Holding and take-off device for hydropneumatically driven aircraft, in particular model rockets

Abstract

A holding and starting device for hydro-pneumatically driven aircrafts composed of a base body carrying a flange that can be connected to it, the flange furthermore merging into a hollow cylinder portion receiving at least one sealing ring, latches pivotable about a shaft, and having a latch engagement means for a locking ring of the aircraft, and a release ring rotatably mounted on the base body, so that a release of the locking ring of the aircraft can take place. The latches have an actuating surface, which surface causes a pivoting movement of the latches when a nozzle-like neck portion of the aircraft is put on. With or at a rotation of the release ring against pretension, stop ends of the latches move into a respective associated setoff or a respective associated recess, so that the latches release the locking ring for starting.

Claims

1. A holding and starting device for hydro-pneumatically driven aircraft, composed of a base body (1) carrying a flange (7) that can be connected to it, the flange (7) furthermore merging into a hollow cylinder portion (8) receiving at least one sealing ring (9) arranged at an outer circumference side, latches (2) pivotable about a shaft (10; 2a), located on the flange and laterally encompassing the hollow cylinder portion (8), and having a latch engagement means (2g) for a locking ring (14) of the aircraft (100), a release ring (3; 11) rotatably mounted on the base body (1) relative to a longitudinal axis of the hollow cylinder portion (8) and having recesses or setoffs (12) for receiving stop ends (2c) of the respective latch (2), so that a release of the locking ring (14) of the aircraft (100) can take place, the release ring (3; 11) being rotatable in one or more rotational directions, characterized in that the latches (2) have an actuating surface (2f) between a point of rotation of the shaft (2a) and the latch engagement means (2g) which surface causes a pivoting movement of the latches (2) when a nozzle-like neck portion (13) of the aircraft (100) is put on, with a consequence, that the respective latch engagement means (2g) engages behind the locking ring (14), furthermore the release ring (3; 11) is pretensioned in one of its rotational directions by means of an energy accumulator (6), wherein with a pivoting movement of the latches (2) with their respective latch engagement means (2g) toward the locking ring, the stop ends (2c) of the latches (2) are subjected to a positional change and exit the respective recess or the respective setoff (12) such that the release ring (3; 11) turns into a holding end position, and with or at a rotation of the release ring (3; 11) against the pretension, the stop ends (2c) of the latches (2) move into the respective associated setoff or the respective associated recess (12), so that the latches (2) release the locking ring (14) for starting, wherein the latches (2) are in this respect subjected to a pretension in an area between the point of rotation of the shaft (2a) and the stop end (2c) toward a center or middle point of the release ring (3; 11).

2. The device according to claim 1, characterized in that a radially oriented actuating pin (15) is arranged on the release ring (3; 11).

3. The device according to claim 1, characterized in that the energy accumulator (6) is a warp spring.

4. The device according to claim 1, characterized in that opposite the stop end (2c), the respective latch (2) has a groove or notch (2b) for receiving a spring element (5) in a guiding manner.

5. The device according to claim 4, wherein the spring element (5) is an annular spring or an elastic O-ring.

6. The device according to claim 1, characterized in that the hollow cylinder portion (8) merges into a first lateral channel (16) within the flange (7), wherein this channel (16) is in connection with an overpressure valve.

7. The device according to claim 1, characterized in that the hollow cylinder portion (8) merges into a second lateral channel within the flange, wherein the second channel can be connected to a filling device.

8. The device according to claim 1, characterized in that the hollow cylinder portion (8) has a bottom side and a channel (17) at the bottom side which is in connection with a safety valve (20) that can be actuated by rotating the release ring (3; 11).

9. The device according to claim 1, characterized in that the hollow cylinder portion (8) merges into a third lateral channel within the flange (7), wherein the third channel is in connection or can be brought into connection with a pressure accumulator.

10. The device according to claim 1, characterized in that the release ring (3; 11) can be actuated electromechanically or electromagnetically.

11. The device according to claim 1, characterized in that the hollow cylinder portion (8) is formed as a starting tube or accommodates a separate starting tube.

12. The device according to claim 1, characterized in that the hollow cylinder portion (8) is exchangeable for adapting to various aircraft (100).

13. The device according to claim 1, characterized in that the latches are exchangeable for adapting to various aircraft (100).

14. The device according to claim 1, characterized in that the base body (1) can be connected to a starting plate (103) or a starting stand.

15. The device according to claim 1, characterized in that the hollow cylinder portion is in connection with a pressure measuring device (105).

16. The device according to claim 1, characterized in that the release ring (3) is in connection with a stop (4) for limiting its rotational movement.

17. The device according to claim 1, wherein the hydro-pneumatically driven aircraft is a model rocket.

Description

(1) The invention will be explained in more detail below on the basis of an exemplary embodiment and with reference to Figures.

