Hi, this is my first post.
I have to apologise for not reading everything in the Autogyro section first - & I know that I'm going to use the wrong terminology for nearly everything... Sorry.
I owned a kind of autogyro model kite when I was 10 - it was a lot of fun - it may still be hanging up where I left it in the telephone wires. I did a lot of general aeromodelling & design until exams and life got in the way.
Since then I've made various rough & ready magnus/flettner kites with varying degrees of success. Mainly for lift @ minimum complexity, but also with an eye on maximum stability for a hands-off kite-driven boat.
The main reason I didn't get around to rotating blades is that I doubt that rough & ready would be good enough, not to mention the multiple hinges (or elastomers) needed to cope with buffeting?
Anyway, to cut to the chase, I have various crazy ideas - the problem with the Internet is that it's really, really poor at listing failures - especially in the more 'exotic' areas of engineering.
For now I'm asking #1 - if anyone has tried autorotating a ringed rotor? Possibly made from thin metal with 5-10% foam aerofoils stuck (under) flat metal blades?
And #2 - if existing concentric twin rotors are sort of like a biplane, then are triplanes, even quads feasible? & could those multi-'wings' also be fixed in a matrix of 3, 4 or more?
If any of these gets too heavy for a kite, I'd still be interested in bolting them to a mast and sailing it.
I hope this isn't all schoolboy errors.
Regards.