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).
Blueprint graph comparing the power output of a Phantom II engine with standard versus larger expanding carburettors.
| Identifier | ExFiles\Box 179b\3\ img296 | |
| Date | 3rd March 1933 guessed | |
| V/1523 RM{William Robotham - Chief Engineer} P54 POWER OUTPUT (PHANTOM II) OPEN EXHAUST COMPARISON BETWEEN STD EXPANDING CARB. (E.83441) AND LARGER EXPANDING CARB. (LEC. 3137) INTAKE BODY (E.83324) 5.25:1 COMPRESSION RATIO 114° CAMSHAFT (E.B.2448) TIMING .020 CLCE. IO - TOC IC - 56° PBDC EO - 51° BBDC EC - 8° PTDC LEAD-BRONZE BIG END BEARINGS EXP'DG CARB. TO LEC. 3137 STD. E.83441 140 180 | ||