an airplane will fly on the wing with half thrust to weight 10lb
plane 5 pounds thrust no real reserve 1 to 1 if the prop is unloading it will continue to climb vertical until the air density
won't let it 11/2 to 1 unlimited 2 to 1 unlimited and excelerating.
in the real world most planes not some experimental that somebody stuffed a big motor in most are about .6 to 1
roy