Long March 2 rocket family
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| Long March 2F | ||
|---|---|---|
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| Stages | 2 | |
| 0 - Boosters | Engines | YF - 20B x 4 |
| Thrust | 814 kN X 4 = 3,256 kN | |
| Burn time | 128 seconds | |
| Fuels | N2O4 / UDMH | |
| 1 - Core Stage | Engines | YF - 20B x 4 |
| Thrust | 814 kN X 4 = 3,256 kN | |
| Burn time | 166 seconds | |
| Fuels | N2O4 / UDMH | |
| 2 - 2nd Stage | Engine | YF - 25/23 |
| Thrust | 831 kN | |
| Burn time | 300 seconds | |
| Fuels | N2O4 / UDMH | |
| Launch vehicle | 1st Launch November 1999 | |
| Payload LEO 42 deg | 8,400 kg | |
| Payload GTO | 3,370 kg | |
Long March 2 rocket family is an expendable launch system operated by the People's Republic of China.
Development and design falls mostly under the auspices of the China Academy of Launch Vehicle Technology. The rockets are, confusingly, abbreviated both LM-2 family and CZ-2 family in English.
Long March 2 is the base model of the Long March 2 rocket family . The development work began in 1970, the first rocket was launched on November 5, 1974, but the launch failed. The production of the rocket ended in 1979.
Long March 2C and Long March 2D were also developed by the China Academy of Launch Vehicle Technology, the first launches occurred in 1982 and 1990 respectively.
The Long March 2E was developed by the Shanghai Space Agency, and was first launched in 1992.
The development of Long March 2F began in 1992, the first launch was in November 1999 (See also Shenzhou 1). This version is intended mainly for manned space missions and is the safest model in the Long March 2 family.
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[edit] Specifications
[edit] Long March 2F
- Stage number: 0 - Strap-on boosters x 4
- Stage number: 1 - Core stage
- Gross mass: 196,500 kg
- Empty mass: 9,500 kg
- Thrust (vac): 3,256 kN
- Isp: 289 seconds (2.8 kN·s/kg)
- Burn time: 166 seconds
- Diameter: 3.4 m
- Length: 23.7 m
- Propellants: N2O4 / UDMH
- Engine: 4 x YF - 20B
- Stage number: 2 - Final stage
- Gross mass: 91,500 kg
- Empty mass: 5,500 kg
- Thrust (vac): 831 kN
- Isp: 289 seconds (2.8 kN·s/kg)
- Burn time: 300 seconds
- Diameter: 3.4 m
- Length: 15.5 m
- Propellants: N2O4 / UDMH
- Engine: 1 x YF - 25/23
[edit] Specifications for earlier versions of the Long March 2 rocket family
| Model | Stages | Length (m) |
Max. diameter (m) |
Liftoff mass (t) |
Liftoff thrust (kN) |
Payload (LEO, kg) |
|---|---|---|---|---|---|---|
| Long March 2 | 2 | 31.170 | 3.35 | 190 | 2786 | 1800 |
| Long March 2C | 2 | 35.15 | 3.35 | 192 | 2786 | 2400 |
| Long March 2D | 2 | 33.667 (without shield) |
3.35 | 232 | 2962 | 3100 |
| Long March 2E | 2 (plus 4 Strap-on boosters) |
49.686 | 7.85 | 462 | 5923 | 9200 |
[edit] References
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