Aircraft roll like they're on springs

It is depending on so much factors, lateral stability versus directional stability, swept wings usually are more prone to Dutch roll as yawing will cause the effective chord to change. Dihedral and anhedral will change lateral stability. The size of the vertical fin, bigger stabilizer increases directional stability but depending on hight of the fin might also cause a stabilizing effect on the roll (the force created by the vertical stab is above the CG so tend to cause a roll in opposite direction). And so on…

I will check my Oxford books tonight when I’m back from flying to see if there is something interesting in there to share.

The aircraft itself might not be prone to Dutch roll but you can still make it Dutch roll with a little help. If you cycle the rudder left and right at the correct frequency you can make any plane Dutch roll. You can best see this when looking directly over the wing, you’ll notice the yaw and roll will be out of synch upon finding the right frequency.

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