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A reaction control system (RCS) is a spacecraft system that uses thrusters to provide attitude control and translation. Alternatively, reaction wheels can be used for attitude control. Use of diverted engine thrust to provide stable attitude control of a short-or-vertical takeoff and landing aircraft below conventional winged flight speeds ...
The forward fairing measured 1 foot 11 inches (58 cm) long and housed the reaction control system (RCS) computer, power distribution block, ECS controller, separation controller, and components for the high-gain antenna, and included eight EPS radiators and the umbilical connection arm containing the main electrical and plumbing connections to ...
The EECOM monitored cryogenic levels for fuel cells, and cabin cooling systems; electrical distribution systems; cabin pressure control systems; and vehicle lighting systems. EECOM originally stood for electrical, environmental and communication systems. The Apollo EECOM was responsible for CSM communications through Apollo 10. Afterward the ...
The ascent stage contained the crew cabin, instrument panels, overhead hatch/docking port, forward hatch, optical and electronic guidance systems, reaction control system, radar and communications antennas, ascent rocket engine and propellant to return to lunar orbit and rendezvous with the Apollo Command and Service Modules.
It was constructed in 1964 to support the Apollo program and upgraded in 1985 to support the Space Shuttle program. The hypergolic propellants used in the Space Shuttle's reaction control system , Orbital Maneuvering System , and the auxiliary power units provided hydraulic power to the shuttle's control surfaces , main engines and brakes were ...
The R-4D is a small hypergolic rocket engine, originally designed by Marquardt Corporation for use as a reaction control system thruster on vehicles of the Apollo crewed Moon landing program. Aerojet Rocketdyne manufactures and markets modern versions of the R-4D. [1]
Ullage is often a secondary function of the reaction control system such as on the Apollo Lunar Module (LM). In his book Lost Moon, Jim Lovell recounted a description of a course-correction burn of the LEM's main descent engine to re-enter a free return trajectory to Earth during the successful recovery of the Apollo 13 capsule:
A control moment gyroscope (CMG) is an attitude control device generally used in spacecraft attitude control systems. A CMG consists of a spinning rotor and one or more motorized gimbals that tilt the rotor’s angular momentum .