What two propellants are utilized by the two reusable BE-3U engines on New Glenn's upper stage?
Answer
Liquid hydrogen and liquid oxygen
The upper stage of the New Glenn rocket, which is designated as expendable, relies on two reusable BE-3U engines for propulsion. These engines operate using a cryogenic propellant combination of liquid hydrogen and liquid oxygen. This choice of propellant in the upper stage is associated with the requirement for extreme cryogenic cooling, necessitating specialized ground handling, yet it contributes to the high-performance delivery capability needed to push payloads into difficult-to-reach orbits.
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