END AIRFOILS WITH RECESSES AND APPROPRIATE SYSTEMS AND METHODS Russian patent published in 2013 - IPC B64C23/06 B64C3/10 B64C5/08 

Abstract RU 2492111 C2

FIELD: transport.

SUBSTANCE: invention relates to end airfoils including surfaces with recesses and to method of rag reduction. Aircraft system comprises wing and end airfoil (winglet, end plates, Whitcomb endplate) connected with wing end outer section. End airfoil has first surface facing fuselage side and second surface directed outward. First surface comprises area with recess. Note here that the wing includes airfoil sections located from wing inner area to outer area. End airfoil is used with the wing that features no changes on common shapes of airfoil sections located nearby wing outer area.

EFFECT: decreased influence of interferences caused by flows at wing-end airfoil transition, reduced drag.

13 cl, 13 dwg

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RU 2 492 111 C2

Authors

Malakhovski Adam P.

Chejni Stiven R.

Ehbner Normehn K.

Ledu Stiven T.

Dates

2013-09-10Published

2009-03-20Filed