Pointblank
Senior Member
The F-15 has a tail hook that serves two purposes, assisting in emergency landing situations and to secure the aircraft during maintenance engine testing. The tail hook is held in place by a safety pin. When a pilot deploys the hook a pneumatic system disengages the pin and thrusts the hook down, keeping the hook approximately eight inches from the ground to catch the raise arresting cable. Unlike an aircraft carrier arresting cable, a ground runway arresting system slows an aircraft, pulling in to a stop, over a much longer range, rather that instantly yanking the aircraft to a stop.