AMPHIBIAN SNOWPLANE Russian patent published in 2000 - IPC

FIELD: transport engineering. SUBSTANCE: amphibian snowplane is designed for negotiating snow covered terrains and moving along water. Proposed amphibian snowplane has body-boat, steering gear and brakes and coaxial tractor propellers driven by engine. Propellers are set at negative angle of incidence relative to oncoming air flow. Coaxial propellers can be furnished with misalignment automatic device and collective and differential pitch mechanisms. Ski supports can be mounted on replaceable beams for moving along snow-covered areas. It is expedient to mount floats instead of beams for moving along water. Propeller thrust reverse is to be used for braking. EFFECT: increased cross-country capability of amphibian snowplane, reduced fuel consumption, improved reliability and efficiency of control. 4 cl, 3 dwg