the silencer on 19.GIV. to Hs.{Lord Ernest Hives - Chair}718 retaining its straight through intermediate pipe and swan neck. Will you please make for 18.GIV. a 1.750" dia. swan neck fitted with a P.II fish tail. Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey} | ||