Turning forces

[88MPH]

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If this thread is still alive, not to beat a dead horse, but you mentioned nothing about rudder/coordination required to "turn" which was the original question. Just so I understand, you're saying it has nothing to do with the rudder?

Which is what I think, cause simply put, you can be in a slip (albeit not a pretty one), and still be turning. So the weathervaning mentioned above should have nothing to do with it. Right?

 

[seagull]

Well, this discussion was more about coordinated turns, I thought.

Rudder in itself may have some small inputs once the turn is established due to various factors, however, it is the vertical stab in more shallow banks, or the horizontal stab in very steep banks, that is actually moving the nose of the aircraft around.

If you are just using rudder, and using the aileron to prevent any bank, the change in direction of the nose is due to the constant force from the rudder applied, the change in direction of the aircraft due to the lift from the AoA you create on the inboard side of the fuselage.

It's actually a lot easier to explain this with just text than what actually makes a car turn. Now THAT can be a challenge, although it seems it should be just intuitive, you have to come up with the actual forces that are resulting in the change of direction.