Wind tunnel with a flight chamber suitable for human jumping

Abstract

The object of the invention is a wind tunnel with a flight chamber (1) suitable for human jumping, in particular for training ski jumping or wingsuit jumping. The wind tunnel contains at least a flight chamber (1) suitable for human jumping and for airflow (F) inducing a lift force. In the flight chamber (1) at least a bottom wall (2), and an upper wall (3) can be distinguished and wherein the bottom wall (2) being the floor of the flight chamber (1). The invention is characterized in that the flight chamber (1) comprises a conveyor belt (4), which is at least in part a movable floor surface of the flight chamber, at least on a portion of the bottom wall (2).

Description

[0001] Wind tunnel with a flight chamber suitable for human jumping

[0002] The object of the invention is a wind tunnel with a flight chamber suitable for human jumping in an airstream, in particular for ski jumps and wingsuit flights. The invention is used for recreational and sports purposes to simulate ski jumps and wingsuit glides. The intended use of the invention also includes trainings which prepare for and improve the skills of ski jumping and wingsuit gliding.

[0003] In the state of the art, there are wind tunnels suitable for human jumping and flying in an airstream. The airflow in these types of tunnels is indispensable for exercises and is intended to create conditions as close to natural as possible, ensuring the required airflow velocity, the absence of turbulence, and the creation of the necessary real angles of attack of the airflow in relation to the person in the airflow.

[0004] For example, WO2021133198A1 reveals this type of a wind tunnel with a flight chamber suitable for human jumping. There is a closed airflow in the wind tunnel, which includes a fan assembly, contraction, flight chamber, diffuser, air return duct, and multiple curved air channels. These parts combine to form a wind tunnel system. The wind tunnel contains a flight chamber which is equipped with at least one curvilinear section having a contour with a curvilinear trajectory described by a segment of an Euler spiral. Such shape of the flight chamber ensures continuity of shape with a minimum rate of change in curvature for a given length, and with a minimum rate of increase in centrifugal force at a constant velocity along the generated airflow curve. This ensures uniformity of airflow in the curvilinear flight chamber, as well as a reduction in hydraulic losses. In addition, the flight chamber can be divided into sections, and the different sections can have different curvature characteristics. In particular, the flight chamber may have two sections, with the first section being made with a curved trajectory profile described by a section of the negative branch of the Euler spiral, and the second section being made with a curved trajectory profile described by a section of the positive branch of the Euler spiral. This type of flight chamber is preferred for training both ski jumpers and wingsuit jumpers.

[0005] WO2018015766A1 also reveals a wind tunnel with a flight chamber suitable for human flying. In this solution, the wind tunnel has a flight chamber that is inclined relative to the vertical and, in particular, can be inclined in the vertical plane to form a curve that is a smooth transition from an approximately horizontal shape to an approximately vertical shape. The curve-shaped flight chamber allows the flyer to select the angle or angles at which they wish to fly, as well as to gradually pass between the horizontal and vertical parts of the flight chamber. In other embodiments, the flight chamber may be divided into sections in such a way that the section of the flight chamber where the air enters the flight chamber is either approximately horizontal, or angled between 0° and 45° relative to the horizontal, while the last section of the flight chamber where the air leaves the flight chamber is either approximately vertical, or angled between 0° and 45° relative to the horizontal. Unlike in case of vertical flight chambers suitable for simulating parachute jumping, such a shape of the flight chamber allows, among other things, wingsuit gliding, during which there is considerable forward movement in fast-moving air. A flight chamber of such shape allows practising movements with a significant horizontal component directed both forwards and backwards.

