Chinese Long March Rocket Launch Collection
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samsara
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The cool pic of 拉面 lamian or pulled noodles 
Today's Long March 8 launch from Our Space: https://weibo.com/6528178851/JzDDYuh11
Photo by @goneless
According to the chief designer of CZ-8, after 2022 the annual launch capacity of CZ-8 will be 30. Sounds like the CZ-2 and CZ-4 carrier rockets will retire then.
weibointl.api.weibo.com
Today's Long March 8 launch from Our Space: https://weibo.com/6528178851/JzDDYuh11
Photo by @goneless
According to the chief designer of CZ-8, after 2022 the annual launch capacity of CZ-8 will be 30. Sounds like the CZ-2 and CZ-4 carrier rockets will retire then.
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weibointl.api.weibo.com
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So CZ-7 will retired too? Last launch is a disaster. CZ-8 takeover all mission?The cool pic of 拉面 lamian or pulled noodles
Today's Long March 8 launch from Our Space: https://weibo.com/6528178851/JzDDYuh11
Photo by @goneless
View attachment 698816
According to the chief designer of CZ-8, after 2022 the annual launch capacity of CZ-8 will be 30. Sounds like the CZ-2 and CZ-4 carrier rockets will retire then.
View attachment 698818
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Crystal-Clear
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samsara
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From Taxiya /SDF about CZ-8, CZ-7 and reusability:
So if Long March-8 is more or less identical to Long March-722HO, how come they're split up into two rocket families like that?
Is it just Long March-8 has reusability in mind while Long March-7 doesn't? Would there ever be any consideration for Long March-8R with four boosters or 3rd stage?
The numbering of 7 and 8 is not much of specific or technical reason. Earlier on the CZ-3 and CZ-4 had the similar story, where CZ-4 was an alternative solution for CZ-3 (hypergolic 3rd stage instead of LH2/LOX), but later got its own number. To be precise, CZ-722HO is renamed to be CZ-8, they are the same thing, it is only a numbering change.
The CZ-7 has reusability in mind too. But everything depends on CZ-8R's successful verification of bundled landing. CZ-8R is the pioneer program for all possible reusable rocket development or modification.
There will never be CZ-8 being three stages. Three stage is only within CZ-7 series, CZ-8 is the two-stage variant. I highly doubt there will be a CZ-8 with four boosters either, because CZ-7 basic (two stages) variant has four boosters. High takeoff lift/mass is good for LEO, which is not CZ-8's designed target area.
Chief designer of CZ-8 talked about "launching a small (down-sized) rocket experimenting VTVL in 2021". According to his word, it is not really small, it is still still 3.35m in diameter. As I understand it, it may be a single core stage. Since YF-100 can not be throttled down enough and Thrust-Mass ratio without boosters are too high, they may put some dead weight on it. The purpose is apparently test everything in near real-life before launching CZ-8R in its full setup.
As others have said that you don't have to use an engine deep down to 10%. Falcon 9 is an example, Merlin could go down to only 50% ???. SpaceX uses 9 engines and only runs the center one at landing bypassing the 10% requirement. The planned CZ-6X (another effort of VTVL) uses two smaller engines for landing. The 921 has 7 engines in each core, YF-100 in its current form when using only one for landing is already good enough.
Besides, there is a study that looking into making YF-100 to 10%.
So if Long March-8 is more or less identical to Long March-722HO, how come they're split up into two rocket families like that?
Is it just Long March-8 has reusability in mind while Long March-7 doesn't? Would there ever be any consideration for Long March-8R with four boosters or 3rd stage?
The numbering of 7 and 8 is not much of specific or technical reason. Earlier on the CZ-3 and CZ-4 had the similar story, where CZ-4 was an alternative solution for CZ-3 (hypergolic 3rd stage instead of LH2/LOX), but later got its own number. To be precise, CZ-722HO is renamed to be CZ-8, they are the same thing, it is only a numbering change.
The CZ-7 has reusability in mind too. But everything depends on CZ-8R's successful verification of bundled landing. CZ-8R is the pioneer program for all possible reusable rocket development or modification.
There will never be CZ-8 being three stages. Three stage is only within CZ-7 series, CZ-8 is the two-stage variant. I highly doubt there will be a CZ-8 with four boosters either, because CZ-7 basic (two stages) variant has four boosters. High takeoff lift/mass is good for LEO, which is not CZ-8's designed target area.
