I built a twin rotor 40 size in the late 80s, it was my on design based on the article in RCM (Roto-Falcon).
Once I got used to the flight characteristics it was a lot of fun. The biggest problem I had was with high speed it would try to roll over, but just as it started to roll if you would back off the power it would straiten right up. Last week a friend of mine built a fixed head single rotor (two blade) gyro, I was the test pilot and after we got the tilt angle on the head correct it flew just fine, we thought, several laps around the field, and a touch and go, well almost go it never got out of ground effect, I guess I got behind the power curve, No problem we just put in a new battery, and up again, climb out was fine, slow left turn, oops roll over to the left (slam) gravity bitten. We didn't see any reason why it rolled over, checked it out, and put on a new prop and went again. This time it flew fine left and right turns no problems, a little under powered but it flew. We flew it or I should say attempted to fly several times, and at least one out of three times it would roll over. He is using G-10 FG .040!QUOT! thick as a flapping hinge it may be a little thick. Well I guess I got a little off the subject, but thats my experience with Auto-Gyro's thus far.

I do however fly Planes and Heli's quite well, at least in my on mind.

Randy Wishon

p.s. My flying is much better than my spelling and grammar.