The 20×138mmB or Long Solothurn cartridge is a type of ammunition used mainly for anti-aircraft and anti-tank weapons during World War II. The designation means the caliber is 20 mm, the length of the cartridge case is 138 mm and B indicates it is a belted case. The loaded cartridge weighs 300 grams (10.7 oz).[1]
20×138mmB
20×138B cartridge and a tape measure in centimeters
138mmb, long, solothurn, cartridge, type, ammunition, used, mainly, anti, aircraft, anti, tank, weapons, during, world, designation, means, caliber, length, cartridge, case, indicates, belted, case, loaded, cartridge, weighs, grams, 138b, cartridge, tape, meas. The 20 138mmB or Long Solothurn cartridge is a type of ammunition used mainly for anti aircraft and anti tank weapons during World War II The designation means the caliber is 20 mm the length of the cartridge case is 138 mm and B indicates it is a belted case The loaded cartridge weighs 300 grams 10 7 oz 1 20 138mmB20 138B cartridge and a tape measure in centimetersTypeAnti armor anti airPlace of origin SwitzerlandService historyUsed bySwitzerland Germany Italy Finland PolandWarsWorld War IIProduction historyDesigned1930ManufacturerSwiss SolothurnVariantsLong SolothurnSpecificationsCase typeBottleneck beltedBullet diameter20 mmNeck diameter20 9 mm 0 82 in Shoulder diameter25 5 mm 1 00 in Base diameter26 86 mm 1 057 in Rim diameter28 48 mm 1 121 in Rim thickness26 86 mm 1 057 in Case length138 mm 5 4 in Overall length202 7 mm 7 98 in Ballistic performanceBullet mass type Velocity Energy120 grams 4 1 oz 900 metres per second 2 950 ft s 47 000 J 34 655 ft lbf 1 Contents 1 History 2 Weapon platforms 2 1 Switzerland 2 2 Germany 2 3 Italy 2 4 Finland 2 5 Poland 3 ReferencesHistory Edit Three Finnish amp Italian 20 138B cartridges and a 37 mm anti tank shell The 20 138mmB cartridge was initially created by the Swiss Solothurn company in the early 1930s Weapon platforms EditThe 20 138mmB cartridge is used in the following weapons Switzerland Edit Solothurn anti tank rifles S 18 1000 and S 18 1100 Solothurn ST 5 20mm AA GunGermany Edit FlaK 30 and FlaK 38 single barrel and Flakvierling quadruple barrel anti aircraft guns KwK 30 and KwK 38 vehicle mounted weapons MG C 30L aircraft gunItaly Edit Cannone Mitragliera da 20 65 modello 35 Breda Cannone Mitragliera da 20 77 Scotti Finland Edit Lahti L 39 anti tank rifle Lahti L 40 anti aircraft gunPoland Edit Nkm wz 38 FK anti tank vehicle mounted gun Wikimedia Commons has media related to 20 x 138 mm References Edit a b Johnson Melvin M Jr 1944 Rifles and Machine Guns William Morrow and Company p 385 Retrieved from https en wikipedia org w index php title 20 138mmB amp oldid 1087655704, wikipedia, wiki, book, books, library,
