Propellant combination

Propellant combination refers to the specific pairing of fuel and oxidizer used in a rocket engine to produce thrust. The fuel provides the energy, while the oxidizer supplies the oxygen needed for combustion in space, where there is no atmospheric oxygen. Common combinations include liquid fuels like kerosene and liquid oxygen, or hypergolics like hydrazine and nitrogen tetroxide. The choice depends on factors like efficiency, storage, and mission requirements. Proper propellant selection ensures optimal performance, safety, and cost-effectiveness for space missions.