What is the function of the holdback bar in a catapult installation?

What is the function of the holdback bar in a catapult installation?

• A. It guides the aircraft during taxi
• B. It deflects debris after launch
• C. It provides structural support for the deck during launch
• D. It restrains the aircraft during the initial phase of launch until catapult power is applied

Answer: (D)

The holdback bar's job is to restrain the aircraft during the very start of the launch, ensuring the aircraft doesn’t move forward until the catapult is providing thrust. It connects the aircraft to the catapult shuttle so the system can transfer energy cleanly and start the takeoff with controlled acceleration. Once catapult power comes up, the bar is released and the aircraft is accelerated down the deck. This keeps the initial motion orderly and prevents premature movement or misalignment.

The holdback bar's job is to restrain the aircraft during the very start of the launch, ensuring the aircraft doesn’t move forward until the catapult is providing thrust. It connects the aircraft to the catapult shuttle so the system can transfer energy cleanly and start the takeoff with controlled acceleration. Once catapult power comes up, the bar is released and the aircraft is accelerated down the deck. This keeps the initial motion orderly and prevents premature movement or misalignment.