CN90 F4 (90 mm)

This page is about the French tank cannon CN90 F4 (90 mm). For other versions, see CN90 F2 (90 mm) and CN90 F3 (90 mm).

Description

The CN90 F4 (otherwise known as the Super 90) is a 90 mm smooth-bore cannon manufactured by Nexter. The Super 90 is based off of the earlier F1 and F3 versions and compared to the earlier versions, it is way lighter and has higher muzzle velocities, while also being 19 calibres longer than the earlier version of the cannon.

Vehicles equipped with this weapon

• MARS 15

General info

Both the barrel and the breech are made from ESR (Electro-Slag Refined) steel, a process which adds more polish and toughness to the steel, while the vertical wedge breech is inclined at an angle of 35° to allow easier, and faster, reloading.

In case maintenance is required, the breech mechanism and the recoil mechanism have been designed in a way to allow quick and easy maintenance without having to strip down the cannon completely. The breech mechanism itself is made from modular assemblies while the recoil mechanism is made up of smaller subassemblies, which aid in the quick and easy maintenance.

A thermal coat is also added onto the cannon to help withstand higher temperatures without the barrel deforming. At the end of the cannon, a single-baffle muzzle brake is added to aid with recoil.

Available ammunition

Penetration statistics
Ammunition	Type of warhead	Penetration @ 0° Angle of Attack (mm)
		10 m	100 m	500 m	1,000 m	1,500 m	2,000 m
OCC 90 F2	HEATFS	320	320	320	320	320	320
OE 90 F1	HE	13	13	13	13	13	13
OFL 90 F1	APFSDS	271	267	253	235	218	201

Shell details
Ammunition	Type of warhead	Velocity (m/s)	Projectile Mass (kg)	Fuse delay (m)	Fuse sensitivity (mm)	Explosive Mass (TNT equivalent) (g)	Ricochet
							0%	50%	100%
OCC 90 F2	HEATFS	950	8.95	0.05	0.1	877.7	65°	72°	77°
OE 90 F1	HE	750	10.45	0	0.1	945	79°	80°	81°
OFL 90 F1	APFSDS	1,275	2.33	N/A	N/A	N/A	78°	80°	81°

Smoke shell characteristics
Ammunition	Velocity (m/s)	Projectile Mass (kg)	Screen radius (m)	Screen deploy time (s)	Screen hold time (s)	Explosive Mass (TNT equivalent) (g)
OFUM 90 F1	750	10.2	13	5	20	50

Comparison with analogues

Comparable cannons to the CN90 F4
Name	Year of Creation	Nation	Maximum Penetration (mm)	Calibre (mm)
T208E9 (90 mm)	1957	US	300	90
Type 61 (90 mm)	1955	JPN	320	90
BK90 (90 mm)	1960	GER	320	90

Usage in battles

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Pros and cons

Pros:

• Fairly good reload speed of 6.5 seconds
• Access to smoke shells
• Starting HEAT-FS is powerful

Cons:

• Very mediocre APFSDS shell; low penetration power and post-penetration damage

History

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Media

CN90 F4 mounted on the MARS 15

See also

• CN90 F3 (90 mm) - A cannon from which the F4 was based off of

External links

• [Army-Guide] CN90 F4