RE: THRUST VS. PLANE WEIGHT?
I think we get too wrapped around the power thing. Enough power is all that's really necessary, but we have to define what we want to do with an amount of power. With gas engine specifically there's all too often the perception it's all about doing 3d stuff, when there are so many other types of flying that require much less power. Somebody has a light whiz bang 390 that he wants to hang on a prop and torque roll while the guy at the next flight station has a 48 pound Bf 109, and the guy in the next one has a 160" span Taylor Craft. Then you look back at the beginning of the flight line and you see the guy with the Trainer 40 and right next to him is a guy with a pylon mounted .048 on a 72" span glider. Not a one of them has the same power requirements.
So many different needs but so often completely misunderstood. Sometimes it's fun to just sit back and consider all the opportunities.