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#20 by edkyle99 on 23 Sep, 2023 13:22
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The video shows a break in the exhaust, then the exhaust goes orange, but then changes to white before petering out.
There's a brief orange flash at the first break, then thrust seems to continue until the orange outburst. Then thrust ends and fragments appear. I suppose this is a propulsion failure, but could alternative explanations involve an RCS failure, or even a fairing fail?
- Ed Kyle -
#21 by Craigles on 25 Sep, 2023 15:28
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Where did the pieces fall? In particular, what was the disposition of the 4th stage or any other hydrazine / toxic components? Is
LandspaceGalactic Energy using a known 4th stage for Ceres-1? -
#22 by edkyle99 on 26 Sep, 2023 22:10
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Where did the pieces fall? In particular, what was the disposition of the 4th stage or any other hydrazine / toxic components? Is
All I have for the fourth stage is that it is a pressure fed liquid fueled stage with a main engine that works at 310 sec ISP, augmented or supported by smaller thrusters. One site suggests thrusters of 25N, 200N, and 2000N. Presumably hypergolic bipropellant.LandspaceGalactic Energy using a known 4th stage for Ceres-1?
- Ed Kyle -
#23 by Galactic Penguin SST on 24 Oct, 2023 03:22
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Galactic Energy has concluded the failure investigations pretty quickly.
* Liftoff was at 04:59:10 UTC
* Failure occurred at T+67.5 s when LV lost attitude control
* Control failure was blamed at abnormal burn-through in the 1st stage motor nozzle expansion section.
* Further investigation points to origin the the burn-through being improper drilling of screw holes in the nozzle expansion during manufacturing, causing flaws in the inner carbon fiber layers.
* Manufacturing procedures, requirements, operational training and QC will be improved.
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#24 by catdlr on 24 Oct, 2023 03:25
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Google Translated:Quote
Ceres-1 (Yao-11) launch vehicle flight failure passed zero review
Chenghe Power Aerospace Galaxy Power Aerospace 2023-10-24 10:41 Originated in Beijing
On October 23, 2023, Galaxy Power Aerospace Company organized and held a review meeting to zero out flight faults of the Ceres-1 (Yao-11) launch vehicle. After deliberation, the review team unanimously believed that: the problem has been accurately positioned, the mechanism is clear, the problem has been reproduced, the measures taken have been verified to be effective, and inferences have been made, it can be returned to zero.
On September 21, 2023, the Ceres-1 (Bi-11) carrier rocket carried out a commercial launch mission at the Jiuquan Satellite Launch Center. The rocket ignited and took off at 12:59:10. After about 67.50 seconds of flight, the rocket's attitude became unstable and the launch mission failed. After the mission failed, the company quickly established a zeroing working group to conduct in-depth analysis of the reasons for the failure and locate the fault. Through a large amount of work such as production process review, fault tree sorting, bottom event analysis, problem location and mechanism analysis, the cause of the fault was identified. and failure mechanism, and reproduced the problem through experiments.
The flight failure problem of the Ceres-1 (Yao-11) launch vehicle was located in the abnormal ablation of the expansion section of the first-stage engine nozzle. During the processing of the screw holes of the nozzle expansion section assembly, improper operation caused internal defects in the carbon cloth layer, resulting in abnormal ablation of the expansion section, which in turn led to an unstable first-level flight attitude. In response to the problem location, the company guided supporting production units to adopt a number of improvement measures such as improving process operating procedures, refining operating requirements, strengthening operating procedure training, and optimizing production process inspections to further enhance the quality control of the production process.
Aerospace is a high-investment and high-risk undertaking, and any neglect of quality will cause irreparable losses. Galaxy Power Aerospace Company will conscientiously implement improvement measures, steadily and reliably promote the follow-up go-around work, and further optimize the whole-process quality control, strengthen the supervision, feedback and tracking of quality issues in the external production process, and go deep into every production link to strictly control Every detail ensures that subsequent launch missions are flawless.
Grammer CheckedQuoteCeres-1 (Yao-11) launch vehicle flight failure passed zero review
Chenghe Power Aerospace Galaxy Power Aerospace 2023-10-24 10:41 Originated in Beijing
On October 23, 2023, Galaxy Power Aerospace Company organized and held a review meeting to zero out flight faults of the Ceres-1 (Yao-11) launch vehicle. After deliberation, the review team unanimously believed that: the problem had been accurately identified, the mechanism was clear, the problem had been reproduced, the measures taken had been verified to be effective, and inferences had been made that it could be returned to zero.
On September 21, 2023, the Ceres-1 (Bi-11) carrier rocket carried out a commercial launch mission at the Jiuquan Satellite Launch Center. The rocket ignited and took off at 12:59:10. After about 67.50 seconds of flight, the rocket's attitude became unstable and the launch mission failed. After the mission failed, the company quickly established a zeroing working group to conduct in-depth analysis of the reasons for the failure and locate the fault. Through a large amount of work such as production process review, fault tree sorting, bottom event analysis, problem location and mechanism analysis, the cause of the fault was identified and the failure mechanism reproduced. The problem was also located and analyzed through experiments.
The flight failure of the Ceres-1 (Yao-11) launch vehicle was caused by the abnormal ablation of the expansion section of the first-stage engine nozzle. During the processing of the screw holes of the nozzle expansion section assembly, improper operation caused internal defects in the carbon cloth layer, resulting in abnormal ablation of the expansion section, which in turn led to an unstable first-level flight attitude. In response to the problem location, the company guided supporting production units to adopt a number of improvement measures such as improving process operating procedures, refining operating requirements, strengthening operating procedure training, and optimizing production process inspections to further enhance the quality control of the production process.
Aerospace is a high-investment and high-risk undertaking, and any neglect of quality will cause irreparable losses. Galaxy Power Aerospace Company will conscientiously implement improvement measures, steadily and reliably promote the follow-up go-around work, and further optimize the whole-process quality control. We will strengthen the supervision, feedback and tracking of quality issues in the external production process, and go deep into every production link to strictly control every detail. This will ensure that subsequent launch missions are flawless.
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#25 by FutureSpaceTourist on 12 Nov, 2023 06:51
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https://twitter.com/cnspaceflight/status/1723516628321874017Quote
📸 The moment o CERES-1 Y11 explosion, shared by GALACTIC-ENERGY CEO LIU Baiqi