RE: car/plane
tIANci - i was also wondering about the 2 lb car. but then again, the guy is from NH not from Hampshire so it is unlikely that he is using metric. And maybe he has a plastic truck rather than a hopped up metal offroader. still 2 lbs does sound awefully light.
the rest of your post about axi outrunners and 5S2P packs was just mean :-) hahaha... 16 x 8 prop... i can totally imagine that wry smile across your face when you were typing that post in!
anyway, the avistar has a 59" and a chord of just over 10" so it fits your requirements :-) with a wing are of 600+sq.in. and a tIANci-estimated weight of 8 lbs, you get a wing loading of around 30oz/sqft. which is like a heavy warbird.
mittimj - the best way to find out is to strap whatever the weight of your car is to the avistar first to see if it'll fly at all. and do it incrementally. if your beast weighs in at 2 lbs, try one then two. if it weighs in at 4 lbs, try one, two, etc. this is the only safe way to find out. oh yeah... with 4 lbs strapped to your avistar, you'd better have beefed up the wing and the landing gear. and fly very gently.