One other factor. Your prop will unload in the air and will draw less current, which will also extend battery time. Thrust is not the only consideration. Compare the 1047 with the 1080. The 1047 has a lot more thrust than the 1080. But you couldn't fly a lot of planes with the 1047, because you couldn't get enough speed out of it. Most measurement you see are static thrust. The thrust you would see from the plane standing still. Once the plane is in forward motion, the pitch starts to become more important. One thing I would like to see, but I know it would be a pain to measure, is the static thrust and then the thrust against a 20mph wind.