Radial engines are mainly used for aircraft applications and are air-cooled type. The radial engine employs a master connecting rod to which other connecting (articulated) rods are attached radially. This model is radial engine sub-assembly of a five cylinder engine. The articulated rods are connected to the master rod by means of rod bush, and link pins. Pistons are assembled with master and articulated rods using bushes, piston pins and piston
pin plugs.