Sonaca S.a.

Christian Overbergh

Stéphane Debaisieux

S&eacute;bastien Quets

St&eacute;phane Debaisieux

Michel Hautecoeur

Sébastien Quets

The invention relates to a leading edge mobile flap () for a main wing of an aircraft, this flap including an aerodynamic skin () that has a bird impact-sensitive frontal area (), and a rear skin () integral with the aerodynamic skin (), the flap also comprising a plurality of ribs () spaced out along a leading edge longitudinal direction (X'). According to the invention, the flap additionally includes, between two directly consecutive ribs, a single rigid bird trajectory-deflecting wall () anchored to the skins (). Furthermore, in a cross-section taken along any plane orthogonal to the direction (X&#x2032;), the wall () forms with a geometric chord () of the flap an angle (&#x3b1;) with a value of less than 45&#xb0;.

Mobile leading edge flap for a main wing of the aerofoils of an aircraft and main wing provided with such a flap

A structure ( ) in the shape of an aerodynamic panel in which adjacent cells ( ) are formed by placing a stack of three metal plates in a mold. After diffusion welding of the plates at the required locations, a first variable pressure is applied in a first series of cells ( ) formed between the outer plate and the intermediate plate and a second independent pressure approximately constant and lower than the first is applied in the other cells ( ) and on the inner face of the stack. Thus, this partially forms the cells and shapes the structure in contact with a complementary surface of the mold. The final conformation of the cells and the structure is obtained by applying a second pressure cycle in the cells and on the inner face of the stack.

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Ciney, Belgium

Christian Overbergh