Description WING STRUCTURE OF FREE-FLIGHT FLYING OBJECT

Technical Field

[1] The present invention relates to a wing structure of a free-flight flying object and, more particularly, to a wing structure of a free-flight flying object which is a flying object controlled by a remote controller or an electric flying object driven by power, in which an angle of curvature formed between an extension line horizontally extended from a center point on the back of any one main wing, among the wings, i.e., main wings, positioned to the right and left sides of the flying object, and a tangent line on a center point on the surface of the main wing is greater than that of the other main wing, thereby maintaining the radius of stable rotation and leading the stable landing.

[2]

Background Art

[3] Generally, to obtain a lift force (hereinafter, called the lift') for flight of a flying object, the static pressure of the air flowing under the wings needs to be greater than the static pressure of the air flowing above the wings.

[4] Thus, to generate the lift by making a difference between the pressure of the air above and under the wings, the wing of the flying object has a camber line with curvature. The camber line means the connection of center lines of numberless circles inscribed in an airfoil formed in the shape of a wing, and the camber line means the line to indicate the extent of curvature of the airfoil.

[5] That is, a basic process to obtain the lift in the wing can be briefly explained by application of Bernoulli's equation. The total pressure (dynamic pressure + static pressure) on the upper and lower surfaces of the wing is fixed.

[6] Thus, when the dynamic pressure is increased by increasing the speed of the air passing through the upper surface of the wing, the static pressure above the wing decreases, and when the dynamic pressure is decreased by decreasing the speed of the air passing the lower surface of the wing, the static pressure under the wing increases, so that the difference between these static pressure generates the lift.

[7] Accordingly, the wing from which the lift can be easily generated has the shape with the camber line forming the curvature bulging outward towards the upper.

[8] A flying object rotates by ailerons attached to the outside of trailing edges of the main wings.

[9] For example, to rotate the flying object to the left, the left aileron moves upward to incline the left wing downward and the right aileron moves downward to push the right wing upward. As the result, the flying object rotates to the left.

[10] Further, side by side to the ailerons, flaps are respectively attached to the trailing edges. The flaps are deeply related to the generation of the lift of a flying object.

[11] The wings, i.e., the main wings, the ailerons and the flaps, which are connected to one another for interaction, move to perform their respective functions.

[12] However, the aforementioned constitutional elements are united in one body, many problems occur when a flying object operates a circular flight or takes off and lands. Consequently, it is difficult to complete an accurate and desirable flight.

[13]

Disclosure of Invention Technical Problem

[14] Therefore, the present invention has been made to solve the above problems, and it is an aspect of the present invention to provide a wing structure of a free-flight flying object, which stably performs a circular flight and take-off and landing as well as a flight even though wings, although main wings, ailerons and flaps are united with together.

[15] It is another aspect of the present invention to provide a wing structure of a free- flight flying object, which includes a control timer for controlling rotation speed and time of a motor in a control panel provided in a body, and which, when the flying object arrives at a predetermined altitude, performs the stable circular flight and the stable take-off and landing by controlling the rotation speed and driving time of a motor by the operation of the control timer.

[16]

Technical Solution

[17] In accordance with the present invention, the above and other aspects can be accomplished by a flying object, which includes a body, main wings and a tail and which is ordinarily driven by a mounted control panel for driving a motor and a battery included in the body, characterized in that:

[18] when the main wings positioned at both right and left sides, flaps respectively positioned inside tail edges of the main wings, and ailerons respectively positioned outside the flaps are united, an angle of curvature formed between an extension line horizontally formed from a center point on the back of one main wing and a tangent line on a center point on the surface of the main wing is greater than that of the other main wing;

[19] the angle of curvature of one main wing is greater than that of the other main wing by 20%;

[20] and a control timer is included in the control panel, to control a rotation speed, an operation time and the like of the motor when the flying object is at a predetermined

attitude or higher.

Advantageous Effects

[21] In accordance with the present invention, the wing structure of the free-flight flying object, which is a rudder-type free flying object flying while the main wings, flaps and ailerons are fixed, forms the angle of curvature formed between the extension line horizontally formed from the center point on the back of any one main wing, among the main wings each formed at right and left sides, and the ground wire on the center point on the surface of the main wing so as to be greater than that of the other main wing.

[22] Accordingly, the radius for stable rotation is maintained upon the circular flight and the stable landing is lead.

[23]

Brief Description of the Drawings

[24] These and other aspects and advantages of the present invention will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[25] FIG. 1 is a perspective view of a wing structure of a free flying object according to the present invention;

[26] FIG. 2 is a view of a power unit applied to the wing structure of the free flying object according to the present invention;

[27] FIG. 3 is a view of comparing the respective angles of curvature of main wings formed at both sides in the wing structure of the free flying object according to the present invention; and

[28] FIG. 4 is a view illustrating a trace of rotation in the wing structure of the free flying object according to the present invention.

