Flight device

Abstract

Provided is a flight device that, during flight, achieves a high level of stability, efficiency, and long-duration flight.　This flight device 10 has a vertical-flight rotor 11 and horizontal-flight rotors 12. The vertical-flight rotor 11 is rotated by a motor 13. The horizontal flight rotors 12 rotate by being connected to an engine 40 in a driving manner. Due to this configuration, the vertical-flight rotor 11 is rotated by the motor 13, and as a result thereof, the motor 13 can control the rotational speed of the vertical-flight rotor 11 with high accuracy during takeoff and landing. Furthermore, during horizontal flight, the engine 40 drives the horizontal-flight rotors 12 in a rotating manner, and as a result thereof, the horizontal-flight rotors 12 can be rotated with high efficiency and the continuous flight distance of the flight device 10 can be increased.

Description

flight equipment

[0001] The present invention relates to a flying device, and more particularly to a flying device that can fly along vertical and horizontal directions.

[0002] Conventionally, there have been known unmanned flying devices capable of flying in the air. Such flying devices are capable of flying in the air by using the thrust of a rotor that rotates around a vertical axis.

[0003] Possible fields of application for such flying devices include, for example, transportation, surveying, and photography. When a flying device is used in such fields, surveying equipment and photography equipment are attached to the flying device. By using the flying device in such fields, it is possible to fly the flying device in areas where humans cannot enter, and transport, photograph, and survey such areas. An invention related to such a flying device is described, for example, in Patent Document 1.

[0004] Furthermore, in order to achieve even longer distance flights, the flying device described in Patent Document 2 was developed. The flying device described in Patent Document 2 is called a parallel hybrid drone, and has a main rotor rotated by an engine and a sub-rotor rotated by a motor. The main rotor generates thrust to keep the flying device afloat in the air by rotating. The sub-rotor controls the position and attitude of the flying device in the air by rotating.

[0005] Meanwhile, a flying device known as a vertical take-off and landing aircraft has been developed. A vertical take-off and landing aircraft is called a VTOL (Vertical Take-Off and Landing). A VTOL can land and take off vertically by rotating its rotor around a vertical axis. Furthermore, a VTOL can fly horizontally by rotating its rotor around a horizontal axis. An example of an invention related to a VTOL is described in Patent Document 3 below.

[0006] JP 2012-51545 A JP 2021-020674 A JP 2013-32146 A

[0007] However, the inventions described in the above-mentioned patent documents etc. leave room for improvement in terms of achieving high levels of stability, efficiency and long flight times during flight.

[0008] Specifically, in the VTOL described in the aforementioned Patent Document 3, all rotors are electrically rotated by motors. Therefore, it is difficult to install a large-capacity battery in the flight device, and there is a problem that it is not easy to extend the continuous flight distance of the VTOL. Furthermore, when a common rotor is used for takeoff, landing, and horizontal flight, rotor control becomes complicated, and there is a problem that ensuring stability during flight is not necessarily easy.

[0009] The present invention has been made in consideration of these problems, and an object of the present invention is to provide a flying device that achieves high levels of stability, efficiency, and long-term flight during flight.

[0010] The flying device of the present invention has a vertical flight rotor and a horizontal flight rotor, the vertical flight rotor being rotated by a motor, and the horizontal flight rotor being rotated by being drivingly connected to an engine.

[0011] The flight device of the present invention has a vertical flight rotor and a horizontal flight rotor, the vertical flight rotor being rotated by a motor, and the horizontal flight rotor being driven by an engine. According to the flight device of the present invention, the vertical flight rotor is rotated by the motor, allowing the motor to control the rotation speed of the vertical flight rotor with high precision during takeoff and landing. Furthermore, during horizontal flight, the engine drives the horizontal flight rotor to rotate, allowing the horizontal flight rotor to rotate with high efficiency, thereby extending the continuous flight distance of the flight device.

[0012] Fig. 1 is a top view showing a flight device according to an embodiment of the present invention; Fig. 2 is a top view showing the vicinity of the engine and horizontal flight rotor of a flight device according to an embodiment of the present invention; Fig. 3 is a top view showing the vicinity of the engine of a flight device according to an embodiment of the present invention; Fig. 4 is a top view showing a flight device according to another embodiment of the present invention; Fig. 5 is a side view showing a flight device according to another embodiment of the present invention; Fig. 6 is a top view showing the vicinity of the engine and horizontal flight rotor of a flight device according to another embodiment of the present invention.

[0013] A flying device 10 according to an embodiment of the present invention will be described in detail below with reference to the drawings. In the following description, forward, backward, left, and right directions will be used. Forward refers to the direction in which the flying device 10 moves during flight, and backward refers to the opposite direction of forward. Left and right directions refer to the left and right directions when the flying device 10 is viewed from the front. In the following description, identical components will generally be given the same reference numerals, and repeated explanations will be omitted.

[0014] FIG. 1 is a top view of a flying device 10.

[0015] The flight device 10 is a device that flies in the air by having a vertical flight rotor 11 and a horizontal flight rotor 12. Specifically, the flight device 10 is a VTOL. The flight device 10 can take off and land vertically by rotating the vertical flight rotor 11. Furthermore, the flight device 10 can fly forward horizontally by rotating the horizontal flight rotor 12. The flight device 10 is also referred to as a drone, hybrid drone, or parallel hybrid drone.

[0016] Specifically, the flight device 10 mainly comprises a main body 20, a first wing 21 and a second wing 22, a vertical flight rotor 11, a horizontal flight rotor 12, and an engine 40. In addition to these components, the flight device 10 also comprises transmission equipment such as sensors and a CPU, a fuel tank, cargo to be transported, etc.

[0017] The main body 20 is a generally cylindrical member made of a synthetic resin plate, a metal plate, or the like, and extends in the front-rear direction. The main body 20 accommodates an engine 40, various electrical components, luggage, and the like.

[0018] The first wing portion 21 and the second wing portion 22 are wing-shaped portions extending in the left-right direction from the main body portion 20. The first wing portion 21 extends leftward from the left side surface of the main body portion 20. The second wing portion 22 extends rightward from the right side surface of the main body portion 20.

[0019] The vertical flight rotor 11 is a rotor rotated by a motor 13. The vertical flight rotor 11 rotates about a vertical axis when the flight device 10 takes off, lands, or hover. This rotation of the vertical flight rotor 11 allows the flight device 10 to ascend, descend, or hover in the vertical direction. The vertical flight rotor 11 may be fixed in position so that its rotation axis is perpendicular to the horizontal plane that is the main surface of the first wing section 21 and the second wing section 22. Furthermore, the vertical flight rotor 11 may be configured so that its rotation axis can be displaced by an actuator or the like.

