Towing pintle and airbrake connections are provided. The rear flaps also act as an airbrake. When opening the airbrake disturbs the airfoil shape thereby slowing the mill. A movable panel was mounted behind the cockpit, which acted as an airbrake. The model had a ventral airbrake and a French COMM system. "W4052" had the first version of the Youngman Frill airbrake fitted to the fighter prototype. The active rear wing acts as an airbrake to improve stopping power. It has a two-seat cockpit with an airbrake behind the canopy. A further invention was presented with the implementation of an airbrake option. The bridge's "horn" is actually made up of two Westinghouse Airbrake locomotive horns. This class was created specifically to end the trailing-edge airbrake controversy in the Standard Class. This meant, however, that the airbrake could not be used for landings. Later, due to maintenance problem, Iranian airbrake coaches were replaced with vacuum coaches in 2011.