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 options for Bentley exhaust valves and pipes, referencing sketches and the Silver Ghost.
| Identifier | ExFiles\Box 178\3\ img189 | |
| Date | 30th May 1932 | |
| ORIGINAL RL/W30.5.32. E.{Mr Elliott - Chief Engineer} FROM R.{Sir Henry Royce} C. to SG{Arthur F. Sidgreaves - MD} work HS.{Lord Ernest Hives - Chair} BENTLEY EXHAUST VALVES. X4583 In reply to your memo. FH/HP26532. Firstly, I agree that it is highly desirable to group the exhaust pipes into two lots of three cylinders, the original Silver Ghost way. Secondly, regarding the cylinder head, my first choice would have been 'B' in your sketch if it were possible to bring out the two central exhausts separately, but I assume there is insufficient room between the cylinder head. My second choice is 'D' in your sketch because it is symmetrical, but it is quite possible that 'C' is nearly equally good. Assuming therefore 'B' to be impossible, I leave it to you to find out whether 'D' or 'C' suits the rest of the engine better. R.{Sir Henry Royce} P.S. On the telephone this afternoon E.{Mr Elliott - Chief Engineer} says he is sending another arrangement to choose from. Anyway a move for the purpose seems necessary, and I have suggested that it would be quite worth while to have two patterns made for test. R.{Sir Henry Royce} | ||