Definition
The temperature of the hot gases passing through or leaving the turbine section of a turbine engine, measured by probes at a specific point in the gas path and used as a primary limit for engine operation. In a fixed-shaft turboprop, turbine temperature is one of the main parameters the pilot monitors and controls to keep the engine within its operating limits during start, takeoff, climb, and cruise.
Plain English
How hot the gases are inside the turbine part of the engine. The pilot watches this number to make sure the engine is not running too hot.
Context Anchor
Seen in turboprop engine operation, especially when monitoring a fixed-shaft turboprop during start and power changes.
Derivation
From Latin turbo meaning a spinning thing or whirlwind. The turbine is the spinning section of the engine driven by hot gases, so 'turbine temperature' simply means how hot those gases are at that point in the engine.
Why Pilots Care
Keeping turbine temperature within limits prevents blade damage and extends engine life; exceeding limits requires immediate power reduction or shutdown.
Grounding Statement
When fuel burns in the engine, the hot gas must stay within a safe temperature range as it passes through the turbine area.
Intuition Check
Turbine temperature is not outside air temperature and it is not oil temperature. It is the heat reading for the hot gas in or near the turbine section of the engine.
Example Sentence 1
During start, the pilot watched turbine temperature closely to make sure it stayed below the published start limit.
Example Sentence 2
During the climb the turbine temperature stayed well below the redline, allowing continued power settings.