Space launch vehicles are designed to transport payloads ... hydrogen and liquid oxygen (used in the Space Shuttle main engines), or solid propellants (used in some rocket boosters).

The YF-102V, an open-cycle liquid oxygen-kerosene high-altitude engine, is designed for the second stage of cost-efficient, medium-sized launch vehicles. It features multiple restarts and ...

The launch vehicle includes 9 turbopump liquid oxygen/propane-fueled engines powering its main booster, and a singular Aquila multi-ignition engine for orbital insertions and maneuvers once in space.