Aeronautics and astronautics – Aircraft – heavier-than-air – Helicopter or auto-rotating wing sustained – i.e. – gyroplanes
Patent
1982-11-23
1985-05-14
Barefoot, Galen L.
Aeronautics and astronautics
Aircraft, heavier-than-air
Helicopter or auto-rotating wing sustained, i.e., gyroplanes
244 50, 180 141, B64F 104
Patent
active
045167443
ABSTRACT:
A ground handling system for lifting, supporting, maneuvering, and transporting aircraft fitted with skid-type landing gear comprising a dolly assembly of tandem wheel assemblies, a yoke assembly, and a detachable jack assembly. The jack assembly utilizes a modified, standard, hand-operated hydraulic jack mounted on a platform straddling the skid tube to provide over-center lifting force to existing fixed wheel attachment strong points on the skid tubes. An adjustable inverted U-shaped lift member translates the vertical thrust of the piston of the jack below the platform to the skid tube. An adaptor pivotally mounted to the lift member grasps and accommodates unevenly-mounted attachment points. Two jack assemblies are utilized to lift the aircraft generally simultaneously at opposing attachment points which are generally at the plane of the center of gravity of the aircraft. While the aircraft is raised and balanced on the jack assemblies, the two wheel assemblies are placed in tandem under the skid tubes, the rear wheel assembly to the rear of the attachment points and the front wheel assembly under the front portion of the skid tubes. The tandem wheel assemblies provide a wide wheel base for stability and maneuvering. The front wheel assembly has at least two opposing, steerable caster wheels for maneuver which may be locked to facilitate backing up, and the rear wheel assembly has at least two opposing co-axial, fixed wheels with a camber and toe-in configuration to facilitate tracking. The wheel pintles of the rear wheels are elevated above the axle by a connecting flange to provide additional clearance.
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