bn:17392492n
Noun Named Entity
Categories: Unmanned aerial vehicles of the United States, NASA aircraft, Solar-powered aircraft, Aircraft first flown in 1999, AeroVironment aircraft
EN
AeroVironment Helios Prototype  Helios aircraft  Helios Prototype  NASA Helios
EN
The Helios Prototype was the fourth and final aircraft developed as part of an evolutionary series of solar- and fuel-cell-system-powered unmanned aerial vehicles. Wikipedia
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EN
The Helios Prototype was the fourth and final aircraft developed as part of an evolutionary series of solar- and fuel-cell-system-powered unmanned aerial vehicles. Wikipedia
NASA developed solar and fuel-cell-system-powered unmanned aerial vehicle Wikidata