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Flight Reaches 801 MPH Jet Stream

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  • Registered Users Posts: 7,866 ✭✭✭munchkin_utd


    A Virgin Atlantic flight from Los Angeles to London peaked at a whopping 801 mph Monday evening 35,000 feet over Pennsylvania. "[N]ever ever seen this kind of tailwind in my life as a commercial pilot," tweeted Peter James, a jet captain.


    https://www.washingtonpost.com/weather/2019/02/19/flight-reaches-mph-furious-jet-stream-packs-record-breaking-speeds/?noredirect=on&utm_term=.79a92e2d5f7a
    thats a whopping 1289.08 km/h in non UK/ USA measurements.

    jesus, thats fairly moving along.


  • Closed Accounts Posts: 7,070 ✭✭✭Franz Von Peppercorn


    Isn’t that supersonic?


  • Registered Users Posts: 16,657 ✭✭✭✭banie01


    Isn’t that supersonic?

    Yep, one would wonder what the effect of a tailwind assisted speed would have on Mach number and compressibility?


  • Closed Accounts Posts: 152 ✭✭Simple_Simone


    Isn’t that supersonic?

    From the linked Washington Post article:
    ... you might notice something suspect about the 801 mph reading — it’s above the speed of sound (767 mph). However, whether air travel breaks the sound barrier is dependent on its airspeed — not its ground speed .........................

    In other words, an airspeed exceeding the speed of sound was not attained. Commercial aircraft are generally not designed to fly at supersonic speeds.


  • Registered Users Posts: 644 ✭✭✭faoiarvok


    banie01 wrote: »
    Yep, one would wonder what the effect of a tailwind assisted speed would have on Mach number and compressibility?

    The aircraft is moving in a stream of air that is moving in (generally) the same direction as it, so the true airspeed is basically the ground speed minus the tailwind.


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  • Registered Users Posts: 6,189 ✭✭✭crisco10


    faoiarvok wrote: »
    The aircraft is moving in a stream of air that is moving in (generally) the same direction as it, so the true airspeed is basically the ground speed minus the tailwind.

    but what if its on a treadmill? ;);)


  • Registered Users Posts: 5,872 ✭✭✭Chris_5339762


    Or what if everyone jumped just as it was about to land


  • Registered Users Posts: 8,219 ✭✭✭Gaoth Laidir


    Nothing to see here. It happens regularly over the Atlantic. This is just referring to the New York area and is therefore a nice piece of clickbait.

    The title of the thread is very misleading and implies the jet stream was 801 mph. That's Jupiter-esque.


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