At what RPM will EPECS automatically feather the propeller after an overspeed condition?

Prepare for the PC-12 NGX Test with our quiz. Master the essentials with flashcards and multiple choice questions, each with hints and explanations. Get ready for your exam!

Multiple Choice

At what RPM will EPECS automatically feather the propeller after an overspeed condition?

Explanation:
When an overspeed event is detected, the system automatically feathers the propeller to reduce drag and protect the engine. In the NGX, this auto-feather action is triggered at about 1845 RPM. That specific threshold is chosen so the prop speeds are brought under control quickly when overspeed occurs, without feathering during normal operation near cruise. Feath ering moves the blades to a high-pitch, low-drag position, helping the engine and prop system recover from the overspeed condition.

When an overspeed event is detected, the system automatically feathers the propeller to reduce drag and protect the engine. In the NGX, this auto-feather action is triggered at about 1845 RPM. That specific threshold is chosen so the prop speeds are brought under control quickly when overspeed occurs, without feathering during normal operation near cruise. Feath ering moves the blades to a high-pitch, low-drag position, helping the engine and prop system recover from the overspeed condition.

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