[0020] Specifically, the vertical flight rotor 11 has a first sub-rotor 111 to a fourth sub-rotor 114 .

[0021] The first sub-rotor 111 and the second sub-rotor 112 are provided on the first wing portion 21. The first sub-rotor 111 is disposed inside a first installation hole 241, which is a substantially circular through-hole provided in the first wing portion 21. The first sub-rotor 111 is rotated by a first motor 131. The second sub-rotor 112 is disposed inside a second installation hole 242, which is a substantially circular through-hole provided in the first wing portion 21. The second sub-rotor 112 is rotated by a second motor 132.

[0022] The third sub-rotor 113 and the fourth sub-rotor 114 are provided on the second wing portion 22. The third sub-rotor 113 is disposed inside a third installation hole 243, which is a substantially circular through-hole provided in the second wing portion 22. The third sub-rotor 113 is rotated by a third motor 133. The fourth sub-rotor 114 is disposed inside a fourth installation hole 244, which is a substantially circular through-hole provided in the second wing portion 22. The fourth sub-rotor 114 is rotated by a fourth motor 134.

[0023] The horizontal flight rotor 12 is a rotor that rotates by being drivingly connected to the engine 40. When the flight device 10 is flying horizontally, the horizontal flight rotor 12 rotates around a horizontal axis that is the longitudinal direction of the main body 20. This rotation of the horizontal flight rotor 12 enables the flight device 10 to fly forward along the horizontal direction.

[0024] The horizontal flight rotor 12 has a first horizontal flight rotor 121 and a second horizontal flight rotor 122. The first horizontal flight rotor 121 and the second horizontal flight rotor 122 are arranged side by side in the left-right direction at the rear end of the main body 20. The first horizontal flight rotor 121 and the second horizontal flight rotor 122 rotate around a horizontal axis along the front-to-rear direction, generating thrust that propels the flight device 10 forward.

[0025] The drive force transmission structure that transmits the drive force of the engine 40 to the first horizontal flight rotor 121 and the second horizontal flight rotor 122 will be described with reference to FIG. 2 .

[0026] The calculation control unit 29 is, for example, a CPU, and receives the output of each sensor mounted on the flight device 10 and controls the operation of each device such as the vertical flight rotor 11 and the horizontal flight rotor 12.

[0027] In this embodiment, the vertical flight rotor 11 is rotated by the motor 13, and the rotation speed of the vertical flight rotor 11 can be controlled with high precision by the motor 13 during takeoff, landing, and hovering, ensuring the airborne stability of the flight device 10. Furthermore, during horizontal flight, the engine 40 drives the rotation of the horizontal flight rotor 12, allowing the horizontal flight rotor 12 to rotate with high efficiency, thereby increasing the continuous flight distance of the flight device 10.

[0028] FIG. 2 is a top view showing the power transmission structure in the vicinity of the engine 40 and the horizontal flight rotor 12 of the flight device 10.

[0029] As described above, in this embodiment, the horizontal flight rotor 12 is driven by the engine 40. In addition, the power interrupter 25 is disposed between the engine 40 and the horizontal flight rotor 12.

[0030] To explain the drive configuration around the engine 40, power transmission means are arranged between the engine 40 and the horizontal flight rotor 12. The means include an engine drive shaft 18, a power interrupter 25, a power transmission unit 16, and a rotor drive shaft 17. Furthermore, a generator 15 driven by the engine 40 is arranged near the engine 40.

[0031] As will be described later, the engine 40 has a first engine section 41 and a second engine section 42 that are arranged opposite each other to achieve low vibration. The first engine section 41 generates a rotational driving force for driving the first horizontal flight rotor 121 and the generator 151. The second engine section 42 generates a rotational driving force for driving the second horizontal flight rotor 122 and the generator 152. The specific structure of the engine 40 will be described with reference to FIG. 3.

[0032] The engine-side drive shaft 18 is a drive shaft that is connected to and rotates with a crankshaft of the engine 40, which will be described later. A first engine-side drive shaft 181 and a second engine-side drive shaft 182 extend from the engine 40 as the engine-side drive shaft 18.

[0033] The first engine drive shaft 181 is connected to a first crankshaft 412 of the first engine section 41 (described later) and is a drive shaft that transmits the rotational driving force that rotates the first horizontal flight rotor 121. The first engine drive shaft 181 has a first front drive shaft 1811, which is its front portion, and a first rear drive shaft 1812, which is its rear portion. A first power connection / disconnection unit 251 (described later) is disposed between the first front drive shaft 1811 and the first rear drive shaft 1812. In addition, a second pulley 232 is connected to the rear end of the first rear drive shaft 1812 so as to be non-rotatable relative to the first rear drive shaft 1812.

[0034] The second engine drive shaft 182 is connected to a second crankshaft 422 of the second engine section 42 (described later) and is a drive shaft that transmits the rotational driving force that rotates the second horizontal flight rotor 122. The second engine drive shaft 182 has a second front drive shaft 1821, which is its forward portion, and a second rear drive shaft 1822, which is its rear portion. A second power connection / disconnection unit 252 (described later) is disposed between the second front drive shaft 1821 and the second rear drive shaft 1822. A third pulley 233 is connected to the rear end of the second rear drive shaft 1822 so as to be non-rotatable relative to the second rear drive shaft 1822.

[0035] The power interrupter 25 is disposed between the engine 40 and the horizontal flight rotor 12 and interrupts the power transmitted from the engine 40 to the horizontal flight rotor 12. A clutch may be used as the power interrupter 25, and more specifically, an electromagnetic clutch, a centrifugal clutch, or the like may be used. The power interrupter 25 has a first power interrupter 251 and a second power interrupter 252.

[0036] The first power connecting / disconnecting unit 251 is disposed between the first front drive shaft 1811 and the first rear drive shaft 1812. When the first power connecting / disconnecting unit 251 is in a connected state, the rotational drive force is transmitted from the first front drive shaft 1811 to the first rear drive shaft 1812. On the other hand, when the first power connecting / disconnecting unit 251 is in a disconnected state, the rotational drive force is not transmitted from the first front drive shaft 1811 to the first rear drive shaft 1812.

