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 for a modified single exhaust manifold on a Phantom engine.
| Identifier | ExFiles\Box 66\2\ scan0307 | |
| Date | 20th November 1924 | |
| POWER LOSS TO MODIFIED SINGLE EXHT MANIFOLD (PHANTOM) V181 ENGINE RE 25 COMPRESSION RATIO - 4.12 LONG DURATION INLET CAM STANDARD INDUCTION SYSTEM EXHAUST MANIFOLD TO L.e.C 2432/6/7 BUT MODIFIED TO V182. BRAKE HORSE Pr R.P.M. OF ENGINE CURVES ① OPEN EXHAUST. ② SINGLE OUTLET MANIFOLD TO L.e.C 2432/6/7 MODIFIED TO V182 + FRONT SILENCER. ③ UNMODIFIED SINGLE MANIFOLD + FRONT SILENCER. | ||