Q920454

A vernier thruster is a rocket engine used on a spacecraft or launch vehicle for fine adjustments to the attitude or velocity. Depending on the design of a craft's maneuvering and stability systems, it may simply be a smaller thruster complementing the main propulsion system, or it may complement larger attitude control thrusters, or may be a part of the reaction control system. The name is derived from vernier calipers which have a primary scale for gross measurements, and a secondary scale for fine measurements.

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Wikimedia, Wikidata
rocket engine, 
11D458, Dong Fang Hong 2, Ekran, LR-101, RD-0237, RD-0245, rocket engine, YF-23, 

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Location: KML, Cluster Map, Maps,

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  11D458 ⓘ
  Isayev N2O4/UDMH rocket engine. 0.392 kN. In Production. Isp=252s. Small attitude control thruster in Briz upper stage

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  LR-101 ⓘ
  vernier thruster developed by Rocketdyne

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  RD-0237 ⓘ
  

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  RD-0245 ⓘ
  vernier engine

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  YF-23 ⓘ
  series of Chinese liquid rocket engines

Frameless

Surveyor-vernier-engine

202991main nightthrusters330W

Vernier Europa

Rocketdyne LR101 vernier motor

Lunar Surveyor Rocket Engine TD-339

Type	Subtype	Date	Description	Notes	Source
class	rocket engine		11D458	vernier thruster	Wikidata
class	rocket engine		LR-101	vernier thruster	Wikidata
class	rocket engine		RD-0237	liquid-propellant rocket, vernier thruster	Wikidata
class	rocket engine		RD-0245	liquid-propellant rocket, vernier thruster	Wikidata
class	rocket engine		YF-23	liquid-propellant rocket, vernier thruster, YF-series rocket engine	Wikidata
commons	image		Surveyor-vernier-engine		Commons
commons	image		202991main nightthrusters330W		Commons
commons	image		Vernier Europa		Commons
commons	image		Rocketdyne LR101 vernier motor		Commons
commons	image		Lunar Surveyor Rocket Engine TD-339		Commons