×

Helicopters with coaxial rotors, of convertible type in particular

  • US 4,123,018 A
  • Filed: 05/16/1977
  • Issued: 10/31/1978
  • Est. Priority Date: 01/12/1976
  • Status: Expired due to Term
First Claim
Patent Images

1. Improvements to helicopters with coaxial rotors of convertible type in particular, consisting of at least two contra rotative rotors carrying blades having a coating for lifting and propelling, the fuselage having an axis common with the axes of the rotors and rocking jointly with the latter between substantially vertical and horizontal positions, improvements wherein each rotor consists of a nave carrying blades radially arranged, and said blades being movable in incidence and cyclically controlled and further comprising,a shaft coaxial with said fuselage axis inside said fuselage forming a structural member of said fuselage,and means for supporting the rotor naves axially displaced along and rotatable about said shaft,said helicopter being free of fixed wings with said rotors being the sole means for providing lift when said fuselage is vertical and horizontal in flight,propulsive transmissions and flight control systems external to said shaft,engine means axially displaced from said shaft inside said fuselage embracing the common axis of said shaft and fuselage coupled to said propulsive transmission for providing driving power to said rotors,wherein the incidence of the blades coating is driven by two cyclic plates located between the rotors and related to each of said rotors.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×