Anonymous
Anonymous asked in Cars & TransportationAircraft · 1 month ago

can a 747 go up to 60000 feet?

a 747 or 787 or 330 or 350 or whatever like those..

7 Answers

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  • Anonymous
    4 weeks ago

    The service ceiling of a Boeing 747-200 (Air Force One) is 45,100 feet.

  • Fred
    Lv 7
    1 month ago

    No they cannot as the air is too thin to support the lift needed to lift such a  large plane to that altitude.  Only several planes have ever been built to reach that sort of altitude and generally they are purpose built for spy work such as the U2 and the SR71 Blackbird.

  • 1 month ago

    Yes ten by ten.

  • Zack
    Lv 7
    1 month ago

    No. A 747 doesn't generate enough lift to go that high. A 747 is capable of flying at 45,000 feet, but it rarely goes that high unless it's the modified 747 that the U.S president flies on. I remember seeing a post by a former 747 airline pilot a few years ago, and he said that in the many years of being a 747 pilot, he only flew that high a handful of times.

    The highest altitude a passenger 747 will commonly go up to is maybe 39,000 - 40,000 feet. The only passenger jets that could get up to 60,000 feet were the Concorde and the Tu-144.

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  • Anonymous
    1 month ago

    Short answer - NO they cannot go that high. Next time, you can consult Wikipedia and get the performance specs on almost any airplane. 

  • 1 month ago

    No.

    The higher a plane flies, the faster it has to go in order to have a suitable equivalent airspeed. At 45000 feet, flying at Mach 0.8 is aerodynamically equivalent to flying at merely 202 knots at sea level, which is not much higher than the stall speed at zero flap.

    The issue is that the thrust of a high bypass engine goes down with altitude, and flying faster is not really possible unless much large engines were fitted.

    But there is also an issue of buffet. Flying so close to the stall speed, and at the maximum the plane is capable of, and close to the speed of sound means that several phenomenon combine to crate vibrations. Subsonic jetliners are thus having a narrower flight envelope as they gain altitude, being stuck between a rising stall speed and a lowering buffet limit, all this with a reduced thrust capability.

  • 1 month ago

    No. The Concorde was the only passenger jet to fly anywhere near that high. Depending on the variant you're talking about, the maximum service ceiling of the 747 is about 45,000 feet. And they are rarely flown above 35,0000 feet or so; it's just not economical.

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