Definition
A fixed-wing aircraft built primarily for soaring flight that carries an onboard engine and propeller, allowing it to take off, climb, or sustain flight under its own power without relying on a tow plane or winch launch.
Plain English
A glider with its own engine. It can launch itself and stay airborne under power, but it is designed to fly mostly without the engine, like a regular glider.
Context Anchor
Seen in glider training, practice landings, and discussions of aircraft that may use power for part of the flight but still require glider-style landing judgment.
Derivation
Motor comes from the Latin word for mover, indicating the propulsion unit; glider comes from the idea of moving smoothly without power. Together they describe an aircraft designed first for unpowered flight with optional engine assistance.
Why Pilots Care
Allows independent takeoff and landing practice without a tow plane, supporting efficient training and engine-out scenarios.
Intuition Check
Do not think of a motor glider as simply a small airplane, and do not assume it always has usable power. The important point is that it has a motor, but it is still a glider and must be flyable without engine power.
Example Sentence 1
The flight school used a motor glider so students could practice soaring techniques without needing a tow plane on every flight.
Example Sentence 2
Motor gliders let instructors demonstrate engine-out approaches without needing a separate tow aircraft for each flight.