Definition
An airplane powered by two engines, typically mounted one on each wing or arranged in a push-pull configuration on the fuselage. Twin-engine aircraft offer redundancy, as the remaining engine can sustain controlled flight if one fails, but they require additional training and certification beyond single-engine ratings due to the asymmetric handling characteristics that occur during single-engine operations.
Plain English
An airplane with two engines instead of one. If one engine quits, the other can keep the airplane flying — but flying on just one of two engines handles very differently and takes extra training to do safely.
Context Anchor
Seen in training scenarios, aircraft checkout discussions, and performance planning for aircraft that use two engines.
Why Pilots Care
The second engine supplies redundancy so the aircraft can maintain altitude and reach a suitable airport after an engine failure.
Intuition Check
Twin-engine does not automatically mean safer or able to keep climbing after one engine fails. It only means the aircraft has two engines; what it can do on one engine depends on the aircraft, conditions, and pilot control.
Example Sentence 1
The student transitioned from a single-engine trainer to a twin-engine aircraft after completing his commercial certificate.
Example Sentence 2
In the simulator, the instructor simulated a failure in one engine of the twin-engine aircraft to practice the correct response.