KR100406752B1 - Rocket for students capable of parachute working cap in itself - Google Patents

Abstract

The present invention relates to a learning rocket in which the dropping device is installed.

Learning rockets that launch high-pressure air with propulsion instead of rockets from fuel combustion will fall freely after reaching the highest height. At this time, there is no separate device, and as it falls randomly as it reaches the ground, it may cause considerable damage to surrounding users, spectators or the facility with considerable energy when reaching the ground. However, as a learning rocket, a complicated parachute release device cannot be installed separately.

The present invention is to cover the funnel-shaped cap on top of the simple learning rocket and to have a built-in parachute folded therein to loosen the coupling between the cap and the rocket body. Therefore, when the rocket reaches its highest point and the rising energy reaches "0", the rocket in the vertical state is unbalanced in any direction. At this time, the cap loosened in the inclined direction while being unbalanced is peeled off, and the parachute suspended on the connecting strap connected to the cap is exposed while being pulled out so that the parachute is unfolded by the air resistance received during the fall.

Therefore, it prevented the rapid descent by the parachute when the rocket descends, so that the rocket launch experiment could be easily carried out by young elementary and middle school students, and the effect of greatly reducing the risk of safety accidents could be greatly reduced.

Description

Learning rocket with dropping device {Rocket for students capable of parachute working cap in itself}

The present invention relates to a learning rocket in which the dropping device is installed.

Although rockets are usually fired by burning gunpowder or other fuels, it is difficult for students and the general public to launch them easily. In particular, even if students want to experiment with rocket launching, there are many cases where the cost or launch site is not appropriate for fuel combustion.

Even if the launching point is secured, the rocket reaching the highest point after launching will increase the speed by gravity acceleration as it reaches the ground, so when it reaches the ground, it will have the same energy as when it was launched. As a result, severe injuries and damages occur when colliding with a learner, spectator, or facility.

Utility No. 294941 (filed Dec. 17, 1998) "parachute on the top of a toy rocket, and parachute dropping with semi-circular resilience connected to the connection part 6a to the head separation plate mounting chamber 5 And head-receiving plate 3 and the head-receiving part 2 connected by the parachute and the parachute dismounting and the head-separating plate mounting chamber 5 and the connection part 6b into one object and injection molding into the head-receiving part 2. The toy rocket that was fired from the ground after installing the parachute breaker containing the toy rocket head (1) in the toy rocket and held it in the fire until the moment when it dropped due to gravity at the aerial point where the propulsion is lost The weight, gravity and propulsion of the head receiving portion 2 accommodating the rocket head 1 are eliminated and the falling gravity of the opposite phenomenon occurs. The head receiving portion 2 accommodating the toy rocket head 1 has its own weight. For leaning on the ground for toys in the mounting room Due to the weight of the rocket head 1 and the head accommodating part 2, the parachute release and the elasticity of the head separation plate 3 accommodated are operated, and the head accommodating part accommodating the toy rocket head 1 with the elasticity. The structure of the toy rocket parachute release device for pushing (2) to open and at the same time the parachute (4) connected to the exposed parachute release and the head separating plate (3) is detached and deployed. " As a result, most of the mounting chambers could not be separated and fall as they were. The problem with the above approach is that when a rocket launched vertically loses thrust at the highest flight point, the rocket tilts and starts to descend, it must be tilted in the exact opposite hinged position to open the cap and vice versa. There is an extremely unscientific shortcoming that this peeling, and then the parachute unfolding, is purely fortunate.

In order to remedy these shortcomings, the spring is installed or bounced off by another elastic mechanism, but it is all that is not working properly at the highest point of the rocket.

Another example is the use of a device, such as a solenoid, to enable a kind of ballistic device to operate when the peak is reached using an electronic device. But in reality, it's a student-made rocket, and the elevation of the high-pressure air takes only a few seconds, and it's virtually impossible for elementary and secondary students to assemble and operate the electronics at that moment by calculating the exact peak. It is a task. In particular, if the rocket is manufactured through such a complicated process, most students lose interest in the process of producing it, and thus the science learning effect cannot be achieved. In addition, in US Pat. No. 4,038,776, Northcon (same as the cap in this paper) Is installed loosely at the tip of the rocket and configured like a telescope barrel. When the user compresses the tube with the rocket into the lower tube for the launch, the air inside the tube with the rocket is compressed. There is also. However, if the Northcon is pulled down rapidly with the Northcon loosely placed, the rocket will peel off the rocket or Northcon which is placed on the tube by the law of inertia. Therefore, vertical firing is difficult, and as it is a type that is gradually compressed in an inclined state like a toy air gun, the elevation is only a few meters. .

