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Initial Operational Capability (IOC):
Also Known As: CZ-4, CZ-4A, CZ-4B and Long March 4B
Parent System: ChangZheng 4
Initial Operational Capability (IOC): 7 September 1988
Maiden Flight: 7 September 1988
Total Production: ?
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Description: The ChangZheng 4, CZ-4 or Long March 4 in English, is a three-stage liquid propellant space launch vehicle family developed by the Shanghai Academy of Space Flight Technology (SAST) in support of the People's Republic of China (PRC) space program. The CZ-4 launcher was designed in the1980s to place satellites into polar and sun-synchronous orbits (SSO). The launch vehicle is based on the FengBao-1 two-stage rocket. The ChangZheng 2, 3 and 4 space launch vehicles are scheduled for replacement by the heavier ChangZheng 5 after 2014.
The ChangZheng 4A made its first flight successfully on 7 September 1988. It is capable of delivering a 1,500 kg payload into Sun Synchronous Orbit (SSO). The ChangZheng 4B was developed in the 1990s and made its first flight in 1999. It is capable of delivering a 2,200 kg payload into Sun Synchronous Orbit (SSO).
ChangZheng 4B Specifications
Number of Stages: 3
Height: 46 meter (1,794 inch)
Rocket Diameter: 3.35 meter
Max Lift-off Thrust: 2,971 kN (303 ton)
Max Lift-off Weight: 248 ton (547,773 pound)
Payload to SSO: 2,200 kilogram
CEP: Circular Error Probable
Meters (m) Kilometers (km) Nautic Miles (nm) Inch (in) Yard (yd) Foot (ft) Millimeter (mm)
Pound (lb) Kilogram (kg) kN (KiloNewton) Ton (t)
Meters per Second (mps) Kilometers per Hour (kph) Knot (kt) Miles per Hour (mph)
Liter (l) Galon (gl)
Year (yr) Minutes (min) Second (sec)
Operators & Related Equipment
Grand Total ?1
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