Krupp 120mm long gun M. 1892

Bulgarian designation :120-мм дълго нескорострелно оръдие Д-30Krupp designation :12cm Festungs-und Belagerungskanone L/30Calibre :120mm L/30Weight of the barrel :1700 kgWeight of the breech-block :100 kgWeight of the carriage :1850 kgWeight in action :3550 kgWeight of the platform :2600 kgWeight of the limber :420 kgBarrel length :3.600 mBattering charge :5.45 kg of prismatic grey powderof nitroglycerine smokeless powder (D.R.P.)Shellweight :20 kg – charge: 1.5 kg of black powdermax. range :9560 mShrapnelweight :20 kg – 400 bullets x 16 gmax. range :7825 mMuzzle velocity :520 m/sRemaining velocity :250 m/s at 9700 mElevation :+ 35° / - 5°Traversing angle :=Transport :usually towed by oxenAmmunition :carried by an ox-cart with a 500 kg payload : 5 boxes each with 4 shells and battering chargesRemarks :Slow firing field 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. Twelve guns were delivered in 1892. In 1911 smokeless powder was introduced.