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An engine that uses a gas turbine to drive a propeller, providing thrust primarily through the propeller. Example: ATR 72.

A propulsion system using an electric motor to drive the aircraft's propellers or fans. Example: Solar Impulse 2.

A type of jet engine that uses stored propellant in a combustion chamber, without requiring atmospheric oxygen. Example: Space Shuttle.

A form of electric propulsion that accelerates ions to create thrust. Example: Deep Space 1 spacecraft.

Utilizes both solid and liquid or gaseous oxidizers for propulsion. Example: SpaceShipTwo.

Uses a fan mounted within a cylindrical shroud or duct to produce thrust, typically for VTOL (vertical take-off and landing) aircraft. Example: Bell Boeing V-22 Osprey.

A jet engine with a fan that moves additional air around the turbine, providing thrust with greater efficiency. Example: Boeing 787 Dreamliner.

A type of jet engine that uses a turbine to compress air which is then mixed with fuel and ignited. Example: North American X-15.

A type of internal combustion engine that uses the heat of compression to initiate ignition to burn the fuel. Example: Cessna 172 JT-A.

An airbreathing jet engine that operates by the ram effect, with no moving parts. It requires forward motion to generate thrust. Example: Lockheed SR-71 Blackbird.

A gas turbine engine designed to transmit power through a shaft to some other machinery, such as a helicopter's rotor blades. Example: Bell 206 JetRanger.

An internal combustion engine that uses one or more reciprocating pistons to convert pressure into a rotating motion. Example: Piper PA-18 Super Cub.

An advanced type of aircraft propeller with blades that resemble a turbofan's blades, often geared to achieve higher speeds. Example: Tupolev Tu-334.

Still largely conceptual, it's a proposed engine that creates thrust by heating the air with a thermal barrier. No practical example as it's still theoretical.

A rocket engine that uses liquid propellants for creating thrust in space. Example: Saturn V F-1 engine.

An electromagnetic thruster for propelling spacecraft. It heats and accelerates plasma using electromagnetic forces. Example: Not yet used in operational spacecraft but has been ground-tested.

A rocket engine that uses a nuclear reactor to heat propellant, creating thrust. Example: Conceptual designs for Mars missions.

A variant of the ramjet where combustion takes place in supersonic airflow, allowing for high-speed atmospheric flight. Example: X-43A.

A propulsion system that uses detonation waves to combust the fuel and oxidizer mixture. Example: Test vehicles (conceptual, not yet in practical aircraft).