FIELD: aircraft engineering.
SUBSTANCE: invention relates to aircraft engineering. Surface (11) of an aircraft tail unit, such as a horizontal stabilizer or a vertical stabilizer, comprises front edge (14). Front edge (14) has in the section along the tail unit span a wavy shape formed by a continuous sequence of smooth projections (17) and recesses (19). Under the ice formation conditions icing takes place only on tops of the said projections (17) and on bottoms (20) of the said recesses (19).
EFFECT: invention reduces the harmful effect of icing on aerodynamic characteristics.
8 cl, 13 dwg
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