The Flakpanzer IV "Wirbelwind" (Whirlwind in English) was a self-propelled anti-aircraft gun based on the Panzer IV tank. It was developed in 1944 as a successor to the earlier self-propelled anti-aircraft gun M÷belwagen.
Weight 22 tonnes (48,501 lbs)
Length 5.89 m (19 ft 4 in)
Width 2.88 m (9 ft 5 in)
Height 2.76 m (9 ft 1 in)
Crew 5 (commander/gunner, two loaders, driver, radio operator)
Armor 10 - 80 mm (.39 - 3.14 in)
armament 2 cm Flakvierling 38 quad AA
armament 1x7.92 mm Maschinengewehr 34
Engine 12-cylinder Maybach HL 120 TRM
300 PS (296 hp, 221 kW)
Power/weight 13.6 PS/tonne
Payload capacity 3,200 rounds 2 cm
1,350 rounds 7,92 mm
Suspension leaf spring
range 200 km (124 mi)
Speed 40 km/h (25 mph)
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