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 the performance of a standard versus an experimental 'long duration' camshaft on a Phantom engine.
| Identifier | WestWitteringFiles\Q\2-July1927-September1927\ 42 | |
| Date | 15th August 1927 | |
| o/120 CAMSHAFT COMPARISON ON STD PHANTOM ENGINE. THE EXPL. CAMSHAFT HAS THE INLET DURATION INCREASED BY 28° AND THE EXHAUST BY 12°. THE POSITION OF INLET OPENING AND EXHAUST CLOSING REMAIN THE SAME AS STANDARD. B.H.P. STANDARD CAMSHAFT. LONG DURATION CAMSHAFT. R.P.M. | ||