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Do helicopters have wake turbulence?
Depending on the size of the helicopter, significant wake turbulence can be generated. Helicopter wakes may be of significantly greater strength than those from fixed-wing aircraft of similar weight. The strongest wake turbulence can occur when the helicopter is operating at lower speeds (20 to 50 knots).
How do you fly through wake turbulence?
Departing behind a larger aircraft. Continue climbing above the larger aircraft’s climb path until turning clear of the larger aircraft’s wake. Avoid subsequent headings which will cross below and behind a larger aircraft. Be alert for any critical takeoff situation which could lead to a vortex encounter.
How does a helicopter generate a wake vortex?
In forward flight, the downwash from the main rotor of a helicopter is transformed into a pair of trailing vortices comparable to the wing tip vortices generated by a fixed wing aircraft and there is some evidence that these vortices are more intense than those from a similar-weight fixed-wing aircraft.
Can a helicopter be affected by wake turbulence?
Helicopters are also susceptible to the effects of wake turbulence from large fixed wing aircraft, and ICAO separation requirements apply equally to helicopters as well as fixed wing aircraft.
How can the vortex speed of an aircraft be changed?
The vortex characteristics of any given aircraft can also be changed by extension of flaps or other wing configuring devices as well as by change in speed. However, as the basic factor is weight, the vortex strength increases proportionately. Peak vortex tangential speeds exceeding 300 feet per second have been recorded.
Where do pilots need to avoid wake turbulence?
Most of the energy is within a few feet of the center of each vortex, but pilots should avoid a region within about 100 feet of the vortex core. FIG 7-3-1 Wake Vortex Generation 7-3-3. Vortex Strength a. The strength of the vortex is governed by the weight, speed, and shape of the wing of the generating aircraft.