Crankshaft Mechanism is included: Crank(blue), Connecting rod (green), Piston(red). This worksheet demonstrates the use Maple in Mechanics. It illustrates how a Mechanism works. This engine translates rotation into reciprocating linear piston motion(press engine and pumps). Many small engines are a single piston (mopeds, garden machinery have single cylinder and translates reciprocating linear piston motion into rotation. The CM uses often in industry. You can show and read about it from internet site http://en.wikipedia.org/wiki/Crank/. As a rule for calculations of the CM uses graph-analitic methods. We would like to combine the Cartesian equation of motion(kinematis) and the Lagrange equation (dynamics). This worksheet is supplyed graphics and animations.