Pathfinder-Plus on a flight over Hawaii in 1998.
EC98-44621-3
Pathfinder-Plus on a flight over Hawaii 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