Long March 2E

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Long March 2E
CZ-2E.svg
Long March 2E
Function Carrier rocket
Manufacturer CALT
Country of origin  People's Republic of China
Size
Height 49.70 metres (163.1 ft)[1]
Diameter 3.35 metres (11.0 ft)[1]
Mass 460,000 kilograms (1,010,000 lb)[1]
Stages 3
Capacity
Payload to LEO 9,500 kilograms (20,900 lb)[1]
Payload to GTO 3,500 kilograms (7,700 lb)[1]
Associated rockets
Family Long March
Derivatives Long March 2F
Launch history
Status Retired
Launch sites LA-2, XSLC
Total launches 7
Successes 5
Failures 1
Partial failures 1
First flight 16 July 1990
Last flight 28 December 1995
Boosters
No. boosters 4
Length 15.33 m (50.3 ft)
Diameter 2.25 m (7 ft 5 in)
Empty mass 3,000 kg (6,600 lb)
Gross mass 40,754 kg (89,847 lb)
Propellant mass 37,754 kg (83,233 lb)
Engines 1 YF-20B
Thrust 740.4 kN (166,400 lbf)
Specific impulse 2,556.2 m/s (260.66 s)
Burn time 127 s
Fuel N2O4/UDMH
First stage
Length 28.47 m (93.4 ft)
Diameter 3.35 m (11.0 ft)
Empty mass 12,550 kg (27,670 lb)
Gross mass 198,825 kg (438,334 lb)
Propellant mass 186,280 kg (410,680 lb)
Engines 4 YF-20B
Thrust 2,961.6 kN (665,800 lbf)
Specific impulse 2,556.2 m/s (260.66 s)
Burn time 160 s
Fuel N2O4/UDMH
Second stage
Length 14.22 m (46.7 ft)
Diameter 3.35 m (11.0 ft)
Empty mass 4,955 kg (10,924 lb)
Gross mass 91,414 kg (201,533 lb)
Propellant mass 84,759 kg (186,862 lb)
Engines 1 YF-24B
(1 x YF-22B (Main))
(4 x YF-23B (Vernier))
Thrust 738.4 kN (166,000 lbf) (Main)
47.1 kN (10,600 lbf) (Vernier)
Specific impulse 2,922.4 m/s (298.00 s) (Main)
2,834.1 m/s (289.00 s) (Vernier)
Burn time 301 s
Fuel N2O4/UDMH
Third stage - EPKM(optional)
Length 2.936 m (9 ft 7.6 in)
Diameter 1.7 m (5 ft 7 in)
Empty mass 557 kg (1,228 lb)
Gross mass 6,001 kg (13,230 lb)
Propellant mass 5,444 kg (12,002 lb)
Engines 1 FG-46
Thrust 190 kN (43,000 lbf)
Specific impulse 2,870 m/s (293 s)
Burn time 87s
Fuel HTPB

The Long March 2E, also known as the Chang Zheng 2E, CZ-2E and LM-2E, was a Chinese orbital carrier rocket. Designed to launch commercial communications satellites, the Long March 2E was retired in favour of the Long March 3B, after two launch failures. Launched from complex 2 at the Xichang Satellite Launch Centre, it is a three-stage carrier rocket. The Long March 2E made its maiden flight on 16 July 1990, and was retired on 28 December 1995. It forms the basis of the Long March 2F, used to launch manned Shenzhou missions. The booster rockets have also been reused on the Long March 3B and Long March 3C.

Launches[edit]

The Long March 2E made its maiden flight on 16 July 1990 and made 7 launches in total. The first failed launch occurred on 21 December 1992, during the launch of the original Optus B2. Windshear caused the payload fairing to implode 45 seconds into flight. Despite this, the rocket continued on to orbit, and deployed what was left of the upper stage and payload into a low Earth orbit. The second failure occurred on 25 January 1995, during the launch of APStar 2. Again, windshear led to the collapse of the payload fairing, however on this occasion, the rocket exploded.

List of Launches[edit]

Flight number Date (UTC) Launch site Upper stage Payload Orbit Result
1 July 16, 1990
00:40
LA-2, XSLC SPTS-M14 Optus-B mass simulator
Badr-1
GTO
LEO
Success
2 August 13, 1992
23:00
LA-2, XSLC Star-63F Optus-B1 GTO Success[note]
3 December 21, 1992
11:21
LA-2, XSLC Star-63F Optus-B2 GTO Partial Failure
4 August 27, 1994
23:10
LA-2, XSLC Star-63F Optus-B3 GTO Success
5 January 25, 1995
22:40
LA-2, XSLC Star-63F APStar 2 GTO Failure
6 November 28, 1995
11:30
LA-2, XSLC EPKM AsiaSat 2 GTO Success
7 December 28, 1995
11:50
LA-2, XSLC EPKM Echostar 1 GTO Success

^note Original launch attempt on March 22, 1992 at 10:40 UTC was aborted after engine ignition due to one booster engine igniter shutdown after metal contaminants caused electric arcing. Launch vehicle suffered damage and had to be replaced.

References[edit]

  1. ^ a b c d e Mark Wade. "CZ-2E". Encyclopedia Astronautica. Retrieved 2008-05-02.