152mm bronze mortar M. 1867

Bulgarian designation :6-дюймова мортираRussian designation :6-дюймовая медная мортира обр. 1867 г.Calibre :152.4mm L/8.88Weight of the barrel :1572 kgWeight of the breech-block :151.5 kgWeight in action :3128 kgWeight in marching order :4095 kgWeight of the platform :1228 kgBarrel length :1.354 mBarrel groovesnumber :24depth :1.78 mmwidth :16.43 mmBattering charge :2.5 kg of artillery gunpowder (full charge)0.61 kg (lower charge)Cast iron s.length :2.5 calibres (373 mm)weight :36,9 kg – charge : 1.37 kgmuzzle velocity :219 m/s (with full charge)max. range :3980 m (with full charge)Cast iron s.length :2 calibres (296 mm)weight :29.1 kg – charge : 1.02 kgmuzzle velocity :230 m/s (with full charge)max. range :4020 m (with full charge)Cast iron s.length :2.5 calibres (385 mm)weight :30.7 kg – charge : 2.15 kgbattering charge :2.33 kgmuzzle velocity :230 m/smax. range :4020 mElevation :+ 75° / -5°Transport :drawn by six horsesRemarks :Russian bronze mortar delivered in 1878, after the war of Liberation. In firing position it should be placed on a wooden platform. It could also fire with three different charges at a maximum range of 700 m, 1600 m and 3800 m respectively, but, according with Angel Angelov, the Bulgarian gunners usually did not to fire at full charge, since the mortar tended to turn over due to the recoil.