I have built and flown planes up to or just a taste over 42%, I don't like to bother with the big ones any longer due to money and the problems with hauling them, biggest I fly today is just over 30% and even that one stays in the shop most the time, I have either sold or taken apart my big bipes, those are a true pain in the mule. As an IMAA inspector all I could think of when I saw Bobs 70% was a big, Oh My God!! I have only seen photos of RC planes that size from magazines from the UK where there are no weight limits.
So, I have to ask, what it the weight of that big critter?? Every year at the Castle IMAA event we had an AMA inspector that would give the planes of 100 pounds the once over then test the planes and pilots to get there waver. When a plane weighed in at over the 100 pound mark they couldn't get one and turned into desert flyers. Is that big plane flown at air shows?? Is it AMA legal in this country? Tell us about it, what engine, servos, gear do you have in the beast?