[0006] EP3417261B1, on the other hand, discloses a wind tunnel for stable, sustained human flying for research or recreational purposes. The wind tunnel comprises a tunnel with the first part having a first central axis, and a second part having a second central axis, the second part being a flight chamber enabling the flyer to achieve sustained gliding flight therein. The first and second central axes of the wind tunnel are angled towards each other, with the second central axis also inclined between 15° and 60° relative to the horizontal plane. The wind tunnel also has at least one fan to generate airflow in the second part of the tunnel - the flight chamber. In addition, the second section of the tunnel can have an increasing cross-section over at least part of its length, and the angle between the first central axis and the second central axis can be adjusted. The wind tunnel may also have a means of recirculation to re-circulate the air in the tunnel, incorporating a duct connecting the lower end of the second section to the upper end of the first section. The use of an inclined or oblique wind tunnel provides an airflow in which the air streams flow obliquely upwards, relative to the horizontal plane defined as perpendicular to the direction of gravitational acceleration, thus enabling proper, free, sustained gliding flight of objects or people. On the other hand, EP3824978B1 discloses a ski jumping and wingsuit free-flight simulator. This simulator has two side tunnels parallel to each other, that is the first horizontal tunnel and the second horizontal tunnel. There is a drive unit in each of these tunnels. The drive units located in the first horizontal tunnel and in the second horizontal tunnel force two separate airflows. Between the first horizontal tunnel and the second horizontal tunnel, there is a diagonal tunnel containing the flight chamber. The first horizontal tunnel, the second horizontal tunnel, and the lower part of the diagonal tunnel are connected by a tunnel transverse to them, which is a contraction containing at least one flow guide. The first horizontal tunnel and the second horizontal tunnel are also connected by a second transverse tunnel at the opposite end to the contraction. The ski jumping simulator also has a vertical tunnel connecting the top of the diagonal tunnel with a second transverse tunnel which connects the first horizontal tunnel and the second horizontal tunnel. Airflows within the flight simulator are regulated by varying the rotational speed of the power units. The drive units force two separate airflows, that is, respectively: the first airflow in the first horizontal tunnel and the second airflow in the second horizontal tunnel. The airflows merge in the contraction area, inducing a lift force in the diagonal tunnel. The diagonal tunnel has a floor, part of which is a movable, oscillatorily tilting platform that is the entrance and exit of the simulator. The platform is essential to the functioning of the tunnel and there is a threshold fixed at the top of it, the position of which is always horizontal. The threshold is where the jumper stands after entering the open platform. Standing on the threshold, the jumper moves upwards with the platform closing oscillatorily. When the platform is closed and therefore forms a part of the floor, the jumper can jump off the threshold towards the lower part of the diagonal tunnel connected to the contraction. The already combined airflows from the first horizontal tunnel and the second horizontal tunnel, which flow in a diagonal tunnel from the bottom upwards, induce a lift force. The jumper can now take flight for any length of time. To complete the flight, the platform is opened gradually, causing the airflow to decrease, which then forces the jumper to land on the open platform.

[0007] The aim of the invention is to develop a flight chamber in a wind tunnel that will allow the most realistic reproduction of a jump that is performed in a stream of flowing air, simulating ski jumps on a ski jumping hill and wingsuit jumps performed outdoors's. A further aim of the invention is to adapt the flight chamber for beginners, while still being able to carry out the flights of advanced flyers, for example by varying wind speed or direction.

[0008] The invention relates to a wind tunnel with a flight chamber suitable for human jumping which comprises at least a flight chamber suitable for human jumping and for airflow inducing a lift force. In the flight chamber at least a bottom wall and an upper wall can be distinguished, with the bottom wall being the floor of the flight chamber. The essence of the invention is that the flight chamber comprises a conveyor belt which is at least in part a movable floor surface of the flight chamber, at least on a part of the bottom wall.

[0009] It is advantageous if the length of the conveyor belt is at least 0.5 m.

[0010] It is preferable when it is possible in the flight chamber to separate at least a start-of-fl ight section and an end-of-flight section, as well as a flight phase section of at least 2.0 m in length which is located between the start-of-flight section and the end-of-flight section..

[0011] It is reasonable if the conveyor belt is a movable floor surface of the start-of-flight section.

[0012] It is appropriate that the conveyor belt is fixed below the floor surface, with at least one longitudinal slot in the floor surface through which the conveyor belt can be accessed, so that it constitutes a movable floor surface in the slot's area.

[0013] In such case, it is particularly good if there are two slots in the floor surface that are parallel to each other and form tracks that allow to begin a flight.

