JAXA has announced a next phase upgrade to the Epsilon rocket today, known as "Epsilon S". This version would see slight changes to the 1st/3rd stages, avionics, fairings and other parts to maximize commodity with the upcoming H3 rocket.https://www.jaxa.jp/press/2020/06/20200612-1-2_j.html …
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The 1st stage will directly make use of H3's new SRBs (the "SRB-3"), the 3rd stage will be doubled in propellant load mass/enlarged to same diameter as the lower stages/changed to tri-axis RCS control from spin-stabilization, and standardizing sensors etc. with the H3.
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This development will also lead to eventually movement of the organization of launches from JAXA to main contractor IHI Aerospace, in a similar deal of the H-IIA with Mitsubishi Heavy Industries.
07:19 - 12. Juni 2020
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