Long March 4A
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The Long March 4A (Template:Zh), also known as the Changzheng 4A, CZ-4A and LM-4A, sometimes misidentified as the Long March 4 due to the lack of any such designated rocket, was a Chinese orbital carrier rocket. It was launched from Launch Area 7 at the Taiyuan Satellite Launch Center. It was a three-stage rocket, used for two launches in 1988 and 1990. On its maiden flight, on 6 September 1988, it placed the FY-1A weather satellite into orbit. On its second, and final, flight it launched another weather satellite, FY-1B.
A month after the launch of FY-1B, the third-stage of the CZ-4A launch vehicle exploded in a 895 x 880 km orbit, creating more than 100 pieces of space debris.[1] This incident led to a redesign of the rocket to include a residual propellant venting system. A venting system was not included in the 4A because of the concern that it would damage the satellite.
It was replaced by a derivative, the Long March 4B, which first flew in 1999. The Long March 4B offers a more powerful third stage, and a larger payload fairing.
List of launches
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| Flight No. | Date (UTC) | Launch site | Payload | Orbit | Result |
|---|---|---|---|---|---|
| 1 | September 6, 1988 20:30 |
LA-7, TSLC | Fengyun 1A | SSO | Template:Success |
| 2 | September 3, 1990 00:53 |
LA-7, TSLC | Fengyun 1B | SSO | Template:Success |
References
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