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 max power and performance of S.U and RR J3 carburettors for the Peregrine engine.
| Identifier | ExFiles\Box 1\10\ B001_X106 TO X 110-page110 | |
| Date | 30th May 1933 guessed | |
| MAX POWER COMPARISON OF CARBURETTERS - PEREGRINE TWO S.U - RR J3 SEMI EXPANDING S.U 1 1/4 DIA - BALANCE PASSAGE .375 DIA. 1.600 LONG R.R. MAIN JET .138 DIA. NEEDLE - 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 HEAD 6.36 C/R RH{R. Hollingworth} PR 44 LAP SPEED. BROOKLANDS S.U's 73.24 R.R. 73.02 CONSUMPTION AT 42 M.P.H. S.U CARBS 17.5 M.P.G 73.24 R.R. J3 15.6 M.P.G 73 M.P.H S.U R.R. J3 CONSUMPTION B.H.P. PTS / B.H.P / HR. M.E.P. INS HG | ||