Krupp 120mm gun M. 1882

Bulgarian designation :120-мм нескорострелно оръдие Д-25Krupp designation :12cm schwere Belagerungskanone C/80Calibre :120.3mm L/25Weight of the barrel :1440 kgWeight of the breech-block :80 kgWeight of the carriage :1355 kgWeight in action :2795 kgWeight of the platform :1250 kgWeight of the limber :627 kgBarrel length :2.925 mLength of the bore :2.602 m – 21 calibresBarrel groovesnumber :32depth :1.5 mmwidth :8.3 mmLength of twist :4.8 m – 40 calibresBulgarian ammunitionBattering charge :3.25 kg of black powder (Prismatisches Schwarzpulver)1.1 kg nitroglycerine powder 180 + 90 x 3 x 2 D.R.P.+ 30 g of black powderShellweight :16 kg – charge: 720 g of black powdermax. range :7850 mH.E. Shellweight :16 kg – 1190 g of Füllpulver 60/40max. range :7850 mShrapnelweight :16 kg – 330 lead bullets x 16 g16 kg – 570 lead bullets x 13 gmax. range :6000 mMuzzle velocity :460 m/sRemaining velocity :220 m/s a 7500 mTurkish ammunitionBattering charge :1.2 kg yellowish pyroxilin powder 190 x 3 x 2+ 30 g of black powder1.25 kg greenish pyroxilin powder 190 x 3 x 2+ 30 g of black powderShellweight :17.5 kg – charge: 3.5 g of black powder(Grobkörniges Art.-Pulver)max. range :7500 mMuzzle velocity :425 m/sElevation :+ 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 guns were captured during the Balkan War. After the Balkan Wars, the Turkish shells captured in great number at Odrin, were assigned to the Bulgarian batteries to be temporarily used (Order on Artillery No. 30/23.07.1915).More pictures from Sofia Military Museum