[0014] It is also advisable that the flight chamber in the longitudinal section has a centreline drawn between two lines lying on the bottom wall and the top wall of the flight chamber, inclined at an angle of between 25° and 55° relative to the horizontal line.

[0015] It is then advantageous if the centrelines of the start-of-flight section, the flight phase section, and the end-of-flight section, separated in the flight chamber, are inclined at different angles relative to the horizontal line.

[0016] It is good if the centreline of each section of the flight chamber is a straight-line segment.

[0017] It is reasonable that the centreline of the start-of-flight section is inclined at an angle ranging from between -10° and 15° relative to the horizontal line, the centreline of the flight phase section is inclined at an angle ranging from 25° to 55° relative to the horizontal line, and the centreline of the end-of-flight section is inclined at an angle ranging from -10° to 20° relative to the horizontal line.

[0018] It is appropriate if the length of the conveyor belt is equal to the length of the start-of- flight, flight phase, or end-of-flight section.

[0019] It is also advisable that the flight chamber in the longitudinal section has a centreline drawn between two lines on the bottom wall and the top wall of the flight chamber and having the shape of a curved line with a curvature varying arbitrarily along the length of the curve.

[0020] It is particularly good if the floor surface, and in particular the end-of-flight or flight phase section, has a layer made of textile sliding mat of artificial snow type which is suitable for skiing and, in particular, for ending the flight by landing.

[0021] In this description, the centreline is understood to be a line which is drawn between any two freely arranged lines and is formed solely of points dividing the distance between these lines into two equal parts. Thus, line determined in this way can be the symmetry axis of the component. This understanding is in accordance with the nomenclature adopted in computer-aided design tools, and it is also in line with dictionary definitions of the word "centreline", which define it as a real or theoretical line that is at an equal distance from the surfaces or sides.

[0022] The primary advantage of the invention arises from the use of a conveyor belt, which is at least in part a movable surface of the flight chamber floor. In such case, the floor of the flight chamber consists of a moving belt which is appropriately taut and is stretched between two drums, at least one of which is a drive drum. Used construction of conveyor belt is known in the state of the art. A special type of a conveyor belt that can be used as a flight chamber floor is the sports and / or rehabilitation treadmill. The person training in the flight chamber starts the activity by stepping on the conveyor belt. The conveyor belt, through the continuous movement of the endless belt, changes the relative speed of the person training in the flight chamber in relation to the speed of the airstream. Thus, the conveyor belt can not only reduce, but also increase the relative speed of the person training in the flight chamber. When increasing the speed of the person training in the flight chamber, relative speeds that are not possible with airflow alone can be achieved. Furthermore, no known solutions for flight chambers in oblique wind tunnels so far allowed a realistic and close-to-factual placement of a ski jumper in an airstream in a flight chamber in a way that reproduces the conditions accompanying training on a ski jumping hill. In particular, this is made possible by the conveyor belt, which is located especially in the start-of-flight section of the flight chamber. Thus, in the case of ski jumping training, the jumper's leaving the threshold on the hill is imitated, and in the case of beginners, the conveyor belt can move the jumper to the next part of the flight chamber, allowing training in a stream of flowing air, or even training based solely on the movement of the conveyor belt, without the stream of air in the flight chamber. On the other hand, a conveyor belt located in the flight phase section of the flight chamber may even allow for skiing training on the part of the ski jump corresponding to the inrun, as it is possible thanks to a suitable inclination of this part of the flight chamber relative to the horizontal line. Ideally, the length of the conveyor belt should be equal to the length of the selected part of the flight chamber, in particular the start-of-flight section. The greater the length of the conveyor belt used, the more realistic conditions can be achieved. The end of the conveyor belt, which corresponds to the end of the start-of-flight section, realistically reproduces the exit zone from the take-off on the ski jump.

