Originally Posted by Arm out the window
When cool, it should read ambient temperature (eg 30 or so).
In flight with max continuous power set, about 650 - 690 deg - lower power settings, lower TOT.
On shutdown, down to about 250, then creeping back up to about 350 or so as the cooling airflow goes away.
After 30 minutes shut down, would be back to under 150 easily.
Ok, further research (according to Bell) has indicated that during the 1-minute warm-up (cold start), the B206 TOT should "stabalize" at
520°C, for the warm up at 60%-62% Ng.
Given that, seems that during the 2-minute cool down on landing that it would cool at most to 520°C. So, I'm guessing the 250°C figure you give above is after fuel shutoff, while the turbine is spinning down and still providing some air, but without the heat of combustion. As that dies, then it goes back up. Perhaps at idle during the 2-minute cool down it is a bit hotter. If anyone can observe for me the temp at the start and end of a typical cool-down, would be appreciated.
Also, once the 1-minute warm-up is complete and Ng is raised to 70%, to power up the Generator, what does TOT go to then?