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).
Performance graph comparing various carburettor arrangements on a Phantom II engine with an aluminium head.
| Identifier | ExFiles\Box 13\3\ 03-page326 | |
| 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 Y-AXIS LEFT: B.H.P X-AXIS: ENGINE R.P.M. Y-AXIS RIGHT: INS HG, INDUCTION DEPN, B.M.E.P VALVE TIMING DIAGRAM: EX 59 17, IN 13.4 65 RM{William Robotham - Chief Engineer} 7731 | ||