Ну да
Blue Origin свой двигатель всего-то с 2011 делает
А SpaceX, если не ошибаюсь, с 2016
да да да. October 2013 was the first time SpaceX disclosed a nominal design thrust of the Raptor engine—2,900 kN (661,000 lbf)[17]—although early in 2014 they announced a Raptor engine with greater thrust, and in 2015, one with lower thrust that might better optimize thrust-to-weight