[0023] The placement of the conveyor belt below the floor surface and the creation of a slot in the floor surface through which the conveyor belt is accessed is particularly important for imitating the exit from the take-off on the ski jump, and for reflecting the real conditions on the ski jump. This solution makes it possible to imitate not only the exit of the take-off, but also the inrun phase in which the jumper gains speed, which can also be simulated by increasing the speed of the conveyor belt. On the other hand, by making two slots oriented parallel to each other, an inrun track reflecting the conditions of a ski jumping hill is created.

[0024] Thanks to two alternative solutions, i.e. the construction of an oblique flight chamber with a centreline inclined from 25° to 55° relative to the horizontal line, or the construction of a flight chamber with a centreline having the shape of a curve line, with an increase in relative speed, jumps and flights, both on a ski jumping hill and those in wingsuits, are authentically reproduced. In particular, this is possible when the centrelines of the flight chamber's separated start-of-flight, flight phase, and end-of-flight sections are inclined at different angles to the horizontal line. In the case of ski jumping, such sections of the flight chamber make it possible to reproduce the inrun, flight and landing zone of a jumper on a standard ski jump hill. In particular, the start-of-flight section inclined at an angle of between -10° and 15° relative to the horizontal line reproduces the take-offs of ski jumps with typical inclinations at an angle of between 10° and 11°, and the end-of-flight section inclined at an angle of between -10° and 20° relative to the horizontal line reproduces the landing on a part of the ski jump with a smaller angle of inclination. In contrast, when it comes to wingsuit flying, such parts of the flight chamber can be used to reproduce natural terrain diffraction. In the case of a flight chamber that has got a centreline shaped like a curve line, all transitions and diffraction are smoother. Jumping and flying, i.e. exercises in the flight chamber, take place in conditions as close to natural as possible, and the state- of-the-art control of the speed and direction of the airflow allows the person training to learn how the body works in case of changes in atmospheric conditions, at different stages of flight, and thus enables better preparation for jumping or flying in natural conditions. What's more, training involving different tasks can take place in sections of the flight chamber with different inclinations, depending on the needs of the people training.

[0025] The flight chamber makes it possible to safely perform jumps and flights that simulate their performance under natural conditions even more closely if images or films depicting the ski jump or the natural landscapes and terrain are projected during the jump or flight.

[0026] Yet another advantage, allowing the simulation of jumps and flights, in particular ski jumping, to become even more realistic, is to cover the floor surface in the end-of-flight or the flight phase section with a layer made of textile sliding mat of artificial snow type, offering the possibility of landing and skiing. Thanks to such a solution, and in particular in combination with the use of a conveyor belt in the start-of-flight section, it is possible to reproduce the jumper's inrun and flight start, as well as the landing, according to actual conditions. The use of a textile sliding mat of artificial snow type allows a typical landing to be performed; however, it is still performed on a textile sliding mat of artificial snow type. The use of a textile sliding mat of artificial snow type eliminates the significant wetting of the material with water, which is necessary with other materials of this type. An example of such material is plastic matting which is not suitable for use in wind tunnels containing a flight chamber, as it requires water to be poured over it, which is necessary to achieve the effect of sliding over the surface. However, such a solution would cause significant amounts of water, which is lifted by the airstream, to begin circulating in the wind tunnel and the flight chamber.

[0027] The invention is presented in embodiments and in the drawing, in which fig. 1-5 show a flight chamber of the wind tunnel which is suitable for human jumping in a schematic longitudinal cross-section in successive embodiments.

[0028] First embodiment

[0029] The flight chamber 1 (fig. 1) of the wind tunnel is designed for human jumping and for the airflow that induces a lift force. For this purpose, it has appropriate safety measures and equipment, as well as is equipped, among other things, with a fan unit that generates the airflow to induce the lift force needed for jumping in the flight chamber 1. In the flight chamber 1, there is an airflow F which is induced during training, and which generates the lift force, while also being the factor that allows flying in a wingsuit and performing ski jumping in a suitable suit. The airflow F induces the lift force similar to the force which lifts the jumper during classic ski jumping under natural conditions on a ski jumping hill, and similarly simulates the lift force to which the jumper is subjected during wingsuit free- flight.

