The DF-21 (NATO code name: CSS-5) is a two-stage, solid-propellant, single-warhead medium-range ballistic missile (MRBM) system developed by China Changfeng Mechanics and Electronics Technology Academy (also known as 2nd Space Academy). The missile design is based on the two-stage JL-1 submarine-launched ballistic missile (SLBM). The DF-21 is capable of delivering a 500kT nuclear warhead over a distance of 1,800km. The improved DF-21A was reportedly introduced in 1996.
The first test launch of the DF-21 missile took place in May 1985, followed by a second test launch using modified ground support system in May 1987. The missile entered operational service in the late 1980s. In the mid-1990s, 2nd Aerospace Academy also introduced the improved DF-21A (CSS-5 Mod 2) with increased range and accuracy.
The missile is contained in an alumni-alloy cylinder launch–tube which keeps the missile in an invariable temperature environment. The launch tubes have an elevation range of 0 to 90 degrees. The azimuth range is from -180 to +180 degrees. The missile launch-tube is carried on a 3-axes semi-trailer TEL, which is towed by a HY473 6X6 tractor truck. The TEL trailer and tractor are equipped with hydraulically operated stabilisers which are lowered in preparation for the missile launch.
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Note: Both width and length are accurate and to scale, however the angles are eye-balled from photographs.
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