ORIGINAL: AWS
the imac 10% rule has always been meaningless, since i am not aware of any event that had the resources or the need for it to be properly enforced. but assuming that it is a valid consideration, your next problem is finding the full scale documentation on a cap 21. but perhaps the best idea is to convert into something else - like a 231/EX...take a wing planform from an Extra 300S and design it for the Cap. It will fly much better and no one will know the difference.
Bob Mellen is a local, and a very good guy.
P
Agreed
If the 10% rule actually was applied--99% of our airframes wouldn't qualify.
Extra 330L--never made by the factory. Doesn't qualify. Thousands of them flying IMAC. Good luck finding factory specs and documentation on
that plane.
I have a World Models 90" Extra 330L in a box. I'm not putting the 330L stickers on it. It's a 300L if I ever saw one.