04114837 is referenced by 13 patents and cites 13 patents.

An air lifting vehicle includes, inter alia, a main frame containing an engine, a helicopter-type rotor driven by the engine, a rear located propeller which provides torque compensation for the rotor as well as yaw control for the vehicle, and a pilot's cabin. Attached to the frame through a plurality of outwardly extending truss members is a keel structure which includes a circular truss section essentially coaxial with and positioned above the rotor and other generally triangular or rounded triangular truss sections attached fore and aft of the circular truss section. Balloon members including fore and aft generally triangular Forlanini envelope sections are secured to the keel and laced together at the center to define a circular opening or duct above the rotor. A pair of forward thrusting propellers are driven by an auxiliary engine carried in the frame and are gimbaled in the elevational plane for pitch control of the vehicle. A pair of inflatable air ballonets is carried in each envelope section which are independently inflatable and deflatable to assist in pitch control. They also progressively deflate at increasing altitude to permit the lighter-than-air gas in the envelopes to expand. Suitable landing wheels and an air cushion pad are provided for landing and for supporting the vehicle on the ground. A second embodiment having a much larger payload includes a pair of fore and aft positioned rotor and engine units with corresponding circular openings in the envelope structure serving as ducts for the rotors.

Title
Air transport and lifting vehicle
Application Number
5/780933
Publication Number
4114837
Application Date
March 24, 1977
Publication Date
September 19, 1978
Inventor
David G McIntyre
Mount Vernon
WA, US
Vladimir H Pavlecka
Newport Beach
CA, US
Agent
Robert C Smith
Assignee
Skagit Corporation
WA, US
IPC
B64B 1/34
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