The LE-7A from Mitsubishi Heavy Industries is a high-performance liquid rocket engine developed for the first stage of Japan’s H-IIA and H-IIB launch vehicles. Designed for reliable and efficient propulsion, it utilizes liquid oxygen (LOX) and liquid hydrogen (LH2) propellants to deliver high thrust and performance for orbital launch missions. This engine generates a vacuum thrust of approximately 112 tons and achieves a high specific impulse of 440 seconds, enabling efficient propellant utilization and enhanced payload capability. 

The cryogenic propulsion system is optimized for stable combustion and high efficiency, supporting demanding launch profiles and mission requirements. The LE-7A is engineered with advanced materials and structural design to withstand extreme thermal and mechanical loads during launch operations. The configuration supports long-duration burns and high-performance ascent phases for heavy-lift launch vehicles.

With a mass of approximately 1780 kg and an overall length of 3670 mm, the engine is integrated into large launch systems while maintaining structural robustness and reliability. Powerful and flight-proven, the LE-7A rocket engine is ideal for orbital launch vehicles, heavy payload missions and space exploration programs requiring high-efficiency cryogenic propulsion systems.