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).
Performance graph detailing power losses for the Phantom II Short Type exhaust system, comparing Brake Horsepower and Brake Mean Effective Pressure against engine RPM.
| Identifier | ExFiles\Box 6\7\ 07-page171 | |
| Date | 2nd November 1931 guessed | |
| LOSSES TO EXHAUST SYSTEM. Ph. II SHORT TYPE C.O. OPEN AND CLOSED 4-6 C/R 108° MASKED VALVE CAMSHAFT TWIN CARBS 1.4 CHOKES OPEN EXHAUST COMPLETE Ph II SHORT TYPE EXHAUST SYSTEM C.O. OPEN B.H.P. B.M.E.P. R.P.M RM.{William Robotham - Chief Engineer} P 33 | ||