20 Years of SLS and Constellation – 50 Years of the Same RS25 Engine and Each One Costs $145 Million
by Brian Wang from NextBigFuture.com on (#73AD4)
SLS (Space Launch System) uses a 50 year old rocket engine design that now costs $145 million each (not including labor and testing) which is over 300 times more expensive than the more powerful SpaceX Raptor 3 engine. It is a flying museum piece that is using difficult liquid hydrogen which was the reason for ...