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).
Modification to add stiffening ribs to the exhaust manifold for Bentley 111 and Wraith III engines.
| Identifier | ExFiles\Box 99\1\ scan0171 | |
| Date | 28th November 1938 | |
| BY/NS.{Norman Scott} c. Rm.{William Robotham - Chief Engineer} c. Rm{William Robotham - Chief Engineer}/TMW 423 DA.{Bernard Day - Chassis Design}3/G.28.11.38. WYLIE File BENTLEY 111 - EXHAUST MANIFOLD. Please receive herewith E.CD.1031 Stiffening Ribs for End Branches of Exhaust Manifold - Wraith 111 and Bentley 111. This modification is intended to provide additional resistance to the tilting of the end branches of the manifold, as experienced on 8-B-V.{VIENNA} on its recent 15,000 miles test run, the rear flange being most affected resulting in a leaky joint. Will you please instruct the altered pipe experimentally for Bentley 111, so that it can be tried out on the next test car. As the Wraith 111 and Bentley 111 engines at present use a common manifold, the modified pipe, if adopted for the Bentley 111 should also apply to the Wraith 111. DA.{Bernard Day - Chassis Design} | ||