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 carburetor arrangements for a PII engine with an aluminum head.
| Identifier | Morton\M9\ img028 | |
| Date | 10th 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 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. INDUCTION DEPN INS HQ B.M.E.P. 110° SHAFT E32381 RM.{William Robotham - Chief Engineer} 7731. Valve Timing Diagram Text: EX, IN, 17, 59, 65, 13.4 | ||