Boosted by a research and development grant from Washington state, startup Zunum Aero will construct the prototype powertrain for its planned hybrid-electric small regional airliner. The $800,000 matching grant is the second-largest of five awarded by the state’s Clean Energy Fund. Its size is linked to funding already raised by Zunum from Boeing HorizonX and JetBlue Technology Ventures. Describing the grant as “a significant amount, a significant endorsement and a significant ...


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