Sky Bow II
The Sky Bow II (TK-2) (天弓二, Tien Kung II) is a SAM system also developed by the Chungshan Institute of Science and Technology. Originally a TK-1 with a first-stage booster, the system became a slightly-enlarged modified version of the Sky Bow I (TK-1) missile using an X-Band active-radar seeker, with a longer range and limited anti-missile capability. The TK-2 active radar seeker operates in the 28–32 GHz frequency range and provides reasonably good performance against air-breathing targets of typical aircraft size. The X-Band active radar seeker used on the TK-2 SAM system was developed from licensed radar technology that CSIST purchased from the U.S. in the 1980s.
The TK-2 also have the added benefit of being able to use the same box launcher as the TK-1. Internal components were replaced with miniaturized parts to take advantage of modern electronics technologies, yielding extra room within the missile for more fuel and a more powerful main rocket motor. It is speculated that the earlier TK-2 design has been developed into a surface-to-surface missile. The TK-2 has also been modified for use as a sounding rocket to perform upper atmospheric research for the civilian space program. The sounding rocket test vehicle launched on December 24, 2003, measures 7.7m in overall length and 1,680 kg in launch weight. It reached a maximum altitude of almost 270 km and splashed 142 km down range around 8 minutes after launch into the Pacific. The science mission payload was in the 220 pounds (100 kg) weight class and the rocket reached a burnout velocity of 2,000 m/s. According to the report from Taiwan Defense Review, depending on its payload and launch parameters, the rocket can be converted to attain a horizontal maximum range of up to 500 km.
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