TY-90

Development

Chinese determined that the MANPAD missiles converted for helicopter use in dogfights was not adequate, so a brand new air-to-air missile specifically for helicopter use was sanctioned, and TY-90 was the resulting product.  The 3 kg warhead of the missile is specially designed to sever the rotary wing with a single shot, and the missile has all-aspect attack capability.  The missile is designed to ensure a single shot would be sufficient to down an attack helicopter, or at least knock it out of action.
At least three additional versions have been developed in addition to the basic version, and two of them being air-to-air versions.  The first adopts a dual-band guidance, adding UV to the original IR, while the second adopts an ImIR guidance.  During the 5th Zhuhai Airshow held at the end of 2004, a ground-launched air defense version appeared, with designation of DY-90, which was essentially the original TY-90, but with an additional option of incorporating a rocket booster to increase range upon customer's request.
A navalized surface-to-air version is also developed, utilizing the FLS-1 system and the basic version with IR guidance, thus providing a fire-and-forget capability in comparison to the case where QW-3 is used.  However, this navalized version has not entered service as of 2008, and the reason is reportedly because that the Chinese military wants to wait until the more advanced dual-band or Imaging IR (ImIR) version to be incorporated into the FLS-1 system, which are currently under development.  However, at Zhuhai Airshow, AVIC I, the developer of TY-90 only acknowledged the developing and active marketing such systems, but refused to further confirm whether the Chinese military or any foreign customers had placed any orders, and neither did the developer confirm such developmental works were privately funded by the developer or received any funds from the state or foreign customers.
Despite marketing efforts, as of 2008, there is no known export of TY-90 of any kind.

SG-II ADS

In 2004, a land based air defense variant of TY-90 is revealed to Chinese public after entering Chinese service in small numbers for sometime.  Shengong (Deity Bow, 神弓)-II Air Defense System (SG-II ADS) is the upgrade of its predecessor SG ADS, with a quadruple TY-90/DY-90 missile launcher replacing the original Type 80 23mm AAA gun in its predecessor, resulting in the new SG-II ADS.  Like its predecessor, SG-II ADS is also a towed system, and utilizes all other subsystems of its predecessor with the exception of the gun.  Because TY/DY-90 is a fire and forget weapon, no modification is needed for the fire control system of the original SG ADS.

LS ADS

During the 5th Zhuhai Airshow held at the end of 2004, a mobile land based air defense variant of TY-90 was revealed, dubbed as LS ADS, short for Lie-Shou (猎手, meaning Hunter) Air Defense System.  Eight TY-90 in two groups of four are mounted in the back of a Dongfeng (东风, East Wind) EQ2050 Iron Armor (Tiejia, 铁甲) High Mobility Multipurpose Wheeled Vehicle (HMMWV), and the fire control system consists of electro-optics including laser, IR & TV, mounted between the two quadruple launchers.
The LS ADS is developed by Norinco, with Dongfeng Motor Corporation as the subcontractor to develop chassis (vehicle).  LS ADS is capable of being air transported, included being slung under helicopters.  The system is operated by a team of two, one driver and one weaponry system officer.  The system can also being integrated into larger air defense network.  A small number subsequently entered PLA service for evaluation purposes.