Giant unmanned airships that can fly for up to three weeks at a time could soon be providing cover for British soldiers in Afghanistan. The LEMV (long endurance multi intelligence vehicle) is being developed by a team of British and American engineers and will give troops on the ground valuable surveillance information. The helium-filled drone will, when it takes to the skies sometime next summer, become the worlds longest endurance UAV (unmanned aerial vehicle). Packed with reconnaissance systems, the LEMV will be able to operate autonomously at altitudes of around 22000 feet for 21 days at a time, and travelling at speeds of up to 80 knots

Alan Metzger, director for airship programmes at defence firm Northrop Grumman, which received half a billion dollars from the US military for the project, said that the airships ability to stay in the air for long periods make it perfect for surveillance missions. Mr Metzger told The Engineer magazine: This is going to be the longest endurance UAV in the world, its got the ability to stay up for three weeks with unblinking stare. There will be no gaps in the data that gets put down to the war-fighter. I dont know of anything equivalent that could stay up for three or four weeks. The firm claims that the LEMVs skin - a blend of Vectran, Kevlar and Mylar - will be able to cope with a reasonable amount of small arms fire from Taliban fighters on the ground. British engineering firm Hybrid Air Vehicles Ltd is developing much of the key technology behind the aircraft which, officially, is not a true airship. Instead it is known as a hybrid air vehicle (HAV) and it has a number of advantages over fixed-wing UAVS like the Global Hawk.
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