[29]

Best Mode for Carrying Out the Invention

[30] As the best mode of the present invention, a wing structure of a free flying object can be carried out in an ordinary flying object which includes a body C, main wings 1 and a tail 2 and which is driven by mounting a control panel 3 for driving a motor M and a battery B included in the body.

[31] The wing structure of the free flying object is characterized in that: in the state that the main wings 1 positioned at both right and left sides, flaps 10 respectively positioned inside tail edges of the main wings 1, and ailerons 11 respectively positioned outside the flaps are united, an angle θ of curvature formed between an extension line horizontally formed from a center point 100 on the back of any one main wing 1, among the main wings 1 each formed at the right and left sides, and a tangent line on a center point 101 on the surface of the main wing 1 is greater than an

angle θ' of curvature of the other main wing 1, that is, θ > θ'. [32]

Mode for the Invention

[33] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[34] FIG. 1 is a perspective view of a wing structure of a free flying object according to the present invention, FIG. 2 is a view of a power unit applied to the wing structure of the free flying object, FIG. 3 is a view of comparing the respective angles of curvature of main wings formed at both sides in the wing structure of the free flying object, and FIG. 4 is a view illustrating a trace of rotation in the wing structure of the free flying object.

[35] Before the present invention is described with respect to its constitution, a structure of a general flying object will be described. The structure of the general flying object broadly includes a body C, main wings 1 and a tail 2.

[36] Further, a control panel 3 is mounted onto the flying object and drives a motor M and a battery B included in the body C, so that the flying object is driven.

[37] There are various methods for driving the flying object. For example, a user makes the flying object flown by controlling a wireless remote controller or by driving the motor by an independent switch positioned at the outside of the body C, without controlling the wireless remote controller. In addition, when the motor M is driven, the user may directly fly the flying object in the air so that an initial flight can be manually performed. The flying object can be flown by the other methods.

[38] The constitution of the present invention will be described in detail.

[39] In the wing structure of the free flying object, the main wings 1 positioned at both right and left sides, flaps 10 respectively positioned inside tail edges of the main wings 1, and ailerons 11 respectively positioned outside the flaps are united with together.

[40] In the above state, an angle θ of curvature formed between an extension line horizontally formed from a center point 100 on the back of any one main wing 1, among the main wings 1 each formed at the right and left sides, and a tangent line on a center point 101 on the surface of the main wing 1 is greater than an angle θ' of curvature of the other main wing 1, that is, θ > θ'.

[41] Specifically, for example, the angle θ of curvature of the main wing 1 positioned at the right side is greater than the angle θ' of curvature of the main wing 1 positioned at the left side. Preferably, it may be an optimum condition when the angle θ of curvature is greater than the angle θ' of curvature by 20%.

[42] As described in FIG. 2, the control panel 3 includes a control timer 30.

[43] The control timer 30 controls a rotation speed and an operation time of the motor M

when the flying object flies at a predetermined altitude or higher.

[44] The control timer 30 controls the rotation speed and operation time of the motor M when the flying object flies at the predetermined altitude or higher, so that the flying object can stably land upon a circular flight or landing.

[45] As described, when the angle of curvature of any one of the main wings each positioned at the right and left sides is greater than that of the other main wing by about 20%, the flying object rotates in the direction in which the angle of curvature is greater and stably lands.

[46] The process from an initial flight to a landing will be described.

[47] The initial flight may be performed by the various methods described above. After the flying object takes off toward the upper air by any one of the aforementioned methods, the flying object maintains the rising altitude up to the predetermined altitude or higher by the driving of the motor M.

[48] However, when the flying object is at the predetermined altitude or higher, the control timer 30 operates to control the rotation speed and operation time of the motor M.

[49] Then, the flying object flies with no motive power and naturally moves down while continuously rotating in the direction where the angle of curvature is greater (θ > θ'), to finally safely land.

[50] According to the above described operation, the main wings 1, flaps 10 and ailerons

11 can be separately operated, the flaps 10 operate to generate the lift and the ailerons 11 operate to stably perform the circular flight.

[51] However, in wing structure of the free flying object according to the present invention, the functions separately performed by the flaps and ailerons 11 in the conventional art can be performed by controlling the angle of curvature of the main wings.

[52] The invention has been described using preferred exemplary embodiments.

[53] However, it is to be understood that the scope of the invention is not limited to the disclosed embodiments.

[54] On the contrary, the scope of the invention is intended to include various modifications and alternative arrangements within the capabilities of persons skilled in the art using presently known or future technologies and equivalents.

[55] The scope of the claims, therefore, should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.

[56]

Industrial Applicability

[57] In accordance with the present invention, there can be provided a flying object for a toy, having the wing structure of the free flying object, in which the easy circular flight

and the stable landing can be secured by manipulation of the user.

[58] Therefore, the present invention has the industrial applicability as the toy flying object for play.