Krupp 75mm mountain gun M. 1904

Bulgarian designation :75-мм скорострелно планинско оръдие “Круп”Krupp denomination :7,5 cm Gebirgs-Kanone M. 05Calibre :75mm L/14Weight of the barrel :105 kgWeight of the breech-block :19.5 kgWeight of the carriage :280 kgWeight in action :411 kgBarrel length :1.050 mRiflinglength :746.5 mmtwist :increasing, from 1 in 45 to 1 in 25 calibresBarrel groovesnumber :28depth :0.75 mmwidth :5.92 mmHeight of the line of fire :685 mmShieldthickness :3 mmweight :24.6 kgheight :0.4 mwidth :0.2 mCartridgeweight :755 gshelled :6.017 kgcharge :162 g of Rottweil smokeless powderShellweight :5.1 kg – charge : 105 g Picric acidfuze :time – weight : 130 gmax. range :5000 mShrapnelweight :5.1 kg – charge : 100 g of black powder200 bullets x 11 gfuze :time and percussion – weight : 290 gmax. range :4500 mMuzzle velocity :330 m/sRemaining velocity :206 m/s at 4500 m with shrapnel199 m/s at 5000 m with H.E. shellAngle of descent :at 100 m – 0° 18’at 500 m – 1° 31’at 1000 m – 3° 12’at 1500 m – 5° 11’at 2000 m – 7° 32’at 2500 m – 10° 09’at 3000 m – 13° 09’at 3500 m – 16° 38’at 4000 m – 20° 42’at 5000 m – 32° 42’Elevation :+ 15° / - 10° (with axle in low position)+ 25° / - 10° (with axle in high position)Traversing angle :4°Height of wheels :800 mmTrack :740 mmLength of the axis :970 mmTransport :4 loads: 1 – barrel and elevating gears = 164.6 kg ; 1 - shield and fore-carriage = 156 kg; 1 – cradle, sledge and recoil gears = 161 kg; 1 – trail, wheels and shaft = 157.6 kgWithout the pack saddles the loads weighted 110 – 120 kgammunition load : 16 rounds = 145.7 kgbattery load : spare parts and accessories = 104.8 kgAmmunition :128 shells (16 boxes, with 8 rounds each, each ammunition pack animal carrying 2 boxes - each ammunition box with 8 rounds weights 52.3 kg)Remarks :Quick firing mountain gun with hydro-spring recoil system, single-motion wedge breech mechanism, traverse on pivot. It was equipped with the Krupp mountain sight, but it had not the independent line of sight. It could fire the same ammunition as the Schneider mountain gun, but it had to employ different firing table, since the ballistic features were different.In 1904 Bulgarian Army bought 9 six-guns batteries armed with Krupp mountain gun M. 1905 with 512 shells per gun. The delivery ended in October 1905. In 1911 2 more guns were bought in order to transform the existing 9 six-guns batteries into 14 four-guns batteries.Drawings of 75 mm Krupp mountain gun