The final version of this vehicle, comprised of a large wing, pilot nacelle and double-skinned airfoil, was flown by cyclist and hang-glider Bryan Allen.
About 170 posts may go at the Airfoil Technologies International factory in Codnor, Ripley and around 100 positions are threatened at Celanese chemicals in Spondon.
Over the past five years the Russians developed a prototype of a vertical axis wind turbine with an innovative airfoil that enables the turbine to self-start.