Definition
A device used to launch an aircraft into flight in a very short distance by applying a powerful, rapid accelerating force. Catapults are most commonly found on aircraft carriers, where they propel the aircraft from a standstill to flying speed within the length of the flight deck.
Plain English
A piece of equipment that gives an aircraft a hard, fast push so it can take off in a much shorter distance than it normally would. Used mostly on aircraft carriers, where the runway is too short for a normal takeoff.
Context Anchor
Seen most often in naval aviation, especially when discussing aircraft carrier launches.
Derivation
From the Greek katapeltēs, meaning 'to hurl down' or 'to throw against.' The original catapults were ancient siege weapons that flung stones or arrows. The aviation use keeps the same idea: a mechanism that throws something forward with great force.
Why Pilots Care
Carrier pilots depend on the catapult to reach takeoff speed on decks too short for a rolling takeoff, directly affecting mission capability and safety.
Analogy
Works like a giant, controlled slingshot that flings the airplane forward instead of letting it roll the long distance a land runway would allow.
Intuition Check
Do not think only of an old weapon that throws stones. In aviation, a catapult is the launch system that accelerates an aircraft to flying speed.
Example Sentence 1
The pilot ran the engines up to full power, saluted, and was thrown into the air by the catapult.
Example Sentence 2
After the catapult stroke, the jet climbed away cleanly from the bow.