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Replacing the Russian-made rocket engines used by the Atlas 5 and Antares rockets would take about four years, according to Aerojet Rocketdyne.
The company presently refurbishes the Russian engines used by Antares, and is building a host of other engines for other rockets.
In related news, ULA has begun considering shifting some of its military launches from the Atlas 5 to the Delta family of rockets. The company has also released previously undisclosed pricing information for its bulk buy military launches.
Michael Gass, chief executive of Denver-based ULA, said the company’s average per-launch price to the U.S. government is $225 million, a figure that includes the block buy contract as well as pre-existing launch backlog. That figure represents the combined value of the contracts divided by the number of missions.
That $225 million figure, though far less than previously believed, is a little more than twice what SpaceX says it would charge for a comparable launch.