lehpron
Posts: 6846
Joined: Tue Jul 10, 2001 3:42 am

Be Hypothetical: Sonic Routes?

Mon Nov 28, 2005 3:27 pm

As topic line, assume most or all technical aspects have been solved or are have minimal impact. For example:

  • A hypersonic Mach 20 (5.8 km/s) flight from LAX - HKG with engines shut off and coasts in a projectile flight until destination, how many flights/day, how many pax? Sounds be pretty efficient, IMO. Thought it would probably take 20 minutes and 2000 miles just to get up to speed...


  • Or how about a transsonic lowboom M1.5 flight from SFO-ORD?


  • Pick a speed, pick a route, pick a carrier, I want to see what you folks can come up with.

    [Edited 2005-11-28 07:28:52]
    The meaning of life is curiosity; we were put on this planet to explore opportunities.
     
    lehpron
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    RE: Be Hypothetical: Sonic Routes?

    Mon Nov 28, 2005 4:07 pm

    Regardig hypothetical M20 flight:

    From a R&D sense, going one-fourth as fast, 60 miles per minute, would render the flight being twice as long. I don't see the point of going near orbital for commercial flights within planet Earth. In fact, if a plane had the same range capability as 788 but with twice the speed, that plane would sell like hot cakes, IMO.

    So I ask where would something like that fly?
    The meaning of life is curiosity; we were put on this planet to explore opportunities.
     
    centrair
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    RE: Be Hypothetical: Sonic Routes?

    Mon Nov 28, 2005 4:35 pm

    NRT to anywhere JL would want to fly them. They originally ordered (I think) the Concorde. Of course NH would follow suit.

    SQ would do it first and fly it SIN-NYC and anywhere else it wanted to.
    Personally I would like to see NGO-DTW in NW colors. 11 hours down to 1. I could go home every weekend.
    Yes...I am not a KIX fan. Let's Japanese Aviation!
     
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    EGTESkyGod
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    RE: Be Hypothetical: Sonic Routes?

    Mon Nov 28, 2005 9:27 pm

    Gotta say that the London to Sydney, or anywhere in Europe to Australia could be a valid routes. Fair to say it wouldn't be used on any of the "shorter" flights, eg transatlantic flights, not at Mach 20, anyway.

    I would like to see a SUPERsonic airliner again in the near future, before we even think about HYPERsonic!!
    I came, I saw, I Concorde! RIP Michael Jackson
     
    Glom
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    RE: Be Hypothetical: Sonic Routes?

    Mon Nov 28, 2005 9:36 pm

    Mach 20? That's faster than Columbia was travelling when it broke up!
     
    md80fanatic
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    RE: Be Hypothetical: Sonic Routes?

    Mon Nov 28, 2005 10:07 pm

    A hyper-sonic (sub-orbital) flight from LAX-HKG would need to launch (and travel eastward) for better fuel economy. It would probably take twice the fuel to attain a projectile-like flight to the west (against the Earth's rotation). The "long way" would still be much much faster than anything you can imagine...maybe less than 2.0 hours gate to gate.

    Airlines who could do it? Heck I dunno.....you guys and gals are the business people.  Wink

    In the late 70's early 80's, it was projected that we would have these type of transports after the turn of the century. I wonder what happened?

    Same time frame....it was also projected that shape-memory alloys (metals that change shape predictably, with changing temperature) would find their way into aviation (like a airfoil that changes shape to match it's thermal environment)? I wonder what happened?
     
    lehpron
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    RE: Be Hypothetical: Sonic Routes?

    Tue Nov 29, 2005 5:40 am

    To me, a low hypersonic M5-8 is more reasonable for transports than in the teens or more; half my concentration is there. I'm not an advocate for spaceplane-ism.

    Interesting replies folks, especially no American carriers or the now [in]famous EK and their obcession with widebodies... Wink

    Quoting EGTESkyGod (Reply 3):
    I would like to see a SUPERsonic airliner again in the near future, before we even think about HYPERsonic!!

    You know there is talk of skipping supersonic straight to high-hypersonic to bypass the sonic boom issue, I don't see the logic. Any aircraft leaving a traditional airport will have to accelerate above suburbia before it gets high enough for the boom to become negligible. Without any low-boom technology researched, IMO, there is no point.

    I'm an advocate for low-boom technology, the other half. Big grin
    The meaning of life is curiosity; we were put on this planet to explore opportunities.

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