Your computations reflect my thinking. With this kind of torque, I would be able to turn my very coarse prop at the power to give me good takeoff performance, and with shifting gears, I would also be able to utilize that coarse pitch for high speeds. All my work, WHICH IS MINIMAL since the only thing I am doing is adapting a strong prop shaft support to the engine, is empirical. I really don't care about "numbers" yet, because I have yet to prove the concepts. The engine is ready to mount into the plane right now with its prop adapter already on. I just have to mount the cog belt drive, and connect things. But, I do have other projects with much higher priorities. The engine conversion is a labor of love, because that is where my real interests lie. And, if it doesn't work, then I will remount the VW that came with the plane, and sell the whole thing. Very little cash out, and a nice idea at least that satisfies my curiosity as to whether I could revolutionize aviation. Or not.The gearing at say 3.2 would produce a prop rpm of 2500 and that multiplies the torque to 275!