Aircraft powerplant systems are complete engine assemblies, including accessories, lubrication, fuel, and cooling systems, that generate thrust or propulsion for flight. 

In General Aviation aircraft, their powerplants integrate one or more reciprocating (piston) engines paired with their propeller(s), and auxiliary systems necessary for flight. In high-performance and transport aircraft, gas turbines (turbojet, turbofan, and turboprop engines) are used for converting chemical energy into mechanical energy or high-velocity gas. In small UAVs and some General Aviation applications, electric engines are also used.

Aircraft engine assemblies include essential subsystems, such as an induction subystem to manage fuel/air mixture delivery to the engine, a lubrication subsystem providing oil to reduce friction and cool engine components, a cooling subsystem to provide air or liquid cooling and maintain optimal operating temperatures, an ignition subsystem to ignite the fuel-air mixture (e.g., magnetos in piston engines), or an exhaust subsystem to remove direct waste gases away from the airframe.

Propellers used with reciprocating (piston) or turboprop engines convert engine torque into forward thrust. Turbochargers or superchargers, when used in aircraft engines aim to increase induction air pressure for higher altitude performance. Other engine accessories are commonly encountered and used in aircraft engines to generate electrical power, create vacuum for instruments, and provide cabin heat.

Engines, propellers and other components of powerplant systems are listed in our Web Platform for Supplies on the basis of their respective manufacturer (e.g. Textron Lycoming™, BRP Rotax®) or broad categories of aircraft they support (e.g. experimental, ultralights, light sport aircraft (LSA), certificated single-engine aircraft, etc.). Articles and other documentation are also included in this Repository.