The high-altitude powered platform (HAPP) is a conceptual unmanned vehicle which could be either an airship or airplane. It would keep station at an altitude of 70,000 ft above a fixed point on the ground. A microwave power transmission system would beam energy from the ground up to the HAPP to power an electric motor-driven propeller and the payload. A study of the HAPP has shown that it could potentially be a cost-competitive platform for such remote sensing applications as forest fire detection, Great Lakes ice monitoring and Coast Guard law enforcement. It also has significant potential as a communications relay platform for (among other things) direct broadcast to home TVs over a large region.
Applications of a high-altitude powered platform /HAPP/
Lighter-Than-Air Systems Technology Conference ; 1979 ; Palo Alto, CA
1979-01-01
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Applications of a high-altitude powered platform /HAPP/
AIAA | 1979
|High-Altitude Lighter-Than-Air Powered Platform
SAE Technical Papers | 1991
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