Inglês/Português
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Back to: "F"feathering
- Definição1
- (1) The process of changing the pitch of a propeller's blades to produce zero torque and to reduce drag to the minimum so as to prevent further damage to an engine that has been shut down either automatically or manually after a malfunction. In this process, the propeller blades are turned until the blade-chord lines are almost parallel to the airflow, and there are no rotating forces acting on the propeller as a whole. (2) The ability of a rotor blade to rotate about its chord axis. This takes place as a result of a change in the collective, or cyclic, pitch. (3) The action that changes the pitch angle of helicopter blades by rotating them about their feathering axis.
- Fonte1
- KUMAR, Bharat (ed.). An illustrated dictionary of aviation. New York: McGraw-Hill, c2005. 752 p.
- Definição2
- The changing of the angle of the rotor blades during a revolution equalizing lift on the advancing and retreating blades. This term is sometimes used in relation to pitch change through the collective.
- Fonte2
- SCHAFER, Joe. Helicopter maintenance. Englewood: Jeppesen Sanderson, Inc., c2007. viii, 343 p.
- Definição3
- The action that changes the pitch angle of the rotor blades by rotating them around their feathering (spanwise) axis.
- Fonte3
- 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.
- Contexto
- A semirigid rotor system allows for two different movements, flapping and feathering.
- Subárea1
- Rotorcraft
- Related Term
- unfeather
- Português
- embandeiramento
- Imagem