[0037] The second power connecting / disconnecting unit 252 is disposed between the second front drive shaft 1821 and the second rear drive shaft 1822. When the second power connecting / disconnecting unit 252 is in a connected state, the rotational drive force is transmitted from the second front drive shaft 1821 to the second engine-side drive shaft 182. On the other hand, when the second power connecting / disconnecting unit 252 is in a disconnected state, the rotational drive force is not transmitted from the second front drive shaft 1821 to the second rear drive shaft 1822.

[0038] The rotor drive shaft 17 includes a first rotor drive shaft 171 and a second rotor drive shaft 172 .

[0039] The first rotor drive shaft 171 is a generally rod-shaped member that rotates the first horizontal flight rotor 121. The first horizontal flight rotor 121 is connected to the rear end of the first rotor drive shaft 171 in a manner that prevents relative rotation. The first pulley 231 is connected to the front end of the first rotor drive shaft 171 in a manner that prevents relative rotation.

[0040] The second rotor drive shaft 172 is a generally rod-shaped member that rotates the second horizontal flight rotor 122. The second horizontal flight rotor 122 is connected to the rear end of the second rotor drive shaft 172 in a manner that prevents relative rotation. The fourth pulley 234 is connected to the front end of the second rotor drive shaft 172 in a manner that prevents relative rotation.

[0041] The power transmission unit 16 has a first power transmission unit 161 and a second power transmission unit 162. For example, a belt, a transmission rod, a gear train, etc. can be used as the first power transmission unit 161 and the second power transmission unit 162. In this embodiment, a belt is used as an example of the first power transmission unit 161 and the second power transmission unit 162.

[0042] The first power transmission unit 161 is configured to extend in a direction intersecting the axial direction of the first rotor drive shaft 171 or the first engine-side drive shaft 181. Specifically, the axial direction of the first rotor drive shaft 171 or the first engine-side drive shaft 181 extends along the front-rear direction. The first power transmission unit 161 also extends along the left-right direction. Therefore, the axial direction of the first rotor drive shaft 171 or the first engine-side drive shaft 181 is perpendicular to the first power transmission unit 161. This allows the first rotor drive shaft 171 to be positioned on the left side. Specifically, the first power transmission unit 161 is a belt and is stretched between the first pulley 231 and the second pulley 232. With this configuration, the first power transmission unit 161 drivingly connects the first rotor drive shaft 171 and the first engine-side drive shaft 181.

[0043] The second power transmission unit 162 is configured to extend in a direction intersecting the axial direction of the second rotor drive shaft 172 or the second engine-side drive shaft 182. Specifically, the axial direction of the second rotor drive shaft 172 or the second engine-side drive shaft 182 extends along the front-rear direction. The second power transmission unit 162 also extends along the left-right direction. Therefore, the axial direction of the second rotor drive shaft 172 or the second engine-side drive shaft 182 is perpendicular to the second power transmission unit 162. This allows the second rotor drive shaft 172 to be positioned on the right side. Specifically, the second power transmission unit 162, which is a belt, is stretched between the third pulley 233 and the fourth pulley 234. With this configuration, the second power transmission unit 162 drivingly connects the second rotor drive shaft 172 and the second engine-side drive shaft 182.

[0044] The first power transmission unit 161 and the second power transmission unit 162 extend in a direction perpendicular to the rotor drive shafts 17 and the engine-side drive shafts 18, thereby enabling the first rotor drive shaft 171 and the second rotor drive shaft 172 to be spaced apart. Specifically, the distance between the first rotor drive shaft 171 and the second rotor drive shaft 172 is defined as L10, the radius of the first horizontal flight rotor 121 is defined as L11, and the radius of the second horizontal flight rotor 122 is defined as L12. In this case, L10 is set to be longer than the sum of L11 and L12. This ensures that the first horizontal flight rotor 121 and the second horizontal flight rotor 122 are sufficiently spaced apart, preventing physical contact between the first horizontal flight rotor 121 and the second horizontal flight rotor 122 during rotation and further preventing aerodynamic interference.

[0045] The generator 15 is a device that generates electricity using the driving force of the engine 40. The generator 15 has a generator 151 and a generator 152. The generator 151 is connected to a first crankshaft 412 of the first engine section 41 (described later) via a generator-side drive shaft 261. The generator 152 is connected to a second crankshaft 422 of the second engine section 42 (described later) via a generator-side drive shaft 262. The vertical flight rotor 11 described above rotates using the electric power generated by the generators 151 and 152.

[0046] The operation of the engine 40 to rotate the horizontal flight rotor 12 will now be described.

[0047] First, when rotating the first horizontal flight rotor 121 and the second horizontal flight rotor 122, the first power connection / disconnection unit 251 and the second power connection / disconnection unit 252 are connected. When the engine 40 is operated in this state, the rotational drive force generated by the rotation of the first engine unit 41 is transmitted in the following order: first front drive shaft 1811, first power connection / disconnection unit 251, first rear drive shaft 1812, first power transmission unit 161, and first rotor drive shaft 171, thereby rotating the first horizontal flight rotor 121. The rotational drive force of the first engine unit 41 is also transmitted to the generator 151 via the generator-side drive shaft 261, and the generator 151 generates electricity. Meanwhile, the rotational driving force generated by the rotation of the second engine unit 42 is transmitted in the following order: second front drive shaft 1821, second power interrupter 252, second rear drive shaft 1822, second power transmission unit 162, and second rotor drive shaft 172, thereby rotating the second horizontal flight rotor 122. The rotational driving force of the second engine unit 42 is also transmitted to the generator 152 via the generator-side drive shaft 262, causing the generator 152 to generate electricity. The rotation of the first horizontal flight rotor 121 and the second horizontal flight rotor 122 generates thrust for flying the flight device 10 forward.

[0048] On the other hand, when the first horizontal flight rotor 121 and the second horizontal flight rotor 122 are not rotating, the first power interrupter 251 and the second power interrupter 252 are in an interrupted state. Therefore, all of the power generated by the rotation of the first engine unit 41 and the second engine unit 42 is allocated to the generators 151 and 152, thereby increasing the amount of power generation.

[0049] 3 is a top view showing the vicinity of the engine 40 of the flight device 10. The engine 40 is an opposed-type engine.

[0050] The engine 40 has a first engine section 41 and a second engine section 42 arranged opposite the first engine section 41. The first engine section 41 and the second engine section 42 are housed inside a casing block 43.

[0051] The first engine section 41 has a first piston 411, a first crankshaft 412, and a first connecting rod 413. The first connecting rod 413 rotatably connects the first piston 411 and the first crankshaft 412 together.

[0052] The second engine section 42 has a second piston 421, a second crankshaft 422, and a second connecting rod 423. The second connecting rod 423 rotatably connects the second piston 421 and the second crankshaft 422.

