ORIGINAL: Danny Baker
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,
Don't know why I saw this but my 300 EXCESS was within 10%of 300L EXTRA dimensions -I used EXCESS factory dimensions . There are hardly any of the current large IMAC EXTRAS which fit " 10% "rules
measure em.
Also there is NO dimension rule
Only if the CD chooses to measure the model.
Then 10% applies there better be scale drawings on hand to proove /disproove disputes -and in actual practice, this NEVER happens
I also built models flown TOC ( three different designs)and they were correct -however some entrants models did NOT fall within guide lines - they passed with a wink and a nod. Again, intent was the guiding idea
I was Line Chief at last TOC- and know what was /was not to the letter of the law.
For IMAC, if the CD thinks the model looks like the full scale - it's in
My EXCESS had retracts for pattern and fixed gear for scale here is a 300 version.
compare these photos with many presently accepted EXTRAS.