KR101229944B1 - Virtually invisible aerial vehicle - Google Patents

Abstract

The present invention relates to a virtual transparent aircraft, more specifically, the surface of the fuselage is coated with a material that reflects light and the wing is made of a transparent material to produce an effect that looks transparent during the flight, so that it is not visible to the observer on the ground It is about.

According to the present invention, the fuselage surface acts as a mirror to reflect light, allowing the observer to recognize the absence of the aircraft by viewing the sky reflected from the surface of the aircraft, especially when the aircraft is not observed by the other party during military operations. Enables mission to be performed by

Optical, reflective, transparent, air vehicle.

Description

VIRTUALLY INVISIBLE AERIAL VEHICLE}

The present invention relates to a virtual transparent aircraft, more specifically, the surface of the fuselage is coated with a material that reflects light and the wing is made of a transparent material to produce an effect that looks transparent during the flight, so that it is not visible to the observer on the ground It is about.

Airplanes are generally used for civil, passenger and cargo transportation, agriculture, aerial photographs, and for military surveillance and reconnaissance, transport, attack, and command. Nowadays, the development of electronics improves the performance of unmanned aerial vehicles, which is increasing the proportion of missions.

Airplanes used for military use are classified into reconnaissance planes, commanders, fighter planes, bombers, and bombers depending on the purpose of the mission, and are classified into helicopters, propeller aircrafts, jet aircrafts, rockets, etc. according to engine or body type.

It is important that all aircraft used for military use are secretly maneuverable without being detected by the enemy. To this end, efforts have been made to paint the aircraft's fuselage or wing surface in a color similar to the sky, to minimize cross-sectional areas, or to reduce noise. In particular, since World War II, when radar technology that detects airplanes by radio waves has been widely used, stealth technology has been developed to reduce reflections from airplanes caused by electromagnetic waves, resulting in the form of stealth reconnaissance aircraft, stealth bombers, and stealth helicopters. Is being developed.

However, even planes that are not detected by the radar can be visually recognized when they enter the human field of view, and there is a risk of being detected and shot. Especially in the case of unmanned reconnaissance planes, bombers and bombers aimed at gathering information, the risk is even greater.

Various optical stealth technologies have been proposed to make it difficult for an observer to detect the plane optically. However, the best alternative is to look essentially transparent as with electromagnetic waves.

Making airplanes transparent is the most difficult way to make airplanes transparent, but this is important. Wings can be made almost transparent if the aircraft's wings are not filled with fuel or equipped with observation equipment. In addition, the propeller can be manufactured almost transparent if the internal structure is not complicated. However, it is impossible to make the interior transparent because people need to board or install an engine inside the plane. Therefore, it is important to make the aircraft appear transparent by using appropriate means outside the fuselage. If you're attaching an engine or payload to a wing, you can make it a transparent fuselage.

Therefore, the key is how to make the fuselage transparent.

The present invention was devised to solve the above problems, and by the fuselage surface acting as a mirror with light reflection, the observer to recognize the absence of the aircraft by seeing the appearance of the sky reflected from the surface of the aircraft, in particular Its purpose is to enable the mission to be carried out by aircraft without being observed by the opponent during military operations.

In order to achieve the above object, the light reflecting material according to the present invention has a transparent effect, but the airborne conditions surrounding the air vehicle, the angle of the air vehicle and the vertical line of the ground by the turning flight, the observer is flying aircraft When a certain element including the angle of the view of the eye viewed from the ground and the angle of the 'V' shape of the aircraft satisfies a certain condition, the aircraft exhibiting the transparent effect is obtained from the front to the rear of the aircraft. A lower body having a 'V' shape and a surface made of a material which reflects light; A propulsion device coupled to the fuselage to propel a vehicle; A wing of transparent material coupled to the body to impart lift to the body; And a control device for controlling the vehicle, and satisfies b-2a ≥ 2k in order to show the transparent effect of the aircraft, wherein b is a view of a gaze viewed by an observer at a specific point in view of the aircraft in flight. Direction is an angle formed with the ground, and a is an angle formed by a straight line perpendicular to the ground and the center line of the aircraft, wherein 2k is an angle of the 'V' shape of the 'V'-shaped vehicle 100. The propulsion device includes at least one of a propeller, a jet engine, and a rocket engine, wherein the jet engine and the rocket engine are included in the fuselage having a 'V'-shaped transparency effect, and the housing surrounding the propeller is a' V '. It is shaped like a magnet and its surface reflects light.

