Remember the Saturn V rocket?
Some engineers found out they could learn a lot from the engines. Like, since they didn't have a lot of the manufacturing tech we do now,
"Oh, the welds!" interrupted Case. "The welds on this engine are just a work of art, and everything
on here was welded." The admiration in his voice was obvious. "Today,
we look at ways of reducing that, but that was something I picked up on
from this engine: just how many welds there were, and how great they looked."
And read this, and think about it:
As with everything else about the F-1, even the gas generator boasts
impressive specs. It churns out about 31,000 pounds of thrust (138
kilonewtons), more than an F-16 fighter's engine
running at full afterburner, and it was used to drive a turbine that
produced 55,000 shaft horsepower. (That's 55,000 horsepower just to run the F-1's fuel and oxidizer pumps—the
F-1 itself produced the equivalent of something like 32 million
horsepower, though accurately measuring a rocket's thrust at that scale