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The primary reason is power. With enough power behind it you can make a rock fly as when you throw a rock. The actual theory of flight is "lift". Airplane wings are designed so that the air going over the top of the wing is moving faster than the air going under the wing. This creates pressure under the wing and causes it to lift. If you take a tape measure and measure the top of a wing and then measure the bottom of the wing you will find that the top measure is longer than the bottom measure. This means the air on top has to move faster to get over the wing on top.

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14y ago

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