A Nevada-based aviation company is exploring a creative way to utilize gravity as a power source to produce an aircraft concept which might one day take people and cargo great distances without the need for fuel. The project is called the GravityPlane.The idea sprung from the brain of Robert D. Hunt, a theoretical physicist. It uses a cycle of climbing and descending to maintain its lift and forward speed, mimicking the behavior of the bodies of warm and cold air which make up the weather.
For the GravityPlane to become airborne, gas bags inside a pair of rigid, zeppelin-like structures are filled with helium from storage tanks inside the vehicle. Overall weight by releasing the stored air which acts as ballast. Once the craft reaches the altitude where the helium is no longer lighter than the surrounding air– theoretically as high as ten miles up– it is unable to climb any further. Some of the stored compressed air is then expanded into the dirigible areas, decreasing the buoyancy effect of the helium and starting the aircraft's descent phase.As gravity pulls the plane towards the earth, the long wings are moved to the swept-back position to reduce wind drag, and air turbines mounted on the top of the craft capture some of the forward momentum and use it to drive air pumps which can refill the on-board compressed air storage tanks. In this gliding mode, the aircraft achieves aerodynamic lift for a gradual descent at high speeds, and can travel in this configuration for about 400 to 600 miles. At the end of the gliding phase, the wings are redeployed. If the concept ever leaves the drawing board and becomes a prototype, it will be massive. But hypothetically, this design could allow the aircraft to travel practically any distance with no fuel. It would expel no polluting gasses, and it would be virtually silent. It would also have some interesting features for such a large craft, including vertical take-off and landing (VTOL), and the ability to set down on land or at sea. Additionally, its buoyancy would allow it to hover in the air if needed, even in the event of total power loss.
For the GravityPlane to become airborne, gas bags inside a pair of rigid, zeppelin-like structures are filled with helium from storage tanks inside the vehicle. Overall weight by releasing the stored air which acts as ballast. Once the craft reaches the altitude where the helium is no longer lighter than the surrounding air– theoretically as high as ten miles up– it is unable to climb any further. Some of the stored compressed air is then expanded into the dirigible areas, decreasing the buoyancy effect of the helium and starting the aircraft's descent phase.As gravity pulls the plane towards the earth, the long wings are moved to the swept-back position to reduce wind drag, and air turbines mounted on the top of the craft capture some of the forward momentum and use it to drive air pumps which can refill the on-board compressed air storage tanks. In this gliding mode, the aircraft achieves aerodynamic lift for a gradual descent at high speeds, and can travel in this configuration for about 400 to 600 miles. At the end of the gliding phase, the wings are redeployed. If the concept ever leaves the drawing board and becomes a prototype, it will be massive. But hypothetically, this design could allow the aircraft to travel practically any distance with no fuel. It would expel no polluting gasses, and it would be virtually silent. It would also have some interesting features for such a large craft, including vertical take-off and landing (VTOL), and the ability to set down on land or at sea. Additionally, its buoyancy would allow it to hover in the air if needed, even in the event of total power loss.
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