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The competition heats up: In recent static fire tests of its new AR-1 rocket engine Aerojet Rocketdyne set a record for the highest chamber pressure for any American engine using oxygen and kerosene.
They hope to convince ULA to use this engine in its Atlas 5 rocket to replace the Russian engine they presently use. At the moment, though ULA has made no commitment, it appears however that the company is favoring Blue Origin’s engine instead. That Congress favors Aerojet Rocketdyne is their one ace in the hole, since Congress controls the purse strings.