Hypergolic rocket engine

A hypergolic rocket engine uses propellants that ignite spontaneously upon contact without needing an external ignition source. Typically, it combines a fuel and an oxidizer stored separately; when they meet in the engine, they ignite instantly. This feature allows for reliable and quick engine start-up, making hypergolic engines ideal for spacecraft maneuvers, orbital adjustments, and deep-space missions. While they are convenient and dependable, hypergolic propellants are usually toxic and require careful handling due to their hazardous nature. Overall, they offer a balance of simplicity, reliability, and rapid ignition critical for specific aerospace applications.