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    • H-IIA Upgrade status and the Next Flagship Launch System of Japan

    Paper number

    IAC-11,D2,1,7,x9800

    Author

    Mr. Shinya Ohkubo, Japan Aerospace Exploration Agency (JAXA), Japan

    Coauthor

    Mr. Wataru Sarae, Japan Aerospace Exploration Agency (JAXA), Japan

    Coauthor

    Mr. Takeshi Fujita, Japan Aerospace Exploration Agency (JAXA), Japan

    Coauthor

    Mr. Hideo Sunakawa, Japan Aerospace Exploration Agency (JAXA), Japan

    Coauthor

    Mr. Yasuhiro Saito, Japan Aerospace Exploration Agency (JAXA), Japan

    Coauthor

    Mr. Koichi Okita, Japan Aerospace Exploration Agency (JAXA), Japan

    Coauthor

    Mr. Takashi Nakamura, Mitsubishi Heavy Industries, Ltd., Japan

    Coauthor

    Mr. Yoshichika Tanabe, Mitsubishi Heavy Industries, Ltd., Japan

    Coauthor

    Mr. Takanobu Kamiya, Mitsubishi Heavy Industries, Ltd., Japan

    Year

    2011

    Abstract
    The result of the conceptual study of Japanese next primary launch system, H-III, along with the development status of H-IIA upgrade will be presented.

The upper stage upgrade of H-IIA launch vehicle is now in development phase and the preliminary design review (PDR) has been conducted. Using the upgraded H-IIA, MHI will be able to offer a longer coast time option in the H-IIA launch service to decrease the delta-v of payload to Geostationary Transfer Orbit (GTO) in 2013. Multi payload launch to different altitude of Sun Synchronous Orbit (SSO) will also be available in mid-2010s using the deep throttling capability of our upper engine, LE-5B.

The next primary launch system, H-III, is now in conceptual study phase and the vehicle configuration study is now on going. Feasibility tests of key technologies are prepared to be finished before transition to the development phase. A fully liquid propellant vehicle is selected as a baseline configuration with various options still in sight. H-III is targeting to be operational in 2020s. Human transportation using advanced version of H-III is considered as a future plan and the preliminary study of human rating is under way.
    Abstract document

    IAC-11,D2,1,7,x9800.brief.pdf

    Manuscript document

    IAC-11,D2,1,7,x9800.pdf (🔒 authorized access only).

    To get the manuscript, please contact IAF Secretariat.