Jaba
Your position has been that EGT is driving valve temperature, and that seems to be based on CORRELATION not CAUSATION.
Nope. I have never taken that position. I have been very careful to never say that EGT drives valve temperature. I have pointed out that there is a correlation, between EGT and valve temp, and that CHT also correlates.
I have said that exhaust gas heats the valve. Obviously combustion heats the valve too. The two are not mutually exclusive. Walter Atkinson's position was:
Walter Atkinson claims, quote:
EGT does NOT affect valve temperature....
those who think that valve temp is in any way related to EGT must reconcile the fact [blah blah]...This is definitive evidence that the two are NOT related....valve temperature does NOT track EGT. This is 1943 data, not ours. Lycoming verified it in 1966.
NACA:
