If Alcohol is the way to go in planes, then WHY do we all
run 50cc gasoline singles 2-strokes in our 80-86 wingspan aerobatic aircrafts???

These do not cost 4000$ dollars , and do they NOT, FLY lighter than a 2METER pattern plane with
a 3m 1.70 or a ys 1.70???? Or am I wrong?

I think the reality of it all is that, with the current rules, NO manufacture will make a pattern engine
that is LIght enough or powerfull enough to compete in the highest levels of pattern..
It just isn't going to happen..