> My vague impression, in fact, is that jet turbines are quite a bit more difficult to manufacture than rocket engines, even if the latter are thought of as 'hi

> My vague impression, in fact, is that jet turbines are quite a bit more difficult to manufacture than rocket engines, even if the latter are thought of as 'higher tech'. My impression is that “real” rocket engines include a jet engine just to pump fuel. They have many other pieces as well. Not that a modern high-bypass turbofan is simple, but don’t discount the complexity of rocket science.