What about the supposed aiming modifications when firing a weapon? According to my research, when firing a weapon you are supposed to aim a little to the right when firing northwards and to the left when southwards. This is supposed due to the rotation of the earth. If that is so, it means that the moment the bullet leaves the gun it no longer moves according to the rotation of the earth.
By logic and common sense, the same behavior must be expected when planes leave Earth. Does Earth rotation effect planes?
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Qmechanic
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The effect you describe is known as the Coriolis effect. Actually, a projectile will appear to veer to the right (on the Northern hemisphere) regardless of the direction in which it is fired - North or South - so your initial statement of the problem is wrong.
As for planes, they move relative to the air; so while there is a nominal Coriolis effect, it can safely be ignored; the motion of the air (which can move at over 100 mph in the jet stream) dominates the corrections you have to make.
Floris
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