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The control unit may be a manned or unmanned control unit.

The angle of the 'V' shape of the lower body is preferably 10 degrees to 30 degrees.

Also preferably, the inside of the body surface is made of a material capable of absorbing electromagnetic waves so as not to be captured by the radar.

Surfaces other than the 'V'-shaped surface of the body may have a stealth structure for scattering incident electromagnetic waves in a direction other than the incident direction.

The propeller may be made of a transparent material.

The control unit may control to change or maintain the vertical axis of the fuselage at a specific angle so that the ground is not reflected through the fuselage surface when the observer on the ground is detected during the flight.

According to another aspect of the present invention, by using a material that reflects light, the effect of making it look transparent, but the airborne conditions surrounding the aircraft, the angle of the aircraft to form a vertical line of the ground by the turning flight, the observer looking up at the aircraft in flight When a certain element including the angle of the direction of the plane to the ground and the angle of the 'V' shape of the aircraft satisfies a predetermined condition, the aircraft having the transparent visible effect has a 'V' shape at the bottom, The surface is made of a material that reflects light, the inside is a floating body filled with lighter than air; And an altitude control device that adjusts the altitude of the vehicle, and satisfies b-2a ≥ 2k in order to show the transparent effect of the aircraft, wherein b is an observer at a specific point looking up at the aircraft in flight. The direction of the line of sight is an angle formed with the ground, and a is an angle formed by a straight line perpendicular to the ground and the center line of the aircraft, and 2k is an angle of the 'V' shape of the 'V' shaped vehicle 100. .
The angle of the 'V' shape of the lower part of the float is preferably 10 degrees to 30 degrees.

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Also preferably, the inside of the surface of the floating body is made of a material capable of absorbing electromagnetic waves so as not to be captured by the radar.

Surfaces other than the 'V' shaped surface of the floating body may have a stealth structure for scattering incident electromagnetic waves in directions other than the incident direction.

According to another aspect of the invention, the method for controlling the flight path of the virtual transparent aircraft, (a) detecting the direction of the incident light of the sun during flight; And (b) controlling a flight path in a direction parallel to the sensed solar incident light so as to maximize the transparency effect to the observer.

According to the present invention, the surface of the fuselage acting as a mirror with light reflection allows the observer to recognize the absence of the aircraft by viewing the sky reflected from the surface of the aircraft, and is not observed by the opponent in particular during military operations. It has the effect of enabling the mission to be carried out by aircraft.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

1 is a perspective view of a virtual transparent flying vehicle 100 according to a preferred embodiment of the present invention.

Referring to the drawings, the virtual transparent flying body 100 is a 'V' shape of the lower portion 11 from the front end to the rear end and lifts the lift body 10 and the body 10 made of a material reflecting light on the surface. Imparting wings 21, 22, and 23, and although not shown in the figure may further include a take-off and landing device such as wheels used for take-off and landing. Means for supplying the thrust force may include a propeller 30, a jet engine or a rocket.

The body 10 is formed by forming a base frame made of metal and then covering the outside of the upper metal surface with a material capable of reflecting light. The body 10 had a lower portion 11 from the front end to the rear end in a 'V' shape. The angle of the 'V' shape is about 10 to 30 degrees, more preferably 15 to 25 degrees. In this way, when the observer in the radius of the flight altitude sees the plane, the angle of incidence on the surface of the fuselage 10 is small and total reflection occurs, and the observer sees the sky reflected from the fuselage surface, so that the image of the fuselage cannot be seen and is optically visible. Will not. This will be described later in more detail with reference to FIGS. 5 to 8.

