Long March 11
| Function | Small-lift launch vehicle |
|---|---|
| Manufacturer | CALT |
| Country of origin | China |
| Size | |
| Height | 20.8 m (68 ft) |
| Diameter | 2.0 m (6.6 ft) |
| Mass | 58,000 kg (128,000 lb) |
| Stages | 4 |
| Capacity | |
| Payload to LEO | |
| Mass | 700 kg (1,500 lb) |
| Payload to SSO 700km | |
| Mass | 350 kg (770 lb) |
| Associated rockets | |
| Family | Long March |
| Comparable | Minotaur I, Pegasus, Start-1 |
| Launch history | |
| Status | Active |
| Launch sites | Jiuquan Xichang Special converted barge, Yellow Sea |
| Total launches | 18 |
| Success(es) | 18 |
| First flight | 25 September 2015 |
| Last flight | 8 November 2025 (most recent) |
| First stage – P35 | |
| Powered by | 1 Solid |
| Maximum thrust | 1,200 kilonewtons (270,000 lbf) |
| Burn time | 71 seconds |
| Second stage – Solid | |
| Powered by | 1 Solid |
| Third stage – Solid | |
| Powered by | 1 Solid |
| Fourth stage – Solid | |
| Powered by | 1 Solid |
The Long March 11 (Chinese: 長征十一號運載火箭), or Chang Zheng 11 as in pinyin, abbreviated LM-11 for export or CZ-11 within China (and designated 11H when launched from sea), is a Chinese four stage solid-propellant carrier rocket of the Long March family, which is developed by the China Aerospace Science and Technology Corporation. It was designed as a "quick reaction" rocket with the ability to launch on short notice, from road vehicles (CZ-11) and ships (CZ-11H).
Based on a number of design similarities, it is believed the rocket was developed from the DF-31 ICBM, by adding an additional solid propelant 4th stage to the 3 stage missile. This is what gives it its quick launch capabilities, as it can be stored for a longer time than liquid-fueled rockets, and then quickly cold launched from a launch tube, from a sea barge or road mobile vehicle.
The maiden flight of the Long March 11 occurred on 25 September 2015. The first sea launch occurred on 5 June 2019, from a converted barge stationed in the Yellow Sea. Eighteen launches have been made as of December 2025, six of them from sea.