Krupp 150mm long gun M. 1892

 

 

 

 

Bulgarian designation :

150-мм дълго нескорострелно оръдие Д-30

Krupp designation :

15cm Belagerungskanone L/30

Calibre :

149.1mm L/30

Weight of the barrel :

3530 kg

Weight of the breech-block :

160 kg

Weight of the carriage :

2550 kg

Weight in action :

6080 kg

Weight of the platform :

3370 kg

Weight of the limber :

420 kg

Barrel length :

4.470 m

Number of barrel grooves :

36

Battering charge :

10.7 kg of prismatic grey powder

of nitroglicerine smokeless powder (D.R.P.)

Shell

weight :

40 kg – charge: 1.75 kg of black powder

max. range :

10420 m

Shrapnel

weight :

40 kg – 550 bullets x 26 g

max. range :

9660 m

Muzzle velocity :

520 m/s

Remaining velocity :

262 m/s at 10400 m

Elevation :

+ 35° / - 5°

Traversing angle :

=

Transport :

towed, usually by oxen, broken into two loads

Ammunition :

carried by an ox-cart with a 425 kg payload : 3 boxes each with 3 shells and battering charges

Remarks :

Slow firing heavy gun, Broadwell wedge breech mechanism with an expanding steel obturation ring. Even if it was not a true quick-firing gun, a recoil buffer was connected from the platform to the trail and wooden wedges behind the wheels were used for counter-recoil. These wedges both took up the recoil and made the task of manhandling the gun back into position easier. On either side of the carriage there were two small platforms on which the gunners climbed to load and level the gun. These guns were equipped with quadrant level ¼ circle with goniometer graduated in millièmes. Fourteen guns were delivered in 1892, but two of them mounted steel wheels type Bonagente. In 1911 smokeless powder was introduced.