The 25-ton hydrogen-oxygen engine adopts a closed expansion cycle system scheme, which has the advantages of high performance and high reliability, and has the ability of multiple starts and large-scale variable thrust adjustment. It is the preferred power for the upper stage of large and heavy launch vehicles and space vehicles. It can be used for complex space missions such as manned moon landing, manned fire landing and deep space exploration.
This type of engine is the expansion cycle hydrogen-oxygen upper stage engine with the largest thrust in the world.The specific impulse and other performance indicators have been significantly improved, reaching the world’s advanced level.
The YF-75D engine used on my country’s Long March 5 rocket is an expansion cycle engine, but there is still a certain gap compared with the international advanced level, the specific impulse is low, it does not have the ability to adjust the thrust in a large range, and the number of starts is low. The 25-ton closed expansion cycle hydrogen-oxygen engine is the second expansion cycle engine in my country.
In August, the Aerospace Science and Technology Group revealed that my country is currently developing a new generation of manned launch vehicles and heavy-duty launch vehicles (the legendary Long March 9), which will undertake manned moon landings, Mars exploration, Jupiter exploration, and asteroid exploration in the future. Task.
Among them, a new generation of manned launch vehicles will have the ability to send Chinese people to the moon around 2030.
The Moon Transfer Orbit launch capacity of the heavy launch vehicle will be increased to 50 tons to support lunar development activities.