China's Space Program Thread II

tacoburger

Junior Member
Registered Member
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Oh man I love the absolute seethe in the comments whenever there's an update on China's reusable rocket program. I wonder if those retards realize that whenever they call out the chinese for being uncreative subhumans for only copying or when they're throwing shade at China's political/governmental system for suppressing innovation or whatever, do they ever stop to consider that they're basically also throwing literally every other country on earth under the same bus?

If China bad then what are they're going to say for Europe or Russia or Japan or India that are also busy working on their own Falcon 9/Starship copy, but are only on a powerpoint and will be two decades late instead of having actual hardware to test today. Or the half a dozen or so American newspace rocket companies that are also more or less copying SpaceX by the book. Surely all of them will be a dozen times worse right? By nah, complete radio silence from the same group of people once ESA, ISRO or Jaxa or ULA rolls out their totally not Faclon 9 clone by 2035.

Some of them probably aren't American and don't realise the irony of shitting on China while every other space agency is busy drooling their way into irreverencey. If it was their own country making a hard pivot into reusable rockets, they would be praising it to hell and back. At least China has the excuse of having low GDP per captia and being fairly undeveloped compared to the like of Europe and Japan, especially 10 years ago. If anything China changing course so fast and on a country wide scale is unprecedented, it's basically a country sized SpaceX. Even NASA is stuck with the SLS for the next decade and American oldspace simply can't keep up with SpaceX or China.

Best part is all the comments about "commies" or how their private space companies are fake and just shells for the centeral government and thus won't succeed because they aren't truly private, as if ULA/Boeing/Northrop Grumman wasn't absolutely stagnating the American space industry for the last 30 years, or how there's basically no activity in the European/Japanese/Indian private space industry and probably won't be for another decade while Chinese private space companies have already launched a dozen times, while Blue Origin continues to not launch anything into orbit.

It doesn't make any sense anyway, the Raptor is such a rapidly evolving engine that unless China can see the future, there's no way to copy/steal the Raptor, anyone with more then room temperature IQ can see this within 5 seconds.
 

by78

General
The private launch company
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has successfully completed the first round of reliability assessments of its 70-ton reusable LY-70 LOX/Methane engine. The engine has accumulated more than 116 minutes of hot test runs (with single longest test run having exceeded 61 minutes) and demonstrated variable thrust range of 32% to 106% (215kN to 720kN).

Some design specifications of LY-70 are as follows:
- Ground thrust: 686.5kN
- Vacuum thrust: 770.2kN
- Ground specific impulse: 291.2s
- Vacuum specific impulse: 350s
- Engine mass: no greater than 880kg
- Maximum swing angle: ±8°
- Adjustable thrust range: 30% to 110%
- Single-mission engine restarts: ≥3 times
- Reusability: ≥30 times

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Testing on Jiuzhou's LY-70 70-ton reusable LOX/Methane engine continues, which has accumulated more 10,000 seconds of hot test runs, with some 120 engine restarts. One test engine has accumulated more than 3,700 seconds, with 30 restarts.

Updated engine specs are as follows:
– Ground thrust: 676kN
– Vacuum thrust: 704kN
– Ground specific impulse: 290s
– Vacuum specific impulse: 350s
– Engine weight: ≯850kg
– Max swing angle: ±8°
– Adjustable thrust range: 32%-106%
– Single-mission restarts: ≥3 times
– Burn time (single run): ≥200s
– Reusability: ≥50 times

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by78

General
An academic paper on building lunar farms inside lava tubes, similar to earlier concept of situating lunar habitats inside lava tubes.

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An interesting academic paper on setting up a lunar base inside
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, and using karst caves in Chongqing to study the feasibility of this idea. The full paper (in English) is linked below.

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An academic paper on building lunar farms inside lava tubes, which shield plants from space radiation and large temperature swings.

Some proposed technologies and solutions are as follows:
– Light pipes are used to provide sunlight for plants.
– Thermal electric, photovoltaic, and/or helium reactor to satisfy the power requirement of operating various farm equipment.
– Lunar ice to be used as source of water.
– In situ mining and smelting equipment to be used for producing fertilizers.
– Plowing, sowing, drip irrigation, and harvesting to be performed by autonomous systems (i.e. drones) under the control of an intelligent monitoring system.



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taxiya

Brigadier
Registered Member
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Oh man I love the absolute seethe in the comments whenever there's an update on China's reusable rocket program. I wonder if those retards realize that whenever they call out the chinese for being uncreative subhumans for only copying or when they're throwing shade at China's political/governmental system for suppressing innovation or whatever, do they ever stop to consider that they're basically also throwing literally every other country on earth under the same bus?

If China bad then what are they're going to say for Europe or Russia or Japan or India that are also busy working on their own Falcon 9/Starship copy, but are only on a powerpoint and will be two decades late instead of having actual hardware to test today. Or the half a dozen or so American newspace rocket companies that are also more or less copying SpaceX by the book. Surely all of them will be a dozen times worse right? By nah, complete radio silence from the same group of people once ESA, ISRO or Jaxa or ULA rolls out their totally not Faclon 9 clone by 2035.

Some of them probably aren't American and don't realise the irony of shitting on China while every other space agency is busy drooling their way into irreverencey. If it was their own country making a hard pivot into reusable rockets, they would be praising it to hell and back. At least China has the excuse of having low GDP per captia and being fairly undeveloped compared to the like of Europe and Japan, especially 10 years ago. If anything China changing course so fast and on a country wide scale is unprecedented, it's basically a country sized SpaceX. Even NASA is stuck with the SLS for the next decade and American oldspace simply can't keep up with SpaceX or China.

Best part is all the comments about "commies" or how their private space companies are fake and just shells for the centeral government and thus won't succeed because they aren't truly private, as if ULA/Boeing/Northrop Grumman wasn't absolutely stagnating the American space industry for the last 30 years, or how there's basically no activity in the European/Japanese/Indian private space industry and probably won't be for another decade while Chinese private space companies have already launched a dozen times, while Blue Origin continues to not launch anything into orbit.

It doesn't make any sense anyway, the Raptor is such a rapidly evolving engine that unless China can see the future, there's no way to copy/steal the Raptor, anyone with more then room temperature IQ can see this within 5 seconds.
The first full flow stage combustion rocket engine was RD-270 by USSR in 1960s, many decades before Raptor. By the same "logic" US has been copying USSR for decades, private "innovative" SpaceX is copying from "dumb" SOE. The US should have learned from USSR and build their own SOEs, or even better to become a communist country. Almost forgot, US copied their first rocket engine from NAZI Germany, maybe those idiots should argue to become Nazi.
 

gelgoog

Lieutenant General
Registered Member
Staged combustion engines were invented by Isaev in the Soviet Union. And like you said the Soviet Union also invented the first full flow staged combustion engine the RD-270 by Glushko. The RD-270 was supposedly tested and ready for production but the rocket it was designed for, the UR-700, was cancelled.

The US still hasn't managed to make a working oxygen rich staged combustion engine even today. The BE-4 engine by Blue Origin is supposed to be that but they keep exploding engines on the test stand.
 
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