The dream of eternal sun plane
Clean, flying high, eternal
Even we call it a dream, it is actually not a pointless dream anymore.
The sun plane zephyr has been staying in the sky for seven days. It was planned to stay for over months. Zephyr was developed in 2003, tested in 2005, flying 54 hours in 2007, made by British defense company QinetiQ, source.
The goal of zephyr is to make a low cost, high altitude, long endurance,and unmanned aerial vehicle (UAV).
The clean energy powered plane has following parameters, source:
Weight: 30Kg, how lightweight it is!
Flying altitude: over 60,000 feet, 2 times higher than Boeing 747 flying altitude
Zephyr is also in the BBC documentary, Britain’s Secret Engineers, source.