Antigel AD

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Antigel AD
Type Autocannon
Place of origin  Nekor
Service history
Used by Nekor Defense Force
Production history
Designer Marek Jacka
Designed 1934
Manufacturer Antigel
Produced 1936
Specifications
Weight 26.3 kg (59.2 lbs.)
Length 1.37 m (4 ft. 7 in.)
Barrel length 80 centimeters (31.5 inches)

Shell 20x105
Caliber 20 mm
Barrels 1
Action Gas operated, delayed blowback
Rate of fire 400 rpm
Muzzle velocity 750 m/s
Feed system 20-round double or saddle-drum
100-round drum
Belt fed

The Antigel AD (Automatické Dělo; Automatic Cannon) is a series of automatic cannon designed and produced by Antigel of Nekor. It has been used by all three services of the Nekor Defense Force; as a light anti-aircraft weapons for both the Nekorian Army and Nekorian Navy as well as aircraft armament for the Nekorian Air Force, specifically on the Kosman S-72. Versions of the Antigel remain in service even today, over 70 years after its introduction. Firing a 20 mm projectile, it delivered a useful load of explosive from a relatively light weapon. This made it an ideal anti-aircraft weapon for mounting on light vehicles, as well as a fighter aircraft gun, replacing the multiple rifle or machine gun caliber weapons.

A single Antigel AD on a light antiaircraft mount

History

The weapon was developed in the mid 1930's by engineer Marek Jacka at the request of the Nekorian Air Force. The Nekorian Air Force wanted a lightweight yet powerful cannon for the newly designed Kosman S-35 aircraft.

Design

The 20x105 mm round is a duplicate of the round utilized by the Cailitz PAP-33 antitank rifle. However, after original tests displayed significant jamming issues, a rimless 20x105 mm projectile was adopted. The projectile weight is 134 g. Compared to rival designs, the Antigel AD had some disadvantages, such as low rate of fire and low muzzle velocity, as well as limited ammunition storage in its drums. On the other hand, it was much lighter and shorter.

Variants

Antigel AD-M

Antigel AD-M
Type Autocannon
Place of origin  Nekor
Service history
Used by Nekor Defense Force
Production history
Designer Marek Jacka
Designed 1975
Manufacturer Antigel
Produced 1979
Specifications
Shell 20x105
Caliber 20 mm
Barrels 1
Action Gas operated, delayed blowback
Rate of fire 1000 rpm
Muzzle velocity 1100 m/s
Feed system 20-round double or saddle-drum
100-round drum
Belt fed

The Antigel AD-M is a modernized version of the original AD weapon. Designed in the 1970's, it was intended as an aircraft weapon first, and ground based weapon secondly. It featured a vastly improved rate of fire; one of the primarily complaints regarding the older Antigel AD cannons. Nevertheless, the rapid introduction of even higher performance revolver cannons meant the Antigel AD-M was never as popular in aircraft role as many foreign designs.

A newer version of the Antigel, the Antigel AD-M-128 was developed in 1990 around a new proprietary round from Antigel. The round features a slightly higher muzzle velocity, achieving 1,050 meters per second. It was not procured by the Nekorian Air Force but the Nekorian Army and Nekorian Navy saw the merit in an improved anti-aircraft round. The Nekorian Navy has since switched to the ADW LAD-95 35 mm cannon for large surface vessels, but continues to utilize the Antigel AD-M-128 on smaller combat vessels.

There are three different ammunition types for the Antigel AD-M and ADM-120;

  • HEI: Projectile weight 120 g, explosive filler 10 g
  • APHEI: Projectile weight 120 g, explosive filler 4.5 g
  • AP: Projectile weight 111 g, core weight 70 g

Operators

See also