Yuanzheng was presented in a 2013 paper3 and performed its first mission on 30 May 2015. The debut flight of the Long March 7 in 2016 included an improved version called Yuanzheng-1A that can flexibly deploy multiple payloads into various target orbits.4 Further variants were later deployed for Long March 5 (YZ-2) in 2016, Long March 2C (YZ-1S) and Long March 2D (YZ-3) in 2018.
No.
Currently, there is known to be five versions:
Kun, Ma; Wu, Guo; Song, Guan; Zhibin, Ma; Tongyu, Li (2013). "上面级发展现状及趋势分析" [Development Status and Trend Analysis of Upper Stages]. Missiles and Space Vehicles (in Chinese). 6 (329): 24–28. doi:10.7654/j.issn.1004-7182.20130606 (inactive 1 November 2024).{{cite journal}}: CS1 maint: DOI inactive as of November 2024 (link) /wiki/Doi_(identifier) ↩
Norbert Bgügge. "YZ-1 space tug". B14643.DE. Archived from the original on August 25, 2015. Retrieved 2015-07-25. https://archive.today/20150825122058/http://www.b14643.de/Spacerockets_1/China/CZ-NGLV/Propulsion/spacetug.htm ↩
"长征七号首飞成功 空间实验室任务大幕拉开" [Successful maiden flight of the Long March 7 mission Damulakai]. www.spacechina.com (in Chinese). 2016-06-25. Archived from the original on 28 June 2016. Retrieved 2016-06-25. https://web.archive.org/web/20160628013425/http://www.spacechina.com/n25/n144/n206/n214/c1339839/content.html ↩
"升级版的中国"太空摆渡车"将带来什么?" [What will enable the upgraded space bus?]. www.chinanews.com (in Chinese). 2016-06-25. Retrieved 2016-06-27. http://www.chinanews.com/gn/2016/06-25/7917513.shtml ↩
"远征一号上面级" [Yuanzheng-1 Upper Stage]. www.chinaspaceflight.com (in Chinese). 2016-06-07. Retrieved 2016-06-30. http://www.chinaspaceflight.com/rocket/upper-stage/YZ-1/yuanzheng1.html ↩
"远征一号甲上面级(YZ-1A)" [Yuanzheng-1A Upper Stage (YZ-1)]. www.chinaspaceflight.com (in Chinese). 2016-06-26. Retrieved 2016-06-30. http://www.chinaspaceflight.com/rocket/upper-stage/YZ-1/yuanzheng1.html ↩
"远征二号上面级:今年发射的"长征五号"火箭将启用新研制上面级"远征二号"" [Yuanzheng-2 upper stage: this year's launch of the Long March 5 rocket upper stage will enable the development of new "Yuanzheng-2"]. www.chinaspaceflight.com (in Chinese). 2016-03-30. Retrieved 2016-06-30. http://www.chinaspaceflight.com/rocket/upper-stage/67.html ↩