Another installment of 'Things Kerbal Space Program Doesn't Teach' - explaining the expander cycle rocket engines in more detail. Expander cycles use the waste heat from the combustion chamber and nozzles to boil liquid hydrogen and power the turbines. The main advantages are cooler, less chemically active turbine environments, but if used in a closed cycle design the total thrust is limited.

Most of this material is at a pretty high level, I'm not a rocket scientist, I only play one on the internet.

Most of the flow schematics are taken from this excellent article by William Green
https://blogs.nasa.gov/J2X/2014/03/24...

I also took some o
https://ntrs.nasa.gov/archive/nasa/ca...

Also, Emre Kelly's story on the Dragon capsule RUD
https://www.floridatoday.com/story/te...

John Kraus's Delta IV photo is available from his site:
https://www.johnkrausphotos.com/