ANSWERS: 6
  • Did you just post a question and then post an answer to it?
  • Whoa - you're forgetting the laws of relativity. The plane is moving relative to the ground is moving relative to the plane. The plane doesn't lift because nothing's generating lift under the wings. If the wind were fast enough to generate lift under the wings, the plane would take off - not that it would go 'forward' very far. Technically, the ground is moving under the plane because of relativity.
    • Thinker
      lift is not created UNDER the wing but by the shape of the wing a low pressure area ABOVE the wing lifts the airplane from the ground. The wind works on the venturi effect. Air moving faster over the wing than below and the curved surface creates the low pressure required to lift the airplane. If the airplane is stationary on the ground There is no air flow over the wing if the ground is moving under the airplane. No movement, no lift the airplane stays on the ground. I am both a commercial pilot and air frame and power plant mechanic.
  • The motion of the ground is essentially irrelevant. What matters is the motion of AIR relative to the WING. A headwind produces lift and if strong enough, could -- in principle -- lift an airplane vertically. There would have to be at least enough thrust to counter drag, or else it would simply 'blow away' in the gust.
  • Yes it can if the air moves with the ground, Bernoulli's principle applies to lift and if the wind moves over the wings, then the differential in pressure above and below the shape of the wing will lift the craft. If you spin a globe under an aricraft, there will lift created by the wind created by the movement of the sphere. To prove this, spin a globe very fast and put your hand next to it while it is spining, you will feel the air flow from the liberation of wind off the globe as its velocity is great enough to escape the centrifical force of the rotation at the surface. This wind is what would create pressure on the wings to lift the plane.
    • Thinker
      This will not happen in a vacuum no matter how fast the sphere is spinning. Your assumption is mostly correct however.
  • The problem is there's no such thing as "truly stationary". Relativity doesn't allow that. For a plane to take off, the air must pass over the wings with sufficient velocity to cause sufficient lift. If you hold the airplane fixed relative to some celestial reference point, the most likely outcome is that the Earth will either leave the airplane behind as it moves around the sun, or crash into the plane and destroy it. So it's not about holding the plane stationary, it's about making the plane and the air move relative to each other. What experiment did Mythbusters run on this topic?
  • Think wind tunnel. And this has absolutely nothing to do with Quantum Mechanics.

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