Automatkanon [sv]

An autocannon, automatic cannon or machine cannon is a fully automatic gun that is capable of rapid-firing large-caliber (20 mm/0.79 in or more) armour-piercing, explosive or incendiary shells, as opposed to the smaller-caliber kinetic projectiles (bullets) fired by a machine gun. Autocannons have a longer effective range and greater terminal performance than machine guns, due to the use of larger/heavier munitions (most often in the range of 20–60 mm (0.79–2.36 in), but bigger calibers also exist), but are usually smaller than tank guns, howitzers, field guns, or other artillery. When used on its own, the word "autocannon" typically indicates a non-rotary weapon with a single barrel. When multiple rotating barrels are involved, such a weapon is referred to as a "rotary autocannon" or occasionally "rotary cannon", for short (particularly on aircraft).

Autocannons are heavy weapons that are unsuitable for use by infantry. Due to the heavy weight and recoil, they are typically installed on fixed mounts, wheeled carriages, ground combat vehicles, aircraft, or watercraft, and are almost always crew-served, or even remote-operated with automatic target recognition/acquisition (e.g. sentry guns and naval CIWS). As such, ammunition is typically fed from a belt system to reduce reloading pauses or for a faster rate of fire, but magazines remain an option. Common types of ammunition, among a wide variety, include HEIAP, HEDP and more specialised armour-piercing (AP) munitions, mainly composite rigid (APCR) and discarding sabot (APDS) rounds.

Although capable of generating extremely rapid firepower, autocannons overheat quickly if used for sustained fire, and are limited by the amount of ammunition that can be carried by the weapons systems mounting them. Both the US 25 mm M242 Bushmaster and the British 30 mm RARDEN have relatively slow rates of fire so as not to deplete ammunition too quickly. The Oerlikon KBA 25 mm has a relatively mid-high rate of fire 650 rounds per minute but can be electronically programmed to 175-200 rounds per minute. The rate of fire of a modern autocannon ranges from 90 rounds per minute, in the case of the British RARDEN, to 2,500 rounds per minute with the GIAT 30. Rotary systems with multiple barrels can achieve over 10,000 rounds per minute (the Russian GSh-6-23, for example). Such extremely high rates of fire are effectively employed by aircraft in aerial dogfights and close air support on ground targets via strafing attacks, where the target dwell time is short and weapons are typically operated in brief bursts.

Konetykki eli pikatykki on räjähtäviä ammuksia eli kranaatteja ampuva asejärjestelmä, jolla voidaan ampua sarjatulta. Toisin sanoen aseen lataaminen ja laukaiseminen tapahtuu automaattisesti. Raskaammat automaattilatauksella varustetut tykit, kuten esimerkiksi taistelupanssarivaunujen pääaseet eivät ole konetykkejä, sillä niille on tyypillistä yksittäislaukaisu sekä hitaampi tulinopeus. Ensimmäinen konetykki oli Hiram Maximin 1880-luvun lopussa suunnittelema 37 mm Q.F. 1 pounder eli ”pom-pom”.

Maskinkanon er ein kanon med kaliber 20 mm eller større som kan skyte automatisk eld.

Ammunisjonen til maskinkanon er normalt granatar, med ein tennsats og eit sprenglekam. Verknaden er med dette større enn for tunge maskingevær, som vanlegvis skyt heilmantla blyammunisjon. Maskinkanonar vart vanlege rundt andre verdskrig, og vert brukt i fly, på skip og på stormpanservogner. Dei vert brukt mot fly, infanteri og lettpansra køyretøy eller fartøy som mål. Ekstremt snøggskytande maskinkanonar har ei gatlingmekansime og er roterande kanonar med fleire løp.

Vanlege kaliber for maskinkanonar er 20, 23, 25, 30 og 40 mm.

Det norske forsvaret brukar 20 mm maskinkanon på stormpanservogna NM135, jagarflyet F-16 og som luftvern, 25 mm på JSF F-35, 30 mm vert brukt på stormpanservognen CV9030N og 40 mm som luftvern.

Automatkanon, militärförkortning: akan (innan 1937 autk), även kallad automatpjäs, kort: apj (även apjäs), är generellt beskrivet en kanon som genom inbyggd funktion eller integrerad automatladdare har förmågan att avge automateld. Med andra ord, ett automatvapen med en kaliber över 12,7 mm eller 20 mm beroende på definition.

Automatkanoner används inom flera områden i modern krigföring, såsom luftvärn, robotvärn, pansarvärn, sjövärn, kustvärn, samt mot lätt skyddade och oskyddade mål som infanteri. De är normalt monterade på fordon eller marklavetter på grund av storlek och vikt.