ORIGINAL: rmenke
Kevin:
The only problem I might have with this airframe is weather or not the arf design takes away the wing leading edge back for about 4" and 2.5 wide, for ease of construction. This cut out takes a lot of wing streingth away in the Ultra and Super Sport arfs...........
as mentioned above I've had quiet a few of the US40 ARFs and I've never had a wing failure, my last one flew for 6 or 7 yrs with an OS 70 4-stroke and then the Jett 90LX, if wing failure was an option, it would of defiantly happened and it didn't, i just a few months back gave the airframe to a fellow modeler and it's still in great shape. never had a single problem with any of them other then the stab/fin tips, they are plastic caps and they do come unglued and often lost in flight.
kc