What mechanism dissipates kinetic energy of an arrested aircraft in arresting gear?

• A. Uses hydraulic dampers or energy absorbers and brake components to dissipate energy.
• B. Uses electric motors to slow the aircraft.
• C. Uses a rigid steel cable without energy absorption.
• D. Uses air brakes only.

Answer: (A)

The mechanism dissipates the aircraft’s kinetic energy through hydraulic energy absorbers (dampers) and brake components. When the tailhook engages the arresting wire, the arresting gear controller channels the aircraft’s forward motion into hydraulic energy absorbers that resist the shuttle’s movement and convert the kinetic energy into heat in the hydraulic fluid. Brake components help apply additional resistance to control the deceleration and limit peak forces. This combination ensures a safe, controlled stop by spreading the energy over time and preventing excessive loads on the aircraft, tailhook, and deck gear. Electric motors aren’t used to slow the aircraft, a rigid cable would transfer peak energy directly, and air brakes alone can’t provide the required energy dissipation.