The wing may be composed of a horizontal wing 21 coupled to the middle of the body 10 and a horizontal wing 22 and a vertical wing 23 coupled to the stern. Since the wings 21, 22, and 23 cannot be configured in a 'V' shape like the body 10, it is preferable that the wings 21, 22, and 23 are made of a transparent material.

Horizontal wings 21 of the above transparent wings may be provided with one or more propellers 30, respectively. The propeller 30 is rotated to supply the propulsion force to the fuselage 10 from the turbine. The propeller 30 that is rotating at a high speed while being far away is difficult to distinguish by the resolution of the human eye, but the propeller may be made of a general material, but may be made of a transparent material to more clearly ensure the transparent effect. The housing surrounding the propeller 30 is made transparent, or like the fuselage to produce a 'V' shape. The propeller 30 may be attached to the body 10 nose to give a driving force. If you put it in the nose, you do not need to make the housing transparent. Alternatively, the propeller 30 may be attached to the stern of the body 10 to obtain propulsion force. As in the case where the propeller 30 is placed in the nose, it is possible to use a non-transparent propeller housing.

Although not shown in the drawing, the upper fuselage lower part of the fuselage 10 after the take-off inside the fuselage 10 is invisible to the observer is attached to the landing and landing device to help the landing during landing. After takeoff, it will be folded inside the fuselage 10 so it does not have to be transparent. Therefore, it can be used by mounting a general takeoff and landing gear.

2 is a front view of the virtual transparent flying vehicle 100 according to the preferred embodiment of the present invention.

The body 10 is formed by forming a base frame made of metal and then covering the outside of the metal surface with a material 12 capable of reflecting light. That is, the lower part 11 of the fuselage 10 is a plate 12 surface-treated with a material that reflects light to act as a mirror, and a material capable of absorbing electromagnetic waves such as radar in contact with the inside. It is good to provide (13). This configuration can be used not only by the observer's naked eye, but also by the electromagnetic aspect, so as not to be captured by the radar.

3 is a view from above of the virtual transparent flying vehicle 100 according to a preferred embodiment of the present invention.

4 is a view showing a virtual transparent flying vehicle from below, according to a preferred embodiment of the present invention. The portion shown by the middle line 14 represents the lowermost portion of the 'V' shape.

5 is a view for explaining the principle of operation of the virtual transparent aircraft 100 of the present invention, when the airborne conditions around the aircraft satisfies a predetermined condition has a great effect, the operation principle is as described below.

The surface of the vehicle 100 is made of a material that reflects light 51, so that when the observer 'A' 56 sees the aircraft 100, the reflected image of the sky 52 is visible and thus transparent. It is to let go. The transparency effect of the present invention is largely exhibited when the image of the sky that is the background of the vehicle 100 and the image of the sky reflected by the vehicle 100 are very similar. Referring to the drawings, the sky image 53, which is the background of the aircraft 100, visible to the observer 56 is a cloud 55, and the sky image 52 reflected by the aircraft 100 is also a cloud. If (54) is worn, the observer 56 can see the image of the sky and the continuous sky as the background when viewing the aircraft 100 is maximized the transparency effect. In addition to the continuity of the shape of the sky, the transparency effect is greater when the background sky and the reflected sky have a small difference in brightness caused by sunlight.

FIG. 6 is a diagram illustrating the principle of a virtual transparent flying vehicle applied to an observer at a specific position in accordance with a preferred embodiment of the present invention. When looking at the angle of the eye and the angle of the plane, such as the angle of the 'V' shape of the aircraft, such as when a certain condition meets a large effect, the operation principle is as described below.

