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drag
Definição1
The force tending to resist an airfoil's passage through the air. Drag is always parallel to the relative wind and perpendicular to lift.
Fonte1
SCHAFER, Joe. Helicopter maintenance. Englewood: Jeppesen Sanderson, Inc., c2007. viii, 343 p.
Definição2
An aerodynamic force on a body acting parallel and opposite to relative wind.
Fonte2
FEDERAL AVIATION ADMINISTRATION. Rotorcraft flying handbook (FAA-H-8083-21). Washington, DC: FAA, 2000. Disponível em: http://www.faa.gov/library/manuals/aircraft/media/faa-h-8083-21.pdf. Acesso em: 10 fev. 2012.
Definição3
The force that resists the movement of a helicopter through the air and is produced when lift is developed is called drag. Drag always acts parallel to the relative wind. Total drag is composed of three types of drag: profile, induced, and parasite.
Contexto
Even the slightest bit of frost, ice, or snow can reduce lift by 30 percent and increase drag by 40 percent.
Subárea1
Aerodynamics
Related Term
force
induced drag
parasite drag
profile drag
total drag
Português
arrasto