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).
Graph comparing power loss and B.M.E.P. for different exhaust systems on a Bentley V engine.
| Identifier | ExFiles\Box 97\3\ scan0052 | |
| Date | 15th February 1939 guessed | |
| BENTLEY V.{VIENNA} POWER LOSS (EXHAUST SYSTEM) S. A.{Mr Adams} CYL: HEAD EW. 1922. PISTONS P 446 (RAISED CROWN .470) CAMSHAFT EX. 31550 1.750 INDN: SYSTEM. TIMING @ .030 CL'CE. I.O. 3° AT. E.O. 44 B.B. I.C. 44 A.B. E.C. 6° A.T. ① OPEN EXHAUST ② R.M. 75 MANIFOLD. 2.750 DOWNTAKE ETC. (SEE REPORT) ③ CUT OUT OPEN. B.H.P. B.M.E.P. R P M C.T.S | ||