107mm heavy field gun M. 1867

Bulgarian designation :9-фунтово оръдие - бронзовоRussian designation :9-фунтовая медная пушка обр. 1867 г.Calibre :106.7mm L/19.7Weight of the barrel :625.7 kgWeight of the breech-block :47.5 kgWeight of the carriage :322.3 kg (without wheels)Weight in action :1092 kgWeight in marching order :1657 kgBarrel length :2.097 mBarrel groovesnumber :16depth :1.4 mmwidth :14 mmBattering charge :1.23 kg of black powder (full charge)430 g and 280 g (reduced charge for cast iron shell)670 g of smokeless powderCast iron s.length :2.15 calibres (230 mm)weight :11.08 kg – charge : 410 g of artillery gunpowdermuzzle velocity :320 m/s (full charge)max. range :4481 m (full charge)Shrapnelweight :11.47 kg – charge : 136 g280/300 bullets x 10.6 g x 12.7 mmfuze :10 sec. time fuze M. 1875muzzle velocity :317 m/smax. range :2347 mCanister shellweight :12.76 kg – charge : 150 g of artillery gunpowder213 bullets x 12.7 mmmuzzle velocity :298 m/smax. range :3200 mCase shotweight :10.4 kg – 108 balls x 74 g x 24 mmmax. range :533 mSharohaweight :? kg – charge : 26 g68 balls x 24 gmax range :1707 mElevation :+ 20° / - 7°30’Wheelsweight :144 kgheight :1394 mmtrack :1473 mmTransport :drawn by six horsesAmmunition :limber : 12 shellsammunition wagon : 36 shellsRemarks :Russian bronze heavy field gun delivered in 1878, after the war of Liberation. The carriage was made of iron and had two seats for the gunners. It could fire both canister shell (картечна граната), an early model of shrapnel, and case shot. It could fire also a shell with spherical solid head (шароха) and an incendiary shell, which was employed by the Russian artillery only till 4 May 1875.At first the sigh was not graduated according with the range, but was marked in Russian lines (2.54 mm) that did not correspond directly to the distance expressed in meters, for example a distance of 500 m corresponded to 6 ½ lines, while a distance of 1000 m to 15, and not 13 lines.In 1896 the artillery engineer lt. Stefan Slavchev carried out a plan to upgrade these guns. Their breech chambers were modified to use smokeless powder and the guns were equipped with arc sight. The changes were made in the Sofia artillery arsenal.