(The highest altitude achieved by a propeller aircraft is 96,863 feet, reached in 2001 by Helios, a direct descendant of Pathfinder-Plus.) NASA developed Pathfinder-Plus with AeroVironment ...
The airship "floated silently" from its "WW2-era hangar" at Nasa’s Moffett Field near San ... 12 electric motors and capable of up to 75mph, Pathfinder 1 is 124.5 metres (408ft) in length ...
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