Hybrid rocket engines

Hybrid rocket engines combine two types of propellants: a solid fuel and a liquid or gaseous oxidizer. The solid fuel ignites and burns, while the oxidizer is injected into the combustion chamber to sustain the burning process. This design offers the simplicity of solid rockets and the controllability of liquid engines, allowing for adjustable thrust. Hybrid engines are typically safer than purely liquid rockets and can be shut down more easily. This technology is used in various aerospace applications, including launching satellites and experimental vehicles.