1. Basic information<\/p>\n
Long March 5B was developed based on the Long March 5 launch vehicle. The First Academy of Aerospace Science and Technology is the overall unit, and the Eighth Academy of Aerospace Science and Technology is responsible for the research. It is my country’s first large-scale cryogenic rocket to implement “zero window” launch. As my country’s new generation launch vehicle with the largest low-Earth orbit carrying capacity, Long March 5B is also my country’s first one-stage and a half configuration rocket. It has few stages, no separation between stages, a simple system and high reliability.<\/p>\n
Altitude \uff5c Core stage diameter \uff5c Mass \uff5c Number of stages \uff5c Low Earth orbit load<\/p>\n
53.657m \uff5c 5m \uff5c About 849t \uff5c Level 1 and a half \uff5c >25t<\/p>\n
2. Rocket composition<\/p>\n
(1) Fairing<\/p>\n
1.Basic parameters<\/p>\n
Diameter | Length | Effective clear space diameter | Volume<\/p>\n
5.2m \uff5c 20.5m \uff5c 4.5m \uff5c \uff1e345 m3<\/p>\n
2.Separation plan<\/p>\n
The fairing is separated by rotation.<\/p>\n
(2) Core level one<\/p>\n
1.Basic parameters<\/p>\n
Diameter \uff5c Length \uff5c Filling volume \uff5c Propellant<\/p>\n
5m | 33.158m | 166.66t | Liquid hydrogen and liquid oxygen<\/p>\n
2.Supercharging system<\/p>\n
The first stage of the core adopts an autogenerated pressurization system, the liquid oxygen tank adopts an open autogenerated pressurization scheme, and the liquid hydrogen tank adopts a closed autogenerated pressurization scheme.<\/p>\n
3.Engine system<\/p>\n
The core stage uses two double-swing YF-77 hydrogen-oxygen engines. The engines use a gas generator cycle. The sea level thrust is 52.8t, the specific impulse is 316.7s, the vacuum thrust is 71.4t, the vacuum specific impulse is 428s, and the thrust-to-weight ratio is 38.4.<\/p>\n
4. Related improvements<\/p>\n
Compared with the Long March 5, the Chang 5B has adjusted its structural plan and successfully reduced its weight by about 400kg by using lightweight carbon fiber composite materials combined with an aluminum honeycomb sandwich.<\/p>\n
(3) Booster<\/p>\n
1.Basic information<\/p>\n
Diameter \uff5c Length \uff5c Filling quantity \uff5c Take-off mass \uff5c Propellant<\/p>\n
3.35m \uff5c 27.6m \uff5c 142.8t \uff5c 156.6t \uff5c Liquid oxygen kerosene<\/p>\n
2.Supercharging system<\/p>\n
The liquid oxygen tank is heated and pressurized by normal-temperature helium. The helium cylinder is installed inside the nose cone. After being heated by the helium heater, it enters the storage tank for pressurization. The kerosene tank is pressurized by normal-temperature helium, and the gas cylinder is installed on the inter-box section.<\/p>\n
3.Engine system<\/p>\n
The booster engine is a YF-100FHII liquid oxygen\/kerosene engine (composed of two YF-100 engines and a dual machine frame). It adopts an oxygen-rich pre-combustion staged combustion cycle, with a sea level thrust of 124.8t, a specific impulse of 300s, a vacuum thrust of 136.7t, and a specific impulse of 335s.<\/p>\n","protected":false},"excerpt":{"rendered":"
1. Basic information Long March 5B was developed based on the Long March 5 launch vehicle. The First Academy of Aerospace Science and Technology is the overall unit, and the Eighth Academy of Aerospace Science and Technology is responsible for the research. It is my country’s first large-scale cryogenic rocket to implement “zero window” launch. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[2],"tags":[],"class_list":["post-25496","post","type-post","status-publish","format-standard","hentry","category-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/25496"}],"collection":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/comments?post=25496"}],"version-history":[{"count":0,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/posts\/25496\/revisions"}],"wp:attachment":[{"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/media?parent=25496"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/categories?post=25496"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/starpath.global\/blog\/wp-json\/wp\/v2\/tags?post=25496"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}