Sion Li-S battery pack powers electric UAV on 11-day flight
Green Car Congress
SEPTEMBER 22, 2014
The Zephyr 7 is a solar/battery powered electric UAV with a wing span of 70 feet (22.5 This latest flight was undertaken in the Southern Hemisphere winter so the aircraft had to show it could remain operational through the longer nights, re-charge sufficiently in the shorter periods of daylight and cope with the harsher weather conditions.
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