Sultan,
Your history and memory are both quite fuzzy.
The Osprey is neither "new" nor "revolutionary" but is itself a DERIVATIVE with its roots firmly based in the 1950's. We have been through this many times before with you. Would you mind keeping up with the discussion and not try to describe the situation to suit yourself over and over....something that is itself nothing new or revolutionary.
Bell flew the XV-3 from 1953-1966. Your Osprey is a DERIVATIVE of that if you care to check it.