The aircraft 100 has a 'V' shape 617 in the lower part from the nose to the tail of the fuselage 10 and is coated with a material that reflects light to give an optically transparent effect, making it invisible to the observer. In this figure, the shape of the aircraft 100 is seen from the front, and only the shape of the fuselage 10 is shown for convenience.

The angle at which the observer 602 at the point 'A' above the ground 601 looks up at the flying vehicle 100 in flight and the direction 604 of the line of sight to the ground 601 is referred to as b ° (603). The angle formed by the straight line 605 perpendicular to 601 and the centerline 607 of the vehicle 100, that is, the angle formed by the vehicle 100 by the turning flight or the like, is referred to as a ° 608. In addition, the angle of the 'V' shape of the 'V' shaped vehicle 100 is referred to as 2k ° (606). At this time, the angle formed by the normal line 611 perpendicular to one surface 609 of the vehicle and the observer's line of sight 604 forms a b- (a + k) ° 612, and the reflection angle 613 is an incident angle 612. ), And forms an angle between the normal 611 and b- (a + k) ° (613).

In this case, the observer 602 must have a direction 614 that is reflected from the V-shaped surface 609 of the fuselage 10 of the vehicle 100 upwards than the direction parallel to the ground 601. The sky reflected on the surface 609 of the vehicle 100 is visible, and thus, the effect of making the vehicle invisible appears. If the direction 614 at which the line of sight 604 is reflected at the surface 609 of the vehicle 100 is directed downward than the direction parallel to the ground 601, the surface 601 at the surface 609 of the vehicle 100 is oriented. The appearance of is reflected so that the effect of the aircraft 100 is transparent in the field of view of the observer 602 does not appear.

That is, the angle 612, 613, which is the angle 615 formed by the surface 609 of the vehicle 100 and the angle of view 604, plus the angle formed by the line of sight 604 and the reflection direction 614, is the aircraft 100. Surface 609 should be greater than bottom angle 616 with ground 601. If you express it as a formula,

{90 ° + (a + k) -b} + {b- (a + k)} + {b- (a + k)} ≥ {90 ° + (a + k)}

from,

b ≥ 2 (a + k) or b-2a ≥ 2k

Is derived. That is, only when the condition of Equation 2 is satisfied, the flying object 100 appears to be transparent. For example, when there is no inclination during flight of the vehicle 100 (a = 0), if the angle of the vehicle 100 V-shape is 20 ° (2k = 20 °), the observer 602 gaze 604 If the angle b (603) formed with the ground is 20 ° or more, the aircraft will appear transparent and disappear from the observer's field of view (602). When the observer looks up at the line of sight forming a specific angle b with the ground, the smaller the angle of the V-shape of the vehicle 100, that is, the smaller the 2k value, the easier it is to satisfy the above equation (2). This is because the smaller the value of 2k, the larger the angle of inclination from the line 100 perpendicular to the ground due to the a value, that is, the turning flight or the like. However, since the aircraft 100 includes various devices such as an engine and a cockpit, it is not only possible to reduce the angle of the V-shape indefinitely to accommodate this, so the 2k value is about 10 to 30 degrees, more preferably 15 degrees. It is desirable to be between 25 and 25 degrees.

On the other hand, parts other than the V-shaped surface 609 of the body 10, for example, the upper part of the body 10, etc., scatter the incident wave such as radar in another direction without returning, that is, stealth ) Structure so that it is not captured by the radar network.

FIG. 7 is a view for explaining the principle of a virtual transparent flying vehicle applied to an observer at a position different from that of FIG. 6, and the angle at which the flying vehicle forms a vertical line on the ground by a turning flight, etc. When the direction of the direction and the angle of the plane, such as the angle of the 'V' shape of the aircraft meets a certain condition has a great effect, the operation principle is as described below.

