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- R-4D abstract "A R-4D thruster is a small hypergolic rocket engine designed by Kasier Marquardt originally for the Apollo moon program.Developed as attitude control thruster for the Apollo Service and Lunar Modules in 1960s. Each unit for the modules employed four quadruple clusters (pods). It was first flown on Apollo 201 in February 1966. Approximately 800 were produced during the Apollo program.Sixteen engines just like this were mounted on the exterior of each lunar module in four quadruple clusters and sixteen on each service module. Because both the lunar module and service module were jettisoned during the Apollo missions, no flown examples exist.The thruster is currently employed in the R-4D-10 version of the U.S. Navy's Leasat, R-4D-11 by Insat 1 and Arabasat 1, R-4D-12 by HS-393, Milstar, Intelsat 6, Italsat, and Olympus and Eurostar. Burn Time can be up to 1 hour continuous with a 2.67 Ns min impulse.It has been used on a number of later space craft, including Japan's H-II Transfer Vehicle that travels to ISS. Its overall performance is comparable to the SpaceX Draco thruster used on Falcon 9 that provides spacecraft attitude control .".
- R-4D wikiPageID "42622453".
- R-4D wikiPageRevisionID "606407120".
- R-4D chamberPressure "6.84".
- R-4D countryOfOrigin United_States.
- R-4D cycle "pressure-fed".
- R-4D fuel Monomethylhydrazine.
- R-4D manufacturer Marquardt_Corporation.
- R-4D name "R-4D".
- R-4D oxidiser Dinitrogen_tetroxide.
- R-4D purpose Reaction_control_system.
- R-4D specificImpulseSeaLevel "312.0".
- R-4D thrust(vac)_ "440.0".
- R-4D thrustToWeight "13.74".
- R-4D type "liquid".
- R-4D usedIn Apollo_(spacecraft).
- R-4D usedIn H-II_Transfer_Vehicle.
- R-4D usedIn Orion_(spacecraft).
- R-4D usedIn Space_Shuttle.
- R-4D subject Category:Rocket_engines.
- R-4D subject Category:Aerojet_engines.
- R-4D comment "A R-4D thruster is a small hypergolic rocket engine designed by Kasier Marquardt originally for the Apollo moon program.Developed as attitude control thruster for the Apollo Service and Lunar Modules in 1960s. Each unit for the modules employed four quadruple clusters (pods). It was first flown on Apollo 201 in February 1966.".
- R-4D label "R-4D".
- R-4D label "R-4D".
- R-4D sameAs R-4D.
- R-4D sameAs R-4D.
- R-4D sameAs m.010gr_7p.
- R-4D sameAs Q11240350.
- R-4D sameAs Q11240350.
- R-4D wasDerivedFrom R-4D?oldid=606407120.
- R-4D isPrimaryTopicOf R-4D.