![]() ![]() The British Rarden 30mm AFV gun is a current example of this system, adopted partly because the main priority was for single-shot accuracy rather than rate of fire, and partly because the much longer period before the breech opens after firing allows more of the propellant gas to escape from the barrel, minimising gas pollution within the enclosed turret. The Japanese 37mm Ho-203 and the scaled-up 57mm Ho-401 aircraft guns also used long-recoil mechanisms. The ubiquitous John Browning also produced long-recoil designs, most notably used for the 37mm M4 and M10 aircraft guns, the 37mm Ml AA gun (and its M9 aircraft gun derivative) and the USN's 1.1" AA gun. Barrel Extension Recoils, Unlocking Rotary Locking Blocks. This weapon was not particularly successful but did lead to the Vickers 40mm Class aircraft gun of the Second World War.ĭouble Barrel Gun. It has therefore been more popular in large-calibre cannon of 37mm and upwards, one of the earlier examples being the British 1 Vi pdr (one-and-a-half pounder) COW (Coventry Ordnance Works) gun of the First World War. However, the long and relatively soft recoil push puts less strain on the mechanism and makes accuracy easier to achieve while avoiding the need for the whole gun to recoil in its mounting. As a result, weapons using this system are much less common than the short-recoil type. ![]() The range with existing ammunition is about 50 km, but NIIP is developing a new round capable of up to 70 km.The need for the entire barrel/bolt unit to recoil a considerable distance, followed by a delay in commencing reloading while the barrel returns into the firing position, gives long-recoil mechanisms a relatively low rate of fire. It is reportedly being developed by Arsenal (although that is not confirmed) and will use a 'stealth' cupola. There is also a proposed naval version, possibly intended as a replacement for the AK-130. In this form, the gun has a 50-round automatic loader (the turret is unmanned) and can fire at about 15-18 rpm. This gun has initially been developed for an army SPG, based on the 'object 195' tank chassis and called the 'Koalitcia-SV' ('coalition'). It is being developed by the Federal State Unitary Enterprise (FSUE) TsceNII 'Burevestnik' in cooperation with public corporations NPO 'BTA', FSUE 'Uraltransmash', FSUE 'TsceNIIM', and FSUE 'Uralvagonzavod'. This principle is called the 'boxer' system. Unlike the smaller Gast-type guns in Russian service (GSh-23, GSh-30, 2A38M) the mechanisms are not mechanically linked, but they are connected through the hydraulic recoil system, and fire alternately. Russia has revealed a new 152mm gun, with two barrels, vertically stacked. ![]()
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