Altaeros Energies’ innovative airborne wind turbine (AWT) uses a helium-filled, inflatable shell to ascend to high altitudes, where winds are more consistent and up to five times stronger than those reached by traditional tower-mounted turbines. Strong tethers hold the AWT in place and transmit electricity down to the ground. “The lifting technology is adapted from aerostats, industrial cousins of passenger blimps that for decades have lifted heavy communications and radar equipme....

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