Den åttonde uppskjutningen av 'flaggskeppet' H3 lyckades inte komma ut i rymden med sin nyttolast (2025-12-22)
Möjlig orsak: "payload fairing" studsade hårt mot andrasteget som då tappade bränsletryck
Ett tidigare 'fail' (2023-03-07):
(FB) Japansk raketmotor exploderade på marken (Epsilon S) (2024-11-26)
Samt var det väl i somras (2025) som en planerad expedition till månen inte lyckades landa helskinnad.
Citat:
https://global.jaxa.jp/press/2025/12/20251222-2_e.html
Japan Aerospace Exploration Agency (JAXA) launched the MICHIBIKI No. 5, Quasi-Zenith Satellite System (QZS-5) aboard the 8th H3 Launch Vehicle (H3 F8) at 10:51:30 on December 22, 2025 (JST, the time is the 24-hour clock) from Tanegashima Space Center. However, the second stage engine’s second ignition failed to start normally and shut down prematurely. As a result, QZS-5 could not be put into the planned orbit, and the launch failed.
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We have set up a special task force headed by President YAMAKAWA, and started investigations to find out the cause.
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We have set up a special task force headed by President YAMAKAWA, and started investigations to find out the cause.
Möjlig orsak: "payload fairing" studsade hårt mot andrasteget som då tappade bränsletryck
Citat:
https://www.asahi.com/ajw/articles/16245690?msockid=02a44c4548f06848345d5a8b49a569c1
A satellite's protective cover may have doomed Japan's latest H3 rocket mission, with the space agency now investigating if the shield separated abnormally and crippled the vehicle in flight.
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According to JAXA, pressure in the second-stage engine’s hydrogen tank began to drop during the first burn, causing thrust to fall by about 20 percent below expectations.
The agency noted the pressure drop began precisely at the moment the payload fairing separated.
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Data showed a "larger-than-usual impact" during the separation event, leading JAXA to suspect the fairing may have struck the rocket's body as it detached.
The agency added that it has not yet confirmed if the second-stage engine and the Michibiki No. 5 satellite ever separated, nor has it determined their current status.
...
According to JAXA, pressure in the second-stage engine’s hydrogen tank began to drop during the first burn, causing thrust to fall by about 20 percent below expectations.
The agency noted the pressure drop began precisely at the moment the payload fairing separated.
...
Data showed a "larger-than-usual impact" during the separation event, leading JAXA to suspect the fairing may have struck the rocket's body as it detached.
The agency added that it has not yet confirmed if the second-stage engine and the Michibiki No. 5 satellite ever separated, nor has it determined their current status.
Ett tidigare 'fail' (2023-03-07):
Citat:
https://www.asahi.com/ajw/articles/14855589
JAXA’s H-3 rocket launch fails again, key satellite lost
(FB) Japansk raketmotor exploderade på marken (Epsilon S) (2024-11-26)
Samt var det väl i somras (2025) som en planerad expedition till månen inte lyckades landa helskinnad.
