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).
Standardisation sheet and modification details for the resonance silencer on 20/25 HP cars.
| Identifier | ExFiles\Box 104\2\ scan0071 | |
| Date | 14th November 1932 | |
| 85230 By.{R.W. Bailey - Chief Engineer} From Hs.{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey} Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey}10/MA.14.11.32. RESONANCE SILENCER FOR 20/25 HP CARS. We are issuing a standardisation sheet for the above. The final system is to E.58690 (Lec.3158) with alterations as shown in Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey}1/KT.19.10.32, and in addition one further modification as follows :- The first baffle E.58684 has four rows of ¼" diam. holes drilled in it, the inner most circle of these holes should be deleted. We have not yet had sufficient experience with the swinging link scheme of silencer suspension, this should not therefore be used; the present suspension system should be utilised. Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey} | ||