Right on Roguedog!

Wouldn't it be cool of all plans were laid on vellum graph paper. I had noticed the 1" grid for the 60 but I sure didn't expect all the plans to come out at even 1/8" intervals including the 120! I just said... ok, what's a good size/span/weight for a craft with this engine size? I then scaled them according to my "educated guesses". And then I measured them in turn and, bang - 1/8" steps!

Come to think of it, that might just apply in general when scaling models... I'd just have to figure out (or dig up from some good aeronautical engineering book) the relationship between power/displacement and wing span - a nice little formula of sorts. With displacement roughly doubling at 1/8" intervals what does the power curve look like?

In any case, what do you say about that Deception?

Cheers, David.