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ETL
- Usado para
- effective translational lift
- Fonte1
- FEDERAL AVIATION ADMINISTRATION. Helicopter flying handbook (FAA-H8083-21A). Washington, DC: FAA, 2012.
- Nota adicional1
- Translational lift is present with any horizontal flow of air across the rotor. This increased flow is most noticeable when the airspeed reaches approximately 16 to 24 knots. As the helicopter accelerates through this speed, the rotor moves out of its vortices and is in relatively undisturbed air. The airflow is also now more horizontal, which reduces induced flow and drag with a corresponding increase in angle of attack and lift. The additional lift available at this speed is referred to as "effective translational lift" (ETL).
- Nota adicional2
- While transitioning to forward flight at about 16 to 24 knots, the helicopter goes through effective translational lift (ETL).
- Subárea1
- Aerodynamics
- Português
- sustentação translacional efetiva