The rule has always been 10% mods from the full-scale. The mods can be in fuse length, stab span, rudder height, etc. Mods must originate from the 3-view of the full scale. Mods do not include hinge lines (you can make the hinge line where ever you want on the wings, stabs, or fin). At the TOC, they were very strick on the 10% rule. It even included gear height since that measurement could be obtained from the 3-view. TOC pilots had to send in documention months in advance so to be sure their plane would not get rejected the day before the meet started.

Yes, All QQ's planes are IMAC legal. QQ is a past TOC pilot, enough said.....

Perhaps SCAT (IMAC "one-off" out west) has a 20% rule. IMAC has always been 10%. At least in my 12 years of competing.

That Gator Giles And Hanson's Excess are both NOT legal for IMAC. I remember that Gator Giles. Looked like a pattern plane with a Giles windshield. The plane would only be legal in our Basic class.

Danny,