The possible capacity of Long March 5

Long March rocket (长征) is a family of expendable launch systems operated by China. Development and design falls under the auspices of the China Academy of Launch Vehicle Technology. In English, the rockets are abbreviated as LM- for export and CZ- within China. The rockets are named after the Long March of Chinese communist history.

The expected next LM rocket is LM5, but its configuration is unknown yet. According to a post appeared at war-sky.com (no long available), the possible configurations are:

Design A B C D E F
Rocket Height/m 58 54 48 55 53 43
Diameter/m 7.85 7.85 3.35 7.85 7.85 3.35
Length-Diameter Ratio 7.4 6.9 14.3 7 6.8 12.8
Number of Motors 10 8 4 12 10 6
Gross Weight/t 540 380 195 520 390 203
Liftoff Thrust/kN 7200 4800 2400 7200 4800 2400
Thrust Weight Ratio 1.36 1.29 1.26 1.41 1.26 1.21
Carrying Capacity/t 10(LEO) 6(LEO) 3.0(LEO) 6(GTO) 4(GTO) 1.8(GTO)
Carrying Capacity/t 14(LEO) 8(LEO) 4.3(LEO) 7(GTO) 4(GTO) 2.1(GTO)

One of the reasons for new design is to build Chinese space station. Here is a well written blog post: “Chinese To Fly Their Own Space Station“.

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