For a novice rocket scientist (even if the rocket is made of cardboard), it is not a problem to calculate the area of the stabilizers and the length of the rocket, because this is not difficult at all. The main problem in making rockets is the engine. Today we are going to talk about making a durable motor out of cardboard and paper.
It is necessary
- Thick cardboard
- PVA glue
- Wooden block
- Woodworking tools
It should be said right away that all engine sizes will depend on the parameters of your specific rocket. For someone it may be wider, for someone it is narrower, so it can be with length. Therefore, we will give the basis for the technology of manufacturing an engine for a rocket, and you will determine the dimensions for yourself. All you need is PVA glue and cardboard. The exception is the nozzle, but we will consider it separately.
So, first you need to determine how wide your rocket will be. Based on this value, we will determine the width of the engine itself. We advise you not to make the rocket body before the engine is made. Because it will not be possible to know exactly the width of the engine in advance, and it will be impossible to install a wider engine in the finished body without changing the design of the rocket body.
Simply put, define the minimum width for the rocket. Then figure out how long the future engine should be.
Cut a strip of cardboard, the length of which should be equal to several girths of the future rocket body according to the minimum width. It is desirable that the length of the cut strip allows making a tube with walls from three to four layers of cardboard. You can, of course, more, but this will make the structure heavier.
Apply glue to the strip and start rolling it into a tube. Make sure that the layers of cardboard are closest to each other - this will give a stronger wall to the engine when the glue dries and hardens.
Having made the base of the engine body, you can already take measurements from it and get the real width for the future rocket. You will also know what diameter to take for making a nozzle.
Next, you need to make a plug. There are two options - either cut out a wooden round in the diameter of the engine and glue it into the tube, or make a round out of paper. If everything is clear with the tree, then the plug is made of paper in the same way as a cardboard tube. Take plain paper and cut a strip of width equal to the width of the future plug.
Coat the resulting strip of paper with glue and gently roll it up like a scroll. The layers should fit together as tightly as possible. After the glue dries, the resulting washer will not be inferior in strength to wood.
Glue a paper washer or wooden round into the cardboard box on either side. The engine is almost ready.
Now the nozzle should be made. The easiest way is to take a wooden washer of the appropriate diameter and process it in such a way as to obtain a section similar to that shown in the figure.
It remains only to glue the nozzle, after which it will be possible to fill in the powder and install the wick. It also happens that for better ignition of fuel, a cavity is created in the center in which the wick will be located. Because with the nozzle installed, it will be problematic to do this, you can make a hole in the mass of gunpowder in advance, and then carefully glue the nozzle itself.