Boosted by a research-and-development grant from Washington state, startup Zunum Aero is moving into construction of 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 proportionate to funding already raised from Boeing HorizonX and JetBlue Technology Ventures. Describing the grant as “a significant amount, a significant endorsement and a ...


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