RE: Top Flite Cessna 310 posted
Wing span has nothing to do with it. Wing area is the important factor. As wing area goes up, the airplane can support a higher wing loading. The 310 supposedly has a wing area of 948 sq. in. which would be about right for a 60 size trainer or a 90-120 size aerobat. Either of which would probably have a wing span of about 70 inches, putting them, and the Top Flight 310, squarely into your 25-30 oz category.
Jim