Hanno was disqualified in the '84 TOC for what was supposed to be a Steen Skybolt.....it had two wings and a motor and that's about as close as it came. He flew a Skybolt in '88, which was his last TOC. As an observer, I thought it really stretched the rules limits then.

I started documenting aerobatic aircraft and drawing 3-views for Dick and a couple of TOC pilots for the '88, '90 & '92 TOC's and from '92 on assisted in the scale verification process at the TOC...and it was amazing how many different 3-views would surface for the same aircraft. The most striking was the Ultimate 10-300. Between Gordon Price's original Bluehawk and the latest Labatt's Blue version, the wing span was clipped, and the stab location was shifted, which opened the door for a bit of controversy now and then.

With todays wide variety of kitted IMAC models, one can only assume that the scale is correct....but like Dick points out, put all the Extra 300's or CAP's or Yak 54's....pick one....from the different manufacturers side by side and it makes you wonder who's got it right.
I've yet to see a CD argue scale at an IMAC contest, since most models flown are kitted to some degree.

Technically there are rules ~ based on the wing span (which establishes the scale) all other lengths, widths and plan form dimensions must be within 10% of scale and the model should appear to be a scale likeness of it's full-size counterpart from a distance of 10 feet.

Bottom line: don't worry about it!

Larry Lutton