Thanks for your confirmation of my thesis Ninthace. Autogyros enjoyed a brief period of popularity in the thirties followed by over 50 years of oblivion punctuated by a few die hard enthusiasts. I flew one of the more capable models for a few years and remain not terribly convinced by the whole concept. They look great but compared to a 600kg ultralight I don’t believe they are competitive, cost and performance wise and the safety record is nothing to write home about either.