JPH06499U - Electric free flight model plane - Google Patents

Abstract

(57) [Summary] [Purpose] An electric free-flight model that can stabilize the weight balance of the fuselage, increase the efficiency of the fan with almost no resistance when sucking air, and further cool the storage battery to extend the flight time. Offer the plane. [Structure] A wind path is formed in the front-back direction in the fuselage of the airframe 1,
An air intake port 9 is opened in the front part of the air passage, an air ejection port 11 is opened in the rear part of the air passage, and a propulsion fan 7 with a motor directly driven by a rear motor is installed in the air passage. Then, the propulsion fan 7 is rotated by energizing the motor from the storage battery mounted on the airframe 1, and the air taken into the air passage from the air intake port 9 by the propulsion fan 7 is blown out vigorously from the air ejection port 11. In the electric free flight model plane that uses the propulsive force to fly the aircraft 1 by the charge capacity of the storage battery, the storage battery 6 was integrally attached to the rear portion of the shaft center of the motor of the motorized propulsion fan 7 and air-cooled.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric free flight model plane in which the aircraft flies by the charge capacity of the installed battery without radio control from the ground, and in particular, a model in which the storage battery and the propulsion fan are integrated. Regarding the plane.

[0002]

[Prior art]

 A propulsion fan driven by a motor is attached to the fuselage of the aircraft, which is made of styrofoam, etc., and the fan is powered by energizing the motor from the storage battery installed in the aircraft to drive the fan's charge capacity. An electric free flight model plane that can fly the aircraft freely is known. FIG. 6 shows a conventional example of this type of electric model plane. In this model plane, a fan 31 integrated with the motor 30 is mounted with its front facing the air passage in the fuselage of the fuselage 32, and a nickel for supplying power to the motor 30 is provided in the fuselage in front of the fan. -A cadmium storage battery 33 is built in. Further, air intake ports 34 are opened on both left and right sides of the body, and the air sucked into the air duct by the rotation of the fan 31 from the intake ports 34 is pushed rearward to be ejected from the rear ejection port 35. It is supposed to be ejected vigorously. In the figure, Q1 shows the flow of air that is sucked in, Q2 shows the flow of air that is jetted out, and the jetting force of this air gives propulsive force to the airframe 32, and the amount of power charged to the storage battery 33 is You can fly only for the duration of your flight while being consumed. In another electric model plane (not shown), an air intake port is opened on the lower side of the fuselage, and the air that is sucked into the air passage inside the fuselage from this intake port by a fan with an integrated motor Some are designed to be blown out vigorously from the rear spout. Even in this model plane, the storage battery that supplies power to the motor is built in the fuselage in front of the fan.

[0003]

In the above-described conventional electric model plane, the fan 31 with the motor and the storage battery 33 are attached in a dispersed manner in the front-rear direction of the body, so that the balance of the body 32 is not stable. There is a problem. In addition, it is necessary to secure a storage space for the storage battery 33 inside the body in front of the fan, and the air intake ports 34 must be provided on the left and right sides of the body. When the air intake ports 34 are provided on both sides of the body in this way, the air is obliquely sucked toward the fan 31 in the body from the front as shown by the arrow Q1, so that the resistance at the time of suction is increased and the fan 31 is Reduce efficiency. Even if an air intake is provided in the lower part of the fuselage like other model planes, the air is sucked from diagonally below toward the fan in the fuselage because it is obstructed by the storage battery storage space in front of the fan. When sucked in, the resistance increases and the efficiency of the fan decreases. Further, in this type of model plane, a motor 30 of high output is used because it is necessary to obtain a large propulsive force, and the motor 30 consumes a large amount of power and the battery 33 generates heat when the motor is driven. For this reason, there is a problem that the performance of the battery 33 deteriorates and the flight time that can stay in the air with one charge is shortened.

The present invention has been proposed in order to solve the problems of the related art, and it is possible to stabilize the balance of the machine body, and there is almost no resistance when sucking air, and the fan is The objective is to provide an electric free-flight model plane that can increase air-efficiency and cool the storage battery, and thus prolong flight time.

[0005]

[Means for Solving the Problems]

 In the electric free flight model plane of the present invention that achieves this purpose, an air duct having an air intake opening at the front and an air jet opening at the rear is formed in the front-back direction inside the fuselage of the aircraft. A propulsion fan with a motor is installed, and the propulsion fan is rotated by energizing the motor from the storage battery installed in the machine.The rotation of the propulsion fan causes the air taken in from the air intake to the air duct. In an electric free-flight model plane in which the aircraft is ejected from the air ejection port to provide propulsion power and the aircraft is driven by the charge capacity of the storage battery, the storage battery is integrally attached to the rear of the shaft center of the motor of the propulsion fan with motor. I have to.

[0006]

[Action]

 According to the above-described configuration, the propulsion fan and the storage battery are integrated, so that the balance of the body is stabilized and the storage battery can be constantly air-cooled by the fan.