The present invention is to provide a rocket in which the parachute can be released while the cap mounted on the parachute separates themselves without installing a special separation means.

In addition, in installing a parachute issuing structure, even if the elementary and middle school students to produce a very simple and effective parachute mounted rocket with no problems.

1 is a partial cutaway side view showing the overall configuration of the present invention,

Figure 2 is a side view showing the configuration of the cap open state,

3 is a real-mounted picture showing a state in which the rocket of the present invention is installed in a manual launch pad, Figure 4 is a conceptual diagram for the altitude measurement after the rocket launch of the present invention.

<Explanation of symbols for the main parts of the drawings>

5: Parachute 12: Cap 13: Parachute 14: Weight 11: Body 12: Cap 12a: Upper sharp part 12b: Mounting body part 13b: Inner space part 13a: Connecting string

The present invention is loosely capped on the upper portion of the rocket body portion of the hollow rod-shaped body filled with air or water, connecting the body portion and the cap by a connecting strap therein and installing a parachute near the middle of the rocket When this peak is reached, the propulsion is lost and the vehicle descends to the point where the cap descends, providing a rocket to launch the parachute with the cap detaching.

Hereinafter, with reference to the accompanying drawings a specific embodiment of the present invention.

Figure 1 is a side cross-sectional configuration of the cap loosely assembled on the top of the rocket, Figure 2 shows a state in which the cap is open. 3 is a real picture showing a state installed in the actual launch pad. Figure 4 illustrates a method of measuring the peak while showing the parachute release process when the peak reached after launch of the present invention.

The present invention is a hollow rod-shaped body, only the bottom is open, the outer peripheral surface of the lower is attached to the induction wing, the upper portion of the learning pneumatic propulsion rocket using a high pressure air configured sharply, funnel cap (12 The lower end diameter of the) is slightly larger than the upper end diameter of the rocket to fit loosely on the upper part of the body, and the upper and lower centers of gravity of the cap body are eccentric to the upper side,

One end of the connecting string 13a is fixed to the upper separating plate 13c of the inner space portion 13b of the mounting body, and the other end is integrally connected with the body of the rocket. It relates to a learning rocket equipped with a dropping device characterized in that the rocket is always connected.

As another embodiment of the present invention shown in Figure 2, the upper sharp portion 12a of the cap is made of a sharp cone shape while using an elastic material such as rubber or soft synthetic resin having a higher density than the lower side of the rocket. It is configured to facilitate coupling with the top structure. The parachute mounting body 12b, which is the lower end of the cap, is integrated into the upper side of the cap in the form of a skirt so as to surround the upper end of the rocket. Therefore, the upper sharp portion 12a of the cap is to replace the weight 14 by weight (instead of the weight to induce flight stability of the rocket). The mounting body portion and the upper sharp portion 12a of the cap allows students to manufacture by gluing directly with an adhesive tool such as a tape at the rocket launching competition. In addition, between the upper separation plate 13c of the inner space of the cap and the body of the rocket to be connected to each other using a connecting strap (13a) to connect the parachute (5) to the inner space of the funnel cap in the present invention. The upper separation plate 13c formed in the portion prevents the parachute from jamming the upper portion of the sharply formed cap, thereby making it difficult to extract the parachute. That is, in the absence of a separator plate, the cap is in close contact with the body by the upward propulsion force of the rocket rising at a high speed, so that the parachute is sometimes stuck tightly to the upper sharp part of the cap.

All of the rocket structure of the present invention was developed for the learner's understanding and scientific thinking can be purchased separately from the rocket launching competition or at home, or can be produced only with a suitable thin plastic plate, PET container and tape.

The lower part of the cap is slightly larger than the upper diameter of the rocket, specifically, about 1 to 5 mm, and more precisely, to have an error of about 1 to 3 mm.

The rocket of the present invention has such a structure that it is slightly uneasy until just before the vertical launch, but until the rocket is launched and reaches the highest point of flight, the force that pushes the cap from the top down by the upward thrust force and the atmospheric pressure acts. . Therefore, while the cab is raised, it is fixed to the top of the rocket to fly. However, when the rocket reaches the highest point in its flight, the upward thrust force is "0", and as a result, the force to press down the cap is canceled, so the cap is put back in a very uneasy state. Then, when the rocket is inclined to one side and attempts to start the drop motion, the cap on the top of the rocket (the weight for flight stability) is slid off the body. In this case, the connecting string connected to the cap is pulled and the parachute tied thereto is discharged.

