Method and device for launching aerial vehicles
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United States of America Patent
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May 12, 2009
Grant Date -
Dec 14, 2006
app pub date -
May 20, 2004
filing date -
May 30, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A heavier-than-air air vehicle, particularly a long endurance, solar powered, unmanned aerial vehicle (UAV) intended for “perpetual” flight within the stratosphere, is carried to its operational altitude suspended on a tether from a helium balloon. The tether is attached at or towards a tip of the UAV's wing so that it is carried in effectively a 90° banked attitude. At the desired altitude the UAV's powerplant is started and it flies on its tether in an upwardly-spiralling path relative to the balloon until a level or near level attitude is attained, when the tether is released and the UAV is permitted to assume free flight.
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