Hello,

I've just made a start on building a 1/3 aeronca champ from plans by John Marquette. It's a large plane but quite light at around 30lbs. On the drawing the recommended engine range is 40-50cc, I have a Thor 45cc petrol so seems ideal and flying style will be very scale. Reading on web is quite confusing however as folk go on about 60 and even 80cc engine's for it which well above what's stated on the drawing. The original full size only had 65bhp later going up to about 110bhp so it was never over powered. As I have an engine for it I'm quite reluctant to spend a lot of money on a new engine based on unverified suggestions. There must be quite a few of these now built, can anyone offer some advice based on real models? Thanks, Scott.