[avmich]

> The Saturn V engines were scaled up V2 engines.

That's very debatable :) - everything is everything else, if squinting hard enough. Just an injector head of F-1 was a serious R&D topic, with whole methods of experiments invented.

[WalterBright]

Obviously there was a lot of refinement and development going on in those engines.

For another example, the Ohain axial flow turbojet is quite recognizable even up to modern jet engines. The Whittle radial flow turbojet was a dead end.

Innovations 1..3 are all revolutionary, not evolutionary, advances in rocket engines. 4 maybe is.

https://airandspace.si.edu/collection-objects/v-2-rocket-eng...

The Saturn V engines needed much more powerful turbopumps, and so used a secondary rocket engine just to drive the pump. How cool can you get?