Embarrassing that Boeing uses Russian engine for rocket: Musk
SpaceX CEO Elon Musk in a tweet said, "It's embarrassing that Boeing/Lockheed need to use a Russian engine on Atlas." Lockheed Martin and Boeing have been using the Russian-made engine RD-180, based on an older Soviet model, to power the first stage of their Atlas carrier rockets, for over a decade. However, Musk added the engine design was "brilliant".