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).
Four proposed designs for a sheet metal silencer nozzle.
| Identifier | ExFiles\Box 45\3\ Scan123 | |
| Date | 26th May 1920 | |
| To R from DA.{Bernard Day - Chassis Design} Copy to DH.{D. Henderson - Showroom} Copy to EFC. X.4072. DA{Bernard Day - Chassis Design}2/CB26-5-20. X.4072 SILENCER NOZZLE. We send herewith a print of "N" Sch: 366 shewing the proposed sheet metal nozzle. Fig I shews the nozzle made out of sheet steel pressings, the reinforcing pieces at the end being passed through oblong punched holes. Pieces of tubing welded in each half of pressing, place of riveting. This scheme also shews the nozzle, butt welded to the pipe. Fig 2 shews the same scheme but the nozzle is pushed on the pipe and welded at the back end, and the reinforcing pieces are fitted into open slots. Fig 3 shews a suggestion for a casting bolted to a flange, the flange itself being brazed to the exhaust pipe. Two types of flange - a 6 bolt and a 4 bolt are shewn, and two methods of making the spigot. It may perhaps be considered that a spigot is not necessary in any case. Fig 4 shews a proposal for pushing the casting on to the pipe and clamping by means of bolts, but our experience is that these aluminium lugs are very liable to fatigue, due to the tension of the bolt. We are proceeding to make wooden model, and also have pieces made for the purpose of test. DA.{Bernard Day - Chassis Design} RECEIVED WYA 31 1920 ELC | ||