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 power output of a Phantom III engine with an expanding choke carburettor versus a standard Phantom carburettor.
| Identifier | ExFiles\Box 13\3\ 03-page132 | |
| Date | 4th November 1929 | |
| V740 POWER OUTPUT WITH EXPANDING CHOKE CARB. COMPARED WITH STD PHANTOM CARB ON A PHANTOM III ENGINE. OPEN EXHAUST. 160 140 120 100 80 60 40 EXP CHOKE CARB. STD PHANTOM CARB. 750 1000 1250 1500 1750 2000 2250 2500 2750 R.P.M. 4/11/29 | ||