A double-slotted flap fixedly connected to an additional wing

Abstract

The invention belongs to the technical field of aircraft wings, and in particular relates to a double-slit flap in which the flap is fixedly connected to an additional wing. It includes additional wings and flaps, which are fixedly connected by connecting rods, and the fixedly connected additional wings and flaps are retractable under the action of a set of driving connection mechanisms as a whole; When the wings are in the lowered state, there is a gap between the main wing and the additional wing, and between the additional wing and the flap, which produces the lift-increasing effect of the double-slotted flap. The double-slot flap of the present invention realizes the effect of increasing the lift of the double-slot flap through the rigidly connected additional wing-flap structure when the flap is lowered, while maintaining its structural complexity comparable to that of the single-slit / Fuller flap. Under the condition of the same structural complexity, the lift force is improved, thereby reducing the demand for wing and flap area, reducing the weight of the aircraft, and improving the performance of the aircraft.

Description

technical field [0001] The invention belongs to the technical field of aircraft wings, in particular to a double-slotted flap in which a flap is fixedly connected with an additional wing. Background technique [0002] When the aircraft is in cruise flight, the flight speed is large, and the required wing area and airfoil camber are small, while the flight speed in the take-off and landing phase is small, and the required wing area and airfoil camber are large. To address the contradictory needs of the two types of situations, contemporary aircraft employ flaps of varying degrees of sophistication, which are retracted during cruise flight and lowered during takeoff and landing to increase lift. See the main types of trailing edge flap devices figure 1 . [0003] The lift-enhancing effect of the flaps is measured by the increment ΔCLmax of the maximum lift coefficient produced by the flaps down relative to the retracted state. In the two-dimensional case, the ΔCLmax of the ...

AI Technical Summary

Problems solved by technology

[0004] For small fixed-wing aircraft, single-slot flaps or Fuller flaps with relatively simple structures are usually used. The problem caused by this is that ΔCLmax is small. In order to obtain sufficient lift during take-off and landing, it is only possible to increase Large wing and flap area, resulting in increased structural weight, increased cruise flight resistance and other costs

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