U.S. Patent Specifications

In an aircraft of the rotary wing type, a suspension rig, a rotatable wing assembly comprising a plurality of blades of aerofoil cross‐section rotatably mounted on said suspension rig adapted to lift said aircraft when said wing assembly is rotated, each of said blades having at least one jet orifice along its trailing edge, a series of rocket units and a manifold common to all rocket units integrally mounted upon said rotatable wing assembly, solid‐fuel rocket charges within said rocket motors, fluid conducting passages connecting the common manifold with the jet orifices in the blades, and means for igniting and expending said solid‐fuel rocket charges in sequence.