The following curves compare the speed and climb performance of the P-38G, using the conservative Wright-Field data as a baseline (red), and that generated by Kelsey and Hough (orange) as the maximum limit (notice that the cleaner G model is faster than the J when at the same power). The power settings actually used in combat fell somewhere in between. Notice how the high CAT-induced power reductions above 15,000 feet affected P-38G performance. In fact, any high power setting with the carburetor air temperature above 45-50 degrees C was, supposedly, risky. Also shown are curves for a P-38J at WEP using both 130 and 150-grade fuels. 150-grade fuel was used by the US Eighth Air Force from mid 1944 to the end of the war. The P-38J curves are modified Wright Field data verified by power required calculations.
� 1998 -