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==Definition==
 
==Definition==
'''Beta Range''' - in a [[Turboprop Engine|turboprop engine]], is the range of [[Throttle Lever|power lever]] positions between flight idle and maximum reverse.
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'''Beta Range''', in a [[Turboprop Engine|turboprop engine]], is the range of [[Throttle Lever|power lever]] positions between flight idle and maximum reverse.
  
 
==Description==
 
==Description==
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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. With the power lever(s) in the ground idle position, the blade pitch is such that the propeller produces its minimum level of thrust. By moving the power lever 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 will allow for intentionally moving the aircraft backwards.
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==Related Articles==
 
==Related Articles==
 
*[[Alpha Range]]
 
*[[Alpha Range]]
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[[Category:Glossary]]
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[[Category:General]]

Latest revision as of 14:09, 20 July 2017

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. With the power lever(s) in the ground idle position, the blade pitch is such that the propeller produces its minimum level of thrust. By moving the power lever 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 will allow for intentionally moving the aircraft backwards.

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