>>63936185Zero, but while I studied engineering at university my best friend ran a turbine test stand and artistically told me everything about the difficulties of jet turbine design.
These are basics which have been known since jet turbines were invented in the 1930's and haven't really changed.
The requirement for turbine blades to remain solid and not turn into a liquid from the heat they're exposed to is kind of obvious, and the efficiency for thermodynamic machines has been known for a long time as well.
The entire industry is chasing higher temperatures like crazy because they unlock literally everything, fuel consumption, power density, lifetime, and you get to choose where to spend it.
If it was possible to push the temp higher on F135 or F119 they would have done it and used it to improve one of those factors.
You cannot push it higher without loosing something, in case of F135 and F119 it's lifetime, with a rapid decline since they're already pushing the boundaries of what the material can do for performance obviously.