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 various carburettor arrangements on a Phantom II engine.
| Identifier | Morton\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 R.R. 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. INDUCTION DEPN INS Hg B.M.E.P. Valve Timing Diagram: EX 59, 13.4, IN 65, 17 RM.{William Robotham - Chief Engineer} 7731. | ||