High Quality Content by WIKIPEDIA articles! The Sd.Kfz. 11 (Sonderkraftfahrzeug - special motorized vehicle) was a German half-track that saw very widespread use in World War II. Its main role was as a prime mover for medium towed guns ranging from the 3.7 cm FlaK 43 anti-aircraft gun up to the 10.5 cm leFH 18 field howitzer. It could carry eight troops in addition to towing a gun or trailer.