JP2022151899A - Aircraft equipped with telescopic wing - Google Patents

Abstract

To provide an aircraft which changes a wing with a large wing width to a small wing width in view of convenience of road transportation or road travel in order to improve flight efficiency.SOLUTION: An aircraft comprises a telescopic wing which can expand and store a wing part by gas pressure, and a wheel for ground travel that is driven by power. The telescopic wing used in the aircraft is configured from: an air sac with airtightness and flexibility for holding a pressure of an injected gas; a rope that supports a structure by a pulling force; and a valve which constrains entry/exit of the gas in/from the air sac and a rib which maintains a wing sectional shape.SELECTED DRAWING: Figure 1

Description

The present invention is used in an aircraft for transporting people or cargo, and an object of the present invention is to achieve both flight performance and ground running performance.

Airplanes are equipped with wings to achieve flight and generate lift required for flight. In order to improve flight performance, it is necessary to reduce the drag that accompanies the required lift and increase the lift-to-drag ratio.

By increasing the slenderness ratio (aspect ratio) of the wing, the induced drag can be reduced and the lift-to-drag ratio can be increased. The following patent documents disclose flying objects that increase the lift-to-drag ratio by adjusting the slenderness ratio of the wings.
JP 2001-41694

The above-mentioned existing wings with a large slenderness ratio increase the overall width of the aircraft, making it difficult to coexist with ground infrastructure such as other means of transportation and roads when moving on the ground.

In addition, the above-mentioned existing wings with a large slenderness ratio do not use the lift force during movement on the ground, and the drag force reduces the ground traveling performance.

In addition, since the wheels of existing aircraft are not equipped with power and propellers used in the air, such as propellers, are used to move on the ground, the ground running performance is low.

The problem is solved by the following aircraft according to claims 1 to 5.

for the purpose of transporting people or goods,
a telescopic wing that can be expanded and retracted by gas pressure;
wheels driven by power;
A manned or unmanned aerial vehicle characterized by

The telescopic wing used in the aircraft,
an airtight and flexible bladder for holding the pressure of the injected gas;
a rope that supports the structure with a tensile force;
a valve that restricts the entry and exit of gas into and out of the air sac, and a rib that maintains a blade cross-sectional shape;
An aircraft characterized by comprising

The telescopic wing used in the aircraft,
a plurality of independent air sacs;
An aircraft characterized by comprising a plurality of independent valves

The telescopic wing used in the aircraft,
deformed by manipulation of the cord or pressure within the air sac;
controlling the flight of the aircraft by increasing or decreasing the lift generated;
an aircraft characterized by

The wheels used in the aircraft are:
Each wheel is driven by an independent electric motor,
an aircraft characterized by

According to the present invention, the telescopic wing allows the aircraft to achieve both high flight performance obtained by deploying the wing and ease of movement on the ground due to the small overall width obtained by retracting the wing.

In addition, the telescopic wings of the aircraft can reduce efficiency by retracting the wings when moving on the ground, and can improve ground running performance.

In addition, the aircraft can efficiently transmit the driving force to the road surface when moving on the ground by the wheels driven by the power, thereby improving the ground traveling performance.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments (examples) of the present invention will be described in more detail with reference to the drawings.
FIG. 1 is a side view of an aircraft with telescopic wings.
FIG. 2 is a top view of an aircraft with telescopic wings.
FIG. 3 is a front view of an aircraft with telescopic wings.
The specifications of the aircraft 1 are as follows.
Aircraft 1 weighs 950 kg. The cruising speed is 150 kilometers per hour.
The aircraft 1 has a normal wing configuration with the main wing forward. However, a thousand-tail arrangement may be used.
The telescopic wing 2 is a main wing and obtains lift during flight. The main wing plane area in flight is 8 square meters. Also, the vertical stabilizer and horizontal stabilizer that control the attitude of the aircraft 1 are telescopic wings. However, the vertical and horizontal tails may be normal tails that are not telescopic wings.
The telescopic wing 2 is composed of air bladders 3 , wing holding cables 4 , control cables 5 , valves 6 and ribs 7 .
The air sac 3 is divided into three sections in the front-rear direction and six independent sections in total in the left and right.
However, the number of divisions may be other than six.
The bladder 3 is a flexible fabric of high strength polyethylene with a thickness of 0.2 millimeters.
It has been processed to keep it airtight. However, aramid fiber or nylon cloth or film may also be used.
The wing-holding cords 4 are made of high-strength carbon fiber. However, aramid fibers and cellulose nanofibers may also be used.
The steering cable 4 is made of high-strength carbon fiber. However, aramid fibers and cellulose nanofibers may also be used.
The control cable 4 is connected to an electric actuator and is adjustable in length. However, hydraulic actuators, pneumatic actuators, or human power may be used.
A valve 6 is provided in each of six independent compartments of the bladder 3 . The maximum working pressure is 10 MPa. It comes with a check valve that keeps the air sac airtight. However, separate valves may be provided for increasing and decreasing the pressure in the bladder.
The rib 7 has a wing cross-sectional shape and is made of a carbon fiber composite material. The air sacs 3 are perforated so that the air can move in the lateral direction of the wing, and the pressure inside the air sac 3 is uniform.
The propeller 8 generates forward thrust during flight. With an electric motor with an output of 80 kW and a propeller. However, an internal combustion engine and a propeller, or a jet engine may be used.
Ground traveling electric motors 10 each having an output of 10 kilowatts are connected to the left and right wheels 9 . The wheels 9 may be retracted inside the aircraft 1 during continuous flight.

