Solid propellant rockets use a mixture of fuel and oxidizer that is preloaded into a solid form. When ignited, the chemical reaction produces hot gases that expand and are expelled through a nozzle, generating thrust. This type of rocket is simpler in design and often more reliable than liquid propellant rockets, as it does not require complex fuel pumps or storage systems. These rockets are commonly used in various applications, including military missiles and space launch vehicles. Notable examples include the Space Shuttle boosters and the Minuteman intercontinental ballistic missile. Their straightforward operation makes them a popular choice for many aerospace missions.