From Electrek: The first battery-powered manned helicopter: 20 minutes flight time with...

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Tier 1 Engineering unveiled the first battery-powered manned helicopter. The engineering firm retrofitted a used Robinson R44 helicopter with two electric motors powered by a large battery pack made by Brammo, the electric motorcycle maker turned battery pack manufacturer, fitted on the underbody of the aircraft.

The vehicle, which completed its inaugural flight just last month, serves as a proof-of-concept and test mule while Tier 1 Engineering develops a more advanced electric helicopter with its partners under the ‘EPSAROD’ development program. more…

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