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Zephyr unmanned aerial vehicle
- Lightweight plane (31kg/ 68lb) is launched by hand
- Flies autonomously and can climb to more than 18,000m (58,000ft)
- By day it flies on solar power and recharges batteries.
- By night it is powered by rechargeable lithium-sulphur batteries
太陽能飛機打破無人飛行紀錄
可在近20公里(58,000 ft)的高空, 飛行54小時
資料來源: BBC
A lightweight solar-powered plane has smashed the official world record for the longest-duration unmanned flight
On the first flight, the aircraft, which has a wingspan of 18m (59ft), flew for more than two days before it developed a fault. The second, shorter flight was curtailed when thunderstorms threatened the propeller-driven plane.
"What was proved - and what was a world first - was that the aircraft was flown using its solar electrical power system through two complete diurnal cycles," said Paul Davey, Zephyr's business development director.
"The aircraft was flown on solar power and charged its batteries during the day, discharged its batteries during the night, and remained aloft the following dawn when the cycle was repeated."
During the flights, Zephyr reached a maximum altitude of more than 58,000ft (18,000m).
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