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).
New design for an exhaust manifold with two outlets for a Bentley 111.
| Identifier | ExFiles\Box 99\1\ scan0166 | |
| Date | 2nd July 1938 | |
| BY/NS.{Norman Scott} 423 c. Rm.{William Robotham - Chief Engineer} c. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} c. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} DA.{Bernard Day - Chassis Design}1/G.2.7.38. BENTLEY 111 - EXHAUST MANIFOLD WITH TWO OUTLETS. Please receive herewith E.CD.763 Exhaust Manifold for Twin Exhaust Systems - Bentley 111. This design has been made at the request of Rm.{William Robotham - Chief Engineer} for use in the experiments with a double exhaust system, as the present experimental manifold made from welded tubes does not stand up to the heat for very long. The position of the outlet flanges is taken from the preliminary design layouts of the double exhaust system, and we have joined the two flanges together to improve the resistance of the two outlet branches to fracture due to expansion effects. The flanges of the downtake pipes should, of course, be separate from each other as they would be difficult to assemble if the two pipes were joined together by a common flange. We have omitted spherical machining of the manifold flanges, and if the spherical joint washers for the downtake pipes are found to be necessary, provision will be made for them on the downtake pipe flanges. Will you please detail and instruct this pipe to be made for experimental use, the remainder of the exhaust system is being made by the Experimental Department for development purposes. [Handwritten Note] WYMAN If you do well enough with the single system as on 29GT we may not need this manifold D.A. Rm{William Robotham - Chief Engineer} | ||