China's Largest Rocket CZ-5 ... Maiden Launch 20:42 November 3, 2016!

[twocents]

I know, but the more you see them bragging, the more annoying I feel.

Why would you be annoyed? Relax and have a sense of humor. At least that's how I would feel.

 

[AndrewJin]

I know, but the more you see them bragging, the more annoying I feel.

Just relax and laugh....
The more such people exist, the more their country is fkcked up.
Remember their 2012 president?
What can u expect from non-president?

 

[Anders]

 

[Anders]

 

[boxer_B]

Congratulations China !!

India should also try to achieve higher payload to LEO and GTO by incorporating RD-120 / RD-170 Russian engines in GSLV instead of using ESA. We can name it GSLV MK 5.

 

[cirr]

Cool tech(new concept space structure, an original breakthrough technology) onboard SJ-17

“天方一号”新概念航天结构成功发射　国防科大在航天结构技术领域实现原创性突破

新华社海南文昌１１月３日电（王握文、章飞钹）由国防科学技术大学自主研制的“天方一号”新概念航天结构，３日搭载“实践十七号”卫星，由我国首个大推力运载火箭“长征五号”发射升空。

遥测数据表明，“天方一号”在火箭起飞、级箭分离、星级分离、卫星太阳翼展开等过程中，呈现出优异的减振性能和电磁兼容特性。国防科学技术大学相关专家表示，“天方一号”研制成功并通过发射技术验证，对提高航天器有效载荷比、延长航天器工作寿命、缩短航天器研制周期、拓展航天器功能等具有重要意义，标志着我国在新概念航天结构技术领域实现原创性突破。

“天方一号”采用多功能一体化设计，主要由轻型复合承载结构、高分子多功能支撑结构群、聚合物固态锂离子电池模块、振动与温度监管装置等组成。它集高强度承载、反共振控制、结构化能源等功能为一体，在承载、减振、能源、热控等一体化设计，电磁兼容、锂电池异构成型等方面取得多项原创性关键技术突破。

国防科学技术大学相关专家介绍，传统航天结构设计存在部件功能单一、单机数量多、空间利用率低、冗余质量大、设计制造周期长等诸多局限，严重制约了我国航天技术的快速发展。国防科学技术大学航天结构技术创新团队从１９９６年开始对此进行研究探索，突破并掌握了高载荷比、高能量密度比、多功能一体化的新概念航天结构技术，自主设计并研制出兼具力能与环境管理的一体化多功能航天结构，具有数据处理、信息融合与天地交互综合功能的数据处理模块，集能源管理与控制、电性能检测与调理、信号传输与处理等功能于一体的电源管理模块。

“天方一号”完成发射阶段技术验证后，后续将伴随“实践十七号”卫星进行新型结构化能源模块的在轨技术验证。

@Bussard Ramjet

大公网11月4日讯（记者刘凝哲文昌报道）中国新一代运载火箭长征五号3日20点43分在文昌航天发射场腾空而起，它的乘客——由实践十七号卫星和远征二号上面级组成的载荷组合体已成功进入预定轨道。记者从国防科工局、国家航天局获悉，实践十七号卫星将开展地球同步轨道通信广播业务，并择机开展空间碎片观测、新型电源、电推进等多项新技术验证工作。

作为长五大火箭的首批乘客，实践十七号卫星的“娘家”是中国空间技术研究院。该院介绍，“实践十七号”，是一颗同步轨道新技术试验卫星，采用东方红四S平台，体重近4吨。卫星总设计师王典军表示，此次在长五首飞任务中进行搭载试验，对提高中国高轨卫星技术发展、拉动大型新平台尤其是东方红五号平台的关键技术具有重大意义。

实践十七号卫星如同一个“小型实验室”，试验的项目可谓“高精尖”。王典军表示，目前，航天器上的太阳能电池多采用单结或三结砷化镓制成，其转化效率最高在30%左右。实践十七号卫星要验证的一项新技术就是新型能源技术。科研人员将之前太阳能电池片的材料升级为四结砷化镓和倒装砷化镓，以验证其在太空里的适应性。航天器上的太阳能转化效率每提高1%，都将极大地提升经济效益。同时，电池片单位面积利用率愈高，愈有助于航天器的减重。

