Radial engines are an essential component in many types of aircraft, including single and multi-engine planes, helicopters, and other small aircraft. Although radial engines are widely used, they have many synonyms that can be used to describe them. Some of the common synonyms of radial engines include star-shaped engines, cylinder engines, rotary engines, and round engines. Additionally, experts often describe radial engines as having a piston movement that radiates inward from the center. They also often feature multiple cylinders and a crankshaft that runs in the opposite direction of the propeller or rotor. Regardless of the name used, radial engines continue to provide quality and reliable performance that is essential in many types of aircraft.