Wingtip sail device for fixed-wing general-purpose aircraft
A wingtip sail and fixed wing technology, applied in the field of wingtips, can solve problems such as unreasonable and unscientific structural design, poor lift and drag reduction performance, and achieve the effects of reducing induced drag, improving aerodynamic efficiency, and increasing lift
Active Publication Date: 2016-02-24
石家庄飞机工业有限责任公司
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Problems solved by technology
[0003] The purpose of the present invention is to provide a wingtip sail device for a fixed-wing general-purpose aircraft, to solve the problem of unreasonable structural design of the existing wingtip sail device, unscientific design of the number of sails, dihedral angle and installation angle, resulting in increase and decrease The problem of poor resistance
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[0009] Such as figure 1 As shown, the present invention is provided with a rectifying cone 2 on the end 1, and a front sail sheet 3, a middle sail sheet 4 and a rear sail sheet 5 are spirally arranged at the rectification cone 2 from front to back; wherein the dihedral angle of the front sail sheet is 30°, the installation angle is -5°; the dihedral angle of the middle sail is 15°, the installation angle is -2.5°; the anhedral angle of the back sail is 0°, the installation angle is 0°; its end 1, rectifying cone 2 and the three sails are all made of epoxy glass fiber reinforced plastics, and three reinforcing linings 6 are fixed inside the end 1 and the rectifying cone 2, and the reinforcing lining 6 is composed of end ribs and horizontal frames, and the reinforcing linings 6 is made of aviation laminates, which can withstand strong aerodynamic loads and inertial loads to ensure the strength and rigidity of the rectifying cone 2 and each sail; the rectifying cone 2 and the rei...
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The invention relates to a wing tip sail device for a general fixed-wing aircraft. A rectifying cone is arranged on a wing tip en and is spirally provided with a front sail, a middle sale and a back sail from front to back, wherein the dihedral angle and the installation angle of the front sail are 30 DEG and -5 DEG, respectively, the dihedral angle and the installation angle of the middle sail are 15 DEG and -2.5 DEG, respectively, and the dihedral angle and the installation angle of the back sail are 0 DEG and 0 DEG, respectively. The wing tip sail device provided by the invention has the advantages of a simple structure and convenient installation, can effectively comb and straighten wing tip vortices when arranged on the wing tip of the aircraft and is capable of reducing induced drag during flight of the aircraft, improving pneumatic efficiency of the sails and enhancing lifting force of the body of the aircraft.
Description
technical field [0001] The invention relates to a wingtip on a fixed wing of an aircraft, in particular to a wingtip sail device for a general fixed wing aircraft. Background technique [0002] When the aircraft is in flight, part of the air with higher pressure on the surface of the wing flows to the trailing edge of the wing, and the other part flows around the wingtip to the upper surface of the wing, forming a wingtip vortex, which will cause the aircraft to lift during flight Reduced, induced resistance increased. At present, the wings of low-speed fixed-wing general-purpose aircraft generally adopt medium aspect ratio, straight wings, and elliptical modification at the wingtips, but the induced drag of this wing configuration is relatively large, accounting for about 43% of the resistance, and about 56% of the total resistance in the climbing state. In order to reduce induced drag and increase lift, wingtip devices such as wingtip sail devices are often used at home ...
Claims
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IPC IPC(8): B64C3/36
Inventor 崔章栋孙凤琴王丽杰杨荣桂苏宇杰崔志华苌军红
Owner 石家庄飞机工业有限责任公司