The Dong Feng 4 or DF-4 (also known as the CSS-3)'s a long-range two-stage Chinese Intermediate-range ballistic missile with liquid fuel (Nitric acid/UDMH). It was thought to be deployed in limited numbers in underground silos beginning in the 1970s and early 1980s. The Dong Feng 4 has a takeoff thrust of 1,224.00 kN, a takeoff weight of 82000 kg, a diameter of 2.25 m, a length of 28.05 m and a fin span of 2.74 m. The range of the Dong Feng 4, which's equipped with a 2,190 kg nuclear warhead wi… (More on Df-4)