Would you be so kind to post the source for these figures? Would it really be 130 grade fuel they used in, I assume, 1940?The standard Peregrin I using 130 grade fuel:
980 BHP with 3000 rpm at +9 lbs boost at 13,500 ft
In 1941 at least one improved 1-stage/2-speed Peregrin was looked at on paper, and a standard 1-stage/1-speed Peregrin was modified and tested with different S/C gear ratios (the ratios were unspecified in the memo) to simulate the effects of different high and low gears. On the test stand (with 130 grade fuel) the test data indicated the 1-stage/2-speed Peregrin would have an output of:
930 BHP with 3000 rpm at +9 lbs boost at 15,500 ft in high gear
1010 BHP with 3000 rpm at +9 lbs boost at 6,500 ft in low gear
1000 BHP at 3000 rpm at +12 lbs boost for TO
These figures look very believable, for a Peregrine with a better S/C.
From where is that data from?