Pathfinder-Plus on a flight over the Hawaiian island of N'ihau in 1998.
EC98-44621-252
Pathfinder-Plus on a flight over the Hawaiian island of N’ihau in 1998. The goal of the flights was to validate new solar, aerodynamic, propulsion, and systems technology developed for the Pathfinder’s successor, the Centurion/Helios Prototype, which was designed to reach and sustain altitudes in the 100,000-foot range.17 June 1998NASA Photo / Nick Galante› Pathfinder-Plus Project Description