Seibel and Cessna helicopters

Seibel S-3 1947 Each of the two blades was attached to the rotor hub by means of a ... read more ... Seibel first worked with Bell in Arthur Young's team when it was putting the finishing ... read more ... Seibel S-4 1951 Cessna H-41 "Seneca" 1954 The Cessna Aircraft Company was founded by Clyde Cessna, who even before World War I ... read more ...