Oerlikon KAD-B (20 mm)

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Write an introduction to the article in 2-3 small paragraphs. Briefly tell us about the history of the development and combat using the weaponry and also about its features. Compile a list of air, ground, or naval vehicles that feature this weapon system in the game.

Vehicles equipped with this weapon

General info

Tell us about the tactical and technical characteristics of the cannon or machine gun.

Available ammunition


The default belt alternates between the API-T (Armour-piercing incendiary tracer) and HEF-I (High-explosive fragmentation incendiary) shells.

Air targets

The Air targets belt alternates between 2 HEF-I shells and 1 API-T shell.

Armoured targets

The Armoured targets belt alternates between 2 API-T shells and 1 HEF-I shell.

Comparison with analogues

Compared to the Russian Gsh-23L cannon, the Oerlikon supports a bigger penetrating power (29 mm to Oerlikon's 53 mm with the AP belts).

Usage in battles

Air-To-Air combat

The Oerlikon is great at dealing with enemy aerial targets. It has great fire rate and muzzle velocity making hitting the enemy much easier.

Ground targets

Due to the decent penetration the Oerlikon offers with the API-T shell, it can be used to deal with lightly armoured AFVs and can penetrate the tops of enemy MBTs.

Pros and cons


  • Great damage against aerial targets
  • Good penetration values
  • Great firerate


  • Usually hull mounted on a helicopter, making it hard to aim.


Examine the history of the creation and combat usage of the weapon in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the weapon and adding a block "/History" (example: https://wiki.warthunder.com/(Weapon-name)/History) and add a link to it here using the main template. Be sure to reference text and sources by using <ref></ref>, as well as adding them at the end of the article with <references />.


Excellent additions to the article would be video guides, screenshots from the game, and photos.

See also

Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:

  • reference to the article about the variant of the cannon/machine gun;
  • references to approximate analogues by other nations and research trees.

External links

Paste links to sources and external resources, such as:

  • topic on the official game forum;
  • encyclopedia page on the weapon;
  • other literature.

Britain aircraft cannons
20 mm  Hispano Mk.I · Hispano Mk.II · Hispano Mk.V · Oerlikon KAD-B
25 mm  ADEN 25
30 mm  ADEN · ADEN Mk.4
40 mm  Rolls-Royce Type BH · Vickers S
47 mm  Vickers P
57 mm  Molins Class M
20 mm  GI2 (South Africa) · Hispano 404 (France) · M61A1 (USA)
27 mm  Akan m/85 (Sweden) · Mauser BK27 (Germany)
30 mm  M230E-1 (USA)