Current plans call for the Long March 9 to have a maximum payload capacity of 150,000 kg to low Earth orbit (LEO) and 54,000 kg to trans-lunar injection.[3][4] Its first flight is expected to occur around 2030, in advance of possible Chinese crewed lunar missions sometime during the 2030s.[5][2]
History
2016, early design
The CZ-9 was initially designed as a three-staged rocket, with a first-stage core diameter of 10 meters and using a cluster of four engines. Multiple variants of the rocket have been proposed, with CZ-9 being the largest: this 'base variant' has four additional liquid-fuel boosters strapped onto the core stage (each individual booster would be up to 5 meters in diameter) and it is this variant that has the aforementioned LEO payload capacity of 140,000 kg. In addition to the base variant, there is the CZ-9A variant which has only two additional boosters and an LEO payload capacity of 100,000 kg. Finally, there is the CZ-9B having only the bare 10-meter diameter core stage and an LEO payload capacity of 50,000 kg.[6] The expected payload capacities of the Long March 9 place it in the class of the super heavy-lift launch vehicle; the rocket's development program was formally approved by the Chinese government in 2021.[2]
2021, new design
Long March 9 design as of 2021
On 24 June 2021, Long Lehao, chief designer of the Long March series, provided some updates regarding the Long March 9 at the University of Hong Kong in a presentation titled "Long March Rocket and China's Aerospace". The original design, called the 11th version (2011), had been supplanted by a new design, called the 21st version, which featured many changes, including an enlarged diameter of 10.6 meters, a length of 108 meters, and a weight of 4,122 tons. 16 YF-135 liquid oxygen kerosene engines, each with over 300 tons of thrust, will be used in the first stage; 120-ton hydrogen-oxygen engines will be used in the second and third stages, with four in the second stage and one in the third stage. All fuel tanks were changed to a common bulkhead design, and all external boosters had been removed. The payload capacity to low Earth orbit was increased from 140 to 150 metric tons, and the payload to trans-lunar injection was increased to 53 tons. Long noted that this new version was still under review at the time of the presentation.[7][8]
The new design is seen as being more suitable for first stage reuse, and is a response to SpaceX's Starship.[9] (The 2011 design for LM9 is seen as matching USA's Space Launch System.)[9]
2022, reusable
On 23 April 2022, Long Lehao, chief designer of the Long March series, provided some updates regarding yet another new design for the Long March 9. This one, referred to as Version 22, is a reusable, booster-less design very similar to Version 21. The second stage and third stages will be powered by 120-tonne hydrolox engines, just like Version 21. Four engines are on the second stage and one engine is in the third stage. However, the first-stage and second-stage core diameters have been increased to 11 meters, while the third-stage diameter is 7.5 meters. The total length has been increased to 111 meters, with a mass of 4122 tonnes. The first stage will be powered by twenty-six 200-tonne methane/LOX engines instead of the YF-135 engine from the previous design. Payload capacities are 150 tonnes to LEO and 50 tonnes to TLI.[10][11]
During October 2022, Long Lehao once again disclosed the new design of the Long March 9. The diameter of the first and second stages of the new version changed back to 10.6 meters, the diameter of the third stage became the same as the first and second stages, the total length increased to 114 meters, and the first stage power was changed to twenty-four of 240 tons kerosene/LOX engine. The payload capacity is 100-160 tonnes to LEO, and 35-53 tonnes to TLI.[12]
2023
During a presentation at the Nanjing University of Science and Technology in March 2023,[3][4] Long Lehao presented yet other modification to the plans. The reusable first stage is now powered by 30 200-tonne-thrust rocket engines burning methane and liquid oxygen, while the expendable second stage uses 2 engines of the same type. The third stage is optional and uses a single 120-tonne-thrust liquid hydrogen/liquid oxygen staged combustion engine named the YF-91. Long-term plans exist to make the 2nd stage reusable as well.
In April 2023 a new presentation by CALT shows the 3rd stage as powered by 4 YF-79 expander cycle liquid hydrogen/liquid oxygen engine instead, each of 25-tonne thrust. [13]
This Template lists historical, current, and future space rockets that at least once attempted (but not necessarily succeeded in) an orbital launch or that are planned to attempt such a launch in the future
Symbol † indicates past or current rockets that attempted orbital launches but never succeeded (never did or has yet to perform a successful orbital launch)
People's Republic of China