The angle at which the direction 704 of the line of sight viewed from the observer 'B' 702 in a position further to the right than the observer 'A' 602 in FIG. The b ° 703 is smaller than the angle 603 of the direction 604 of the line of sight 604 of the 'A' 602 of FIG. 6 looking up the vehicle 100. In this case, since the angle 2k value of the V-shape of the flying vehicle 100 is constant while the b value becomes small, the inequality of Equation 2 may not be satisfied. As a result, the direction 713 reflected from the surface 709 of the vehicle 100 meets the ground 701, so that the ground is reflected from the vehicle 100, and thus the effect of the transparent appearance disappears. Therefore, in order to satisfy the inequality of Equation 2, the angle of inclination of the aircraft 100 from the line 705 perpendicular to the ground 701 must be reduced by the value a, that is, the turning flight. Referring to the drawings, for this purpose, it can be seen that the angle a 708 formed by the flying vehicle 100 with the line 705 perpendicular to the ground 701 by turning flight or the like is smaller than the case 608 of FIG. 6. In this way, the viewer's gaze 704 is reflected from the surface 709 of the vehicle 100, the direction 713 is reflected above the line parallel to the ground 701, the sky is reflected back to the viewer, so the effect that looks transparent again To me.

To this end, if the vehicle 100 is a manned aircraft piloted by a pilot, when the pilot finds the observer 702 on the ground, the aircraft 100 is placed close to the line 705 perpendicular to the ground 701. You can fly. In the case of an unmanned aerial vehicle without a pilot, an angle 703 may be measured when an observer is detected, and the flying angle a 708 may be controlled to fly automatically so as to satisfy the inequality of Equation 2 above. . In the case of an unmanned aerial vehicle, the detector includes a detection device capable of detecting the observer 702 and the observation angle 703 on the ground, or the central control unit detects the observer 702 and the observation angle 703 so as to detect the flight angle of the aircraft. ) Can also be controlled. Of course, even in the case of a manned aircraft, it may include a sensing device capable of detecting the observer 702 and the observation angle 703 on the ground to provide the detected information to the pilot, or to automatically control the flight angle 708 of the vehicle. have.

FIG. 8 is a view showing a surface structure of a vehicle according to the present invention that not only has an optical transparency effect but also is not detected by radio waves. Although this has been briefly described with reference to FIG. 2, it will be described below in more detail with reference to this drawing.

In FIG. 810, the light 81 reflected to the observer through the surface of the vehicle 100 and the electromagnetic wave 82 penetrating into the surface of the vehicle 100 are illustrated.

Figure 820 below shows the surface 11 structure of the vehicle 100. Light 81 is reflected through the light reflector 12 on the surface, and the electromagnetic wave 82 is absorbed by the radio wave absorber 13 inside the light reflector 12. The electromagnetic wave absorber 13 is made of a metal material, and the electromagnetic wave is absorbed up to an equivalent skin depth 84 according to the characteristics of the metal material forming the electromagnetic wave absorber 13, and the reflection is prevented by the radar network. This prevents the vehicle 100 from being captured. It is preferable that the thickness of this light reflection plate 12 is 1 micrometer or less, and the thickness of the radio wave absorber 13 is 5 cm or less.

9 is a view showing an experimental photograph by a model of a virtual transparent flying vehicle.

The left picture 910 is a picture of the model aircraft 150 and the sky obliquely below the model vehicle 150, and the sky image is reflected on the one surface 151 of the 'V' shape of the model vehicle 150 to be transparent. The view is shown. The right picture 920 is a picture of the model vehicle 150 and the sky vertically from the lower part of the model vehicle 150, and the sky image is reflected on both surfaces 151 and 152 of the 'V' shape of the model vehicle 150. The figure looks transparent.

10 is a diagram illustrating a virtual transparent flying vehicle 200 according to another embodiment of the present invention.

The virtual transparent flying vehicle 200 of this figure has the form of the mechanism inside which is filled with gas lighter than air. As in the case of the transparent aircraft 100 of FIG. 1, the aircraft 100 has a 'V' shape 21 at its lower portion unlike a balloon shape of a conventional hot air balloon in order to reflect the sky to a viewer on the ground. The surface is made of a material that reflects light.

