USAF To Keep AR-1 Work Going Amid BE-4 Setback

Credit: Aerojet Rocketdyne
The U.S. Air Force says it will continue investing in the Aerojet Rocketdyne AR-1 engine as a potential replacement for the Russian-made RD-180 as the Blue Origin BE-4 experiences setbacks during developmental testing. The decision comes at a critical juncture, with the service shifting gears from...

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