Boom Supersonic said it has designed a new propulsion system to power its Overture supersonic jet, which it says will be the world’s fastest airliner when it launches in 2027. The propulsion system, which it calls Symphony, would be a “bespoke design leveraging proven technologies and materials”, according to Boom, which added the system would “operate at net zero carbon” and would meet noise level requirements under US law. The system would also reduce engine maintenance costs and mean a 25% increase in “on wing” time, said Boom. “We can provide our customers with an economically and environmentally sustainable supersonic

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