Originally posted by Evan
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Let me go again:
1- You start from zero sideslip
2- Suddenly apply rudder to the stop (but don't need to exceed 300 lb of force on the pedal)
3- Keep full rudder (stop or 300 lb) until plane achieves max overswing.
4- Keep full rudder until the plane stabilizes at the equilibrium sideslip. (note that from point 1 to 4 you have held constant full rudder deflection in the same direction).
5- From the equilibrium sideslip, suddenly neutralize the rudder.
Done. Test finished. Passed. Congrats. Let's go test something else now.
Not only anti-sideslip rudder deflection is required at overswing, it is not even required from equilibrium sideslip.
In fact, it is not required that the rudder/fin must withstand ANY corrective rudder input. If the plane yaws to the left for whatever reason (even pilot inadvertently stepping a bot on the left rudder pedal) and you apply any little bit of right rudder to correct, you are doing something that the certification doesn't require.
Anti-yaw / anti-sideslip means that you apply rudder in a way that the forces generated by the rudder deflection would cause a yaw moment contrary to the direction of the yaw / sideslip. So it is a corrective input. Which is a very reasonable rudder input if you ask me. And one the FAR doesn't require that the fin withstands.
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