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Rotorcraft Flying Menu > Introduction
to the Helicopter >Antitorque
Systems > Fenestron
Another form of antitorque rotor is the fenestron
or “fan-in-tail” design. This system uses a series
of rotat-ing blades shrouded within a vertical tail. Because
the blades are located within a circular duct, they are less
likely to come into contact with people or objects. [Figure
1-4]
Figure 1-4. Compared to an unprotected
tail rotor, the fene-stron antitorque system provides an improved
margin of safety during ground operations.
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