The virtual transparent vehicle 200 of the figure may include a heater that heats the gas so that the aircraft 200 floats in the air as an altitude control device, or may include a propeller for floating in the air, or a jet engine. You can also get buoyancy by using.

It may include a load body connected to the lower end to the vehicle 200 to apply a load to balance the aircraft 200. Such a load body may be connected to the lower portion of the outside of the vehicle 200 through a string or the like, and more preferably, may be positioned below the inside of the vehicle 200. In addition, without such a load body, it may be to control the angle of the vehicle 200, including a gyro wheel.

In addition, the aircraft 200 may be provided with a manned control device to be controlled by the pilot's seat and the pilot, it may be provided with an unmanned control device when the aircraft 200 is composed of an unmanned aircraft.

As described with respect to the case of the plane-shaped virtual transparent aircraft 100 with reference to FIG. 1, the virtual transparent aircraft 200 of this figure also, the angle of the 'V' shape at the bottom is 10 to 30 degrees, more preferably Preferably it is 15 to 25 degrees. In addition, the inside of the surface of the vehicle 200 is preferably made of a material capable of absorbing electromagnetic waves so as not to be captured by the radar, as described above with reference to FIG.

11 is a view showing a flight path design method for maximizing the transparency effect of the vehicle.

If the flight paths of the vehicles 100 and 200 are designed to face the solar direction 1101, when the reflected image 1102 of the sky and the image 1103 of the background sky are symmetrical, the observer ( Even if 1104 is present, when the angles of the V-shaped reflectors 11 and 21 of the vehicles 100 and 200 are very small, the luminance of the reflected image and the background image may be similar to maximize the transparent effect.

That is, when the aircraft (100, 200) is described in terms of how to control its own flight path during the flight, the first step of the aircraft 100, 200 in flight to detect the direction of the current incident light 1105, As described above, the flight path is controlled by controlling the flight path in a direction parallel to the sensed solar incident light 1105 to maximize the transparency effect to the observer.

In addition, when it is described in terms of how to design the flight path of the aircraft (100, 200), (a) receiving information about the destination information and the estimated time of arrival, (b) the sun at each point between the current location and the destination Determining a direction of incident light, (c) setting a temporary flight path such that the virtual transparent flying bodies 100 and 200 move in a direction parallel to the determined direction of solar incident light, and (d) relating to the estimated arrival time Estimating the time of arrival at each point on the temporary flight path set in step (c) based on the information; and (e) taking into account the direction of solar incident light at that point of time estimated in step (d). The flight path is designed by modifying the temporary flight path to determine the actual flight path.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood that various modifications and changes may be made without departing from the scope of the appended claims.

1 is a perspective view of a virtual transparent flying vehicle according to a preferred embodiment of the present invention.

2 is a front view of a virtual transparent flying vehicle according to a preferred embodiment of the present invention.

3 is a view from above of a virtual transparent vehicle in accordance with a preferred embodiment of the present invention.

4 is a view from below of a virtual transparent flying vehicle according to a preferred embodiment of the present invention;

5 is a view for explaining the principle of operation of the transparent vehicle of the present invention.

6 illustrates the principle of a virtual transparent vehicle applied to an observer at a particular location, in accordance with a preferred embodiment of the present invention.

FIG. 7 illustrates the principle of a virtual transparent flying vehicle applied to an observer at a different position than in the case of FIG.

FIG. 8 is a view showing a surface structure of a vehicle according to the present invention, which not only has an optical transparency effect but also is not detected by radio waves.

9 is a view showing an experimental photograph by a model of a virtual transparent flying vehicle.

10 illustrates a virtual transparent flying vehicle according to another embodiment of the present invention.

11 is a view showing a flight path design method to maximize the transparency effect of the vehicle.

