Oil temp threshhold for engine breakage? (Mainly Merlin engines)

[JtD]

Originally Posted by Crumpp

Good, then what the heck is all the other nonsense about it does not apply to certain airplanes under certain conditions!!?

Never said that. Physics always apply. I said:
- basic principles of heat exchangers don't fully explain general aircraft engine oil temperatures
- general aircraft engine oil temperature characteristics don't fully explain Spitfire specific oil temperatures

That means, while it is comparatively easy to estimate the heat exchange in the radiator for a given set of conditions, this is just one piece of the puzzle of oil temperature calculation.