Ive got to ask: whats the attraction of rc autogyro? Ive never flown one, but it seems like it combines all the worst features of a helicopter/MR with much of the limitations of an airplane. I can see why one would want a full scale (simple/cheap/safe compared to a helicopter). But for rc what makes you guys want one? Honest question.
All of the main features of a helicopter main rotor were developed and first put into production with an autogyro. Your question also ignores the fact that the autogyro was developed to help overcome the stall characteristics of fixed wing aircraft.
Some of us like the flight experience and want to fly all types and historically important designs. Why should someone want to fly a biplane or anything with a propeller when jet aircraft are so good? (A silly question even to me).
Real helicopters still have an Auto-rotation mode, (thank you autogyros), in the event of an engine failure to allow them to land safely without engine power.
Please don't knock the design until you have flown one.
They are a historical category of aircraft that predates functional helicopters by 20 years or so.
With all that I have built, flown, and have yet to an autogyro is one of the 2 aircraft on my bucket list.
Just be content with what you do and allow others to be content with what they do. The sky is big enough for everyone and any RC craft they can get to fly