[0030] In the flight chamber 1 a bottom wall 2 and a top wall 3 can be distinguished, with the lower wall 2 being the floor of the flight chamber. Naturally, the flight chamber 1, which is a kind of wind tunnel, is also limited by side walls. The cross-sectional shape of the flight chamber 1 can essentially be any shape, such as circular, elliptical or rectangular. In the flight chamber, a start-of-flight section C, an end-of-flight section A, and a flight phase section B which has a length of at least 2.0 m and is located between the start-of-flight section C and the end-of-flight section A may be separated.

[0031] In a longitudinal section through the flight chamber 1 and through each section of it, centrelines CLA, CLB, CLC can be drawn between the two lines lying on the bottom wall 2 and the top wall 3 of the flight chamber l. The centrelines CLA, CLB, CLc are inclined relative to the horizontal line P at an angle of between 25° and 55°. Each of the centrelines CLA, CLB, CLC of the start-of-flight section C, the flight phase section B, and the end-of-flight section A which are separated in the flight chamber 1 is a straight-line segment which is inclined at a different angle relative to the horizontal line P. The start-of-flight section C is inclined at an angle y ranging from -10° to 15°, being 15° in the embodiment relative to the horizontal line. The flight phase section B is inclined at an angle ranging from 25° to 55°, being 36° in the embodiment relative to the horizontal line. The end-of-flight section A is inclined at an angle a ranging from -10° to 20°, being 16° in the embodiment relative to the horizontal line. In the embodiment, the separation of the start-of-flight section C, the flight phase section B, and the end-of-flight section A is achieved by constructing the flight chamber 1 with three sections in which the centrelines CLA, CLB, CLC which are inclined at different angles relative to the horizontal line P. In other embodiments, the individual sections of the flight chamber 1 may be separated by other means, for example by means allowing the velocity of the airflow in the individual sections of the flight chamber to be varied.

[0032] A conveyor belt 4 has been fixed to the bottom wall 2 of the start-of-flight section C, so that it is the moving floor surface of the start-of-flight section C. The length of the conveyor belt 4 is therefore equal to the length of the start-of-flight section C.

[0033] On the other hand, the bottom wall 2 of the end-of-flight section A and the flight phase section B, and therefore the floor of these sections of the flight chamber, has a layer 2A made of textile sliding mat of artificial snow type. It is a textile mat suitable for skiing and, in particular, for ending the flight by landing. Such textile mats do not require wetting for skiing and are known in the state of the art, for example, from patent descriptions EP3063333B1 "Textile run and use thereof", and EP4031713A1 "Textile sliding surface for skiing and sledding applications." The layer 2A made of a textile sliding mate of artificial snowy type located in the end-of-flight section A and the flight phase section B allows landing at any stage of the training after jumping off the conveyor belt 4 located in the start-of-flight section C.

[0034] Second embodiment

[0035] The flight chamber 1 (fig. 2) of the wind tunnel in its second embodiment has a structure corresponding to the first embodiment, with the difference that the conveyor belt 4 has been attached to the bottom wall 2 of the start-of-flight section C. The conveyor belt 4 has been mounted under the surface which is the floor of the flight chamber. There are two slots in the floor surface, which are oriented parallel to each other and through which the conveyor belt is accessed, so that the conveyor belt constitutes a movable floor surface in these slots' area. Thus, the slots form the equivalent of inrun tracks on a ski jump, allowing training of jumping off from the take-off and, under the conditions in the flight chamber 1, the efficient placement of the person training in the airstream. The width of the slots in the floor corresponds to the width of the skis or is slightly, about 10%, wider than them. There are such embodiments in which there is a single slot in the floor to allow, for example, a person in a wingsuit to increase their speed before jumping.

[0036] In addition, the conveyor belt 4 has been attached to the bottom wall 2 of the flight phase section B, which allows the body position to be trained while the person is on the conveyor belt, even without any airflow in the flight chamber 1.

[0037] In contrast, the remaining part of the flight phase section B and the bottom wall 2 of the end-of-flight section A has a layer 2A made of textile sliding mat of artificial snow type.

