Long March 4B

Long March 4B
	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)
Diameter	3.35 m (11.0 ft)
Mass	249,200 kg (549,400 lb)
Stages	3
Capacity
Payload to LEO
Mass	4,200 kg (9,300 lb)
Payload to SSO
Mass	2,800 kg (6,200 lb)
Payload to GTO
Mass	1,500 kg (3,300 lb)
Associated rockets
Family	Long March
Derivative work	Long March 4C
Launch history
Status	Active
Launch sites	Taiyuan, LA-7 and LA-9; Jiuquan, LA-4/SLS-2;
Total launches	48
Success(es)	47
Failure(s)	1
First flight	10 May 1999
Last flight	16 April 2023
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
	[edit on Wikidata]

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.