I have (yet another) dumb question: Why hasn’t any American company reverse engineered the Russian design, and marketed it’s own clone version of this engine? Any “improvement” in the design, even if minor, would make complicate a patent challenge.
If an American company “cloned” an engine, it would be built in China like the next version of Boeing airliners.
Why don’t we use the reliable engine designs we had from the 60’s-70’s 80’s?
Are we that devoid of the capability of industrial out put we can’t build a rocket engine?