[0053] The first crankshaft 412 has its front end connected to the generator-side drive shaft 261 and its rear end connected to the first engine-side drive shaft 181. The second crankshaft 422 has its front end connected to the generator-side drive shaft 262 and its rear end connected to the second engine-side drive shaft 182.

[0054] A first piston 411 and a second piston 421 are disposed inside the cylinder 44. Furthermore, inside the cylinder 44, the space sandwiched between the first piston 411 and the second piston 421 forms a combustion chamber 45. The first piston 411 and the second piston 421 reciprocate in opposition to each other inside the cylinder 44. This movement causes the first crankshaft 412 and the second crankshaft 422 to rotate. The rotation direction of the first crankshaft 412 and the rotation direction of the second crankshaft 422 are opposite to each other.

[0055] The engine 40 has the first engine section 41 and the second engine section 42 arranged opposite each other, which minimizes vibration during operation. This prevents various sensors mounted on the flight device 10, such as acceleration sensors and direction sensors, from malfunctioning due to vibrations generated during operation of the engine 40.

[0056] The flight device 10 configured as shown in FIGS. 1 to 3 performs vertical takeoff, hovering, horizontal flight, and vertical landing as follows.

[0057] During vertical takeoff, referring to FIG. 1 , the first motor 131 through the fourth motor 134 rotate the first sub-rotor 111 through the fourth sub-rotor 114 at a predetermined rotational speed. In this manner, the flight device 10 lifts off a landing surface, such as the ground, and ascends to a predetermined altitude. As the flight device 10 ascends, the arithmetic and control unit 29 individually controls the rotational speeds of the first motor 131 through the fourth motor 134 based on the output of each sensor so that the flight device 10 maintains a predetermined position and attitude in the air. Also, referring to FIG. 2 , during vertical takeoff, the arithmetic and control unit 29 disconnects the power interrupter 25, preventing the driving force of the engine 40 from being transmitted to the horizontal flight rotor 12, preventing the horizontal flight rotor 12 from rotating. In this manner, all or most of the driving force of the engine 40 can be supplied to the generator 15. Therefore, by increasing the amount of power generated by the generator 15, driving the first motor 131 to the fourth motor 134 at high speed, and rotating the first sub-rotor 111 to the fourth sub-rotor 114 at high speed, the flight device 10 can take off at high speed. During vertical takeoff, the power generated by the engine 40 is supplied directly to the first motor 131 to the fourth motor 134 without going through the battery. The same applies during hovering and landing.

[0058] During hovering, the first motor 131 through the fourth motor 134 are rotated at a predetermined speed based on instructions from the calculation and control unit 29. The calculation and control unit 29 also individually adjusts the rotation speeds of the first motor 131 through the fourth motor 134 so that the flight device 10 maintains a predetermined position and attitude in the air. This allows the flight device 10 to hover at a constant altitude and position and attitude in the air. Even during hovering, the calculation and control unit 29 disconnects the first power interrupter 251 and the second power interrupter 252, preventing the first horizontal flight rotor 121 and the second horizontal flight rotor 122 from rotating. Therefore, the generators 151 and 152 can generate electricity using all of the power generated by the operation of the first engine unit 41 and the first engine unit 42.

[0059] When transitioning from vertical takeoff to horizontal flight, the calculation and control unit 29 connects the first power connection / disconnection unit 251 and the second power connection / disconnection unit 252. As a result, referring to FIG. 2 , the rotational drive force of the first engine unit 41 of the engine 40 is transmitted to the first horizontal flight rotor 121 via the first engine drive shaft 181, the first power transmission unit 161, and the first rotor drive shaft 171. This causes the first horizontal flight rotor 121 to rotate at a predetermined rotational speed. Similarly, the rotational drive force of the second engine unit 42 of the engine 40 is transmitted to the second horizontal flight rotor 122 via the second engine drive shaft 182, the second power transmission unit 162, and the second rotor drive shaft 172. This causes the second horizontal flight rotor 122 to rotate at a predetermined rotational speed. As the first horizontal flight rotor 121 and the second horizontal flight rotor 122 begin to rotate, the flight device 10 begins to move forward horizontally. At this time, the calculation and control unit 29 continues to rotate the first motor 131 to the fourth motor 134, and the first sub-rotor 111 to the fourth sub-rotor 114 continue to rotate. In this way, the calculation and control unit 29 starts the horizontal direction while stably floating due to the rotation of the first sub-rotor 111 to the fourth sub-rotor 114.

[0060] During horizontal flight, the first horizontal flight rotor 121 and the second horizontal flight rotor 122 rotate at high speed, allowing the flight device 10 to fly at high speed along a horizontal path. At this time, the calculation control unit 29 does not rotate the first motor 131 to the fourth motor 134, thereby stopping the first sub-rotor 111 to the fourth sub-rotor 114.

[0061] When transitioning from horizontal flight to vertical landing, the calculation and control unit 29 reduces the output of the engine 40 to slow the rotational speed of the first horizontal flight rotor 121 and the second horizontal flight rotor 122. This slows the movement speed of the flight device 10. At the same time, the calculation and control unit 29 drives the first motor 131 to the fourth motor 134 to rotate the first sub-rotor 111 and the fourth sub-rotor 114, thereby obtaining a predetermined buoyancy.

[0062] During vertical landing, the calculation and control unit 29 adjusts the rotation speeds of the first motor 131 and the fourth motor 134 to rotate the first sub-rotor 111 through the fourth sub-rotor 114 at a predetermined rotational speed. This causes the flight device 10 to gradually lower its altitude until it lands on the ground. At this time, the calculation and control unit 29 disconnects the first power interrupter 251 and the second power interrupter 252, preventing the first horizontal flight rotor 121 and the second horizontal flight rotor 122 from rotating. This allows more of the rotational power of the engine 40 to be distributed to the generators 151 and 152, increasing the amount of power generated. Therefore, the large amount of power generated by the generators 151 and 152 allows the first motor 131 through the fourth motor 134 to rotate stably.

[0063] The configuration of a flight device 10 according to another embodiment will be described with reference to Figures 4 to 6. The basic configuration and basic operation of the flight device 10 shown in Figures 4 to 6 are the same as those shown in Figure 1. In the flight device 10 shown in Figures 4 to 6, the first horizontal flight rotor 121 and the second horizontal flight rotor 122 are stacked on top of each other at the rear end of the main body 20. The following description will focus on these points.

