Zephyr is a High-Altitude Long-Endurance (HALE) Unmanned Aerial Vehicle (UAV) made of ultra-lightweight carbon-fibre. It flies on solar power generated by amorphous silicon arrays covering the aircraft’s wings, no thicker than sheets of paper. It is powered day and night by rechargeable lithium-sulphur batteries that are recharged during the day using solar power. On 9 July 2010, Zephyr was launched at 0641hours and set three new world records. They are currently awaiting ratification by the Fédération Aéronautique Internationale and were: The absolute duration record for an Unmanned Air Vehicle of 336 hrs and 22 minutes (14 days and 22 minutes). The duration record for a UAV (in the U/1.c / 50-500Kg category) – time as above The absolute altitude record for a UAV (in the above category) – of 70,740 ft (21,561 m) The flight took place above the US Army's Yuma Proving Ground in Arizona and the aircraft was landed on the morning of 23 July having achieving all the objectives of the trial.