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Drawing of Long March 3C
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| Function | Carrier rocket |
|---|---|
| Manufacturer | CALT |
| Country of origin | China |
| Size | |
| Height | 54.8 metres (180 ft) |
| Diameter | 3.35 metres (11.0 ft) |
| Mass | 345,000 kilograms (761,000 lb) |
| Stages | 3 |
| Capacity | |
| Payload to GTO |
3C: 3,800 kilograms (8,400 lb) 3C/E: 3,900 kilograms (8,600 lb) |
| Payload to HCO | 2,400 kilograms (5,300 lb) |
| Associated rockets | |
| Family | Long March |
| Launch history | |
| Status | Active |
| Launch sites | LA-2 & LA-3, XSLC |
| Total launches | 15 |
| Successes | 15 |
| First flight | 25 April 2008 |
| Boosters (3C) | |
| No. boosters | 2 |
| Length | 15.33 m (50.3 ft) |
| Diameter | 2.25 m (7 ft 5 in) |
| Propellant mass | 37,700 kg (83,100 lb) |
| Engines | 1 YF-25 |
| Thrust | 740.4 kN (166,400 lbf) |
| Specific impulse | 2,556.2 m/s (260.66 s) |
| Burn time | 127 s |
| Fuel | N2O4/UDMH |
| Boosters (3C/E) | |
| No. boosters | 2 |
| Length | 16.1 m (53 ft) |
| Diameter | 2.25 m (7 ft 5 in) |
| Propellant mass | 41,100 kg (90,600 lb) |
| Engines | 1 YF-25 |
| Thrust | 740.4 kN (166,400 lbf) |
| Specific impulse | 2,556.2 m/s (260.66 s) |
| Burn time | 140 s |
| Fuel | N2O4/UDMH |
| First stage (3C) | |
| Length | 23.27 m (76.3 ft) |
| Diameter | 3.35 m (11.0 ft) |
| Propellant mass | 171,800 kg (378,800 lb) |
| Engines | 4 YF-21C |
| Thrust | 2,961.6 kN (665,800 lbf) |
| Specific impulse | 2,556.5 m/s (260.69 s) |
| Burn time | 145 s |
| Fuel | N2O4/UDMH |
| First stage (3C/E) | |
| Length | 24.76 m (81.2 ft) |
| Diameter | 3.35 m (11.0 ft) |
| Propellant mass | 186,200 kg (410,500 lb) |
| Engines | 4 YF-21C |
| Thrust | 2,961.6 kN (665,800 lbf) |
| Specific impulse | 2,556.5 m/s (260.69 s) |
| Burn time | 158 s |
| Fuel | N2O4/UDMH |
| Second stage | |
| Length | 12.92 m (42.4 ft) |
| Diameter | 3.35 m (11.0 ft) |
| Propellant mass | 49,400 kg (108,900 lb) |
| Engines | 1 YF-24E (YF-22E (Main) 4 x YF-23C (Vernier)) |
| Thrust | 742 kN (167,000 lbf) (Main) 47.1 kN (10,600 lbf) (Vernier) |
| Specific impulse | 2,922.57 m/s (298.019 s) (Main) 2,910.5 m/s (296.79 s) (Vernier) |
| Burn time | 185 s |
| Fuel | N2O4/UDMH |
| Third stage | |
| Length | 12.38 m (40.6 ft) |
| Diameter | 3.0 m (9.8 ft) |
| Propellant mass | 18,200 kg (40,100 lb) |
| Engines | 1 YF-75 |
| Thrust | 167.17 kN (37,580 lbf) |
| Specific impulse | 4,295 m/s (438.0 s) |
| Burn time | 478 s |
| Fuel | LH2/LOX |
The Long March 3C (simplified Chinese: 长征三号丙火箭; traditional Chinese: 長征三號丙火箭; pinyin: Chángzhēng Sānhào Bǐng Huǒjiàn), also known as the Changzheng 3C, CZ-3C and LM-3C, is a Chinese orbital carrier rocket. It is launched from Launch Complex 2 at the Xichang Satellite Launch Centre. A 3-stage rocket with two strapon liquid rocket boosters, it is a member of the Long March 3 rocket family, and was derived from the Long March 3B. It was designed to fill a gap in payload capacities between the Long March 3A and 3B.
It made its maiden flight on 25 April 2008, at 15:35 GMT. The payload for the first launch was the Tianlian-1 data relay communications satellite. The second carried the Compass-G2 navigation satellite, and was conducted on 14 April 2009. The third launch was made on 16 January 2010, with the Compass-G1 satellite. The fourth carrying the Compass-G3 navigation satellite was launched on 2 June 2010. On 1 October 2010, it successfully launched China's second lunar probe, Chang'e 2.
An enhanced version of the Long March 3C rocket debuted during the launch of Chang'e 5-T1 on 23 October 2014. On 30 March 2015 the Yuanzheng-1 upper stage was used on top of a Long March 3C rocket for the first time.