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).
Blueprint showing the results of Phantom camshaft experiments, comparing performance with different timing diagrams.
| Identifier | WestWitteringFiles\R\2October1927-November-1927\ 173 | |
| Date | 8th November 1927 | |
| PHANTOM CAMSHAFT EXPTS. 4.1 To 1 COMP'N RATIO WITH SHORT EXH. PIPES TO EACH PORT. TWO R.R.C.H. CARBURETTERS. STANDARD CAMSHAFT E.C. 2° I.O. 14° I.C. 30° E.O. 34° LONG DURATION INLET AND EXHAUST E.C. 10° I.O. 5° I.C. 52° E.O. 54° LONG DURATION INLET STD. EXHAUST E.C. 10° I.O. 5° I.C. 52° E.O. 42½° ALL TIMING DIAGMS WITH .020" TAPPET CLCE. B.H.P. ENGINE R.P.M. STANDARD. CAMSHAFT. LONG DURATION INLET STANDARD EXHAUST. LONG DURATION INLET AND EXHAUST No 5. MAX POWER IS REACHED AT A HIGHER SPEED WITH LONG DURATION CAMSHAFT. ACL / 26 8/11/27 | ||