Windsurf,
I recently completed and maidened my HR-3 (Evo .455/ APC 11x7/ elevator and rudder servos mounted in the tail).

You are right about the wind, for there was a 15mph sustained with 25mph gusts on that day. I had added a prop spinner weight for safety's sake, and had several flights with no real issues, adjusting 4 clicks of right trim for ailerons and 2 clicks down for elevators. Rolls, loops and inverted flight were amazingly easy. The wind tended to cause "weathervaning" in the air and on the ground. There was too much wind to test stall characteristics. Luckily, there was only about 15deg of crosswind.

The next day was a different matter, and the winds were a bit stonger. I had removed the nose weight, changed wheels (grass field), and changed throttle linkage. On take-off, the plane rolled hard to the left. I handed the tranny to a more experienced pilot and he managed to get her down. Although the wind was worse than the day before, I re-trimmed and flew several more times with no problems.

I discovered a few days later that the horizontal stab had some recurring warp issues. I thought I had straightened this problem out beforehand, but overnight, the leading edge of the port horiz. stab had taken a warp downward that had gone unnoticed. Since I used heat to straighten, I suspect the heat of the sun and 85+ deg F temps on that day undid my work.

Has anyone else experience this warping problem with this plane or other Seagull ARFs?