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 different induction systems on a Phantom III No. 9 unit with whitemetal bearings and full split pistons.
| Identifier | ExFiles\Box 93\2\ scan0132 | |
| 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 STANDARD 4 R-R CARB SYSTEM. ② DUPLEX DOWNDRAUGHT STROMBERG EE3 (1 5/16 CHOKES) MOCK UP IND'N SYSTEM (R.H.C/CP1/EP{G. Eric Platford - Chief Quality Engineer} 26-11-35) ③ WITH LEC 4748 IND'N SYSTEM, OTHERWISE AS ABOVE. VALVE TIMING .020 CL'CE EC 6° IO 8° IO 46° EO 44° BHP MEP INS HG IND DEPN. R.P.M. BMEP LB/□" RHS 22-1-36 | ||