Improvements in or relating to aircraft wings

摘要

869,065. Aircraft. SEBAC NOUVELLE S.A. Feb. 4, 1958 [Feb. 7, 1957], No. 3657/58. Class 4. In an aircraft wing, compressed gas is conveyed through a spanwise extending passage to one or more devices employing discharge of the gas through ejector slots employing the Coanda effect to entrain ambient gas from the wing interior, and discharging into first and second collectors, gas being discharged from the first collector through a spanwise extending Coanda slot on the upper surface of the wing, and from the second collector through arcuate passages formed between the trailing edge of the wing and a rotatable control surface of substantially circular crosssection with a rearwardly projecting fin. The Figure is a cross-section of a wing, wherein a passage 1 extending spanwise is fed with compressed air from a source within the fuselage, and delivers at spanwise intervals into pairs of duct 2 (one pair shown) leading to pairs of manifolds 3 annular in plan, each joined by ducts 6 to an annular chamber 5. This chamber discharges through a slot 7, the issuing gas following the curve of surfaces 9 into collector members 11 feeding an annular chamber 12. The gas jet from slot 7 entrains air from the interior of the wing into chamber 12, and thus sucks ambient air through apertured areas, 18, 16, of the wing skin to remove the boundary layer. The width of slot 7 can be varied by relative movement of its walls. All the chambers 12 are connected by ducts 21 to a spanwise extending first collector 22 discharging through a slot 25, one wall of which is curved to induce the issuing gas to follow the upper surface of the wing. All the annular chambers 12 are connected by ducts 23 to a second collector 24 partially obturated by a flap comprising a cylindrical portion 31 and fin 32. Upper and lower arcuate slots 37, 371 are formed for the discharge of gas jets, these slots being divided at spanwise intervals by webs 39, 391 on the flap. The axis of rotation 41 of the flap is offset from the axis 33 of the cylindrical portion 31, so that the widths of the slots vary as the flap is deflected. The flap is formed with recesses at 40, 401.