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 performance results of Solex twin carburettor tests on a Phantom II engine.
| Identifier | WestWitteringFiles\U\January1930-April1930\ Scan020 | |
| Date | 7th January 1930 guessed | |
| SOLEX TWIN CARB. TESTS ON PHANTOM II ENGINE. OPEN EXHAUST RESULTS. POWER CORRECTED FOR TEMP & PRESS. B.H.P. 140 130 120 110 100 90 80 70 60 50 40 ENG. R.P.M. 750 1000 1500 2000 2500 2750 Curve Labels: R.R.C.H 1.190 D" CHOKE. 32 M/H SOLEX. .893 D" CHOKES STD. PHANTOM. | ||