MB-XX
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MB-XX
MB-XX is a new family of cryogenic upper stage rocket engines jointly developed by MHI Group and Aerojet Rocketdyne (previously Pratt & Whitney Rocketdyne).
The MB-XX uses liquid oxygen/liquid hydrogen as propellant and is designed as a reliable high-performance, affordable, low-risk upper stage engine family to meet the growing and varied global demands. Development of the MB-XX was started in 1999, component testing was completed in 2004, and system level demonstrator hot-fire testing was completed in September 2005.

Main specifications

Propellant Liquid Oxygen/
Liquid Hydrogen
Thrust (vacuum) 35,000 - 60,000 lbf
Isp (vacuum) 467sec
Weight 760 - 1,300 lb
Length 87 - 130 in
Restarts Multiple

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