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 showing power loss to a single outlet exhaust manifold for a Phantom engine, plotting Brake Horsepower against RPM.
| Identifier | WestWitteringFiles\R\2December1927-February1928\ Scan012 | |
| Date | 26th November 1927 | |
| POWER LOSS TO SINGLE OUTLET EXHAUST MANIFOLD (PHANTOM). V176. ENGINE RE.25. COMPRESSION RATIO = 4.12. LONG DURATION INLET CAM. STANDARD INDUCTION SYSTEM EXHAUST SYSTEM TO L.C.2432/6/7. BRAKE HORSE Po 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. | ||