RBX.lua.Motor (Object)
From Legacy Roblox Wiki
A motor is a type of hinge, but motors work like, well, motors. They can be set to do different things by adjusting the properties on the object that has the motor on it. There are several different ways to make it spin, and you can adjust how fast it spins too. Motors can be extremely helpful too. -- WRONG KIND OF MOTOR, IDIOT!
The motor mentioned here is the OBJECT motor. Its whats used to animate characters and Zuka's dragons. They just make Part1 move to [DesiredAngle] relative to Part0.