Long March 4C

The Long March 4C, also known as the Chang Zheng 4C, CZ-4C and LM-4C, previously designated Long March 4B-II, is a Chinese orbital launch vehicle. It is launched from the Jiuquan, Taiyuan, and Xichang Satellite Launch Centers, and consists of 3 stages. Long March 4C vehicles have been used to launch the Yaogan-1, Yaogan-3 synthetic-aperture radar (SAR) satellites and the Fengyun-3A polar orbiting meteorological satellite. On 15 December 2009, a Long March 4C was used to launch Yaogan-8.[3]

Long March 4C
Long March 4C
FunctionLaunch vehicle
ManufacturerSAST
Country of originChina
Size
Height45.8 m (150 ft) [1]
Diameter3.35 m (11.0 ft)
Mass250,000 kg (550,000 lb)
Stages3
Capacity
Payload to LEO
Mass4,200 kg (9,300 lb) [2]
Payload to SSO
Mass2,800 kg (6,200 lb) [2]
Payload to GTO
Mass1,500 kg (3,300 lb) [2]
Associated rockets
FamilyLong March
Launch history
StatusActive
Launch sitesTSLC, LA-7, LA-9
JSLC, LA-4/SLS-2
XSLC, LA-3
Total launches30
Success(es)28
Failure(s)2
First flight26 April 2006
Last flight29 January 2021
First stage
Length27.91 m
Diameter3.35 m
Propellant mass182,000 kg (401,000 lb)
Engines4 YF-21C
Thrust2,961.6 kN (665,800 lbf)
Specific impulse2,550 m/s (8,400 ft/s)
FuelN2O4 / UDMH
Second stage
Length10.9 m
Diameter3.35 m
Propellant mass52,700 kg (116,200 lb)
Engines1 YF-24C
(1 x YF-22C (Main))
(4 x YF-23C (Vernier))
Thrust742.04 kN (166,820 lbf) (Main)
47.1 kN (10,600 lbf) (Vernier)
Specific impulse2,942 m/s (9,650 ft/s) (Main)
2,834 m/s (9,300 ft/s) (Vernier)
FuelN2O4 / UDMH
Third stage
Length14.79 m
Diameter2.9 m
Propellant mass14,000 kg (31,000 lb)
Engines2 YF-40A
Thrust100.85 kN (22,670 lbf)
Specific impulse2,971 m/s (9,750 ft/s)
FuelN2O4 / UDMH

Because it was still designated as Long March 4B-II at the time of its maiden flight, the first launch is often mistaken for a Long March 4B. The Long March 4C is derived from the Long March 4B, but features a restartable upper stage, and a larger payload fairing.

On 1 September 2016, the Long March 4C failed for reasons not yet known. A Long March 4C rocket blasted off from the Taiyuan Satellite Launch Center in Shanxi but failed to insert its payload, the Gaofen 10 satellite, into its designated orbit.[4][5]

List of launches
Main article: List of Long March launches
Flight number Date (UTC) Launch site Payload Orbit Result
1 26 April 2006
22:48		 TSLC, LA-7 Yaogan 1 SSO Success
2 11 November 2007
22:48		 TSLC, LA-7 Yaogan 3 SSO Success
3 27 May 2008
03:02		 TSLC, LA-7 Fengyun 3A SSO Success
4 15 December 2009
02:31		 TSLC, LA-9 Yaogan 8
Xiwang 1		 SSO Success
5 5 March 2010
04:55		 JSLC, LA-4/SLS-2 Yaogan 9A
Yaogan 9B
Yaogan 9C		 LEO Success
6 9 August 2010
22:49		 TSLC, LA-9 Yaogan 10 SSO Success
7 4 November 2010
18:37		 TSLC, LA-9 Fengyun 3B SSO Success
8 29 May 2012
07:31		 TSLC, LA-9 Yaogan 15 SSO Success
9 25 November 2012
04:06		 JSLC, LA-4/SLS-2 Yaogan 16A
Yaogan 16B
Yaogan 16C		 LEO Success
10 19 July 2013
23:37		 TSLC, LA-9 Shijian 15
Shiyan-7
Chuangxin-3		 SSO Success
11 1 September 2013
19:16		 JSLC, LA-4/SLS-2 Yaogan 17A
Yaogan 17B
Yaogan 17C		 LEO Success
12 23 September 2013
03:07		 TSLC, LA-9 Fengyun 3C SSO Success
13 20 November 2013
03:31		 TSLC, LA-9 Yaogan 19 SSO Success
14 9 August 2014
05:45		 JSLC, LA-4/SLS-2 Yaogan 20A
Yaogan 20B
Yaogan 20C		 LEO Success
15 20 October 2014
06:31		 TSLC, LA-9 Yaogan 22 SSO Success
16 10 December 2014
19:33		 JSLC, LA-4/SLS-2 Yaogan 25A
Yaogan 25B
Yaogan 25C		 LEO Success
17 27 August 2015
02:31		 TSLC, LA-9 Yaogan 27 SSO Success
18 26 November 2015
21:24		 TSLC, LA-9 Yaogan 29 SSO Success
19 9 August 2016
22:55		 TSLC, LA-9 Gaofen 3 SSO Success
20 31 August 2016
18:50		 TSLC, LA-9 Gaofen 10 SSO Failure [4]
21 14 November 2017
18:35		 TSLC, LA-9 Fengyun 3D
HEAD-1		 SSO Success
22 31 March 2018
03:22		 TSLC, LA-9 Gaofen-1 02
Gaofen-1 03
Gaofen-1 04		 SSO Success
23 10 April 2018
04:25		 JSLC, LA-4/SLS-2 Yaogan 31-01A
Yaogan 31-01B
Yaogan 31-01C		 LEO Success
24 8 May 2018
18:28		 TSLC, LA-9 Gaofen 5 SSO Success
25 20 May 2018
21:28		 XSLC, LA-3 Queqiao (Chang'e 4 relay satellite)
Longjiang-1
Longjiang-2		 Earth–Moon L2 Success
26 22 May 2019
22:49		 TSLC, LA-9 Yaogan 33 SSO Failure [6]
27 4 October 2019
18:51		 TSLC, LA-9 Gaofen 10-2 SSO Success
28 27 November 2019
23:52		 TSLC, LA-9 Gaofen 12 SSO Success
29 27 December 2020
15:44		 JSLC, LA-4/SLS-2 Yaogan 33-2 SSO Success
30 29 January 2021
04:47		 JSLC, LA-4/SLS-2 Yaogan 31-02A
Yaogan 31-02B
Yaogan 31-02C		 LEO Success

References
  1. Brian Harvey (2013). China in Space: The Great Leap Forward. Springer Science & Business Media. p. 96. ISBN 978-1-4614-5043-6.
  2. Gunter Krebs. "CZ-4C (Chang Zheng-4C)". Gunter's Space Page. Retrieved 27 April 2008.
  3. Rui C. Barbosa (15 December 2009). "China completes 2009 schedule by launching another spy satellite". NASASpaceFlight.com.
  4. Stephen Chen (2 September 2016). "Chinese rocket launch reported to have failed, destroying cutting-edge earth observation satellite". South China Morning Post. Retrieved 2 September 2016.
  5. Rui C. Barbosa (2 September 2016). "Long March 4C apparently fails during Gaofen 10 launch". NASASpaceFlight.com. Retrieved 2 September 2016.
  6. "Launch of Yaogan-33 satellite fails in north China". Xinhuanet.com. Retrieved 23 May 2019.
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