Chief designer of CZ-8 talked about "launching a small (down-sized) rocket experimenting VTVL in 2021". According to his word, it is not really small, it is still still 3.35m in diameter. As I understand it, it may be a single core stage. Since YF-100 can not be throttled down enough and Thrust-Mass ratio without boosters are too high, they may put some dead weight on it. The purpose is apparently test everything in near real-life before launching CZ-8R in its full setup.
As others have said that you don't have to use an engine deep down to 10%. Falcon 9 is an example, Merlin could go down to only 50% ???. SpaceX uses 9 engines and only runs the center one at landing bypassing the 10% requirement. The planned CZ-6X (another effort of VTVL) uses two smaller engines for landing. The 921 has 7 engines in each core, YF-100 in its current form when using only one for landing is already good enough.
Besides, there is a study that looking into making YF-100 to 10%.
samsara
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From 中国航天旅游 @Longmarch13 on 2020.12.26:
【发射预报】中国航天2020年最后一次发射任务。
火箭:长征四号丙 遥二十五
载荷:遥感三十一号02组卫星
轨道:SSO
发射场:中国酒泉卫星发射中心
时间:12月27日23:40（北京时间）
[Launch forecast] The last launch mission of China Aerospace in 2020.
Rocket: Long March-4 (...??)
Payload: Yaogan-30-01-02 satellite
Orbit: Sun-synchronous orbit (SSO)
Launch site: Jiuquan Satellite Launch Center (Gobi Desert)
Time: December 27, 23:40 (Beijing time)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
From Henri Kenhmann at East Pendulum on 2020.12.26:
The 39th Chinese space launch in 2020 will take place on 27 December at the Jiuquan Space Center, after 23:38 Beijing time.
One of the fallout zones is located 50 km off the Myanmar coast.
【发射预报】中国航天2020年最后一次发射任务。
火箭:长征四号丙 遥二十五
载荷:遥感三十一号02组卫星
轨道:SSO
发射场:中国酒泉卫星发射中心
时间:12月27日23:40（北京时间）
[Launch forecast] The last launch mission of China Aerospace in 2020.
Rocket: Long March-4 (...??)
Payload: Yaogan-30-01-02 satellite
Orbit: Sun-synchronous orbit (SSO)
Launch site: Jiuquan Satellite Launch Center (Gobi Desert)
Time: December 27, 23:40 (Beijing time)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
From Henri Kenhmann at East Pendulum on 2020.12.26:
The 39th Chinese space launch in 2020 will take place on 27 December at the Jiuquan Space Center, after 23:38 Beijing time.
One of the fallout zones is located 50 km off the Myanmar coast.
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shanlung
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I was at Jiuquan. Ok the city, in 2013
I wanted to go to the Jiuquan launch site.
My Taiwanese friends I was with vetoed that idea.
They said we all probably be caught and imprisoned as spies.
But then, we had so many other places to go to.
shanlung.livejournal.com
Over the other side, barbarians and demons roam.
On this side, women, wine and song.
At the gate
Look at the thickness of the walls of the fortress there.
You all know Mongols took only a year to smashed and destroy the armies of Europe under Subotei and Batu
And taken Mongols 40 years to win over China.
And only because Mongols used Chinese to fight Chinese
And the thickness of the walls Mongols had to go through.
I wanted to go to the Jiuquan launch site.
My Taiwanese friends I was with vetoed that idea.
They said we all probably be caught and imprisoned as spies.
But then, we had so many other places to go to.
Running about QingHai Plateau Part 2 of 2
Continued from Running about QingHai Plateau Part 1 of 2 http://shanlung.livejournal.com/142996.html Thursday 22 Aug 2013 More photos in Flickr collection "Running about QingHai Plateau" http://www.flickr.com/photos/shanlung/sets/72157635405840564/ We had another good local breakfast. We all love…
shanlung.livejournal.com
Over the other side, barbarians and demons roam.
On this side, women, wine and song.
At the gate
Look at the thickness of the walls of the fortress there.
You all know Mongols took only a year to smashed and destroy the armies of Europe under Subotei and Batu
And taken Mongols 40 years to win over China.
And only because Mongols used Chinese to fight Chinese
And the thickness of the walls Mongols had to go through.
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