Lv 4
Vahe asked in Cars & TransportationAircraft · 2 months ago

What are the odds of Boeing constructing a 400 passenger airliner that uses scramjets to attain speeds up to Mach 7?

Supersonic airliners have been a thing of the past for almost two decades, but the success of scramjet-powered aircraft tests in 2004 and 2010-2013 raises hopes about scramjet technology being applied to a passenger aircraft that could carry 400 people and fly as fast as Mach 7. Building such a machine will require a lot of private capital from SpaceX and institutions like the Chabot Space, Aerojet, and Science Center, but will result in a giant supersonic airliner that can fly in the Mach 3.0-7.0 speed range powered by hydrocarbons without creating sonic booms or polluting the atmosphere.

18 Answers

  • 1 month ago
    Favorite Answer

    Better would be a sub orbital plane.   Take off from New York City,   climb fast,  go ballistic then coast to the other side of the world and land as a glider in Melbourne.   Total flight time would be 3 hours.  

  • david
    Lv 5
    1 month ago

    Next to nil. Scram jets would eat too much fuel below optimal flight alt. Then there are issues of maneuverability and emergency diversion. That all assumes that the airframe can handle cycles at the temperatures that M1+ will produce. 

  • Anonymous
    1 month ago

    About the same as AOC's train to hawaii

  • 2 months ago

    I'd say ZERO. There's no demand for it, and the economics are astonomical.

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  • 2 months ago

    About the same as AOC's train to hawaii

  • 2 months ago

    What about supersonic subways? What about teleportation?

  • 2 months ago

    Zero. There's no possible market that could cover even 10% of the costs.

  • 2 months ago

    You might be able to build the scramjets to produce that speed, but you could never produce and airframe that could handle those stresses.  

  • Zack
    Lv 7
    2 months ago

    Almost zero.

    It's possible that there will be commercial scramjets sometime in the next several decades, but scramjet airliners that carry 400 people? That sounds completely unlikely. Not only would it be ridiculously complex to have a 400 passenger jet capable of mach 7, but also:

    1. It would be very expensive.

    2. Companies are going to want to build airliners that are capable of filling up to full capacity. If you build a 400 passenger scramjet airliner, it will never get anywhere near full.

  • 2 months ago

    Essentially zero.

    Why don't you read the demonstration on how unlikely merely supersonic transport for the masses is:

    Scramjet is doubly doubtful (which is somewhat weird for me to state as double zero is still zero) as supersonic since scramjet need ADDITIONAL engines to get to the speed where scramjet could operate. And then would need a mechanism to stow those high subsonic/low supersonic capable engines from hypersonic flow.

    No one has pockets deep enough to make an aircraft that complex which would never sell in adequate numbers to make up for the investment.

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