Race To Replace RD-180 At Critical Juncture

Credit: Aerojet Rocketdyne
The rocket engine battle between the 500,000-lb.-thrust class Aerojet Rocketdyne AR1 and Blue Origin BE-4 is heating up, with the AR1 moving through a critical design review and the BE-4 due to conduct a full-scale hot-fire test. The kerosene AR1 and liquefied natural gas BE-4 are being pursued as...

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