What happens while starting the RIMS if the emergency stop reaches 13,000 RPM?

What happens while starting the RIMS if the emergency stop reaches 13,000 RPM?

• A. Temperature rises above 800 F
• B. Temperature at 900 F
• C. Less than 600 F
• D. Temperature reaches 1200 F

Answer: (C)

When starting the RIMS, the system is set up so that ignition and fuel flow are controlled to avoid overheating during the start sequence. If the emergency stop is reached at a high speed (13,000 RPM), fuel and ignition are cut off. The rotor may still be turning due to inertia, but without combustion there’s no heat build-up in the combustor. So the temperature stays well below ignition levels, resulting in a temperature under 600 F. If fuel were allowed and ignition occurred, temperatures would rise much higher (800–1200+ F), but with the emergency stop active, that heat source isn’t present.

When starting the RIMS, the system is set up so that ignition and fuel flow are controlled to avoid overheating during the start sequence. If the emergency stop is reached at a high speed (13,000 RPM), fuel and ignition are cut off. The rotor may still be turning due to inertia, but without combustion there’s no heat build-up in the combustor. So the temperature stays well below ignition levels, resulting in a temperature under 600 F. If fuel were allowed and ignition occurred, temperatures would rise much higher (800–1200+ F), but with the emergency stop active, that heat source isn’t present.