The H3 is a Japanese medium-lift launch vehicle developed by JAXA and Mitsubishi Heavy Industries, a hydrolox-fuelled rocket that succeeds the H-IIA and H-IIB. It uses the LE-9 main engine, designed to be cheaper to produce as part of an effort to lower launch costs, and has a modular design with two or three LE-9 engines in the first stage and zero, two or four SRB-3 solid boosters. Its second stage uses the LE-5B-3 engine. Development began in 2013, with Mitsubishi Heavy Industries as prime contractor. The maiden flight in March 2023 failed when the second-stage engine did not ignite, and the first successful flight came in February 2024. It also launches the HTV-X cargo spacecraft to the International Space Station.
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developed by JAXA and Mitsubishi Heavy Industries (MHI)
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is a Japanese medium-lift launch vehicle developed by JAXA and Mitsubishi Heavy Industries (MHI)
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1. H3 (Wikipedia)
Lead, maiden flight
Its maiden flight in March 2023 failed after the second-stage engine did not ignite.
Lead, use
the H3 is used to launch the HTV-X cargo spacecraft to the International Space Station
Lead, engines
The H3 uses the LE-9 main engine
Lead, engines, propulsion
A hydrolox-fuelled rocket
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developed by JAXA and Mitsubishi Heavy Industries (MHI)
Lead, country of origin
is a Japanese medium-lift launch vehicle developed by JAXA and Mitsubishi Heavy Industries (MHI)
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