Krupp 87mm field gun M. 1886

 

 

 

 

Bulgarian designation :

8,7-см далнобойно полско оръдие “Круп”

87-мм нескорострелно полско оръдие “Круп”

Krupp designation :

9cm Feldkanone C/80

Calibre :

87mm L/24

Weight of the barrel :

450 kg

Weight of the breech-block :

38.5 kg

Weight of the carriage :

610 kg

Weight in action :

1060 kg

Weight of the limber :

500 kg (empty) – 895 kg (loaded)

Weight in marching order :

1955 kg

Weight of ammunition wagon :

2075 kg

Length of the barrel :

2.1 m

Length of the bore :

1865 mm

Length of twist :

3915 mm – 45 calibres

Barrel grooves

number :

24

depth :

1.25 mm

width :

8.40 mm

Battering charge :

1.5 kg of black powder (Grobkörniges Art.-Pulver)

600 g of Russian pyroxylin smokeless powder П.К.О.

530 g of 7x7x5.5 scaly nitroglycerine powder K.R.

500 g of 4x4x1 scaly nitroglycerine powder D.R.P.

Common shell

weight :

6.21 kg – charge: 210 g

length :

215 mm

max. range :

6800 m

Shrapnel C/88

weight :

7.1 kg – charge: 80 g of black powder

180 bullets x 16 g

length :

188 mm

fuze :

time – graduated up to 10’

max. range :

2600 m

Shrapnel C/91

weight :

7.1 kg – charge: 80 g of black powder

260 bullets x 13 g

length :

188 mm

fuze :

time and percussion – graduated up to 15”

max. range :

4000 m

Shrapnel C/97

weight :

7.1 kg – charge: 90 g of black powder

305 bullets x 11 g

length :

188 mm

fuze :

time and percussion – graduated up to 17”

max. range :

4500 m

Case shot

weight :

6.7 kg – 82 zinc balls

max. range :

400 m

Muzzle velocity :

460 m/s with common shell

435 m/s with shrapnel

Remaining velocity :

217 m/s at 6000 m with common shell

195 m/s at 4000 m with shrapnel

Length of the line of sight  :

1050 mm

Elevation :

+ 24° / + 8°

Track :

1.528 m

Transport :

drawn by six horses

Ammunition :

carriage – 1 case shot

limber – 30 rounds, 2 case shots and 35 charges

ammunition wagon – 85 rounds, 2 case shots and 90 charges

8 ammunition wagons for every eight-guns battery (with six-guns batteries only 6 ammunition wagon)

Remarks :

Slow firing jacket field gun (Mantelrohr), cylindro-prismatic wedge breech mechanism with an expanding steel obturating ring, traverse on pivot. It was fitted with a direct fire sight and aiming circle. It was modernised to use smokeless powder, but the rapidity of fire was not very great. It was adopted also by the Rumanian and Turkish Army.

Pictures from Sofia Military Museum

Pictures from Beograd Museum

More pictures from a Krupp catalogue

from a Flickr file of the “Biblioteca do Exército Português” (thanks to MC Heunis)

 

 

 

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