After the rockets you launch start flying right and without misfire, the next question that may arise is how to do a salute with your own hands so that the rocket could put a beautiful point in the sky, or many commas or something more interesting. p>
And so, in order to make a salute, you must first determine the weight that your rocket can lift to a sufficient height. To do this, you must have a dynamometer on which you can check the tractive ability of the rocket engine. The easiest way is to use a switch or electronic scale and a video camera (this method will be described separately). It should be said that each rocket has its own weight limits and it depends on the diameter of the engine, the composition of the fuel, and other characteristics. For those missiles that I make, this limit is 300 grams. p>
For work we need some materials and equipment. Some of this is easily accessible, something will have to search. In any case, if you try, then there is everything. p> The list of necessary materials and tools for the manufacture of a 2.5 inch salute ball. A set of necessary materials and tools Cardboard hemispheres 2.5 inches; Time fusion wick; Visco wick (fast); PVC insulating tape. Many will say that it is impossible to strengthen the salyury ball tape. To which I can say that for a 2.5-inch ball is just a matter of taste, and therefore let each one do as he sees fit. It seems to me that festival balls up to 3 inches can be strengthened with Kraft paper, tape with stationery or finally with narrow masking tape, as I said this matter of taste. Granulated black powder;
More necessary for work p> stars; 4.5 mm drill bit; Awl for puncture wick; Wooden plank; Glue gun; Drill or screwdriver (optional). Step 1. Install the time fuse.
In order that the salute would not work ahead of time, it is necessary to calculate the explosion delay in seconds. After it will be clear what the delay should be (I have 2 - 2.5 seconds) measure the necessary amount of wick and insert it into one of the shells of the sphere by drilling a hole in it beforehand. p> With a 4.2 mm drill, we drill a hole in the center of one of the shells. Insert the wick retarder into the drilled hole On the inside we glue the wick retarder to shell
After the time fusion is installed, it must be glued to the hemisphere from the inside. Best of all it will be done with hot glue. p> Step 2. Layout stars and setting a burst charge.
In the salute (festival) balls of 2 and 2.5 inches, you don’t get too excited about laying out a special pattern, so there are some simple options: p> Spread the stars evenly along the inner surface of the hemispheres; make a ring or a cross at the junction of hemispheres; fill the stars interspersed with explosive composition.
In order to scatter the stars as even as possible, it is better to lay them on the inner surface of the hemispheres. p> Star Layouts Schematic drawing of the internal structure of the festival ball Step 3. Connecting the festival ball and its winding.
In order to make the connection of the halves of the festival ball, one of these halves is necessary, namely the top one is wrapped in a napkin. This must be done so that when we put it on the bottom half of the top, gunpowder and stars do not spill out. p> We roll half the ball into a napkin
After that, set the top half to the bottom, while making it so that the edges of the hemispheres coincide. p> Installation of the upper hemisphere of the festival ball
Having connected half of hemispheres we wind the line of connection with an insulating tape in three layers. p> Start the winding process
As a result, after the connection line has been strengthened, it is necessary to wrap the entire ball in at least 4 layers. p>
It should be something like this. p> Festival Balls
That's all for now. Next time I will tell you how to properly glue the ball to the rocket engine. p>
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