[0064] Fig. 4 is a top view of the flight device 10 according to another embodiment. Fig. 5 is a side view of the flight device 10 according to another embodiment.

[0065] 4 and 5 , the flight device 10 has a first horizontal flight rotor 121 and a second horizontal flight rotor 122 that are stacked as the horizontal flight rotors 12. The horizontal flight rotor 12 having such a configuration is also called a pusher. The first horizontal flight rotor 121 and the second horizontal flight rotor 122 are rotationally driven by the engine 40.

[0066] The flying device 10 has a main body 20, a first wing 21, and a second wing 22. An outrigger 301 is disposed below the first wing 21, and an outrigger 302 is disposed below the second wing 22.

[0067] 1 , the flight device 10 has a first sub-rotor 111 to a fourth sub-rotor 114 and a first motor 131 to a fourth motor 134. The first sub-rotor 111 and the first motor 131 are disposed in the forward portion of the outrigger 301. The second sub-rotor 112 and the second motor 132 are disposed in the aft portion of the outrigger 301. The third sub-rotor 113 and the third motor 133 are disposed in the forward portion of the outrigger 302. The fourth sub-rotor 114 and the fourth motor 134 are disposed in the aft portion of the outrigger 302.

[0068] Bladder tanks for storing fuel are disposed inside the first wing section 21 and the second wing section 22. Furthermore, inside the main body 20 are disposed various devices constituting the control system, such as the calculation control unit 29, the cargo to be transported by the flight device 10, and batteries that supply power to the various electrical devices constituting the flight device 10.

[0069] 5, legs 28 are provided on the lower part of the main body 20. The legs 28 are the parts that come into contact with the ground when the flight device 10 lands.

[0070] 6 is a top view showing the vicinity of the engine 40 and horizontal flight rotor 12 of a flight device 10 according to another embodiment. The basic configuration and basic operation of the engine 40 and horizontal flight rotor 12 shown in FIG. 6 are the same as those described with reference to FIG. 2.

[0071] Here, the drive shaft 19 is shown drivingly connecting the engine 40 and the horizontal flight rotor 12. The drive shaft 19 has a first drive shaft 191 drivingly connecting the engine 40 and the first horizontal flight rotor 121, and a second drive shaft 192 drivingly connecting the engine 40 and the second horizontal flight rotor 122. This configuration will be described in detail below.

[0072] The generator 151 is disposed rearward of the first engine section 41, and is rotationally driven by the first engine drive shaft 181. Specifically, the generator 151 has a rotor (not shown), and this rotor is non-rotatably connected to the first engine drive shaft 181. With this configuration, the rotor built into the generator 151 rotates together with the first engine drive shaft 181, causing the generator 151 to generate electricity.

[0073] The configuration of the generator 152 is similar to that of the generator 151. Specifically, the generator 152 is disposed rearward of the second engine section 42, and is rotationally driven by the second engine drive shaft 182. The generator 152 has a rotor (not shown), and this rotor is non-rotatably connected to the second engine drive shaft 182. With this configuration, the rotor built into the generator 152 rotates together with the second engine drive shaft 182, thereby generating electricity by the generator 152.

[0074] The drive shaft 19 is a generally shaft-shaped member that rotates by the driving force generated by the engine 40 to rotate the horizontal flight rotor 12. The drive shaft 19 has a first drive shaft 191 that is rotated by the first engine section 41 and a second drive shaft 192 that is rotated by the second engine section 42. The drive shaft 19 has a mechanism that mechanically rotates coaxially in the opposite directions.

[0075] The rear end of the first drive shaft 191 is connected to the first horizontal flight rotor 121, thereby rotating the first horizontal flight rotor 121. The vicinity of the front end of the first drive shaft 191 is drivingly connected to the first engine drive shaft 181 via a first belt 271. That is, the rotational driving force generated by the first engine section 41 is transmitted to the first drive shaft 191 via the first engine drive shaft 181 and the first belt 271.

[0076] The second drive shaft 192 has its rear end connected to the second horizontal flight rotor 122, thereby rotating the second horizontal flight rotor 122. The vicinity of the front end of the second drive shaft 192 is drivingly connected to the second engine drive shaft 182 via the second belt 272. That is, the rotational driving force generated by the second engine section 42 is transmitted to the second drive shaft 192 via the second engine drive shaft 182 and the second belt 272.

[0077] The first drive shaft 191 and the second drive shaft 192 are arranged coaxially. Specifically, the first drive shaft 191 has a hollow structure, and the second drive shaft 192 is arranged inside the first drive shaft 191. A substantially cylindrical space is formed inside the first drive shaft 191, and the second drive shaft 192 passes through this space. The rear end of the second drive shaft 192 is arranged rearward of the rear end of the first drive shaft 191. The front end of the second drive shaft 192 is arranged forward of the front end of the first drive shaft 191. Furthermore, the first drive shaft 191 and the second drive shaft 192 form a coaxially inverted structure.

[0078] The first belt 271 transmits the rotational driving force of the first engine-side drive shaft 181 to the first drive shaft 191. Specifically, the first belt 271 is stretched between the eighth pulley 238 and the seventh pulley 237. The eighth pulley 238 is connected to the rear end of the first engine-side drive shaft 181 so as to be non-rotatable relative to the first drive shaft 191. The seventh pulley 237 is connected to the front end of the first drive shaft 191 so as to be non-rotatable relative to the first drive shaft 191. The first belt 271 is stretched between the eighth pulley 238 and the seventh pulley 237. With this configuration, when the flight device 10 is flying, the first engine unit 41 is operated, causing the first engine-side drive shaft 181 and the eighth pulley 238 to rotate. Furthermore, the rotational driving force of the eighth pulley 238 is transmitted to the seventh pulley 237 via the first belt 271. This causes the first drive shaft 191 and the first horizontal flight rotor 121 to rotate.

[0079] The second belt 272 has a configuration similar to that of the first belt 271. That is, the second belt 272 transmits the rotational driving force of the second engine-side drive shaft 182 to the second drive shaft 192. The fifth pulley 235 is connected to the rear end of the second engine-side drive shaft 182 so as not to rotate relative to the second drive shaft 192. The sixth pulley 236 is connected to the middle portion of the second drive shaft 192 so as not to rotate relative to the second drive shaft 192. The second belt 272 is installed between the fifth pulley 235 and the sixth pulley 236. With this configuration, when the flight device 10 is flying, the second engine unit 42 is operated, causing the second engine-side drive shaft 182 and the fifth pulley 235 to rotate. Furthermore, the rotational driving force of the fifth pulley 235 is transmitted to the sixth pulley 236 via the second belt 272. This causes the second drive shaft 192 and the second horizontal flight rotor 122 to rotate.

