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The H3 upper stage uses an engine designated LE-5B-3 developed by Mitsubishi Heavy Industries.
The H3 upper stage uses an engine designated LE-5B-3 developed by Mitsubishi Heavy Industries and similar to the LE-5B engine used on the H-2A rocket.
JAXA began developing the H3 rocket in partnership with Mitsubishi Heavy Industries in 2014.
H3 was co-developed by JAXA and Mitsubishi Heavy Industries at a cost of 200,000,000,000 JPY (about $1,500,000,000).
The troubled H3 second stage was powered by a single LE-5B-3 hydrogen-fueled engine developed by Mitsubishi Heavy Industries (MHI).
Inmarsat-6 F1 is due to start operations from a geostationary slot over the Indian Ocean early 2023 after its 2021-12-01 launch by Mitsubishi Heavy Industries.
JAXA began developing the H3 rocket in partnership with Mitsubishi Heavy Industries (MHI) in 2014.
Inmarsat-6 F2 is identical to the Airbus-built Inmarsat-6 F1 satellite that Mitsubishi Heavy Industries launched in late 2021 toward a geostationary orbit above the Indian Ocean.
Mitsubishi Heavy Industries Ltd operates the H2A rocket that lifted off from the Tanegashima Space Center.
Mitsubishi Heavy Industries launched the first I-6 satellite in December 2021 and the all-electric spacecraft is due to reach its orbital position later in 2022.
Mitsubishi Heavy Industries, the prime contractor for Japan’s next-generation H3 launch vehicle, partnered with Inmarsat to develop InRange.
Inmarsat I-6 F1 was launched by Mitsubishi Heavy Industries (MHI) in Japan in December 2021.
Mitsubishi Heavy Industries plans to cooperate with JAXA and other aerospace companies in Japan on activities related to Orbital Reef, leveraging relationships built through participation in the ISS program.
Mitsubishi Heavy Industries manufactured the Kibo laboratory module that was installed on the International Space Station in 2008.
Mitsubishi Heavy Industries built the HTV cargo spacecraft and the H-2 launch vehicle that launched those spacecraft to the International Space Station.
Sierra Space and Mitsubishi Heavy Industries signed a memorandum of understanding on 2022-03-17 to study collaboration on technologies to support the Orbital Reef commercial space station.
Mitsubishi Heavy Industries launched the first Inmarsat-6 satellite, I-6 F1, in December 2021.
JAXA and MHI focused on the LE-9 combustion chamber problem while developing new turbopump hardware.
JAXA and MHI plan to use a 3D-printed combustion chamber for the H3 second test flight carrying ALOS-4.
MHI shipped the H3 Flight Test-1 core stage to Tanegashima Space Center in January 2021.