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 four different carburettor arrangements on a Phantom II engine with a 4.9 C/R aluminium head.
| Identifier | ExFiles\Box 181\M13\M13.2\ img070 | |
| Date | 8th July 1931 guessed | |
| Hs{Lord Ernest Hives - Chair} 411 COMPARISON OF VARIOUS CARB. ARRANGEMENTS P II 4.9 C/R ALUM HEAD ① TWO S.U'S PIPE ABOVE ② AS ① BUT PIPES JOINED TOGETHER CENTRALLY WITH THROUGH BORE ③ TWIN RR CARB 1.4 DIA CHOKES ④ SINGLE CLAUDEL EAGLE IX CHOKE 1.8 DIA ALL TESTS OPEN EXHAUST B.H.P. ENGINE R.P.M. INS Hg INDUCTION DEPN B.M.E.P. Valve Timing Diagram: EX, IN, 17, 59, 65, 13, 4 RM.{William Robotham - Chief Engineer} 7731 | ||