Boeing, the prime contractor for the SLS effort, is currently slated to deliver the two initial SLS stages while NASA earmarked funding for the third vehicle ahead of the Artemis moon mission in 2024.
Jim Chilton, former Wash100 Award winner and senior vice president for space and launch at Boeing's defense, space and security segment, told the publication in a prior interview that he expects Boeing to have no problems with producing two SLS vehicles per year.
“We need to look at the price based on a negotiation between NASA and our prime contractor,“ he said. “That negotiation, and how many we buy, ultimately will determine what that final cost will be per rocket.“
In September, NASA completed assembly operations for the SLS core stage's five primary components. The agency, together with Boeing and Aerojet Rocketdyne, finished installing RS-25 engines to the core stage last month.