The input energy must be converted into the intended movement of the model.

		Crank slider transforms the rotation of a lever into an up-and-down and back-and-forth movement. Ruffler's model "Off Road" is moved by a crank slider, just like many of Keith Newstead's models.				Cams and pushrods convert a rotation into a linear up- and down movement. Newstead often uses cams together in conjunction with cams and pushrods.
		Friction wheel drive The driven wheel is smaller than the driving wheel, so there is a transformation into a higher speed.				Gear wheel drive Rotational speed and sense of rotation can be changed.