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 of Brake Horse Power vs RPM showing power loss for a Phantom engine with a single outlet exhaust manifold.
| Identifier | ExFiles\Box 66\2\ scan0304 | |
| Date | 26th November 1927 | |
| POWER LOSS TO SINGLE OUTLET EXHAUST MANIFOLD (PHANTOM) ENGINE RE 25. COMPRESSION RATIO = 4.12 LONG DURATION INLET CAM. STANDARD INDUCTION SYSTEM EXHAUST SYSTEM TO L.E C. 2432/6/7. BRAKE HORSE POWER R.P.M. OF ENGINE. CURVES. ① OPEN EXHAUST ② MANIFOLD + FRONT SILENCER. ③ COMPLETE SYSTEM (CUTOUT OPEN). ④ COMPLETE SYSTEM (CUTOUT SHUT). THESE CURVES ARE CORRECTED TO N.T.P. ACTUAL AVERAGE AIR TEMP (CURVE ④) = 43.7°C. | ||