ORIGINAL: asmund
In real world numbers my MVVS 26cc gasser turns Menz S 18-6 at 8600 rpm and my new ASP 180 fs turns the same prop at 8350 rpm. Not many 91 twostrokes or 100-125 fourstrokes will follow that MVVS gasser. Weight is another matter though
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I am an MVVS 26cc/Evolution 26 GT fan too. I've owned several MVVS 26 engines and I presently own the Evolution 26 GT engine.
As we all know, how fast the prop spins is only 1/2 the equation. Weight is another. In terms of thrust versus weight, I doubt if there is much difference in the end result between a strong .90 - 1.00 two-stroke glow engine. One thing for certain, the glow engine will turn inside of the gas/petrol engine's radius every time, due to lighter OAW.
All of us know this, so I'm wasting the skin of my fingertips typing it. <G>
All of you should know too that I like to use a gas engine whenever possible. Getting a gas powered anything to come in at under 11 lbs. is going to be tough.
Ed Cregger