There is a need to advance it in some ways. Therefore we are trying to design it in a sturdy and strong in its construction and make an authentic arrangement that will really stay up above for months.
The test continued going on between 28 and 31 July. UK Ministry of Defense remained involved in that experiment. The 30kg Zephyr was operated by remote control. It made a flight at the height more than of 18km (60,000ft). It continued flying on autopilot and thru satellite communication. It tried out a communications load having a weight about 2kg.
At first glance, the propeller-driven Zephyr appears to be exactly some other model aircraft. It is even set up by hand. This “pilotless” craft with its 18-metre wingspan contains best available technologies.
Its construction employs ultra-lightweight carbon-fiber material. The aircraft continued flying on solar power – produced by amorphous silicon solar panel – thin as sheets of paper. These are pasted over the vehicle’s wings by glue.
To work in the night, the propellers are provided energy from lithium-sulphur batteries. These batteries are filled up with energy throughout the day under sunlight. Much of work is required for power storage and light-weighting down the arrangements,” told by Mr. Kelleher. He said that Lithium sulphur is advantageous for its energy density. It is more than double as compared to the most beneficial substitute technology – lithium polymer batteries.
Zephyr has proved that it can withstand in the extremes of temperature. It was tested in the very hot 45C heat at the surface level in Arizona’s Sonoran Desert and also to the minus 70C at heights of more than 18km (60,000ft).
The technologists from the Farnborough-based company are at present cooperating with the American aerospace jumbo Boeing. Their joint collaboration is on a defense project codenamed Vulture.
This would see the largest plane in history go for the sky. The energy provided by the sun. It would be able of containing a 450-kilo (1,000lb) load. QinetiQ is also preparing UAV technology for non-military uses.