[0080] In this case as well, the power connecting / disconnecting unit 25 can be mounted on the engine side drive shaft 18. The power connecting / disconnecting unit 25 has a first power connecting / disconnecting unit 251 and a second power connecting / disconnecting unit 252.

[0081] The first power connection / disconnection unit 251 is located at a midpoint of the first engine drive shaft 181 and is interposed between the generator 151 and the eighth pulley 238. When the first power connection / disconnection unit 251 is in a connected state, the rotational power generated by the operation of the first engine unit 41 can rotate the first drive shaft 191 and the first horizontal flight rotor 121 via the first engine drive shaft 181. At the same time, power is generated by the generator 151. On the other hand, when the first power connection / disconnection unit 251 is in a disconnected state, the rotational power generated by the operation of the first engine unit 41 is not transmitted to the first drive shaft 191 and the first horizontal flight rotor 121, and the first drive shaft 191 and the first horizontal flight rotor 121 do not rotate. Even in this disconnected state, power generation by the generator 151 continues.

[0082] The second power connection / disconnection unit 252 is located at a midpoint of the second engine-side drive shaft 182 and is interposed between the generator 152 and the fifth pulley 235. When the second power connection / disconnection unit 252 is in a connected state, the rotational power generated by the operation of the second engine unit 42 can rotate the second drive shaft 192 and the second horizontal flight rotor 122 via the second engine-side drive shaft 182. At the same time, power is generated by the generator 152. On the other hand, when the second power connection / disconnection unit 252 is in a disconnected state, the rotational power generated by the operation of the second engine unit 42 is not transmitted to the second drive shaft 192 and the second horizontal flight rotor 122, and the second drive shaft 192 and the second horizontal flight rotor 122 do not rotate. Even in this disconnected state, power generation by the generator 152 continues.

[0083] The operation of the flight device 10 shown in Figures 4 to 6 is similar to that of the flight device 10 shown in Figures 1 to 3. Specifically, the flight device 10 configured as shown in Figures 4 to 6 performs vertical takeoff, hovering, horizontal flight, and vertical landing as follows.

[0084] During vertical takeoff, referring to FIG. 4 , the first motor 131 through the fourth motor 134 rotate the first sub-rotor 111 through the fourth sub-rotor 114 at a predetermined rotational speed. In this manner, the flight device 10 lifts off a landing surface, such as the ground, and ascends to a predetermined altitude. As the flight device 10 ascends, the arithmetic and control unit 29 individually controls the rotational speeds of the first motor 131 through the fourth motor 134 based on the outputs of the sensors so that the flight device 10 maintains a predetermined position and attitude in the air. During vertical takeoff, the arithmetic and control unit 29 also disconnects the first power interrupter 251 and the second power interrupter 252 shown in FIG. 6 . This prevents the driving forces of the first engine unit 41 and the second engine unit 42 from being transmitted to the first horizontal flight rotor 121 and the second horizontal flight rotor 122, preventing the first horizontal flight rotor 121 and the second horizontal flight rotor 122 from rotating. In this manner, all or most of the driving force of the first engine section 41 and the second engine section 42 can be supplied to the generators 151 and 152. Therefore, by increasing the amount of electric power generated by the generators 151 and 152, the first motor 131 to the fourth motor 134 can be driven at high speed, and the first sub-rotor 111 to the fourth sub-rotor 114 can be rotated at high speed, allowing the flight device 10 to take off at high speed. During vertical takeoff, the electric power generated by the engine 40 can be supplied directly to the first motor 131 to the fourth motor 134 without going through a battery. The same applies during hovering and landing.

[0085] During hovering, the first motor 131 through the fourth motor 134 are rotated at a predetermined speed based on instructions from the calculation and control unit 29. The calculation and control unit 29 also individually adjusts the rotation speeds of the first motor 131 through the fourth motor 134 so that the flight device 10 maintains a predetermined position and attitude in the air. This allows the flight device 10 to hover at a constant altitude and position and attitude in the air. Even during hovering, the calculation and control unit 29 disconnects the first power interrupter 251 and the second power interrupter 252, preventing the first horizontal flight rotor 121 and the second horizontal flight rotor 122 from rotating. Therefore, the generators 151 and 152 can generate electricity using all of the power generated by the operation of the first engine unit 41 and the first engine unit 42.

[0086] When transitioning from vertical takeoff to horizontal flight, the calculation and control unit 29 connects the first power connecter / disconnector 251 and the second power connecter / disconnector 252. As a result, referring to FIG. 6 , the rotational drive force of the first engine unit 41 of the engine 40 is transmitted to the first horizontal flight rotor 121 via the first engine drive shaft 181, the first power connecter / disconnector 251, and the first belt 271. This causes the first horizontal flight rotor 121 to rotate at a predetermined rotational speed. Similarly, the rotational drive force of the second engine unit 42 of the engine 40 is transmitted to the second horizontal flight rotor 122 via the second engine drive shaft 182, the second power connecter / disconnector 252, and the second belt 272. This causes the second horizontal flight rotor 122 to rotate at a predetermined rotational speed. As the first horizontal flight rotor 121 and the second horizontal flight rotor 122 begin to rotate, the flight device 10 begins to move horizontally, i.e., forward. At this time, the calculation and control unit 29 continues to rotate the first motor 131 to the fourth motor 134, and the first sub-rotor 111 to the fourth sub-rotor 114 continue to rotate. In this way, the calculation and control unit 29 starts the horizontal direction while stably floating due to the rotation of the first sub-rotor 111 to the fourth sub-rotor 114.

[0087] During horizontal flight, the first horizontal flight rotor 121 and the second horizontal flight rotor 122 rotate at high speed, allowing the flight device 10 to fly at high speed in the horizontal direction, i.e., forward. At this time, the calculation and control unit 29 does not rotate the first motor 131 through the fourth motor 134, thereby stopping the first sub-rotor 111 through the fourth sub-rotor 114.

[0088] When transitioning from horizontal flight to vertical landing, the calculation and control unit 29 reduces the output of the engine 40 to slow the rotational speed of the first horizontal flight rotor 121 and the second horizontal flight rotor 122. This slows the movement speed of the flight device 10. At the same time, the calculation and control unit 29 drives the first motor 131 to the fourth motor 134 to rotate the first sub-rotor 111 and the fourth sub-rotor 114, thereby obtaining a predetermined buoyancy.

