ORIGINAL: WR450
Hi Outacontrol41 the moki 150 will fly your plane just fine I was using a 150 on my 35lb yak one thing about the 3 blade props they make the engine run very smooth but act like a brake when landing you have to land with a little power the moki 150 is rated to fly up to a 40lb plane so you would be fine with a 20lb plane.If you do get the moki 150 get bthe power pump 380 also and a turblater the pump is a fuel pump made just for the moki engine and the trubolater is uint that fits beteewn the carb and intake it helps with ilde and air/fuel ratio.
wr450
Saving $$$ now...these engines are not cheap but I think they're priced better than O.S. new 7 cyl. which I was considering at one point. Gas engines are so much more appealing to me than messy glow engines. I think I'd end up with a 30 lb. plane. I could use a 28'' prop but I'd be afraid if ground strikes. Most bi-planes have to be flown in with some power as they were not designed to be floaters. Might even sell my O.S. now. [&:]