Jet engines are miracles.
The more I learn about them, the more amazed I continue to be by them.
I've heard a number of times that the hot gasses passing by the turbine blades is hotter than the melting temperature of those blades.
It simple enough to say that the blades have ceramic coatings (thermal barrier coatings) on those blades and internal cooling channels that together keep the blades cool enough not to melt (or to creep too much outward toward the turbine's housing) at that phenomenal high temperatures.
...and then we get the bubble raft demonstration - which is just my absolute favorite.
And I just found out that the older video I had posted explaining the pigtail's function in creating single crystal turbine blades has disappeared from YouTube. I'm suddenly very sad about that.
