A prototype Flakpanzer IV Wirbelwind (which translates as Whirlwind in English) appeared in May 1944, in response to the ever-growing threat and air superiority of Allied aircraft. The original concept of the Wirbelwind is credited to Karl Wilhelm Krause of the 12th Hitler Jugend Panzer Division, who suggested mounting a quadruple-barreled 2cm Flakvierling 38 L/112.5 cannon on a Panzer IV chassis. The Wirbelwind had the four 20mm cannons mounted in an open-topped nine-sided turret. Sources differ as to how many Wirbelwinds were produced either 87 or 105 between May and September of 1944 but there were never enough to ward off the marauding Allied fighter-bombers.
Although the 22-tonne Wirbelwind was useful against low-flying aircraft, its 20mm weapon turned out to be less effective than the larger-caliber 37mm cannon used in the newer Ostwind. Operated by a crew of five, the platform could also be used against ground targets.
Size/Weight: 38.5 x 24.5 x 8 cm / 700g