Messerschmitt Me 262 and P-80 Thrust, Drag, and Horsepower

Can you calculate the horsepower of a jet engine? Yes you can, and it actually matters for certain aspects of aircraft performance.
We will be using the Me 262 and P-80 Shooting Star for these calculations, which will lead to some interesting comparison data.
Plus I'll work a little bit of Spitfire Mk 14, de Havilland Hornet, and F-14 in there too.
If you find any math errors, please let me know, and I'll add them to the comment section. I'm not perfect, and I made those charts pretty quickly.
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