What is the maximum continuous ITT value?

What is the maximum continuous ITT value?

• A. 960C
• B. 970C
• C. 980C
• D. 950C

Answer: (A)

The main idea is understanding why engines have different ITT limits for continuous versus short-duration operations. ITT, or turbine inlet temperature, reflects the heat the turbine can safely handle. The continuous ITT limit is set to protect turbine blades and other hot-section components during long, steady operation. It represents the temperature you can sustain without causing long-term damage. For the CRJ-550 engine limits, the value you can hold indefinitely is 960 C. This is the ceiling for sustained operation, so you should not let ITT exceed this value for an extended period. Higher ITT numbers exist for brief periods during takeoff or rapid throttle changes, where brief overheating is acceptable within prescribed time limits, but they cannot be maintained continuously. If ITT approaches 960 C, you’d adjust thrust to keep it within the continuous limit and protect the engine.

The main idea is understanding why engines have different ITT limits for continuous versus short-duration operations. ITT, or turbine inlet temperature, reflects the heat the turbine can safely handle. The continuous ITT limit is set to protect turbine blades and other hot-section components during long, steady operation. It represents the temperature you can sustain without causing long-term damage.

For the CRJ-550 engine limits, the value you can hold indefinitely is 960 C. This is the ceiling for sustained operation, so you should not let ITT exceed this value for an extended period. Higher ITT numbers exist for brief periods during takeoff or rapid throttle changes, where brief overheating is acceptable within prescribed time limits, but they cannot be maintained continuously. If ITT approaches 960 C, you’d adjust thrust to keep it within the continuous limit and protect the engine.