Aircraft Systems  Chapter 7  Introduction  Powerplant  This chapter covers the primary systems found on most  aircraft. These include the engine, propeller, induction,  ignition, as well as the fuel, lubrication, cooling, electrical,  landing gear, and environmental control systems.  An aircraft engine, or powerplant, produces thrust to propel  an aircraft. Reciprocating engines and turboprop engines  work in combination with a propeller to produce thrust.  Turbojet and turbofan engines produce thrust by increasing  the velocity of air flowing through the engine. All of these  powerplants also drive the various systems that support the  operation of an aircraft. 