ITT increasing with altitude?

[jmarkows]

I'm no turboprop expert, but this feels backwards to me. My flight in north America was at normal takeoff power despite being over 90 degrees F.

As I'm climbing, my ITT has been going up with altitude, and I've had to drop back on the throttles to keep ITT under 840. The intakes on the Black Square tablet are showing yellow for the intake air, whereas they were blue on the ground.

I checked and I'm using the Modern flight model and all assistance like auto mixture is off.

I'm at FL320 with a torque of 60, ITT of 830s and N1 of 94.5. OAT is -42C

Thoughts?

[jmarkows]

OK, the torque numbers are actually pretty close to what's in the manual (I suppose that shouldn't come as a surprise), but vI thought ITT went down as you climbed because of the reduction in air density and temperate?

[Black Square]

Indeed, the numbers you see in the manual are where the engines are temperature limited, as opposed to near the ground, where they are torque limited. I make no claims that my turboprop model is perfect, since I am bound to the limitations of MSFS without investing even more work than I already have to overcome it, but the temperature limitations and resulting torques at altitude are accurate.

[jmarkows]

I have many hours in the 850 and I didn't think it worked that way, but between us I'm not the expert so I'll defer.

Thanks for the quick look!