2 stoke, 4-stroke. Those are old news. I'm gonna get me one of these new 5-stroke engines: http://www.nitroplanes.com/fm01-20-f...troengine.html

I know it's a little off topic but someone sent it to me and I had to do a double-take. Talk about a typo...

As for the original question, the .46 2-stroke will be perfect for that airplane.