The RotVelocity of a
BasePart|part describes how its
BasePart/Orientation is presently changing. In other words, this property describes how the fast part is rotating. The part only rotates if it is not anchored.
The unit of this property is radians per second.
Using this in conjunction with
AlignOrientation allows for aligned parts to have matching RotVelocity and Orientation values.
Rotating a Part with RotVelocity
The script below creates a new
BasePart|part and sets its
Part/RotVelocity to *Vector3.new(0, 10, 0) every
RunService/RenderStepped so that the part rotates in a circular motion.