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by PokerPaul on June 29th, 2005

PokerPaul

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If anti-gravity machines don't (yet) exist, then how do airplanes defy gravity?

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Answers. 10 helpful answers below.

  • by FLYxNIGHT on March 3rd, 2007

    FLYxNIGHT

    Airplanes don't defy gravity; what they do is use other forces to counteract the effect.

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  • by nimmi on February 25th, 2008

    nimmi

    If you carefully watch the curves of the wings of the plane ,you will notice that upper part is bit more in length than the lower part.
    If we release 02 paricles at the same time in front of the wing ,one particle to take route of upper part of the wing & another to take route of lower part of the wing & both particles are to meet at the same time at the back of the wing.
    Then for the same time period distance covered by the upper paricle is more,it means it had greater velocity than the lower one.where the velocity is higher pressure is low.
    So the pressure gets high at the lower part of the wing due to less speed & in the upper part pressure gets low due to high speed of wind.
    This pressure difference is called drag & causes lift of the plane.
    If speed of the plane is reduced or came down from a certain value this pressure diff will come down & stall the plane.---- Jet planes also work on action & reaction principle. --So planes do not defy the gravity. You are working against the gravity through mechanical means.

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  • by Cantras on February 24th, 2008

    Cantras

    They don't- they'll always come down, and they have to push against gravity to work. To defy gravity, they could just go up without effort.

    If you're actually interested in how, take a piece of paper up to your lips and blow straight *over* it. It'll rise up, because the fast-moving air is low pressure. it doesn't push down as much as the air below the wings pushes up.

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  • by Quirkie on July 4th, 2005

    Quirkie

    Good question. An aeroplane is an anti-gravity machine of a sort, using lift from air pressure differences to counter-act gravity, but what engineers really mean by anti-gravity is a "reactionless drive" - a way of accelerating without throwing something away behind you (like rockets and aeroplanes) or making use of friction (like cars).

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  • by Galeanda on February 25th, 2008

    Galeanda

    They don't defy it....they Use it.

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  • by Anonymous on February 24th, 2008

    Anonymous

    in the science of harry potter you can see some artile about anti-gravity

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  • by Max Power on March 3rd, 2007

    Max Power

    Giant magnets placed strategically throughout the planes wings and body give it the push it needs to defy gravity.

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  • by -O-uknow on March 3rd, 2007

    -O-uknow

    They create high pressure below and low pressure above for lift.

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  • by PrivateGomerSpooner on January 9th, 2010

    PrivateGomerSpooner

    And having two turbines under each wing also helps.

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  • by garth007 on January 9th, 2010

    garth007

    The Bernouilli Principle. Faster moving air, which flows over the top of the curved airplane wing, creates a lessening of pressure on top of the wing...which gives x amount of lift depending on the speed of the aircraft through earth's atmosphere.

    Air is a medium which can flow like water, therefore the Bernouilli Principle applies.

    Space-time is a medium which can flow like water as well.

    A 'magnetic field' is an 'ether vortex' created by the aligned molecular domains in a magnet.

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