AND基于无毒推进技术是中国近年来研发的一种新型推进技术，此次也出现在实践十七号卫星搭载项目的名单中。据介绍，不同于传统卫星推进剂，AND推进剂具有无毒、高密度、低冰点、低发挥性、高性能等特点。据了解，这次任务中的无毒推进子系统是中国第一套星上应用的无毒推进系统，其在轨飞行将对新型推进技术和东方红五号平台贮箱等关键技术展开试验。”

此外，实践十七号卫星此次升空还承担着试验高轨空间碎片观测技术的任务。太空碎片由退役、失效的空间飞行器形成，目前地球同步轨道的碎片已有上千个，且还在日益增加，这对太空环境极为不利。实践十七号的升空也许会为解决这一太空环境难题，带来新的答案。

 

[rott]

I know, but the more you see them bragging, the more annoying I feel.

I've even lost words for those braggers . I tell you, they are certainly not from this planet.

 

[qwerrty]

development team. no dinosaur

 

[cirr]

CHINA LAUNCHES THE LONG MARCH 5, ITS LARGEST EVER ROCKET


THE 879-TON ROCKET FLEW AN EXPERIMENTAL SATELLITE INTO SPACE

By Jeffrey Lin and P.W. Singer 9 hours ago

New China

Launch

Making history, the Long March 5 is China's largest ever rocket, with a 25 ton LEO payload. It'll be a key stepping stone for Chinese space projects like a space station and extra-planetary rovers.

China's taken another leap forward, with the launch of its largest ever rocket, the Long March 5 ("Chang Zheng 5" in Chinese) on November 3.

CCTV 2, via =GT

Shijian 17

Shijian 17, which just launched on the LM-5, is an experimental satellite testing electrical propulsion. It is boosted to GEO by the conically shaped space tug. Electrical propulsion is useful for satellites, as using ionic thrusters for maneuvering and orbit-keeping saves a lot of weight compared to chemically fueled boosters.

Built by the Chinese Academy of Launch Vehicle Technology, the heavy space launch LM-5 has a thrust of 1060 tons and a massive payload capacity of 25 tons, putting it in the same class as global heavyweights like the American Atlas V, Delta IV Heavy and European Ariane V. The LM-5 carried the experimental Shijian 17 electronic propulsion satellite into geostationary orbit (GEO).

CASIC

Long March Rocket Family

This graphic goes into detail on the various Long March 5 variants, including the 25 ton payload to low Earth orbit, and 14 ton payload to geostationary transfer orbit (GTO). The latter rockets are taller since they have an additional stage to reach the higher orbit.

Originally, there would have been six LM-5 variants, but they have been superseded by the Long March 6, which first flew in September 2015, and Long March 7 in June 2016. Together, the Long March 5, 6 and 7 will be the workhorses of the modernized Chinese space launch program.

Space Flight Insider

Rollout

After nine years of research and development, the LM-5 rolled out in October 2016 for its first flight.

The LM-5's research and development phase began in 2007, followed by fabrication of the rocket fuselage, with integrated testing of components like fuel lines, propellant tanks, jetpumps and electronic controls, beginning November 2015. With a fuselage skin only 3 mm thick, the LM-5's safety features include doubly redundant critical systems, such as electronic controls. LM-5's rocket motors burn liquid oxygen and liquid hydrogen (LOX/LH), with only water as a byproduct, making it very environmentally friendly compared to previous Long March rockets, which used dinitrogen tetroxide and the carcinogenic unsymmetrical dimethylhydrazine.

CCTV 2

Core Stage

The core of the LM-5's first stage consists of a 5 meter diameter rocket with two LH/LOX YF-77 engines, each producing 120 tons of thrust, for a total 240 tons of thrust.

The LM-5 has a payload faring diameter of 5.2 meters, enabling it to carry much wider cargos than smaller previous Chinese rockets. This is critical for payloads like permanent space station modules and large diameter spy satellites. Both LM-5 variants have a 5 meter diameter for the first stage and uses four booster rockets. Each booster rocket has a thrust of over 140 tons from its twin YF-77 engines.

CCTV

Second Act

The LM-5E's second stage consists of two 10-ton thrust YF-75D engines for orbit maneuvers and power to break free of LEO to reach a GTO position.

