@Erdayastronaut @SpaceX @Caspar_Stanley @IzanRamos2002 All mass necessitated by an engine design should count as engine mass, eg shrouds, TVC hydraulic power or excess purge gas.
Raptors in production now have electric TVC, saving over a ton of hydraulics mass on booster.
@Erdayastronaut@SpaceX@Caspar_Stanley@IzanRamos2002发动机设计所需的所有质量应计为发动机质量，例如护罩、TVC液压动力或过量净化气体。
生产中的猛禽现在有电动TVC，在助推器上节省了超过一吨的液压质量。