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JetZero raised approximately $175 million in Series B financing, led by B Capital with participation from United Airlines Ventures, Northrop Grumman, 3M Ventures, and RTX Ventures. The funds will accelerate the development of its full-size Demonstrator prototype, targeting a first flight in 2027.

JetZero has secured over $1 billion in total commitments and is collaborating with the U.S. Air Force, NASA, and the FAA for an early 2030s commercial service. The Z4 aircraft is designed to deliver up to 50% better fuel efficiency and lower carbon emissions compared to existing airliners, addressing the aviation industry's emissions and fuel-price challenges.