The LM-5 that flew on November 3 was the Long March 5E variant, which is geared towards geostationary orbit (GTO) launches. In its first stage, it uses two 72-ton thrust YF-77 liquid hydrogen and oxygen engines in its core stage, assisted by its four boosters. Operating in the vacuum of deep space, the Yuanzheng 2 (YZ-2)"space tug" and second stage, powered by two 10-ton thrust YF-75D engines, places the payload into GEO. Objects in GEO are high enough to stay over the same geographical location, making them critical for activities which require continuous line of sight to specific areas, like communications and navigation.

CCTV

LM-5 Boosters

The Long March 5's four boosters each use twin YF-100 engines for a combined thrust of 240 tons from each booster. The role of boosters in space launch is to provide an initial surge of thrust to give momentum and velocity to the longer burning core stage.

In contrast, the Long March 5B deletes the second stage, but retains the same four booster set up. The weight savings from removing the second stage LM-5B enable it to carry 25 tons to low earth orbit (LEO), including massive payloads like space stations. In contrast, the previous Chinese rocket, the Long March 2, could only carry 10 ton payloads into LEO.

xyz at China Defense Forum

China's Martian rover will come equipped with various scientific tools and instruments, such as a laser spectrometer. In addition to meeting the demands of Martian environmental challenges like atmospheric interference with solar power collection, Chinese scientists hope the rover will make new discoveries about Martian characteristics like weather and geology. Only the LM-5E's large GTO payload can launch the Chinese Martian rover for its 2018-2019 target date.

The LM-5 has a long mission manifest in the years to come. Next year, it's rumored to be launching a next generation Chinese military communications satellite to GEO, and then the Chang'e 5 lunar soil return mission and the Martian rover in 2018-19. More heavy lifting will follow, for the 20-ton modules of the Chinese permanent space station. Potential future missions after that include launching large spy satellites, and even a possible manned lunar mission involving multiple LM-5s.

http://www.popsci.com/china-launches-its-largest-ever-rocket-long-march-5

 

[onebyone]

GI's Commercial Space Operations Center (ComSpOC) is actively tracking China's Long March 5 launch, and the apparent two payloads entering orbit. This is, in part significant as press releases prior to the launch reportedly only registered one payload- the Shijian 17 experimental satellite. The characterization of the second object is still unknown, however COmSpOC has identified both objects making deliberate maneuvers. While these could be related to early orbit operations, the objects are in very unique & unusual orbits for typical operational spacecraft.

=====================================


AGI's Commercial Space Operations Center Tracks Long March 5 Payloads


http://spaceref.com/news/viewpr.html?pid=49817

 

[Dungeness]

GI's Commercial Space Operations Center (ComSpOC) is actively tracking China's Long March 5 launch, and the apparent two payloads entering orbit. This is, in part significant as press releases prior to the launch reportedly only registered one payload- the Shijian 17 experimental satellite. The characterization of the second object is still unknown, however COmSpOC has identified both objects making deliberate maneuvers. While these could be related to early orbit operations, the objects are in very unique & unusual orbits for typical operational spacecraft.

=====================================


AGI's Commercial Space Operations Center Tracks Long March 5 Payloads


http://spaceref.com/news/viewpr.html?pid=49817

Interesting!!!

 

[TaiShang]

GI's Commercial Space Operations Center (ComSpOC) is actively tracking China's Long March 5 launch, and the apparent two payloads entering orbit. This is, in part significant as press releases prior to the launch reportedly only registered one payload- the Shijian 17 experimental satellite. The characterization of the second object is still unknown, however COmSpOC has identified both objects making deliberate maneuvers. While these could be related to early orbit operations, the objects are in very unique & unusual orbits for typical operational spacecraft.

=====================================


AGI's Commercial Space Operations Center Tracks Long March 5 Payloads


http://spaceref.com/news/viewpr.html?pid=49817

November surprise?

 

[Ajaxpaul]

Congrats China. It will inspire India to achieve such milestones !!

 

[lonelyman]

Interesting!!!

Yuanzheng 2 upper stage
https://en.m.wikipedia.org/wiki/Yuanzheng-1

 

[qwerrty]

Chinese launch chilling 'carrier killer' rocket Long March-5 as it ups stakes in bid for dominance in Pacific

• 20:39, 3 Nov 2016
• Updated 21:05, 3 Nov 2016
• By Patrick Lion

http://www.mirror.co.uk/news/world-news/chinese-launch-chilling-carrier-killer-9190767