Crappy Day!

Took the bird to the local flying club field. Whirlwinds members mainly fly airplanes, so this was something new and I knew it would draw attention. Went to the edge of the field to stay out of the way of the airplanes. With the wind at my back, I tried to lift off of the short grass. The heli kept wanting to rotate as the wind was causing it to weathervane to side in. Also, the slight vibration was causing the collective to jump up and down about 2 feet. Flew some circuits then I had to land numberous times to adjust the tracking and to eliminate the vibration. Finally, the heli tried to rotate right, so I held a little left rudder (tail motor). Suddenly, the heli rotated around about 2 to 3 times quickly to the left. Barely got it under control and set it back down. Went home to tweak on it.

Home. Cannot find source of slight vibration. Balanced blades again, measured flybar to verify it was centered, checked flybar carrier, mainshaft, slide block mounting. NO vibration with the blades off, slight with them on. Even tried pieces of tape on either blade. With the vibration nearly gone, I went outside, began to fly when it again rotated quickly around 3 times + and I couldn't stop it. I think it went clockwise, which means the tailrotor was at full power. (again, it wanted to go left, so I added a little right) Lost it. Throttle down, flip off idle-up, watch dead chicken dance. Really pissed me off, so I put it up for a while. WHAT HAPPENED TO MY SMOOTH FLYING HELI? ARGH...
[:@][:'(][:-]