The idea that an airplane can fly endlessly carrying heavy loads of passengers and cargo without burning any fuel, can stop and hover in place weightless at any time, and can take off and land vertically is a radical departure from accepted thought concerning aviation. This new reality that is made possible by the invention of Robert Hunt's astounding new hybrid aircraft is Hunt Aviation’s vision of the future of aviation. Our aircraft is a rigid glider made of lightweight composite materials.
The new hybrid “gravity-powered aircraft” is formed by merging the capabilities of the following devices into a single new aircraft apparatus: (1) an aircraft capable of aerostatic (lighter-than-air) lift to gain altitude; and, (2) a glider aircraft capable of aerodynamic lift, having a high glide ratio to accomplish long range gliding; and, (3) an innovative new extremely low drag vertical axis wind turbine that is capable of harnessing the force of the wind to generate power as the aircraft glides upward via positive buoyancy and glides downward via gravity acceleration.
Robert D. Hunt, the Chairman of Hunt Aviation, has filed for international patent protection for an innovative new phase change hybrid airship design powered by the thermal energy in the air. The energy to power gliding flight is obtained from the atmosphere itself. An efficient power cycle is created using the natural temperature difference from a low altitude to a higher altitude. Heat energy is taken from ambient temperature air at a lower altitude to power the Gravity Plane and heat is rejected to colder air at high altitude to complete the power cycle. This Atmospheric power cycle can be repeated indefinitely to allow the craft to stay aloft virtually forever.
A proprietary low-boiling-point-liquid is vaporized into a low density lighter-than-air lifting gas using the heat in the air near the surface. This creates buoyancy that allows the buoyant aerostat to upward glide. The air becomes very cold when high altitude is reached and the lifting gas is cooled and changes phase to high density liquid that is heavier-than-air. Lift is lost and the aircraft glides back down toward the surface where the Atmospheric Power Cycle is repeated as the low altitude warmer air vaporizes the liquid back into a lifting gas to create lift again. Phase change is performed by heat exchangers that take in heat or reject heat to the atmosphere.
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