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US space projects for years have been dependent on Russian rocket engine technology.
The attempts to copy and reproduce these engines has been a failure so far.
US AF Assistant Secretary Calvelli is alarmed over this.

Pentagon worried by slow pace of ULA’s Vulcan rocket development - The Washington Post
Vulcan Program’s Delay Shows US Can’t Even Copy, Much Less Replace, Russia’s Rocket Engine Know-How (sputnikglobe.com)

 

Sumela » 23 May 2024, 9:18 pm » wrote: ↑

23 May 2024, 9:18 pm

US space projects for years have been dependent on Russian rocket engine technology.
The attempts to copy and reproduce these engines has been a failure so far.
US AF Assistant Secretary Calvelli is alarmed over this.

Pentagon worried by slow pace of ULA’s Vulcan rocket development - The Washington Post
Vulcan Program’s Delay Shows US Can’t Even Copy, Much Less Replace, Russia’s Rocket Engine Know-How (sputnikglobe.com)

https://ourplnt.com/remake-rocketdyne-f ... mans-moon/


Each second, a single Rocketdyne F-1 engine burned 5,683 pounds (2,578 kg) of oxidizer and fuel: 3,945 lb (1,789 kg) of liquid oxygen and 1,738 lb (788 kg) of RP-1, generating 1,500,000 lbf (6.7 MN; 680 tf) of thrust.
The mix of liquid oxygen and kerosene is like "chemical supercharging"
It took 5 of these engines ganged together to form the Saturn V  engine
Why these engines will never be made again

1. The ultra-talented and experienced engineers who built the Rocketdyne F-1 engine were retired or long dead – and some of the crucial knowledge, skills, and experience were long gone with them.
2. Many of those skills and techniques which was used to build F-1 engines are no longer in use. So we simply don’t have the people and skills that can make them in the same way anymore.

GHETTOBLASTER » 23 May 2024, 9:34 pm » wrote: ↑

23 May 2024, 9:34 pm

https://ourplnt.com/remake-rocketdyne-f ... mans-moon/

Each second, a single Rocketdyne F-1 engine burned 5,683 pounds (2,578 kg) of oxidizer and fuel: 3,945 lb (1,789 kg) of liquid oxygen and 1,738 lb (788 kg) of RP-1, generating 1,500,000 lbf (6.7 MN; 680 tf) of thrust.
The mix of liquid oxygen and kerosene is like "chemical supercharging"
It took 5 of these engines ganged together to form the Saturn V  engine
Why these engines will never be made again

1. The ultra-talented and experienced engineers who built the Rocketdyne F-1 engine were retired or long dead – and some of the crucial knowledge, skills, and experience were long gone with them.
2. Many of those skills and techniques which was used to build F-1 engines are no longer in use. So we simply don’t have the people and skills that can make them in the same way anymore.

 
Well done sir.  And then multiply this one anecdotal issue across the entire military systems.  Its systemic. 
Inherent in this is the idea of being "profit driven" versus "purpose driven".  

One of the best books written on this matter is by Andrei Martynov:

Losing Military Supremacy - The Myopia of American Strategic Planning.

 

They have the engines,,,,,and still cannot copy them.

That must really hurt their pride.

Why can't Pratt & Whitney make RD-180 engines on their ...

Space Exploration Stack Exchange
https://space.stackexchange.com › questions › why-cant...

May 31, 2016 — Rocket engines are tricky beasts. The Russians have coatings
and materials that are not available in the United States.