Krupp 120mm gun M. 1882

 

 

 

 

Bulgarian designation :

120-мм нескорострелно оръдие Д-25

Krupp designation :

12cm schwere Belagerungskanone C/80

Calibre :

120.3mm L/25

Weight of the barrel :

1440 kg

Weight of the breech-block :

80 kg

Weight of the carriage :

1355 kg

Weight in action :

2795 kg

Weight of the platform :

1250 kg

Weight of the limber :

627 kg

Barrel length :

2.925 m

Length of the bore :

2.602 m – 21 calibres

Barrel grooves

number :

32

depth :

1.5 mm

width :

8.3 mm

Length of twist :

4.8 m – 40 calibres

Battering charge :

3.25 kg of black powder (Prismatisches Schwarzpulver)

? kg of nitro-glycerine tabular powder

Shell

weight :

16 kg – charge: 0.72 kg of black powder

max. range :

7850 m

Shrapnel

weight :

16 kg – 330 bullets x 16 g

max. range :

6000 m

Muzzle velocity :

460 m/s

Remaining velocity :

220 m/s a 7500 m

Elevation :

+ 30° / - 12°

Remarks :

Slow firing heavy hooped gun, with cylindro-prismatic wedge breech mechanism. On either side of the carriage there were two small platforms on which the gunners climbed to load and level the gun. Wooden wedges, weighting 300 kg each, were placed behind the wheels for counter-recoil. These guns were equipped with quadrant level ¼ circle with goniometer graduated in millièmes. Six guns were given by the Russian Army in 1882, three more were captured during the Balkan War.