[0038] In this embodiment, the start-of-flight section C is inclined at an angle y equal to 15° relative to the horizontal line, the flight phase section B is inclined at an angle equal to 35° relative to the horizontal line, and the end-of-flight section A is inclined at an angle a equal to 15° relative to the horizontal line.

[0039] Third embodiment

[0040] The flight chamber 1 fig. 3 of the wind tunnel is designed for human jumping and for the airflow that induces a lift force. In the flight chamber 1 a bottom wall 2 and a top wall 3 can be distinguished, with the lower wall 2 being the floor of the flight chamber. In this embodiment, the flight chamber has the form of a tunnel, the centreline CL of which is inclined at a constant angle relative to the horizontal line P. In the start-of-flight section C, a conveyor belt 4, which is in part a movable surface of the floor of the flight chamber 1, is mounted on the bottom wall 2 of the flight chamber 1. The conveyor belt 4 enables the person training to be efficiently placed in the airstream. In such an embodiment, the floor of the section of the flight chamber 1 in which the landing of the person training is to take place may have a layer made of textile sliding mat of artificial snow type. In this embodiment, the start-of-flight section C and the end-of-flight A are horizontal. The flight phase section B is inclined at an angle p equal to 35° relative to the horizontal line.

[0041] Further embodiments

[0042] In the following embodiments, the flight chamber 1 of the wind tunnel as in the second embodiment has a structure corresponding to that of the first embodiment, with the difference that the conveyor belt 4 has been fixed only on the bottom wall 2 of the start- of-flight section C. In these embodiments, layers of textile sliding mat of artificial snow type were used in the flight phase section B, and in the end-of-flight section A. However, the use of this layer is not essential and can be determined by the needs and conditions necessary for the people training. Each of the centrelines CLA, CLB, CLC of the start-of-flight section C, the flight phase section B, and the end-of-flight section A separated in the flight chamber 1 is a straight line that is inclined at a different angle relative to the horizontal line P. The embodiments illustrate the different possibilities for selecting the inclination of these sections and adapting them to real conditions.

[0043] In the fourth embodiment (fig. 4), the start-of-flight section C is inclined at an angle y equal to 15° relative to the horizontal line, the flight phase section B is inclined at an angle equal to 35° relative to the horizontal line, and the end-of-flight section A is inclined at an angle a equal to -10° relative to the horizontal line.

[0044] In the fifth embodiment (fig. 5), the start-of-flight section C is inclined at an angle y equal to -10° relative to the horizontal line, the flight phase section B is inclined at an angle p equal to 35° relative to the horizontal line, and the end-of-flight section A is inclined at an angle a equal to 15° relative to the horizontal line.

[0045] In the subsequent embodiment (not shown in the figure), the flight chamber of the wind tunnel is designed for human jumping and for the airflow that induces a lift force. In the flight chamber a bottom wall and an upper wall can be distinguished, with the bottom wall being the floor of the flight chamber. In this embodiment, the flight chamber is in the form of a tunnel, the centreline of which is drawn between the two lines lying on the bottom wall and the top wall of the flight chamber and which is a straight-line segment inclined at an angle equal to 30° relative to the horizontal line. In this embodiment, the conveyor belt is placed on the bottom wall of the flight chamber in the section immediately preceding the section where the flight training in the airstream takes place. The conveyor belt enables the person training to be effectively placed in the airstream. The part of the bottom wall of the flight chamber intended for the end of training is covered with a layer made of textile sliding mat of artificial snow type. In a further embodiment (not shown in the figure), the flight chamber of the wind tunnel is designed for human jumping and for the airflow that induces a lift force. In the flight chamber a bottom wall and an upper wall can be distinguished, with the bottom wall being the floor of the flight chamber. In this embodiment, the flight chamber is in the form of a tunnel, the centreline of which is drawn between the two lines lying on the bottom wall and the top wall of the flight chamber and which has the shape of a curved line with an arbitrary curvature along the length of the arc and is a segment of the arc. In a special case, it can also be a curve that is a segment of an Euler spiral. In this embodiment, the conveyor belt is placed on the bottom wall of the flight chamber in the section immediately preceding the section where the airstream flight training takes place. The conveyor belt enables the person training to be effectively placed in the airstream. The part of the bottom wall of the flight chamber intended for the end of training is covered with a layer made of textile sliding mat of artificial snow type.

