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 carburetor arrangements on a Phantom II 4.9 C/R engine with an aluminum head.
| Identifier | ExFiles\Box 102\1\ scan0026 | |
| Date | 13th July 1931 guessed | |
| SHEET II 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. INDUCTION DEPN INS HG B.M.E.P. ENGINE R.P.M. 110° SHAFT E32381 EX IN 17 59 13.4 65 RM.{William Robotham - Chief Engineer} 7731. | ||