Schneider-Canet 120mm long gun M. 1897

Bulgarian designation :120-мм крепостно-обсадно оръдие Д-28Schneider designation :Canon de siège de 12cm sur affût à frein hydrauliqueCalibre :120mm L/28Weight of the barrel :1180 kgWeight of the breech-block :40 kgWeight of the carriage :1390 kgWeight in action :2570 kgWeight of the platform :2070 kgWeight of the limber :390 kgBarrel length :3.360mBarrel groovesnumber :30depth :1.5 mmangle of twist :progressive, 3° to 6°Battering charge :1.61 kg of pyroxilyn powder B.M.⁴ + 30 g of black powder1.61 kg of nitroglycerine powder 290 x 5 x 2.5 D.R.P. + 30 g of black powder1.7 kg of nitroglycerine powder 250 x 9 x 5.5 D.R.P. + 30 g of black powder2 kg of nitroglycerine powder (full charge)0.6 kg of nitroglycerine powder (reduced charge)+ 30 g of black powderShellweight :20 kg - charge: 1.35 kg of black powdermax. range :7850 m (full charge)6430 m (reduced charge)Mine shellweight :20 kg - charge : 2 kg Schneideritemax. range :7850 m (full charge)6430 m (reduced charge)Mine shellweight :20 kg – charge : 3.16 kgmax. range :7850 m (full charge)6430 m (reduced charge)Shrapnelweight :20 kg  - charge: 280 g of black powder369 bullets x 16 gmax. range :6500 mMuzzle velocity :480 m/s (full charge)310 m/s (reduced charge)500 m/s (D.R.P.)Remaining velocity :242 m/s at 7850 mElevation :+ 30° / - 12°Height of the wheels :1.27 mTrack :1.30 mTransport :Remarks :Slow firing heavy gun (description). In 1897 twenty four guns were ordered. They were equipped with quadrant level ¼ circle with goniometer graduated in millièmes.According with KOSAR. Artillerie im 20. Jahrhundert. Teil 2 – Mittelre Feldgeschütze, p. 124, this gun had a shield. But it is very unlikely, since it was not normal for a shield to be fitted to a gun with no recoil system.