JPH0727693U - Radio-controlled model airplane with motor-powered flapping wings - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a radio-controlled model airplane that adopts a new flight method to eliminate the danger of propellers and the noise of engines and propellers. [Structure] The crank 4 is rotated by the power of a battery-powered motor. The crank 4 and the left and right flapping wings 2 provided at both ends of the fixed blade 1 are connected by the left and right connecting rods 5. The flapping wing 2 has several ribs 8 on an arm 6 and an elastic body 7
The sheet 9 is attached so as to cover and cover the whole. A radio-controlled model airplane having the above structure as a propulsion device.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a radio-controlled model airplane that uses a motor as a power source to fly its wings to fly with the motive force.

[0002]

[Prior art]

 The conventional radio-controlled model airplane is a propeller that rotates at high speed, so it was extremely dangerous if the operator accidentally touched it with a propeller or accidentally touched it. In addition, noise was loud due to the engine sound when using the engine, and due to the wind noise of the propeller even when using the motor.

[0003]

[Problems to be solved by the present invention]

 In order to eliminate such drawbacks, the inventor of the present invention decided to abolish the propeller and instead make the wings fly by the power of the motor. In that case, a model airplane capable of flying with a wireless control device must be relatively large. Therefore, sufficient propulsion force must be generated by the flapping motion. However, when a large wing performs flapping motion, excessive force is required due to the inertia of the wing itself when changing the direction of movement from downhill to uphill or from uphill to downhill. .. Therefore, a large load is applied to the power system, and the energy of the battery is unnecessarily consumed to heat the motor. This was a problem with large flapping wings. Therefore, the inventor searched for a flapping wing structure that can generate a large propulsive force even with a small motor power.

[0004]

[Means for Solving the Problems]

 The present invention will be described with reference to the drawings, in which flapping wings 2 are attached to both ends of a mono- or bi-leaf fixed wing 1 so as to allow a flapping motion by a hinge or the like. Power is a battery-powered motor. The rotation of the motor is decelerated by the gearbox 3 to rotate the crank 4. The crank 4 is connected to the left and right L-shaped arms 6 by the left and right connecting rods 5. The flapping wing 2 has a skeleton in which several ribs 8 are attached to an arm 6 supported by an elastic body 7 such as a piano wire. A thin sheet 9 such as polyethylene is attached to the frame. The above is the configuration for producing the propulsive force of the present invention. Since the feature of this plan is to use motor power and unique flapping wing and fixed wing combination, other conventional propellers were used for controlling rudder 10 and elevator 11 and controlling motor rotation speed. It is no different from a radio-controlled model airplane.

[0005]

[Action]

 In the present proposal, most of the lift force for floating the airframe is generated by the fixed wing 1, so the flapping wing 2 needs to generate only the propulsive force for moving the airframe forward. For this reason, the flapping wing 2 can be simplified and the efficiency of flapping propulsion can be pursued without paying attention to the generation of lift. The elastic body 7 supporting the rib 8 of the present invention functions to change the elevation angle of the flapping wing 2 when the flapping wing 2 is launched and when it is downed. When the flapping wing 2 is raised or lowered, the elastic body 7 is naturally deformed accordingly, and the mounting angle of the rib 8 is changed, so that an appropriate elevation angle change is obtained. Further, when the vertical moving direction is changed, the moving direction of the flapping wing 2 can be easily changed due to the restoring force of the deformed elastic body 7. Therefore, a smooth flapping motion can be realized, and wasteful energy consumption is reduced. As a result, it is possible to obtain sufficient propulsion power for flight even with limited motor power. The control method of the present invention is no different from the conventional propeller propulsion. With sufficient propulsion, it can be started and operated as in the case of propeller propulsion.

[0006]

【Example】

 Since the feature of this plan is to use motor power and unique combination of flapping wing and fixed wing, various shapes similar to those of the conventional radio-controlled model airplane are allowed for the shape of the other parts. Therefore, the form of a bird may be imitated by omitting the rudder 10 of the tail wing and providing a steering system such as providing an auxiliary wing for steering at the trailing edge of the fixed wing. In addition, if a new fixed blade is attached above or below the fixed blade 1 to form a compound leaf, the size is reduced and the strength for the crank mechanism is easily secured.

[0007]

【effect】

 As mentioned above, this proposal has no propeller that rotates at high speed, and the only moving part that is exposed is the slowly moving crank mechanism. However, there is no danger caused by a propeller. Also, since there is no wind noise from the propeller, there is no worry of noise because the motor is used as the power instead of the engine. Moreover, its flight method is similar to that of a bird, and since it stimulates scientific wonders, it is not only used as a hobby for model airplane lovers, but also effective as a science teaching material.

[Brief description of drawings]

FIG. 1 is a perspective view of the present invention.

[Explanation of symbols]

1 is a fixed wing, 2 is a flapping wing, 3 is a gear box, 4 is a crank, 5 is a connecting rod, 6 is an arm, 7 is an elastic body, 8 is a rib, 9 is a seat, 10 is a rudder, 11 is an elevator.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area A63H 31/08 E

Claims (1)

[Scope of utility model registration request] 1. A radio-controlled model airplane having a flapping wing driven by a motor.