Hispano HS.9 (20 mm)

Description

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

• D.371 H.S.9

General info

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

Available ammunition

• Default: HEI · HEI · P · T
• Universal: HEI · SAP-I · AP · T
• Ground targets: AP · AP · AP · HEI · T
• Tracers: AP · T · HEI
• Stealth: HEI · HEI · SAP-I · AP

Penetration statistics
Ammunition	Penetration @ 0° Angle of Attack (mm)
	10 m	100 m	500 m	1,000 m	1,500 m	2,000 m
HEI	4	4	3	2	2	2
T	17	15	11	7	5	0
AP	35	32	22	13	8	5

Shell details
Ammunition	Velocity (m/s)	Projectile mass (kg)	Fuse delay (m)	Fuse sensitivity (mm)	Explosive mass (TNT equivalent) (g)	Ricochet
						0%	50%	100%
HEI	820	0.13	0.1	0.1	12.1	79°	80°	81°
T	820	0.13	-	-	-	47°	56°	65°
AP	820	0.13	-	-	-	47°	60°	65°

Comparison with analogues

Give a comparative description of cannons/machine guns that have firepower equal to this weapon.

Usage in battles

Describe the cannon/machine gun in the game - its distinctive features, tactics of usage against notable opponents. Please don't write a "guide" - do not impose a single point of view, but give the reader food for thought.

Pros and cons

Summarise and briefly evaluate the weaponry in terms of its characteristics and combat effectiveness. Mark pros and cons as a list.

Pros:

Cons:

History

The story of the Hispano HS.9 begins with the Oerlikon FF, a wing-mounted anti-aircraft weapon whose lineage goes back to German industrialist Reinhold Becker who made the Becker M2 in World War I as an autocannon for the German Air Force (Luftstreitkräfte). The only weapon of its type during the Great War to see service in Germany, the Becker's design was sold after the war to Switzerland to comply with restrictions stipulated in the Treaty of Versailles. The patents for the Becker ended up in the hands of the Swiss arms firm Oerlikon in 1924, who made their first improvement on the design, the Oerlikon S, in 1927. The FF began development in 1935 when Oerlikon decided to modify their 20 mm design to fit in the wings of aircraft. It was soon followed by an upgraded variant called the FFS which fired a 20x110 mm cartridge at 450 rounds per minute with a muzzle velocity of 2,700 ft/s (830 m/s).

When France began expanding its Armée de l'Air in the 1930s, the company Hispano-Suiza acquired a license to make the Oerlikon FFS and modified the design to serve as a moteur-canon that could be installed between the cylinder banks of their V12 aircraft engines or through the propeller shift of an inline engine. These cannons would become the HS.7, but later got upgraded to the HS.9. However, Hispano-Suiza got into a patent dispute with Oerlikon and ended up losing their license to produce the HS.7 and HS.9. Hispano-Suiza chief engineer would then be contracted in 1933 to make a replacement of these cannons which became the Hispano 404 which would arm French, British, and American aircraft throughout World War II, while the FF would be licensed by Germany and Japan to arm Axis aircraft in the same conflict.

Media

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.