> (like i do when i finally get a real garage :) Cool :) > Additional facet is that Raptor turbopump is full flow and thus runs at very low You write it furt

> (like i do when i finally get a real garage :) Cool :) > Additional facet is that Raptor turbopump is full flow and thus runs at very low You write it further yourself, but rocket turbopump turbines aren't running with cold gas - the hotter the input gas, the more energy can be provided to pumps, so turbine blades have roughly the same requirements as those in F-16. The design on those blades is pretty complex, with materials, processes and substructures like internal cooling channels - all to reach possibly higher temperature to work with.