2009

Rotating the child does not affect the parent.
Links act as a one-way conduit to transmit the transforms of a parent object
to its child object. If you move, rotate, or scale the parent, the child is moved,
rotated, or scaled by the same amount. Because hierarchical links are one-way,
moving, rotating, or scaling the child has no effect on its parent.
The end result is that transforms applied to a child object are applied in
addition to any transforms inherited from the child’s parent.
Animating a Parent Object
Only transforms are passed from parent to child. Animating a parent object
using move, rotate, or scale animates the parent and the subtree attached to
the parent.
Animating a parent's modifiers or creation parameters has no effect on its
descendants.
Animating with Forward Kinematics | 3357