Back Dlouhý pochod 4B Czech Larga Marcha 4B Spanish Longue Marche 4B French Longa Marcha 4B Galician צ'אנגג'נג 4B HE Long March 4B ID Lunga Marcia 4B Italian Długi Marsz 4B Polish Longa Marcha 4B Portuguese Чанчжэн-4B Russian
 Rendering of Long March 4B | |
| Function | Launch vehicle |
|---|---|
| Manufacturer | SAST |
| Country of origin | China |
| Cost per launch | US$50 million (2006) [1] |
| Size | |
| Height | 44.1 m (145 ft)[1] |
| Diameter | 3.35 m (11.0 ft)[2] |
| Mass | 249,200 kg (549,400 lb)[2] |
| Stages | 3 |
| Capacity | |
| Payload to LEO | |
| Mass | 4,200 kg (9,300 lb) [3] |
| Payload to SSO | |
| Mass | 2,800 kg (6,200 lb)[3] |
| Payload to GTO | |
| Mass | 1,500 kg (3,300 lb)[3] |
| Associated rockets | |
| Family | Long March |
| Derivative work | Long March 4C |
| Launch history | |
| Status | Active |
| Launch sites | |
| Total launches | 52 |
| Success(es) | 51 |
| Failure(s) | 1 |
| First flight | 10 May 1999 |
| Last flight | 13 November 2024 |
| First stage | |
| Height | 27.91 m (91.6 ft) |
| Diameter | 3.35 m (11.0 ft) |
| Propellant mass | 182,000 kg (401,000 lb) |
| Powered by | 4 YF-21C |
| Maximum thrust | 2,961.6 kN (665,800 lbf) |
| Specific impulse | 2,550 m/s (8,400 ft/s) |
| Propellant | N2O4 / UDMH |
| Second stage | |
| Height | 10.9 m (36 ft) |
| Diameter | 3.35 m (11.0 ft) |
| Propellant mass | 52,700 kg (116,200 lb) |
| Powered by | 1 YF-24C (1 x YF-22C (Main)) (4 x YF-23C (Vernier)) |
| Maximum thrust | 742.04 kN (166,820 lbf) (Main) 47.1 kN (10,600 lbf) (Vernier) |
| Specific impulse | 2,942 m/s (9,650 ft/s) (Main) 2,834 m/s (9,300 ft/s) (Vernier) |
| Propellant | N2O4 / UDMH |
| Third stage | |
| Height | 14.79 m (48.5 ft) |
| Diameter | 2.9 m (9 ft 6 in) |
| Propellant mass | 14,000 kg (31,000 lb) |
| Powered by | 2 YF-40 |
| Maximum thrust | 100.85 kN (22,670 lbf) |
| Specific impulse | 2,971 m/s (9,750 ft/s) |
| Propellant | N2O4 / UDMH |
The Long March 4B (Chinese: 长征四号乙火箭), also known as the Chang Zheng 4B, CZ-4B, and LM-4B, is a Chinese expendable orbital launch vehicle. Launched from Launch Complex 1 at the Taiyuan Satellite Launch Center, it is a 3-stage launch vehicle, used mostly to place satellites into low Earth orbit and Sun-synchronous orbits. It was first launched on 10 May 1999, with the FY-1C weather satellite, which would later be the target in the 2007 Chinese anti-satellite missile test.
The Chang Zheng 4B experienced its only launch failure on 9 December 2013, with the loss of the CBERS-3 satellite.[4]
- ^ Brian Harvey (2013). China in Space: The Great Leap Forward. Springer Science & Business Media. p. 96. ISBN 978-1-4614-5043-6.
- ^ a b "CZ-4B". Encyclopedia Astronautica. Archived from the original on 21 March 2008. Retrieved 27 April 2008.
- ^ a b c "Long March-4B". Gunter's Space Page. Retrieved 27 April 2008.
- ^ Boadle, Anthony. "China-Brazil satellite launch fails, likely fell back to Earth". Reuters. Retrieved 10 December 2013.