[0007]

【Example】

 Hereinafter, a specific embodiment of the electric free flight model plane according to the present invention will be described in detail with reference to the drawings. FIG. 1 shows a perspective view of this model plane, FIG. 2 shows a plan view, and FIG. 3 shows a side view. As shown in these figures, a lightweight body 1 made of styrofoam resin is composed of a body portion 2, a main wing 3, a horizontal stabilizer 4, and a vertical stabilizer 5. A propulsion fan 7 with a motor integrally equipped with a storage battery 6 at the rear is provided in the wind passage 8 formed in the axial direction inside the fuselage at a substantially center of gravity position of the fuselage portion 2 where the main wing 3 is provided. It is installed in. An air intake port 9 communicating with the air passage 8 is largely opened in the body portion 2 in front of the fan 7. With this model plane, it is not necessary to provide a storage space for the storage battery inside the fuselage on the front side of the fan, so as shown in Fig. 4, air can be sucked into the lower surface of the fuselage in front of the air intake port without resistance. A suction guide recess 10 is largely formed in the front extension direction of the air intake 9. An air ejection port 11 communicating with the air passage is opened at the rear portion of the body portion 2.

Next, the structure of the propulsion fan 7 integrated with a storage battery will be described. As shown in FIG. 5, a motor 14 supported by a radial stay 13 is attached to the axial center of the cylindrical duct 12, and the output shaft of the motor 14 protruding to the front side in the duct 12 is attached. A fan blade 15 having 9 blades is attached to 14a. Further, at the rear portion of the motor 14, a nickel-cadmium storage battery 6 whose one end side is fitted and inserted into a cylindrical storage case 16 is integrally mounted toward the rear in the axial direction. The nickel-cadmium storage battery 6 is made up of a plurality of storage batteries connected in series in a single package, and a battery storage case 16 in which the storage battery 16 is mounted is integrally provided at the rear part of a cylindrical case 17 for storing the motor 14. ing. A switch case 18 is attached to the lower surface of the duct 12 so as to be exposed to the outside of the fuselage. A switch 19 provided on the side surface of the case 18 turns on the power supply from the storage battery 6 to the motor 14. It can be turned off. A charging terminal 20 is attached to the lower surface of the case 18 so that the storage battery 6 can be charged from the outside.

In the electric free flight model plane configured as described above, it is necessary to charge the storage battery 6 on the ground each time immediately before flying, and this charging is performed by a charger (not shown) prepared on the ground. It is performed via the charging terminal 20. When the switch 19 is turned on at the start of flight, the high-output motor 17 is energized to rotate the fan blades 15 at high speed, and air is taken into the air passage 8 from the intake port 9 that opens largely at the lower front surface. And is jetted vigorously from the jet port 11 at the rear part as shown by an arrow P2. When the body part 2 is gripped by holding the body part 2 in a horizontal state above the head part and pushed out forward, the body part 1 obtains propulsive force due to the jetting force of air, and the charge capacity of the storage battery 6 at one time is increased. You can keep flying as much as you want. The flight direction of the airframe 1 at this time can be changed by adjusting the ladder 5a of the vertical tail 5 and the elevator 4a of the horizontal tail 4. In this model plane, the propulsion fan 7 with a motor integrated with the storage battery 6 is installed at the center of gravity of the machine body 1 to stabilize the balance of the machine body 1. Further, since the storage battery 6 is constantly cooled by the air blown from the propulsion fan 7, the performance of the storage battery 6 can be maintained high. Further, since the air intake 9 has a large opening at the lower front side, and the recess 10 for guiding air intake is formed on the front side of the air intake 9, the air is taken in as shown by an arrow P1. It is sucked straight into the mouth 9. Therefore, there is almost no resistance to sucking air into the thrust fan 7, the efficiency of the fan 7 is increased, and a strong propulsive force is obtained.

[0010]

[Effect of device]

 As described above, according to the present invention, since the storage battery is integrally attached to the rear axial direction of the motor-equipped propulsion fan, the storage battery can be constantly air-cooled by the fan and heat generation of the storage battery can be prevented. . As a result, unlike the conventional case, the performance of the storage battery is not deteriorated due to heat generation, and it is possible to extend the dwell time by one charge. In addition, since it is not necessary to dispose the propulsion fan and the storage battery separately in the front-rear direction of the body as in the conventional case, the body can be well-balanced and stably flown. In addition, because it is not necessary to secure a storage space for the storage battery in front of the fan for propulsion, the air intake can be opened widely in the front part of the fan, and there is almost no resistance to suck air into the fan. The efficiency can be improved and a large propulsive force can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an electric free flight model plane according to the present invention.

FIG. 2 is a plan view of the model plane of FIG.

FIG. 3 is a side view of the model plane.

FIG. 4 is a perspective view of an air intake port of the model plane viewed from the bottom surface direction.

FIG. 5 is a vertical cross-sectional view of a propulsion fan integrated with a storage battery used in the model plane as seen from a side direction.

FIG. 6 is a perspective view showing a conventional model plane.

[Explanation of symbols]

1 Aircraft 2 Body part 3 Main wing 4 Horizontal tail 5 Vertical tail 6 Storage battery 7 Propulsion fan 8 Air passage 9 Air intake 10 Air intake guide recess 11 Air jet 12 Duct 13 Stay 14 Motor 15 Fan blade 16 Storage battery Storage case 17 Motor storage case 18 Switch case 19 Switch 20 Charging terminal

Claims (1)

[Scope of utility model registration request] 1. An air passage having an air intake opening at a front portion and an air ejection opening at a rear portion is formed in a front-rear direction in a fuselage of a fuselage, and a propulsion fan with a motor is installed in the air passage. By rotating the propulsion fan by energizing the motor from the storage battery installed in the machine, the rotation of the propulsion fan causes the air taken into the air passage from the air intake port to be ejected from the air ejection port to be used as propulsion power. An electric free flight model plane in which the storage battery is integrally attached to the rear of the shaft center of the motor of the propulsion fan with the motor in the electric free flight model plane for flying the aircraft by the charging capacity of.