(2) Shown are in:

(3) FIGS. 1 to 6 a sequence as a schematic sketch illustrating the process of locking and releasing in the interaction of a bottle as a flying object, a latch, a release ring and a stop;

(4) FIG. 7 a detail representation of the holding and starting device in a lateral view with latches being spread apart, and a bottle body with a bottleneck, prior to be pushed onto the hollow cylinder portion;

(5) FIG. 8 a representation similar to that according to FIG. 7 along line A-A as a longitudinal section;

(6) FIGS. 9 and 10 section representations along line B-B, once in the non-locked, i.e. open state, and in the locked, i.e. closed state;

(7) FIG. 11 a longitudinal section representation along line A-A in the closed state, i.e. the flying object being locked;

(8) FIG. 12 a detail representation of a latch according to the invention as an essential component of the holding and starting device;

(9) FIG. 13 a further detail representation in a perspective view, comprising an exemplary latch together with an O-ring for generating a pretension acting upon the latch;

(10) FIG. 14 a representation of a release ring having setoffs or recesses, and an inserted wrap spring for generating a pretension in a preferential rotational direction of the release ring;

(11) FIG. 15 a representation of an exemplary entire arrangement, comprising a holding and starting device mounted onto a starting board with a pressure measuring device, a connectable hand pump for pressure generation, as well as a pull cord with a pull button for remotely actuating the release ring; and

(12) FIG. 16 a flow chart of an exemplary model rocket start using the device according to the invention.

(13) The device according to the invention will now be explained with reference to the above-mentioned Figures and an exemplary embodiment resulting therefrom.

(14) As a flying object for a model rocket, a commercial, for example, PET beverage bottle 100 is used.

(15) In their bottleneck area 13, such beverage bottles 100, on the one hand, have a thread, and, on the other, at least one circumferential locking ring 14.

(16) The respective bottle 100 that is partially filled with water, is slipped upside down onto the holding and starting device according to the invention and insofar is pushed with its bottleneck 13 onto the hollow cylinder portion 8 that is adapted in its diameter.

(17) An O-rung 9 provides in this case the necessary sealing so as to avoid water from exiting during pressure application of the flying object.

(18) The hollow cylinder portion 8 is an integral component of a flange 7. By way of example, both the flange 7 and the hollow cylinder portion 8 may be manufactured in one piece as a turned part, or may be fabricated, for example, by plastic injection molding.

(19) Embedded into the flange 7 and rotatably mounted there via a shaft 10 or 2a, at least one latch 2, preferably three mutually offset pivotable latches 2 is or are present.

(20) The latches 2 each have a latch engagement means 2g (see FIG. 12) for the locking ring 14 of the beverage bottle 100, which serves as a rocket body as has been explained.

(21) On a base body 1, not only the flange 7 with the hollow cylinder 8 is fixed, but a rotatably mounted release ring 3; 11 is furthermore present which is under the pretension of a spring 6.

(22) As shown in FIG. 14, the release ring 3 has recesses or setoffs 12. These recesses or setoffs 12 serve for receiving stop ends 2c (see FIG. 12) of the respective latch 2, so that a release of the locking ring 14 of the rocket body 100 may be performed.

(23) According to the representation in accordance with FIGS. 7 and 8, the neck of the rocket body 100, respectively the beverage bottle, is not yet pushed onto the hollow cylinder portion 8.

(24) With the execution of such a push-on movement (see also the procedure in accordance with FIGS. 1 to 6), a lower edge of the bottleneck gets into contact with the respective actuating surface 2f of the respective latch 2.

(25) Hereby, the respective latch performs a pivoting movement about its shaft 10; 2a.

(26) Due to this pivoting movement, the latch engagement means 2g gets into engagement with the locking ring 14 such that the latch engagement means engages behind the locking ring and thus secures the rocket body 100 to the holding and starting device.

(27) Due to the fact that the release ring 3 is under pretension using the spring 6, a rotation takes place by the release of the corresponding recess or setoff 12 due to the pivoting movement of the respective latch. The rotational movement of the release ring 3 is performed in this case such that a final position, as represented in FIG. 4, is reached as a result.

(28) The rotational movement of the release ring 3 is limited by means of a stop 4. The depth of the corresponding recess 12 is selected such that a release ring web 3a remains and the pivoting movement of the latch 2 is unimpeded.

(29) As can be recognized in FIGS. 8, 9, 10 and 11, a channel 17 is located in the bottom area of the hollow cylinder portion 8, which channel receives a safety valve 20. When the starting process is released upon rotation of the release ring against its pretension direction, the safety valve can be opened, so that, when no start has taken place, i.e. when a disengagement of the rocket body 100 from the starting device has not taken place, the present pressure dissipates to the outside via the channel 17 and the opened safety valve. In this respect, the opening side of the valve 20 is in connection with an outlet in the flange 7.

