One thing I'm currently pondering is retracts for a bird this size. I plan on building mine around the 25 lb mark. Since it has a single main gear that would handle the landing load, that retract would have to be as strong as one on a 50 lb plane - except that this thing should be landing a heck of a lot slower than most. Suggestions?

Also, there's another user here that's Building a big U-2. Jack ( Vortex00 ) is building a old-school U-2C type model. He just sent me this pic.