[0089] During vertical landing, the calculation and control unit 29 adjusts the rotation speeds of the first motor 131 and the fourth motor 134 to rotate the first sub-rotor 111 through the fourth sub-rotor 114 at a predetermined rotational speed. This causes the flight device 10 to gradually lower its altitude until it lands on the ground. At this time, the calculation and control unit 29 disconnects the first power interrupter 251 and the second power interrupter 252, preventing the first horizontal flight rotor 121 and the second horizontal flight rotor 122 from rotating. This allows more of the rotational power of the engine 40 to be distributed to the generators 151 and 152, increasing the amount of power generated. Therefore, the large amount of power generated by the generators 151 and 152 allows the first motor 131 through the fourth motor 134 to rotate stably.

[0090] According to the above-described embodiment, the following main effects can be achieved.

[0091] Referring to Figure 2, the first horizontal flight rotor 121 is rotated by the first engine section 41, and the second horizontal flight rotor 122 is rotated by the second engine section 42, so that the first horizontal flight rotor 121 and the second horizontal flight rotor 122 can be rotated individually and with high efficiency.

[0092] 2, when the vertical flight rotor 11 rotates for takeoff or landing, the power transmission to the horizontal flight rotor 12 is interrupted by the power interrupter 25, so that the power of the engine 40 can be used for power generation, etc. On the other hand, when horizontal flight is performed by the horizontal flight rotor 12, power is transmitted by the power interrupter 25, so that the horizontal flight rotor 12 can be rotated by the engine 40 with high efficiency.

[0093] Referring to Figure 2, when the power interrupter 25 is in a disconnected state during takeoff, hovering, landing, etc., a large amount of the driving force of the engine 40 can be allocated to the generator 15, increasing the amount of power generated by the generator 15 and allowing power to be allocated to the rotation of other rotors, etc.

[0094] 2, the first power transmission unit 161 and the second power transmission unit 162 extend in a direction perpendicular to the rotor drive shafts 17 and the engine-side drive shafts 18, thereby separating the first rotor drive shaft 171 and the second rotor drive shaft 172. This prevents the first horizontal flight rotor 121 and the second horizontal flight rotor 122 from interfering with each other during rotation.

[0095] Referring to FIG. 6, by having the first horizontal flight rotor 121 and the second horizontal flight rotor 122 arranged so as to overlap, horizontal flight can be effectively performed.

[0096] Referring to Figure 6, the first drive shaft 191 and the second drive shaft 192 are arranged coaxially, so that the second horizontal flight rotor 122 and the second horizontal flight rotor 122, which are arranged one above the other, can be rotated effectively.

[0097] Although the embodiments of the present invention have been described above, the present invention is not limited to these and can be modified within the scope of the present invention. In addition, the above-described embodiments can be combined with each other.

[0098] The invention that can be understood from the above-described embodiment will be described below together with its effects.

[0099] The flight device of the present invention has a vertical flight rotor and a horizontal flight rotor, the vertical flight rotor being rotated by a motor, and the horizontal flight rotor being driven by an engine. According to the flight device of the present invention, the vertical flight rotor is rotated by the motor, allowing the motor to control the rotation speed of the vertical flight rotor with high precision during takeoff and landing. Furthermore, during horizontal flight, the engine drives the horizontal flight rotor to rotate, allowing the horizontal flight rotor to rotate with high efficiency, thereby extending the continuous flight distance of the flight device.

[0100] The flight device of the present invention is also characterized in that a power interrupter is disposed between the engine and the horizontal flight rotor. According to the flight device of the present invention, when the vertical flight rotor rotates to take off or land, the power interrupter cuts off the transmission of power to the horizontal flight rotor, allowing the engine's power to be actively used for generating electricity, etc. On the other hand, when the horizontal flight rotor performs horizontal flight, the power interrupter transmits power, allowing the engine to rotate the horizontal flight rotor with high efficiency, enabling the flight device to operate at high speeds and extending the continuous flight distance.

[0101] The flight device of the present invention is further characterized by comprising a generator driven by the engine. With this flight device, when the power interrupter is in a disconnected state, more of the engine's driving force can be allocated to the generator, increasing the amount of power generated by the generator and allocating power to other rotors, etc.

[0102] The flight device of the present invention further comprises a power transmission unit and a rotor drive shaft, wherein the horizontal flight rotor has a first horizontal flight rotor and a second horizontal flight rotor, the power transmission unit has a first power transmission unit and a second power transmission unit, the rotor drive shaft has a first rotor drive shaft and a second rotor drive shaft, the first horizontal flight rotor is rotated via the first rotor drive shaft, the second horizontal flight rotor is rotated via the second rotor drive shaft, and a first engine drive shaft is transmitted from the engine. a first rotor drive shaft and a second engine-side drive shaft, the first power transmission unit extending in a direction intersecting the axial direction of the first rotor drive shaft or the first engine-side drive shaft and drivingly connecting the first rotor drive shaft and the first engine-side drive shaft, and the second power transmission unit extending in a direction intersecting the axial direction of the second rotor drive shaft or the second engine-side drive shaft and drivingly connecting the second rotor drive shaft and the second engine-side drive shaft. According to the flight device of the present invention, the first power transmission unit and the second power transmission unit extend in a direction, for example, perpendicular to the rotor drive shafts and the engine-side drive shafts, thereby separating the first rotor drive shaft and the second rotor drive shaft. This prevents interference between the first horizontal flight rotor and the second horizontal flight rotor during rotation.

[0103] In addition, in the flight device of the present invention, the engine has a first engine section and a second engine section arranged opposite the first engine section, the horizontal flight rotor has a first horizontal flight rotor and a second horizontal flight rotor, the first horizontal flight rotor is rotated by the first engine section, and the second horizontal flight rotor is rotated by the second engine section. According to the flight device of the present invention, by rotating the first horizontal flight rotor by the first engine section and rotating the second horizontal flight rotor by the second engine section, the first horizontal flight rotor and the second horizontal flight rotor can be rotated independently and with high efficiency.

[0104] The flight device of the present invention further includes a drive shaft drivingly connecting the engine and the horizontal flight rotor, the horizontal flight rotor including a first horizontal flight rotor and a second horizontal flight rotor arranged to overlap the first horizontal flight rotor, and the drive shaft including a first drive shaft drivingly connecting the engine and the first horizontal flight rotor and a second drive shaft drivingly connecting the engine and the second horizontal flight rotor. The flight device of the present invention has the first horizontal flight rotor and the second horizontal flight rotor arranged to overlap, allowing it to effectively perform horizontal flight.

