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).
Recommending a silencer for the noisy release air discharge from an SS vacuum pump.
| Identifier | ExFiles\Box 152\3\ scan0044 | |
| Date | 23th January 1929 | |
| To E.{Mr Elliott - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/ACL. c. to BY.{R.W. Bailey - Chief Engineer} c. to Wor.{Arthur Wormald - General Works Manager} X442 Hs{Lord Ernest Hives - Chair}/ACL1/LG23.1.29. SILENCING RELEASE AIR FROM SS.{S. Smith} VACUUM PUMP X7510 The release air discharge from the vacuum pump being intermittent is rather noisy and we have considered it advisable to silence this. We constructed a small silencer consisting of a circular box with a drilled central discharge pipe leading into the carburetter air intake as shewn on appended print. This proved to be quite efficient, the release being quite inaudible with the bonnet closed. We recommend that some such form of silencer, or one incorporated with the air intake, should be applied to the SS.{S. Smith} engines. Hs{Lord Ernest Hives - Chair}/ACL. | ||