Translational lift

Translational lift (also known as Effective Translational Lift, or ETL) is a transitional state present after a helicopter has moved from hover to forward flight. This state provides extra lift, most typically, when the airspeed reaches approximately 16-24 knots, but is present with any horizontal flow of air across the rotor, and therefore can be present without any forward motion of the aircraft, given prevailing wind conditions. As a result, the tail rotor also becomes more efficient due to the wind bubble that is formed around the helicopter from progressively less turbulent air.

单词	Translational Lift
释义	Translational Lift 英语百科 Translational lift Translational lift (also known as Effective Translational Lift, or ETL) is a transitional state present after a helicopter has moved from hover to forward flight. This state provides extra lift, most typically, when the airspeed reaches approximately 16-24 knots, but is present with any horizontal flow of air across the rotor, and therefore can be present without any forward motion of the aircraft, given prevailing wind conditions. As a result, the tail rotor also becomes more efficient due to the wind bubble that is formed around the helicopter from progressively less turbulent air.
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