Air-hydraulic rocket. Drawing, description

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Air-hydraulic rocket. Tips for a modeler

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We will talk about an experimental two-stage air-hydraulic rocket model. The principle of its operation was developed by a group of authors (V, I. Kostyukov, V. E. Grushko, etc.), who received a copyright certificate for it. Try to test their idea.

In the figure you can see how the model is arranged.

Air-hydraulic rocket

It consists of two hollow steps-sections 3 and 4, separated by a membrane 8 made of an elastic material.

In the lower section 3 there is a nozzle 10 - in flight, a water jet is ejected through it. The nozzle 7 of the upper stage in the starting position is closed by the protrusion of the membrane 8. Holes 9 are made in the head part of the lower stage - air passes through them to the membrane. It is pumped into the hollow sections of the model through nipples 2 and 5. The model, ready for launch, is installed on the launch platform, which consists of base 1, grippers 12, protrusion 11 and trigger lever 13.

Now about how the model is refueled with fuel - water and air. A membrane 3 is installed on the head part of stage 8. Then, through the nozzle 10, using a funnel, it is charged with water - about one third of the capacity - the lower stage 3. The protrusion 11 of the starting platform is inserted into the nozzle of the section filled with water.

Then the upper section 4 is filled with water. After that, it is mounted with a shank on the head of the lower section so that the protrusion of the membrane closes the nozzle 7.

Then, through the nipples 2 and 5, air is pumped into the sections with a bicycle pump. The pressure is selected experimentally, and the number of strokes for the upper stage should be slightly less - by two or three. The model is ready for launch. Now you can press the trigger lever 13, the grips 12 will release the model, and it will take off - due to the jet ejection of water from the lower stage. After the first stage has completed, the second one starts. This happens due to the fact that the pressure in the empty stage decreases and the elastic membrane, due to the excess pressure in the upper section, bending slightly opens the nozzle 7. As a result, water from the upper section flows into the sealed cavity between the stages and presses on the head of section 3 The stages are separated, and each continues its flight independently: one falls to the ground, the other flies further.

We have considered only the fundamental structure of the model.

The dimensions and manufacturing technology of the model can be different: it all depends on the experience of the modeler and his technical capabilities. Try to do it, write to the editor about the results.

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