This document discusses supersonic combustion, including its objectives, working, usage, advantages, and disadvantages. Supersonic combustion occurs when combustion zone velocity exceeds the speed of sound in unburned gas. It is used in scramjets, where fuel injected into supersonic air mixes, ignites, and burns within milliseconds, ejecting high-enthalpy gases through a nozzle to produce thrust. Advantages include not needing to carry oxygen and having higher specific impulse than rockets. Disadvantages include being limited to hypersonic velocities, requiring expensive testing, and lacking stealth technology.