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Helios Prototype crew chief Marshall MacCready of AeroVironment, Inc., carefully monitors motor runs during ground checkout of the solar-powered flying wing prior to its first flight from the U.S. Navy's Pacific Missile Range Facility on Kaua'i, Hawaii.

Helios Prototype crew chief Marshall MacCready of AeroVironment, Inc., carefully monitors motor runs during ground checkout of the solar-powered flying wing prior to its first flight from the U.S. Navy's Pacific Missile Range Facility on Kaua'i, Hawaii.

Photographer NASA/Nick Galante
Helios Prototypesolar-poweredAeroVironmentfunctional checkoutU S Navy s Pacific Missile Range FacilityKaua iHawaiiGround crewMarshall MacCready