24 cm Kanone 3

The 24 cm Kanone 3 (24 cm K 3) was a German heavy siege gun used in the Second World War by the first battalion of Artillerie-Regiment 84. Four were in service when Germany invaded Poland, assigned to the first two batteries of I./AR 84. In the Battle of France the battalion still only had four guns. By Operation Barbarossa all three batteries were equipped with two guns apiece. This situation did not change for the next two years.

24 cm Kanone 3
Class Vehicle
Type Towed Artillery
Manufacturer Rheinmetall
Production Period 1938 - 1944
Origin Germany
Country Name Origin Year
Germany 1939
Country Name Operational Year Retirement Year
Germany 1939 1945 View
ManufacturerName Production From Production To Quantity
Rheinmetall 1938 1944 14 View

The K 3's gun design was nothing innovative, but the same cannot be said for the carriage. Rheinmetall placed a lot of emphasis on ease of assembly. It did not require a crane because it used electric winches, mounted on the carriage, to pull various parts through a system of inclined ramps, guide rails and runways. It also used the Rheinmetall's dual-recoil system, first seen on the 21 cm Mörser 18. The barrel recoiled normally in its cradle, but, in addition, the whole top carriage, which carried the barrel and its cradle, recoiled across the main part of the carriage. This system damped out the recoil forces and made for a very steady firing platform.

The K 3 was a gigantic weapon that was transported in six loads. These consisted of the firing platform, the carriage, the cradle, the barrel, the breech and an electric generator.

The Wehrmacht was not content with the gun's performance: "It was felt to be wasteful of time and manpower, the transport arrangements were cumbersome and the performance was not considered to be commensurate with the size of weapon." These led to experiments by Krupp and Rheinmetall to extend the range. These included "pre-grooved" projectiles which showed no significant improvement, squeeze-bore, discarding sabot and even a smoothbore version. None of these reached beyond the experimental stage.

Type Heavy Siege Howitzer
Place of origin Germany
Service history
In service 1939–45
Used by Nazi Germany
Wars World War II
Production history
Designer Rheinmetall
Designed 1935–38
Manufacturer Krupp
Produced 1938–44
Number built 14+
Weight 54,866 kg (120,959 lb)
Barrel length 13.102 m (40 ft)
Shell weight 151.4 kg (334 lb) (HE)
Caliber 238 millimetres (9.4 in)
Breech horizontal sliding block
Recoil dual-recoil hydropneumatic
Carriage box trail
Elevation 0° to +56°
Traverse 6° on carriage
360° on platform
Rate of fire 1 rd per 4–5 min
Muzzle velocity 970 m/s (3,182 ft/s)
Maximum firing range 37. km (23 mi)

End notes