It is a circular winged monoplane that currently resides in an Iowa musum (in pieces ), hard to get a better clue than that unless you fine gentlemen are crying Uncle
I was going to jokingly suggest the Leonardo DaVinci replica, but I doubt it's that. I've got an idea I know what it is, but blowed if I can remember what it's called, or where I've seen it !
Initial thought was Republic Seebee, quickly binned that one then thought I'd got it with the Edgley Optica (used to built 10 miles from my house !), but I'm now thinking its a chopper of some sort like a MBB105