[ Rocket Engines ]

The LE-5B rocket engine, developed for the second stage of the H-II rocket, is the improved model of LE-5A engine. It is the first rocket engine in the world which uses the hydrogen used for the cooling of the thrust chamber as the turbine gas.

Main specifications

Propellant Liquid oxygen/liquid hydrogen
Thrust (vacuum) 14 ton
Isp (vacuum) 449sec
Weight 285kg
Length 2,765mm

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