Ad Astra Rocket Co. is reporting advances in the performance of its 200-kw Vasimr plasma rocket engine prototype and its first demonstration of Constant Power Throttling (CPT), a unique feature of the experimental powerplant. Representatives of the seven-year-old commercial space propulsion company plan presentations on the developments at the 48th annual American Institute of Aeronautics and Astronautics Joint Propulsion Conference in Atlanta on July 30. Ad Astra was founded by former ...


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