As mentioned above, the present invention solves the problem of injury or damage to the aircraft by colliding with the ground or other objects while having a considerable amount of energy when reaching the ground by falling from the highest peak.

In other words, when a certain peak is reached, the rocket will incline in any direction from top to bottom as the rising energy is lost, and the cap on the top of the rocket (which acts as a weight for flight stability) will slide off the body. Therefore, the parachute is discharged with the connecting string connected to the cap and the parachute is exposed to the outside. If the rocket and cap begin to descend while exposed, the parachute unfolds because it eventually receives air resistance. Therefore, in very exceptional circumstances where the cap does not slip, for example, failure is a smooth parabolic trajectory with a firing angle of less than 45 degrees, the cap may not be separated, but in most cases successful opening is achieved.

In addition to these exceptional cases, most elementary and junior high school students can use the parachute simply by making a simple cap and inserting a separate weight therein, which has been effective in understanding physical laws of elementary and junior high school students. Comparative test example 1. Test comparison place: Gangnam Elementary School Grand Stadium 2. Comparative object: Comparison of parachute release and ascending trajectory according to weight weight installation and connection string installation 3. Test comparison method (1) The apparatus used for launching on the rocket and the launching equipment uses the air rocket and the air rocket launch pad provided by the present inventor. 32mmm in diameter, body length 750mm, total weight 170g, parachute diameter 340mm, filling a 3.5 liter high-pressure cylinder with high pressure air to eject air in a single shot to launch a rocket. (2) Industrial Compressor (2 horsepower) is charged with 100 psi air pressure and fired the same for each rocket. (3) The highest altitude of the rocket is measured by the digital altitude measuring instrument shown in FIG. The distance between the point and the measuring point (here 50m) was calculated by altitude (H) = tan (measuring angle) x measuring distance (50m). (4) Due to parachute release from the rocket's highest flight point (5) Fire 20 times for each rocket (except for measurement of microscopic wind direction or wind speed) a . Flight stability test Rocket: No weight installed Rocket or weight We installed weight. Table I Measured altitude and vertical elevation Vertical exit rate Remarks Rocket About 45 degrees 50 ± 3m 8 ± 1。 It shows vertical rising angle distortion of about 8 degrees at 90 degrees vertical rising standard. Rocket Me About 55 degrees 70 ± 3m 1 ± 1。 At 90 degrees vertical angle, the vertical elevation angle distortion rate is about 1 degree. As shown in the above result, if the weight is not added to the upper part of the cap, it does not achieve vertical rise while rising, showing the vibration phenomenon during the rising. As a result, ascending energy is consumed, the elevation is reduced by about 30%. Parachute Emission Test Rocket C: Parachute is simply loaded inside the cap, not by connecting straps D: Connecting parachute by connecting straps Table II Parachute Release Rate Flight time Remarks Rocket Everything 10 ± 5% 3 ± 1 second If the parachute is not deployed, the flight time will dive to within 3 seconds Rocket LA 100% 10 ± 1 second Longer flight time as parachute unfolds As shown in the above table, if there is no connecting strap, the emission probability of the parachute released remains at about 10%, while the connecting strap is installed and all the parachutes are released, thereby exhibiting a drop function. In addition, the rocket has a significantly shorter flight time because the parachute does not operate and free fall, while the rocket of the present invention exhibits more than twice the flight time. If there is no connection between the bodies, it can be seen that there are significant differences in the functions of the rocket's vertical elevation, vertical orbit and parachute operation.

Claims (2)

In the hollow rod-shaped body, only the lower part is open, and the outer peripheral surface of the lower part is equipped with an induction wing, and the upper part uses the high-pressure air of sharply configured propulsion power for learning. The lower end diameter of the funnel cap 12 is larger than the upper end diameter of the rocket body to loosely fit the upper end of the funnel, and the parachute 13 folded into the inner space is embedded, and the upper inner side of the cap body There is a weight (14) built in so that the center of gravity of the upper and lower eccentric upwards, One end of the connecting string 13a is fixed to the upper separating plate 13c of the inner space portion 13b of the mounting body, and the other end is integrally connected with the body of the rocket. A learning rocket equipped with a dropping device, characterized in that the rocket is always connected. The method of claim 1, A learning rocket equipped with a dropping device, characterized in that the upper sharp portion 12a of the cap is made of a sharp cone shape while using an elastic material having a higher density than the lower side.