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Originally Posted by cvetter
Airplanes "crab" into the wind. In other words, the airplane thinks it is always going straight into the wind. A flag on the nose would always point directly towards the tail.
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Airplanes tend to crab into the wind because of the tail at the end.
But a flag on the nose would not always point directly aft ...
Gliders, TF9 Cougars, U2s, Tomcats all have or had yaw strings to see if they are heading straight into the wind or not.
On a Harrier, there's a vane on a small mast (couple of inches high) in front of the canopy.
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Except rare times, like when landing and taking off, airplanes do not feel side winds.
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Depends on what you mean by "do not feel".
Unless corrected, aircraft get pushed aside by many miles due to sidewinds.
But the pilots generally won't physically feel it.