Claims

Claims1. A wind tunnel with a flight chamber suitable for human jumping, comprising at least a flight chamber (1) suitable for human jumping and for an airflow (F) inducing a lift force, wherein in the flight chamber (1) at least a bottom wall (2), and a top wall (3) can be distinguished, the bottom wall (2) being the floor of the flight chamber (1), characterised in that the flight chamber (1) comprises a conveyor belt (4), being at least in part a movable floor surface of the flight chamber (1), at least on a part of the bottom wall (2).

2. The wind tunnel with a flight chamber suitable for human jumping according to claim 1, characterised in that the length of the conveyor belt (4) is at least 0.5 m.

3. The wind tunnel with a flight chamber suitable for human jumping according to claim 1 or 2, characterised in that in the flight chamber (1) it is possible to separate at least a start-of-flight section (C) and an end-of-flight section (A), as well as a flight phase section (B) which is at least 2.0 m in length and which is located between the start-of-flight section (C), and the end-of-flight section (A).

4. The wind tunnel with a flight chamber suitable for human jumping according to claim 3, characterised in that the conveyor belt (4) is a movable floor surface of start-of-flight section (C).

5. The wind tunnel with a flight chamber suitable for human jumping according to claim 4, characterised in that the conveyor belt (4) is fixed below the floor surface, wherein there is at least one longitudinal slot in the floor surface through which the conveyor belt is accessed, so that the conveyor belt (4) constitutes a movable floor surface in the slot's area.

6. The wind tunnel with a flight chamber suitable for human flying according to claim 5, characterised in that there are two slots in the floor surface, which are oriented parallel to each other and which form tracks that allow to begin a flight.

7. The wind tunnel with a flight chamber suitable for human jumping according to any of the claims from 1 to 6, characterised in that the flight chamber (1) in a longitudinal section has a centreline (CL) drawn between two lines lying on the bottom wall and the top wall of the flight chamber, inclined at an angle from 25° to 55° relative to the horizontal line.

8. The wind tunnel with a flight chamber suitable for human jumping according to claim 7 , characterised in that the centre lines (CLA, CLB, CLC) of the start-of-flight section (C), the flight phase section (B), and the end-of-flight section (A), separated in the flight chamber (1), are inclined at different angles relative to the horizontal line (P).

9. The wind tunnel with a flight chamber suitable for human jumping according to claim 7 or 8, characterised in that the centreline (CLA, CLB, CLC) of each part of the flight chamber is a straight-line segment.

10. The wind tunnel with a flight chamber suitable for human jumping according to any of the claims from 8 to 9, characterised in that the centreline (CLc) of the start- of-flight section (C) is inclined at an angle (y) ranging from -10° to 15° relative to the horizontal line (P), the centreline (CLB) of the flight phase section (B) is inclined at an angle ( ) ranging from 25° to 55° relative to the horizontal line (P), and the centreline (CLA) of the end-of-flight section (A) is inclined at an angle (a) ranging from -10° to 20° relative to the horizontal line.

11. The wind tunnel with a flight chamber suitable for human jumping according to any of the claims from 8 to 10, characterised in that the length of the conveyor belt (4) is equal to the length of the start-of-flight section (C), or the flight phase section (B), or the end-of-flight section (A).

12. The wind tunnel with a flight chamber suitable for human jumping according to any of the claims from 1 to 6, characterised in that the flight chamber (1) in a longitudinal section has a centreline (CL) drawn between two lines lying on the bottom wall and the top wall of the flight chamber and having the shape of a curved line with a curvature varying arbitrarily along the length of the curve.

13. The wind tunnel with a flight chamber suitable for human jumping according to any of the claims from 3 to 13, characterised in that the surface of the floor, in particular the end-of-flight section (A) or the flight phase section (B), has a layer (2A) made of textile sliding mat of artificial snow type which is suitable for skiing and, in particular, for ending the flight by landing.

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