This helicopter, which proved to be a commercial success, had made use of a revolutionary hingeless main rotor composed of fibreglass, which was developed by German engineer Ludwig Bölkow.
Este aparello, que tivo un gran éxito comercial, usaba un revolucionario rotor principal sen bisagras composto por fibra de vidro, que fora desenvolvido polo enxeñeiro alemán Ludwig Bölkow.