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Difference between revisions of "Beta Range"

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==Description==
 
==Description==
The beta range is used for ground operations inclusive of slowing the aircraft after landing. Below flight idle, the power levers control the [[Blade Pitch|blade pitch]] directly. At the power lever ground idle position, blade pitch is such that the propeller produces its minimum level of thrust. By moving the power levers from the ground idle position towards maximum reverse, the propeller blades go into [[Reverse Pitch|reverse pitch]] which directs the airflow from the propeller forward which will assist in reducing the aircraft speed during the landing roll or allow for intentionally moving the aircraft backwards.
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The beta range is used for ground operations inclusive of slowing the aircraft after landing. Below flight idle, the power levers control the [[Blade Pitch|blade pitch]] directly. At the power lever ground idle position, blade pitch is such that the propeller produces its minimum level of thrust. By moving the power levers from the ground idle position towards maximum reverse, the propeller blades go into [[Reverse Pitch|reverse pitch]] which directs the airflow from the propeller forward. This will assist in reducing the aircraft speed during the landing roll and also allow for intentionally moving the aircraft backwards.
  
 
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Revision as of 20:37, 29 March 2014

Article Information
Category: General General
Content source: SKYbrary About SKYbrary
Content control: EUROCONTROL EUROCONTROL

Definition

Beta Range - in a turboprop engine, is the range of power lever positions between flight idle and maximum reverse.

Description

The beta range is used for ground operations inclusive of slowing the aircraft after landing. Below flight idle, the power levers control the blade pitch directly. At the power lever ground idle position, blade pitch is such that the propeller produces its minimum level of thrust. By moving the power levers from the ground idle position towards maximum reverse, the propeller blades go into reverse pitch which directs the airflow from the propeller forward. This will assist in reducing the aircraft speed during the landing roll and also allow for intentionally moving the aircraft backwards.

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