^Sengfelder، Günther (1993). German Aircraft Landing Gear. Atglen, PA USA: Schiffer Publishing. صفحات 141–142. ISBN0-88740-470-7. During retraction the nosewheel had to turn through 90 degrees, which was achieved by means of a mechanism in the head of the wheel fork. On retraction, a spring-loaded level with pulley, which limited deflection to 60 degrees by means of a locking hook and stop, was folded into the fuselage and turned through ninety degrees after making contact with a guide.