The Speed Sensitive Valve vents until the engine reaches which rpm?

The Speed Sensitive Valve vents until the engine reaches which rpm?

• A. 12,780 rpm
• B. 12,000 rpm
• C. 13,000 rpm
• D. 11,780 rpm

Answer: (A)

The speed sensitive valve is part of the engine’s air system that helps control compressor stability during acceleration. It vents or bleeds air to reduce pressure in the bleed path so the compressor doesn’t surge as the spool is coming up to speed. It does this only up to a predetermined engine speed where the compressor can maintain stable operation without bleed air. Once that target speed is reached, the valve closes and the system retains air for normal operation, allowing the engine to continue accelerating toward higher RPM without the extra venting.

The speed sensitive valve is part of the engine’s air system that helps control compressor stability during acceleration. It vents or bleeds air to reduce pressure in the bleed path so the compressor doesn’t surge as the spool is coming up to speed. It does this only up to a predetermined engine speed where the compressor can maintain stable operation without bleed air. Once that target speed is reached, the valve closes and the system retains air for normal operation, allowing the engine to continue accelerating toward higher RPM without the extra venting.