CYCLOPS, good point. It is for me a matter of curiosity to know what the thrust is, I do a fair amount of scratch building and like my planes to have unlimited vertical. With 1/2A models, that doesn't allow for much margin of error. The THRUST HP CALCULATOR is a handy tool to have and the down load is free.
I built a test stand where the engine is mounted to a set of gliding rails. The engine is positioned vertically, and the idea is to find out how much weight the engine/prop can maintain in a hover. I compared my findings with the theoretical results at THRUST HP and they were very close.