The original soda straw body H-4 tested 2 contra-rotating rotors in tandem to determine if gyroscopic forces would cancel out and the rotors could maintain a steady nose forward glide. Both objectives were met, paving the way to construct the H-5.
The original soda straw body H-4 tested 2 contra-rotating rotors in tandem to determine if gyroscopic forces would cancel out and the rotors could maintain a steady nose forward glide. Both objectives were met, paving the way to construct the H-5.