Krupp 75mm field gun M. 1886

 

 

 

 

Bulgarian designation :

75-мм нескорострелно полско оръдие “Круп”

Turkish designation :

7,5/27 sm. mantelli sόvari sahra top

Romanian designation :

Tunul “Krupp” calibrul 75 mm, model 1880

Krupp designation :

8cm Feldkanone C/80

Calibre :

75mm L/27

Weight of the barrel :

300 kg

Weight of the breech :

26 kg

Weight of the carriage :

550 kg

Weight in action :

850 kg

Weight of the limber :

460 kg (empty) – 775 kg (loaded)

Weight in marching order :

1625 (loaded)

Weight of the ammo wagon :

1882 kg (loaded)

Barrel length :

2000 mm

Length of the bore :

1795 mm

Length of twist :

2700 mm – 36 calibres

Barrel grooves

number :

24

depth :

1.25 mm

width :

7.00 mm

Battering charge :

1 kg of black powder (Grobkφrniges Art.-Pulver)

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

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

340 g of 180 x 8 x 6.5 nitroglycerine powder D.R.P.

Common shell

weight :

4.3 kg – charge: 100 g

length :

185 mm

max. range :

6100 m

Shrapnel C/88

weight :

4.355 kg – charge : 55 g of black powder

85 bullets x 15 g

length :

153 mm

fuze :

time – graduated up to 10’

max. range :

2600 m

Shrapnel C/91

weight :

4.355 kg – charge : 60 g of black powder

170 bullets x 11 g

length :

153 mm

fuze :

time and percussion – graduated up to 15”

max. range :

4400 m

Case shot

weight :

4.45 kg – 69 balls

4.9 kg – 165 bullets

4.9 kg – 204 bullets

max. range :

400 m

Muzzle velocity :

460 m/s

Remaining velocity :

234 m/s at 3000 m with shrapnel

189 m/s at 6000 m with common shell

Angle of descent :

at 100 m – 0° 9’

at 500 m – 0° 53’

at 1000 m – 2° 08’

at 1500 m – 3° 53’

at 2000 m – 6° 07’

at 2500 m – 8° 42’

at 3000 m – 11° 46’

at 3500 m – 15° 16’

at 4000 m – 19° 11’

at 5000 m – 28° 25’

at 6000 m – 40° 54’

Length of the line of sight :

925 mm

Elevation :

+ 25° / + 8°

Track :

1.528 m

Transport :

drawn by six horse

Ammunition :

carriage - 1 case shot

limber - 24 shells, 12 shrapnel, 2 case shots

ammunition wagon - 48 shells, 60 shrapnel, 2 case shots

6 ammunition wagons for every six guns battery

Remarks :

Slow firing field gun, cylindro-prismatic wedge breech mechanism with an expanding steel obturation ring. 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 Romanian and Turkish Army.