cold gas thruster

A cold gas thruster is a type of rocket engine which uses the expansion of a pressurized gas to generate thrust. As opposed to traditional rocket engines, a cold gas thruster does not house any combustion and therefore has lower thrust and efficiency compared to conventional monopropellant and bipropellant rocket engines. Cold gas thrusters have been referred to as the "simplest manifestation of a rocket engine" because their design consists only of a fuel tank, a regulating valve, a propelling nozzle, and the little required plumbing. They are the cheapest, simplest, and most reliable propulsion systems available for orbital maintenance, maneuvering and attitude control.

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cold gas propulsion system
rocket engine, 
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Frameless

PSAS Cold Gas Thruster Cross Section (22766893915)

PSAS Cold Gas Thruster Cross Section (22766893915) (cropped)

PSAS Prototype Cold Gas Thruster RCS Module (22144162484)

THAICOM 8 first-stage landing (26812794034)

THAICOM 8 first-stage landing (26812794034) (cropped to cold gas thruster section)

Falcon 9 first stage lands on LZ-1 (32153433074) (cropped to cold gas thruster section)

Type	Subtype	Date	Description	Notes	Source
commons	image		PSAS Cold Gas Thruster Cross Section (22766893915)		Commons
commons	image		PSAS Cold Gas Thruster Cross Section (22766893915) (cropped)		Commons
commons	image		PSAS Prototype Cold Gas Thruster RCS Module (22144162484)		Commons
commons	image		THAICOM 8 first-stage landing (26812794034)		Commons
commons	image		THAICOM 8 first-stage landing (26812794034) (cropped to cold gas thruster section)		Commons
commons	image		Falcon 9 first stage lands on LZ-1 (32153433074) (cropped to cold gas thruster section)		Commons