RD180s are fabricated in batches of 4. We currently have several years of inventory in handhttps://twitter.com/Psychonaut421/status/1250608118440046597 …
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Looks like
@Rogozin didn't like your answer about engineshttps://twitter.com/Rogozin/status/1251001033830141963 …
In this case, Rogozin is wrong. He writes in PRESENT time, and the original post was about the PAST (1990s), about the REASONS the Russian engines started ordering. Now CONSEQUENCES: their excellent quality and the adaptation of American rockets for them made them irreplaceable.