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Green or blue projectile with brown nose and 1/4 black letters reading "High pressure test round" Cartridge, 20 mm, low pressure test, Mk 102 Mod 0 (USN) Not listed: 1700: Inert: Not listed: Green or blue projectile with brown nose and 1/4 black letters reading "Low pressure test round" Cartridge, 20 mm, high explosive incendiary, Mk 105 Mod 0 ...
The usual nomenclature of ammunition indicates the diameter of projectile and the length of the cartridge that holds it; for example, 20×102 mm is a 20 mm projectile in a 102 mm long case. Though this designation is often assumed to be unique, this is not always the case, e.g. there are three different 20×110 mm types which are not compatible.
The basic design was based on the original Oerlikon 20 mm cannon, in turn based on the German Empire's Becker 20 mm cannon of World War I. In the post-war period, Oerlikon had developed the original design to produce three autocannons with increasingly powerful rounds; the original model, later known as the "F", used the Becker 20x70mm round ...
The Hispano fired a 130 grams (4.586 oz) 20 mm diameter projectile from a 110 mm (4.331 in) long casing, the whole round weighing 257 g (9.065 oz). [19] Lengths of the projectiles varied with type but were set to variable depth in the casing to produce a total full round length of 184 mm (7.244 in) regardless of projectile type. [ 20 ]
The cartridges were intended to be aid to anti-Communist insurgents and Allied forces equipped with US weapons. They were loaded in 5-round stripper clips in M1 bandoleers (holding 6 × 5-round clips in cardboard spacers, or 60 rounds each) packed in US Navy 20mm Mark 1 metal ammo chests (33 × 60-round bandoleers; or 1980 rounds each).
The S-18/1100 started life as a selective fire variant of the earlier S-18/1000 anti-tank rifle.As a result of its powerful ammunition, the gun had tremendous recoil. Also, its length and weight made portability difficult, so a two-wheeled split-trail carriage was provided.
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The Oerlikon 20 mm cannon is a series of autocannons based on an original German Becker Type M2 20 mm cannon design that appeared very early in World War I. It was widely produced by Oerlikon Contraves and others, with various models employed by both Allied and Axis forces during World War II .