- Vernier thruster
A vernier thruster is a
thrusterused on a spacecraftfor attitude control. It is a smaller thrust motor than main attitude control motors and is used for fine adjustments to the attitude or velocity of a spacecraft. A vernier rocket is a smaller rocket engineused for attitude control in conjunction with a larger spacecraft propulsionengine.
Vernier thrusters are used when spacecraft control requirements, such as maneuvering during docking with other spacecraft, dictate a wide range of different thrust levels for attitude or velocity control. Main attitude control thrusters are used for larger movements, verniers for minor adjustments.
As an alternative, larger thrusters which can fire for very short durations or pulses may be fitted instead.
The space shuttle's
reaction control systemhas 6 Vernier engines or thrusters. [ [http://science.ksc.nasa.gov/shuttle/technology/sts-newsref/sts-rcs.html Reaction Control System ] ]
Reaction control system
Wikimedia Foundation. 2010.
Look at other dictionaries:
Vernier — can refer to:*Persons **Pierre Vernier (1580 1637), a French mathematician and instrument inventor.*Places **Vernier, Switzerland, a municipality in the Canton of Geneva, Switzerland.*Things **Vernier scale, the scale used on measuring… … Wikipedia
vernier engine — noun a thruster on a spacecraft … English new terms dictionary
thruster — /ˈθrʌstə/ (say thrustuh) noun 1. someone or something that thrusts. 2. Astronautics a small rocket used to control the attitude of a spacecraft; vernier rocket. 3. a surfboard with three fins, these designed so as to give it a high degree of… … Australian English dictionary
vernier rocket — /ˈvɜniə rɒkət/ (say verneeuh rokuht) noun → thruster (def. 2) … Australian English dictionary
Cold gas thruster — A cold gas thruster is a rocket engine/thruster that uses a (typically inert) gas as the reaction mass. A cold gas thruster usually simply consists of a pressurized tank containing gas, a valve to control its release and a nozzle, and plumbing… … Wikipedia
Attitude dynamics and control — The attitude of a body is its orientation as perceived in a certain frame of reference; providing a vector along which a spacecraft is pointing is a description of its attitude. Dynamics is the term for the modeling of changing conditions, due to … Wikipedia
VF-25 Messiah — The VF 25 Messiah is a fictional space capable variable fighter, seen in the anime Macross Frontier (set in the year 2059) of the Macross series. The craft was developed onboard the space colonization fleet Macross Frontier from the YF 24… … Wikipedia
Rocket engine — RS 68 being tested at NASA s Stennis Space Center. The nearly transparent exhaust is due to this engine s exhaust being mostly superheated steam (water vapor from its propellants, hydrogen and oxygen) … Wikipedia
Reaction control system — A reaction control system, abbreviated RCS, is a subsystem of a spacecraft. Its purpose is attitude control and steering. An RCS system is capable of providing small amounts of thrust in any desired direction or combination of directions. An RCS… … Wikipedia
Early Earth Federation mobile suits in the Gundam universe — Mobile suits (機動兵器) are fictional weapon systems from the Gundam anime metaseries. The following is a list of all early mobile suits from the Earth Federation.MSZ 010 ZZ GundamThe MSZ 010 ΖΖ Gundam is about a fictional weapon from the Universal… … Wikipedia