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 Small and J3 R.R. Semi Expanding carburetters for the Peregrine setup.
| Identifier | ExFiles\Box 1\10\ B001_X106 TO X 110-page108 | |
| Date | 28th May 1933 guessed | |
| MAX POWER COMPARISON OF CARBURETTERS - PEREGRINE SMALL AND J3 R.R. SEMI EXPANDING SMALL 1.975 DIA AIR VALVE J3 MAIN JET .138 DIA BALANCE PASSAGE .375 DIA : 1.600 LONG NEEDLE 140 + .085 DIFFUSER DISCHARGE HOLES 4 + .098 TOP BLEED 3 + .039 BOTTOM BLEED 3 + .046 LIGHT AIR VALVE LIFTED 3500 HEAT TO TOP OF PIPE ONLY SMALL VALVE NON TURBULENT HEAD 6.36 C/R LOSS IN TOP SPEED PERFORMANCE WITH SMALL PEREGRINE CARB. VERY NOTICABLE CONSUMPTION AT 40 M.P.H. LARGE CARB. 15.8 M.P.G. SMALL CARB. 17.5 M.P.G. B.H.P P.B./BHP/HR M.E.P. INS. HG SMALL CARB. J3 CONSUMPTION | ||