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).
Design changes for an engine silencer system, including welding and brazing instructions.
| Identifier | WestWitteringFiles\F\March1921\ Scan18 | |
| Date | 1st January 1921 | |
| To DA.{Bernard Day - Chassis Design} from E.{Mr Elliott - Chief Engineer} -2- E2/CG/1/21 Contd. (8) The holes for the diaphragms should be re-arranged. They should be fewer in number, and larger in size. And spread in a double line round the outer edge of the diaphragm, leaving the centre unpierced. (9) The incoming pipe from the engine should be cut off so that it does not enter the silencer pipe at all. It should, however, be allowed to project through its own flange by about .4" for spigoting purposes. The objects of this alteration are, less expense and weight, and more convenience in erecting the connection pipe to the engine. (10) The diaphragms should be secured to the silencer shell by spot-welding in six places only. Mr. Royce wishes to avoid a multiplicity of fastenings where it is not necessary to make a joint. (11) To simplify the process of making the silencer ends, these latter should be turned in on their outer edges, and welded instead of being turned out. Further, they should be made to pass outside of instead of inside the silencer and flanges, and the end plates and end flanges should be pot brazed together instead of being welded. (12) The flange on the incoming pipe, and on the swan-neck pipe should be pot brazed instead of welded. E.{Mr Elliott - Chief Engineer} | ||