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
- GPIM Spacecraft To Validate Use Of "Green" Propellant
NASA Milestone progress is being made in readying NASA ’s Green Propellant Infusion Mission (GPIM) for launch in 2016, a smallsat designed to test the unique attributes of a high-performance, non-toxic, “green” fuel on orbit. The GPIM marks the first time the United States will use a spacecraft to test green propellant technology, thereby showcasing the inno Read more on this news related to 'Propellant'
- NASA says puzzling new space drive can generate thrust without propellant
A NASA study has recently concluded that the "Cannae Drive," a disruptive new method of space propulsion, can produce small amounts of thrust without the use of propellant, in apparent discordance with Newton's third law. According to its inventor, the device can harness microwave radiation inside a resonator, turning electricity into a net thrust. I Read more on this news related to 'Propellant'
- 'Impossible' space engine may actually work, NASA test suggests
It's really starting to look as if an "impossible" space propulsion technology actually works. Researchers at NASA's Johnson Space Center in Houston have found that a microwave thruster system that requires no propellant does indeed generate a small amount of thrust, Wired UK reported Thursday (July 31). "Test results indicate that the RF [r Read more on this news related to 'Propellant'