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JetZero has raised $175 million in Series B funding, led by B Capital, to advance the development of its all-wing Z4 aircraft prototype, with a first flight planned for 2027. The company, which has secured over $1 billion in total commitments, aims to achieve commercial service in the early 2030s in collaboration with the U.S. Air Force, NASA, and the FAA, targeting a 50% improvement in fuel efficiency and reduced carbon emissions compared to current airliners.