[0105] In addition, in the flight device of the present invention, the first drive shaft and the second drive shaft are arranged coaxially. By arranging the first drive shaft and the second drive shaft coaxially, the first horizontal flight rotor and the second horizontal flight rotor, which are arranged one above the other, can be rotated effectively.

[0106] DESCRIPTION OF SYMBOLS 10 Flight device 11 Vertical flight rotor 111 First sub-rotor 112 Second sub-rotor 113 Third sub-rotor 114 Fourth sub-rotor 12 Horizontal flight rotor 121 First horizontal flight rotor 122 Second horizontal flight rotor 13 Motor 131 First motor 132 Second motor 133 Third motor 134 Fourth motor 15 Generator 151 Generator 152 Generator 16 Power transmission section 161 First power transmission section 162 Second power transmission section 17 Rotor drive shaft 171 First rotor drive shaft 172 Second rotor drive shaft 18 Engine side drive shaft 181 First engine side drive shaft 1811 First front drive shaft 1812 First rear drive shaft 182 Second engine side drive shaft 1821 Second front drive shaft 1822 Second rear drive shaft 19 Drive shaft 191 First drive shaft 192 Second drive shaft 20 Main body 21 First wing portion 22 Second wing portion 231 First pulley 232 Second pulley 233 Third pulley 234 Fourth pulley 235 Fifth pulley 236 Sixth pulley 237 Seventh pulley 238 Eighth pulley 241 First installation hole 242 Second installation hole 243 Third installation hole 244 Fourth installation hole 25 Power connection / disconnection unit 251 First power connection / disconnection unit 252 Second power connection / disconnection unit 261 Generator side drive shaft 262 Generator side drive shaft 271 First belt 272 Second belt 28 Leg 29 Calculation control unit 301 Outrigger 302 Outrigger 40 Engine 41 First engine unit 411 First piston 412 First crankshaft 413 First connecting rod 42 Second engine section 421 Second piston 422 Second crankshaft 423 Second connecting rod 43 Casing block 44 Cylinder 45 Combustion chamber

Claims

1. A flying device having a vertical flight rotor and a horizontal flight rotor, the vertical flight rotor being rotated by a motor, and the horizontal flight rotor being driven and connected to an engine to rotate.

2. The flight device according to claim 1, characterized in that a power interrupter is provided between the engine and the horizontal flight rotor.

3. The flight device according to claim 2, further comprising a generator driven by said engine.

4. The aircraft further comprises a power transmission unit and a rotor drive shaft, the horizontal flight rotor has a first horizontal flight rotor and a second horizontal flight rotor, the power transmission unit has a first power transmission unit and a second power transmission unit, the rotor drive shaft has a first rotor drive shaft and a second rotor drive shaft, the first horizontal flight rotor is rotated via the first rotor drive shaft, and the second horizontal flight rotor is rotated via the second rotor drive shaft, a first engine side drive shaft and a second engine side drive shaft are derived from the engine, the first power transmission unit is configured to extend in a direction intersecting the axial direction of the first rotor drive shaft or the first engine side drive shaft, and drivingly connects the first rotor drive shaft and the first engine side drive shaft, 2. The flight device according to claim 1, characterized in that the second power transmission unit is configured to extend along a direction intersecting an axial direction of the second rotor drive shaft or the second engine side drive shaft, and drivingly connects the second rotor drive shaft and the second engine side drive shaft.

5. The flight device described in claim 1, characterized in that the engine has a first engine section and a second engine section arranged opposite the first engine section, the horizontal flight rotor has a first horizontal flight rotor and a second horizontal flight rotor, the first horizontal flight rotor is rotated by the first engine section, and the second horizontal flight rotor is rotated by the second engine section.

6. The flight device described in claim 1, further comprising a drive shaft drivingly connecting the engine and the horizontal flight rotor, the horizontal flight rotor having a first horizontal flight rotor and a second horizontal flight rotor arranged so as to overlap the first horizontal flight rotor, and the drive shaft having a first drive shaft drivingly connecting the engine and the first horizontal flight rotor, and a second drive shaft drivingly connecting the engine and the second horizontal flight rotor.

7. The flight device according to claim 6, characterized in that the first drive shaft and the second drive shaft are arranged coaxially.

8. A flying device comprising a vertical flight rotor, a horizontal flight rotor, a generator, and a power interrupter, wherein the vertical flight rotor is rotated by a motor, the horizontal flight rotor is rotated by being drivingly connected to an engine, the generator is driven by the engine, and the power interrupter is disposed between the engine and the horizontal flight rotor, and when the power interrupter is in a connected state, power is transmitted from the engine to the horizontal flight rotor, and when the power interrupter is in a disconnected state, power is not transmitted from the engine to the horizontal flight rotor, and the generator is driven by the engine.

9. The aircraft further comprises a power transmission unit and a rotor drive shaft, the horizontal flight rotor has a first horizontal flight rotor and a second horizontal flight rotor, the power transmission unit has a first power transmission unit and a second power transmission unit, the rotor drive shaft has a first rotor drive shaft and a second rotor drive shaft, the first horizontal flight rotor is rotated via the first rotor drive shaft, and the second horizontal flight rotor is rotated via the second rotor drive shaft, a first engine side drive shaft and a second engine side drive shaft are derived from the engine, the first power transmission unit is configured to extend in a direction intersecting the axial direction of the first rotor drive shaft or the first engine side drive shaft, and drivingly connects the first rotor drive shaft and the first engine side drive shaft, 9. The flight device according to claim 8, characterized in that the second power transmission unit is configured to extend along a direction intersecting an axial direction of the second rotor drive shaft or the second engine side drive shaft, and drivingly connects the second rotor drive shaft and the second engine side drive shaft.

10. The flight device described in claim 8, characterized in that the engine has a first engine section and a second engine section arranged opposite the first engine section, the horizontal flight rotor has a first horizontal flight rotor and a second horizontal flight rotor, the first horizontal flight rotor is rotated by the first engine section, and the second horizontal flight rotor is rotated by the second engine section.

11. The flight device described in claim 8, further comprising a drive shaft drivingly connecting the engine and the horizontal flight rotor, the horizontal flight rotor having a first horizontal flight rotor and a second horizontal flight rotor arranged to overlap the first horizontal flight rotor, and the drive shaft having a first drive shaft drivingly connecting the engine and the first horizontal flight rotor, and a second drive shaft drivingly connecting the engine and the second horizontal flight rotor.

12. The flight device according to claim 11, wherein the first drive shaft and the second drive shaft are arranged coaxially.

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