King Air E90 Propeller.

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Presentation transcript:

King Air E90 Propeller

Constant Speed Principles Blade Angle vs. RPM High Angle – Low RPM Low Angle – High RPM Constant Speed Principles Prop Governor adjusts blade angles to maintain RPM On Speed – Blade Angle OK

Constant Speed Principles Blade Angle vs. RPM High Angle – Low RPM Low Angle – High RPM Constant Speed Principles Prop Governor adjusts blade angles to maintain RPM Over Speed – Blade Angle increases On Speed – Blade Angle OK

Constant Speed Principles Blade Angle vs. RPM High Angle – Low RPM Low Angle – High RPM Constant Speed Principles Prop Governor adjusts blade angles to maintain RPM Over Speed – Blade Angle increases On Speed – Blade Angle OK Under Speed – Blade Angle decreases

Propeller Governor Fly-Weights Speeder Spring Pilot Valve Beta Valve Beta Ring Low Pitch Stop Nut

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Low Pitch Stop Nut Pulls Beta Ring Forward Propeller Governor Low Pitch Stop RPM Setting Actual RPM Under-Speed 2000 1990 Beta Valve Closes Low Pitch Stop Nut Pulls Beta Ring Forward

Over-Speed Governor Pre-set: 2288 RPM

Over-Speed Governor Prop Gov. Failed

At 2288 RPM Overspeed Governor Prop Gov. Failed At 2288 RPM Overspeed Governor Assumes Control

Do you like what you’ve see so far? Do you want to see the rest of this system presentation? Send me an Email at larry@larryyorkaviation.com for information on how to schedule a King Air course tailored to your training needs.