Related Words

Propellant: The gas used to expel materials from aerosol containers.

Liquid: A state of matter that has a high density and is incompressible compared to a gas. Liquids take the shape of their container but do not expand to fill the container as gases do. Liquids diff . . . View Full Definition

Oxidizer: All things need oxygen to burn. When a pile of wood burns in an open fire, it sucks in oxygen from the surrounding air. When rocket fuel burns, it can't suck in oxygen from the surrounding a . . . View Full Definition

Injector: A system of orifices used to direct propellant to create mixing and fog production for combustion.

Inhibit: Bonding non-propellant material to restrict the burning surface of a propellant grain.

Igniter: An igniter is a small device which is used to ignite the propellant of a rocket motor. It's usually made of nichrome wire tipped with a combustible solid compound. When an electrical current . . . View Full Definition

Plumbing: Refers to tubing and hoses used as conduits for propellants and pressurants in a liquid or hybrid propulsion system.

Sliver: Remnant of propellant or fuel in solid or hybrid motors as a consequence of initial geometry.

Ullage: Unfilled volume of a propellant tank and rarely the unfilled volume in a solid motor.

Unrestricted: Refers to a free-standing grain which burns on all surfaces. This method leaves the chamber wall unprotected by propellant and is therefore seldom used.