Supersonic jet startup Boom's future is in doubt after every major jet-engine maker refuses to help

According to FlightGlobal, engine manufacturers are not eager to assist Boom in developing a supersonic powertrain

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The remarks follow Rolls-Royce's September announcement that its relationship with Boom was coming to an end

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Boom may have its own engine, according to travel expert Henry Harteveldt, which could be advantageous

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It's possible that Boom Supersonic will have to build its own engine for the extremely quick Overture jet

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Boom and engine maker Rolls-Royce entered into a "engagement arrangement" in 2020

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To investigate a potential engine for the Overture

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which has orders from American Airlines and United already

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GE previously worked on the Affinity engine that was being developed to power a supersonic jet

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