Claims (13)

The material reflects light to make it look transparent, but the air condition around the aircraft, the angle that the aircraft makes with the vertical line of the ground by turning, etc., the angle where the observer looks up to the aircraft in flight, When a certain element including the angle of the 'V' shape of the aircraft satisfies a certain condition, the aircraft exhibits a transparent effect. A lower body from the front end to the rear end of the body having a 'V' shape, and a surface of the body made of a material that reflects light; A propulsion device coupled to the fuselage to propel a vehicle; A wing of transparent material coupled to the body to impart lift to the body; And A control device for controlling the vehicle Including, In order to exhibit the effect that the aircraft looks transparent b-2a ≥ 2k Lt; / RTI > B is an angle formed by the observer at a specific point of view looking up at the aircraft in flight from the ground, A is an angle formed by a straight line perpendicular to the ground and a centerline of the vehicle, The 2k is the angle of the 'V' shape of the vehicle 100 of the 'V' shape, The propulsion device, One or more of a propeller, a jet engine, and a rocket engine, The jet engine and the rocket engine are included in the fuselage having a 'V' shaped transparency effect, The housing surrounding the propeller is a 'V' shape and the surface is a material that reflects light Virtual transparent aircraft, characterized in that. delete The method according to claim 1, The control unit, With manned or unmanned control Virtual transparent aircraft, characterized in that. The method according to claim 1, The angle of the 'V' shape of the lower part of the fuselage is 10 to 30 degrees Virtual transparent aircraft, characterized in that. The method according to claim 1, Inside the fuselage surface, Composed of a material capable of absorbing electromagnetic waves so as not to be captured by radar Virtual transparent aircraft, characterized in that. The method of claim 5, Surfaces other than the 'V' shaped surface of the body, Having a stealth structure for scattering incident electromagnetic waves in directions other than the incident direction Virtual transparent aircraft, characterized in that. The method according to claim 1, The propeller, Composed of transparent material Virtual transparent aircraft, characterized in that. The method according to claim 1, The control unit, If an observer on the ground is detected during the flight, controlling the observer to change or maintain the up and down axis of the fuselage at a specific angle so that the ground is not reflected through the fuselage surface; Virtual transparent aircraft, characterized in that. The material reflects light to make it look transparent, but the air condition around the aircraft, the angle that the aircraft makes with the vertical line of the ground by turning, etc., the angle where the observer looks up to the aircraft in flight, When a certain element including the angle of the 'V' shape of the aircraft satisfies a certain condition, the aircraft exhibits a transparent effect. The lower portion is a 'V' shape, the surface is composed of a material that reflects light, the inside is filled with a gas lighter than air; And Altitude control device to adjust the height of the aircraft Including, In order to exhibit the effect that the aircraft looks transparent b-2a ≥ 2k Lt; / RTI > B is an angle formed by the observer at a specific point of view looking up at the aircraft in flight from the ground, A is an angle formed by a straight line perpendicular to the ground and a centerline of the vehicle, The 2k is the angle of the 'V' shape of the 'V' shaped vehicle 100 Virtual transparent aircraft, characterized in that. The method of claim 9, The angle of the 'V' shape of the lower portion of the float is 10 to 30 degrees Virtual transparent aircraft, characterized in that. The method of claim 9, Inside the surface of the float, Composed of a material capable of absorbing electromagnetic waves so as not to be captured by radar Virtual transparent aircraft, characterized in that. The method of claim 11, Surfaces other than the 'V' shaped surface of the floating body, Having a stealth structure for scattering incident electromagnetic waves in directions other than the incident direction Virtual transparent aircraft, characterized in that. A method for controlling a flight path of a virtual transparent vehicle of claim 1 or 9, (a) detecting the direction of solar incident light during flight; And (b) controlling the flight path in parallel with the sensed solar incident light so as to maximize the transparency effect to the observer; Flight path control method of a virtual transparent flying vehicle comprising a.

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