Starlink satellites use krypton as propellant. The ars technica article spacex scrubs first attempt to launch 60 internet satellites [updated] (found here) discusses the use of. If the thrusters have a specific impulse of 1500s, that means the krypton atoms are traveling roughly 15 km/s when they exit the.
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I am trying to figure out if xenon or krypton produces more thrust for a given weight flow rate of fuel when the engine operates at the same.