Long March 3

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Long March 3
CZ-3.svg
Long March 3
Function Carrier rocket
Manufacturer CALT
Country of origin  People's Republic of China
Size
Height 43.25 metres (141.9 ft)[1]
Diameter 3.35 metres (11.0 ft)[1]
Mass 204,000 kilograms (450,000 lb)[1]
Stages 3
Capacity
Payload to
LEO
5,000 kilograms (11,000 lb)[2]
Payload to
GTO
1,500 kilograms (3,300 lb)[2]
Associated rockets
Family Long March
Derivatives Long March 3A
Launch history
Status Retired
Launch sites LC-1, XSLC
Total launches 13
Successes 10
Failures 2
Partial failures 1
First flight 29 January 1984
Last flight 25 June 2000

The Long March 3 (Chinese: 长征三号火箭), also known as the Changzheng 3, CZ-3 and LM-3, was a Chinese orbital carrier rocket. It was launched from Launch Complex 1 at the Xichang Satellite Launch Centre. It was a 3-stage rocket, and was mostly used to place DFH-2-class communications satellites into geosynchronous transfer orbits. It was complemented and later replaced by the more powerful Long March 3A, which has an improved third stage.

List of launches[edit]

Flight number Date (UTC) Payload Orbit Result
1 1984, January 29 Shiyan Weixing 1 (900 kg) GTO (intended) Partial Failure
2 1984, April 8 Shiyong Tongbu Tongxin Weixing X (915 kg) GTO Success
3 1986, February 1 Shoyong Tongbu Tongxin Weixing 1 (Chinasat 1) (915 kg) GTO Success
4 1988, March 7 Shoyong Tongbu Tongxin Weixing 2 (Chinasat 2) (1024 kg) GTO Success
5 1988, December 22 Shoyong Tongbu Tongxin Weixing 3 (Chinasat 3) (1024 kg) GTO Success
6 1990, February 4 Shoyong Tongbu Tongxin Weixing 4 (Chinasat 4) (1024 kg) GTO Success
7 1990, April 7 Asiasat 1 (Westar 6) (1442 kg) GTO Success
8 1991, December 28 Shoyong Tongbu Tongxin Weixing 5 (Chinasat 5) (1025 kg) GTO (intended) Failure
9 1994, July 21 Apstar 1 (1383 kg) GTO Success
10 1996, July 3 Apstar 1A (1400 kg) GTO Success
11 1996, August 18 Zhongxing 7 (Chinasat 7 (1350 kg) GTO (intended) Failure
12 1997, June 10 Feng Yun 2A (1380 kg) GTO Success
13 2000, June 25 Feng Yun 2B (1400 kg) GTO Success

Launch failures[edit]

Shiyang Weixing 1 launch failure[edit]

On January 29, 1984, a LM-3 rocket failed during launch. Third stage failed 4 s after restart for GTO insertion of the satellite, because of incorrect mixture ratio in the engine gas generator, which caused high temperatures and burned out the turbine shell. However, many planned tests on the experimental communications spacecraft were still carried out in the resulting elliptical orbit.

Chinasat 5 launch failure[edit]

On December 28, 1991, a LM-3 rocket failed during launch. The third-stage engine suffered a loss of turbine speed and combustion pressure 58 s after reigniting for the second burn for GTO insertion and shut down completely 135 s after reignition. Loss of pressure in the high-pressure helium supply used for engine control had reduced the propellant flow.

Chinasat 7 launch failure[edit]

On August 18, 1996 a LM-3 rocket failed during launch. The third-stage engine shut down roughly 40 s earlier than planned because of a fire in the LH2 injector of the gas generator. Insufficient purging had permitted oxygen to freeze in the gas generator during flight.

References[edit]

  1. ^ a b c Mark Wade. "CZ-3". Encyclopedia Astronautica. Retrieved 2008-04-27. 
  2. ^ a b Gunter Krebs. "CZ-3 (Chang Zheng-3)". Gunter's Space Page. Retrieved 2008-04-27. 

External links[edit]