I am in the process of assembling a NPExtra 330l in the 77in size. I would like to know what engines people have on them. It is rated for a 40-50cc, but to me a 40 would be more appropriate for a 77in span. They recommend a ZDZ40 but that is a lot of money when there are other choices around. I am considering the Cermark SPE43. When you look at the specs, the wing loading comes out about 29ozs. at 14lbs. So it won't be terribly overweight but it is near the breakpoint for the 50s.

It will fly great with a 40cc-45cc engine but if it were mine and Iwas spending the money on an engine, I'd go for a lightweight 50cc like a DA-50 or one of the look-alikes.

DL 50.