(30) The latches 2 hence have an actuating surface 2f between the point of rotation of the shaft 2a or 10, and the latch engagement means 2g at the upper end of the latch. This actuating surface 2f may be realized as a wedge surface/sloping surface. When the flying object 100 is put or pressed in place, the holding portion 13 gets into contact with the corresponding actuating surfaces 2f of the respective latch 2. This causes a pivoting movement of the latches with the result that the respective latch engagement means 2g engages behind the upper edge of the locking ring 14 (see, for example, FIGS. 2 and 3).

(31) Due to the fact that the release ring 3 is pretensioned in one of its rotational directions by means of the energy accumulator 6, and due to the fact that with the pivoting movement of the latches 2 with their latch engagement means 2g toward the locking protrusion 14, the stop ends 2c of the latches 2 are subjected to a positional change, the respective recesses or setoffs 12 are exited such that the release ring 3; 11 turns into the holding end position (see FIG. 4).

(32) When the release ring 3; 11 is now twisted against the pretension direction (see arrow representations according to FIG. 5), the stop ends 2c of the latches move into the respective recess or setoff 12 so that the latches 2 release the locking ring 14 to start (see FIGS. 5 and 6).

(33) In this respect, the latches 2 are subjected to a pretension in the area between the point of rotation of the shaft 2a and the stop end 2c, i.e. the lower end of the latches 2, toward the center or the middle point of the release ring 3; 11.

(34) The pretension is generated here by means of an elastic ring 5 which can be guided within a corresponding notch 2b of the latch 2 (see FIG. 13). In this respect, the flange, as well, has a groove at its outer circumference which guides the pretension element 5 (see sectional representations according to FIGS. 8 and 11).

(35) A model rocket prepared for starting according to the view in accordance with FIG. 15, in turn takes a flying object 100 in the form of a modified beverage bottle as a basis. The modification here is performed such that, at the head side, a dome 101 acting as an impact attenuator, and, at the nozzle or drive side, a plurality of tail units 102 are attached.

(36) The holding and starting device is located on a board-like base 103.

(37) The board-like base 103 receives a compressed air filling tube 104, and in one configuration, a pressure measuring device 105.

(38) In the representation according to FIG. 15, an actuation of the release ring is performed by using an actuating pin 15.

(39) The actuating pin 15 is in connection with a pull cord 106. The end of the pull cord 106 remote from the actuating pin 15 has a pull button 107.

(40) By pulling the pull button 107, the start may be enabled from a safe distance.

(41) A commercial hand pump 200 serves for the necessary generation of compressed air by connecting the pump to a valve end of the tube 104, which valve end had been modified in this respect.

(42) The starting process is summarized by means of the flow chart according to FIG. 16.

(43) As shown in FIGS. 1 to 3 with reference to elements that are essential in this respect, the rocket body in the form of a beverage bottle 100 is first put on. In doing so, the latches close automatically. Thereafter, a pressure filling is realized while using the hand pump 200. During this process, the latches firmly hold the rocket body 100 (FIG. 4). During a countdown for taking the safety distance, the latches still remain locked and are released with an actuation of the element 107 while using the release ring. This process is illustrated in FIGS. 5 and 6.

(44) If the flying objects 100 gets jammed on the hollow cylinder portion 8, this will lead to an aborted take-off and an automatic pressure relief.

(45) After the rocket's lift-off, a new rocket positioning and a corresponding start preparation may be performed.

(46) According to the exemplary embodiment, the safety valve 20 is opened prior to the latches being released. Since the release ring rotates completely and rapidly up to its stop, only a slight amount of pressurized liquid gets lost by this opening of the safety valve 20. Due to the different cross-sections relative to the relationship of the nozzle-like opening on the flying object, and the dimensions in terms of the safety valve, there is no disadvantage for the actual start process.

(47) For controlling the release process relative to the safety valve 20, the release ring may have a corresponding sloping surface or a stepped surface. By means of such a sloping surface, the rotational movement of the ring can be converted into a translational movement.

(48) In order to prevent a lateral pressure on the tappet of the safety valve known per se, a protective plate or similar means may be provided.

(49) In the exemplary embodiment explained above, and in the Figures, it is assumed that the release ring is located below the axes of rotation of the respective latches 2. Alternatively, there is the general possibility for the release ring to be arranged even above the axes of rotation of the latches.

(50) In a further development of the invention, there is the possibility for a mechanical or electrical switch to be arranged together with a corresponding contact in the area of the latches or the release ring, in order to trigger a time measuring device or another signalizing device with the release of the start process.

(51) In a configuration of the invention, there is the possibility for the closed position of the ring to be modified by a spring-loaded ball in the form of a catch. This results in a noticeable pressure point or a rotation of the release ring toward the corresponding stop when being released, since a breakaway torque needs to be overcome relative to the spring-loaded ball acting as a catch.