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).
Secret memo regarding the design and drawings for an exhaust system, detailing a new silencer and a cut-out valve.
| Identifier | ExFiles\Box 66\2\ scan0003 | |
| Date | 31th May 1924 | |
| √8230 To BY.{R.W. Bailey - Chief Engineer} from E.{Mr Elliott - Chief Engineer} c. to CJ. HS.{Lord Ernest Hives - Chair} S E C R E T. E1/M31.5.24. E.A.C. 11. EXHAUST SYSTEM. X.9230. X8230 We send you herewith drawings Nos. LeC.1874, 1875, and 1877 dealing with the lower portion of the exhaust system opposite to the engine. The remainder of the scheme is being handled by Mr. Day, and will consist of a silencer of the dimensions of the present 40/50 rear silencer, but fitted with more baffles to secure the necessary degree of quietness. There will also be a cutout of the through pipe pattern, having we think a single butterfly valve at the rear end of the silencer, and a deflector pipe to shoot the exhaust gases when the cut-out is operating, in a direction in which they are least likely to enter the body of the car. MADE AT CROXLEY E.{Mr Elliott - Chief Engineer} | ||