What is the maximum temperature allowed for engine operation during start?

The maximum temperature allowed for engine operation during start is 900°C. This limit is crucial because exceeding this temperature can result in engine damage or increased wear. During the starting phase, the engine experiences a significant thermal stress as it transitions from a cold state to operational temperatures. The 900°C maximum ensures that the engine maintains a safe thermal profile while providing sufficient power to start effectively.

This limit is established based on extensive testing and operational experience to protect the integrity of the engine components, including the turbine blades and combustor materials. Operating within the specified temperature limits allows for optimal engine performance and longevity, ensuring reliability in service.