|The rotation of the handle is transformed by gears into the intended movement of the model. The following devices are to be used:
|The crank slider transforms a rotation into a combined motion up and down and from side to side. It is the main drive by Off Road, Stormy Sea, Good Fishing, Amazon-Warrior and Fire-Dragon.
|An oscillating lever transforms rotary motion in an oscillating motion. The neck of the Parlamentarian is an oscillating lever of the first order which is linked by a connecting rod with the rotating crank.
|There is another version of oscillating lever without a connecting rod between crank and lever. In this version a crankpin is rotating in a longated hole of the lever to move it, see Olympia 2000.
|The ratchet transforms a continuous rotation into a stepped or intermittant motion. In the model The Representative the ratchet moves one notch by each turn of the crank, so the arm lifts step by step.
|A friction wheel can change the direction and the frequency of a motion. Combined with two cams you can transform the continuous rotation of the drive shaft into a reciprocating motion of the output shaft, see Wimbledon and the head-drive of To Fly a Kite.
|Strings are supporting the main motion of some models by lifting and lowering parts of the model, see Good Fishing, Fire-Dragon and To Fly aKite.