Dictionary Meaning and Definition on 'Propellant'
adj : tending to or capable of propelling; "propellant fuel for
submarines"; "the faster a jet plane goes the greater
its propulsive efficiency"; "universities...the seats
of propulsive thought" [syn: propellent, propelling,
n : something that propels [syn: propellent]
Wikipedia Meaning and Definition on 'Propellant'
A propellant is a material that is used to move ("propel") an object. The material is usually expelled by gas pressure through a nozzle. The pressure may be from a compressed gas, or a gas produced by a chemical reaction. The exhaust material may be a gas, liquid, plasma, or, before the chemical reaction, a solid, liquid or gelled.
Common chemical propellants consist of a fuel; like gasoline, jet fuel, rocket fuel, and an oxidizer.
In aerosol spray cans, the propellant is simply a pressurized gas in equilibrium with its liquid (at its saturated vapour pressure). As some gas escapes to expel the payload, more liquid evaporates, maintaining an even pressure. (See aerosol spray propellant for more information.)
Technically, the word propellant is the general name for chemicals used to create thrust. For vehicles, the term propellant refers only to chemicals that are stored within the vehicle prior to use, and excludes atmospheric gas or other material that may be collected in operation.[See more about Propellant at Dictionary 3.0 Encyclopedia]
Words and phrases related to 'Propellant'
Propellant Sample Sentences in News
- Refueling the Future: New Tech to Keep Satellites Gassed Up in Space
Robotically refueling and maintaining satellites in Earth orbit will allow government agencies and private companies to dramatically extend the lifetime of these valuable communications and scientific assets, advocates say. When a satellite launches into geosynchronous Earth orbit these days, propellant makes up about half its mass. It's just there to enable i Read more on this news related to 'Propellant'
- How Gas Stations in Space Could Fuel Solar System Exploration
Engineers at the Massachusetts Institute of Technology (MIT) in Boston are suggesting establishing off-Earth propellant depots to fuel future missions to the moon. Thelatest suggestion, however, is more cost-efficient, claims the team led by Jeffrey Hoffman, a professor in MIT’s Department of Aeronautics and Astronautics. Writing in the journal Acta Astronauti Read more on this news related to 'Propellant'
- Senate gives final passage to new explosives rules
BATON ROUGE, La. (AP) — Regulations will be tightened on explosives licenses in Louisiana, in response to the discovery of millions of pounds of improperly stored military propellant at Camp Minden. Read more on this news related to 'Propellant'