The AF902 FCS/35 is designed primarily to intercept and destroy aircraft, low flying cruise missiles and precision-guided missiles. It can also defeat lightly armored vehicles, surface targets and concealed ground forces. Source The Diplomat

AF902A FCS/Twin 35mm AA Gun/PTFP Ammunition Air Defense System; AF902 FCS/T35mm AA Gun/PL9C Missile Integrated Air Defence System

Twin 35 mm AA Gun and PL-9C Missile @norinco.com

The Type 90 twin-35mm anti-aircraft artillery (AAA) is a Chinese copy of the Swiss Oerlikon GDF, one of the world’s most capable low-altitude air defence weapon systems. The weapon was designed to engage high-speed, low-flying aircraft, helicopters, unmanned aerial vehicles (UAV) and cruise missiles. A tracked self-propelled variant of this weapon has also been produced and tested but it did not enter the PLA service. The Type 90 replaced the obsolete Type 65 and type 74 twin-37mm AAA to provide field air defence for the ground forces at the division and group army level.

China imported a small number of the Oerlikon GDF twin-35mm AAA and the associated Skyguard air defence radar system from Switzerland in the 1980s. Later the weapon was produced in China locally under license as the Type 90. The Oerlikon GDF AAA system is available in three major variants: GDF-1, GDF-2 and GDF-3. It is not known exactly which model the Type 90 was based on, but it is thought to be comparable in performance to the GDF-2 developed in 1980. The Type 90 was first revealed to the public during the 1999 National Day parade held in Beijing.

AF902 Radar/Twin 35 mm AA Gun @norinco.comChinese Army PG99 35mm anti-aircraft twin-gun @armyrecognition.com

The 35mm cannon mounted on a 4-wheel cartridge has a cyclic rate of fire of 550 rounds/min. The muzzle velocity is 1,175m/s. The cannon fires high explosive incendiary rounds. It is not clear whether China has also obtained the Advanced Hit Efficiency and Destruction (AHEAD) round technology from Switzerland along with the Oerlikon 35mm gun. The AAA system carries 280 rounds for each barrel. The reloading time is 7.5 seconds. The iconic large muzzle break is missing on the later variant of the Type 90.

AF 902 Fire control search tracking radar @armyrecognition.com

The Type 90 includes a computer controlled electro-optical director for 3-dimensional target tracking in conjunction with the laser range finder. The Type 902 (Chinese copy of the Skyguard) millimetre-wave target searching radar has a detection range of 8,000m. The AAA system can work either in conjunction with the Type 902 fire control radar or autonomously. A typical battery using the Skyguard radar consists of two twin 35 mm gun platforms with a single fire control radar. In addition, the 35mm guns are also highly lethal against ground targets.

The fire-control unit used by the Type 90 was based on the improved Skyguard-II, which differs from the basic variant Skyguard in that it has two tracking systems—a Type 902 target searching radar and an electro-optical passive tracking director. The electro-optical tracking system uses high-resolution optical/infrared TV for passive tracking in clear weather. The advantage of continuing tracking without emitting radar signals increases its survivability when facing enemy anti-radiation missiles (ARMs).

Crew	5
Main weapon caliber (mm)	35
Rate of fire (rds/min)	1100
Muzzle velocity (m/s)	1175
Barrel length (calibres)	90
Traverse arc (degree)	360
Weight (kg)	8000
Max. road speed (km/h)	80

@army-guide.com

Luoyang PL-9 @ausairpower.net

PL-9 IR-guided missile was first developed in the late 80s based on PL-8/Python-3 technology and is for export only. It has an all-aspect InSb seeker and a radio fuse. Its range is 500m minimum and 16km maximum. Speed is Mach 3.5 and load is 40g. Its forward control fins look similar to those of AIM-9L (double delta). The latest variant of PL-9 is called PL-9C with improved multi-band IR seeker and a new programmable digital processor giving it a greater IRCCM capability and higher killing probability. Its range is also increased to 20km. @chinese-military-aviation.blogspot.com