Epsilon's Second Launch Results and Development Status for the Future

Paper number

IAC-17,D2,1,6,x37116

Author

Mr. Ryoma Yamashiro, Japan Aerospace Exploration Agency (JAXA), Japan

Coauthor

Prof. Yasuhiro Morita, Japan Aerospace Exploration Agency (JAXA), Japan

Coauthor

Mr. Takayuki Imoto, Japan Aerospace Exploration Agency (JAXA), Japan

Coauthor

Prof. Shinichiro Tokudome, Japan Aerospace Exploration Agency (JAXA)/ISAS, Japan

Year

2017

Abstract

The Epsilon Launch Vehicle, the newest version of Japan’s solid propulsion rocket, has been further developed under the name of “Enhanced Epsilon” since its first flight in 2013. The second Epsilon (Epsilon-2), the first application of Enhanced Epsilon, succeeded in launching the satellite Arase, the Exploration of energization and Radiation in Geospace (ERG), into orbit as planned in December 2016.
 The aims of Enhanced Epsilon's development include the increase of the launch capacity and payload usable volume by enlarging the second stage motor, redesigning the total structure and lightening avionics components. The second flight achieved these aims and confirmed the new design's validity. 
 As for the future plan, the third launch will demonstrate a new PBS (Post Boost Stage) with liquid propulsion system developed for Enhanced Epsilon. The fourth launch is planned to carry multiple payloads on a new PAF (Payload Attach Fitting), which development has just started. Meanwhile, aiming at synergy effect, we have been developing parts and components to be shared with the H3 Launch Vehicle, Japanese large-size next-generation launch vehicle. Looking further ahead, we are planning to start the concept study for the future Epsilon.
 This paper describes Epsilon-2 launch results, Enhanced Epsilon’s development status, and its future plans.

Abstract document

IAC-17,D2,1,6,x37116.brief.pdf

Manuscript document

IAC-17,D2,1,6,x37116.pdf (🔒 authorized access only).

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