In FIG. 3, the aircraft 1 is in a state in which the telescopic wings 2 are deployed. Air flows into the bladder 3 through the valve 6, and the air pressure in the bladder 3 is higher than the atmospheric pressure. However, the gas to be put into the bladder 3 may be a gas other than air, such as nitrogen, hydrogen, or carbon dioxide. The telescopic wing 2 maintains its wing cross section by the pressure of the air sac 3 and the shape of the rib 7 . The lift generated in the telescopic wing 2 as the aircraft 1 moves forward is transmitted to the aircraft 1 by the pressure of the air sac 3 , the pulling force of the wing holding cables 4 , and the pulling force of the control cables 5 .

In FIG. 4, the aircraft 1 is in a stowed state with the telescopic wings 2 . Air is removed from the air sac 3 through the valve 6 to reduce the volume of the air sac 3 and store it. Since the air bladder 3, the cable 4 and the control cable 5 are flexible, they do not hinder retraction of the telescopic wing 2.

In FIG. 5, one compartment of the bladder 3 is under pressure due to injury. Since the air sac 3 is divided into six independent compartments, even if the pressure in one compartment drops, the remaining five compartments can support the telescopic wing 2 and partially retain the function as a wing.

In FIG. 6, the telescoping wing 2 is deformed in the torsional direction by shortening the control cable 5 with an electric actuator to increase the lift force. The aircraft 1 can be operated as a roll motion by twisting the left and right telescopic wings 2 in opposite directions, and as a high-lift device by twisting them in the same direction. However, instead of the control cable 5, the telescopic wing 2 may be deformed and steered by changing the pressure of the independent air sacs 3 respectively.

In FIG. 7, the aircraft 1 retracts the telescoping wing 2 and is in a taxi state. The propeller 8 is stopped. The wheels 9 are rotated by the power of the electric motor 10 to enable efficient forward and backward travel. Also, turning is possible by rotating the left and right wheels in opposite directions. The wheels 9 may be retracted inside the aircraft 1 during continuous flight.

FIG. 1 is a side view for explaining the configuration of the aircraft 1. FIG. FIG. 2 is a top view for explaining the configuration of the aircraft 1. FIG. FIG. 3 is a front view for explaining the configuration of the aircraft 1. FIG. FIG. 4 is a diagram of the telescopic wing 2 in a stored state. FIG. 5 is a diagram showing a state in which a part of the air sac 3 provided on the telescopic wing 2 is damaged. FIG. 6 shows a state in which the telescopic wing 2 is steered by the control cable 5. FIG. FIG. 7 is a diagram showing a state in which the aircraft 1 is taxiing on the wheels 9. As shown in FIG.

1 Aircraft 2 Telescopic Wing 3 Air Sac 4 Wing Retaining Cable 5 Control Cable 6 Valve 7 Rib 8 Propeller 9 Wheel 10 Electric Motor for Ground Traction

Claims (5)

for the purpose of transporting people or goods,
a telescopic wing that can be expanded and retracted by gas pressure;
wheels driven by power;
A manned or unmanned aerial vehicle characterized by The telescopic wing used in the aircraft,
an airtight and flexible bladder for holding the pressure of the injected gas;
a rope that supports the structure with a tensile force;
a valve that restricts the entry and exit of gas into and out of the air sac, and a rib that maintains a blade cross-sectional shape;
An aircraft characterized by comprising The telescopic wing used in the aircraft,
a plurality of independent air sacs;
a plurality of independent valves;
An aircraft characterized by comprising The telescopic wing used in the aircraft,
deformed by manipulation of the cord or pressure within the air sac;
controlling the flight of the aircraft by increasing or decreasing the lift generated;
an aircraft characterized by The wheels used in the aircraft are:
Each wheel is driven by an independent electric motor,
an aircraft characterized by

Images