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 power curves for three different induction systems on a Phantom III engine.
| Identifier | ExFiles\Box 20\9\ Scan109 | |
| Date | 22th January 1936 | |
| PHANTOM III INDUCTION SYSTEM COMPARISON., SP{Mr Spinney} 21., No. 9 UNIT - WHITEMETAL BEARINGS - FULL SPLIT PISTONS., (OPEN EXHAUST POWER CURVES), ① A........A STANDARD 4 R-R CARB SYSTEM., ② *---*---* DUPLEX DOWNDRAUGHT STROMBERG EE3 (1 9/16 CHOKES) MOCK UP IND'N SYSTEM (RHC{R. H. Coverley - Production Engineer}/CPI/EP{G. Eric Platford - Chief Quality Engineer} 26-11-35), ③ ______ WITH LEC 4748 IND'N SYSTEM, OTHERWISE AS ABOVE., VALVE TIMING, .020 CLCE, EC 6°, IO 8°, IC 46°, EO 44°, BHP, MEP, RPM, IND DEPN., INS HG., BMEP, LB/□", RHS, 22-1-36 | ||