How to make a petard

So, what is a firecracker?

This is a cartridge case filled with an explosive mixture. When ignited, it produces a certain amount of light, accompanied by noise. Its intensity depends on the filling of the device.

Types of firecrackers

1. 
   Tirochnye


2. 
   Wick

Tekrovye work on the principle of a matchbox. On one of their sides is a phosphoric mixture, which, when rubbed, ignites.

The wicks are equipped with a small cord (2 centimeters). This kind is safer with respect to the former, since the cord serves as a moderator of the reaction.

Making firecrackers

Of course there are a lot of varieties of preparing pyrotechnic mixtures. But we will describe the most widely used.

Components:

• 
  a metal tube or a piece of an antenna (for example, from a radio)


• 
  Matchbox


• 
  rubber or eraser


• 
  plastic bag or paper


• 
  thick wire


• 
  thread

Auxiliary tools:

• 
  nail


• 
  pliers


• 
  a hammer

Manufacture:

We take a piece of antenna about six centimeters long. One side is bent by pliers, just like a tube with toothpaste is folded. The second side is left open.

Next, cut off a small piece of eraser and push it with a stud to the very bottom.

Now we are starting to match. We need only the heads, but a layer of Berthollet salt with impurities is applied. They can be cleaned with pliers, pliers or beat on the box from the side of the heads with a hammer.

Then grind the resulting powder in a mortar.

For the filling, the wire can not be taken, but if you still add it, be especially careful when igniting. We bite her pliers into small pieces.

We mix sulfur and metal dust, densely we ram the nail into the tube. The better to compact, the louder the charge is. Leave some space for the second piece of eraser.

Push the eraser, bend the second end of the tube in the same way as the first.

We wrap our product with polyethylene or paper and go to the unsociable place.

We set fire to the parcel and quickly run off somewhere beyond the fence or the wall. As a result of heating, our mixture must be thoroughly beaten.

Manganese bomb

Ingredients:

• 
  manganese


• 
  magnesium


• 
  thin cardboard


• 
  matches


• 
  thread

Auxiliary means:

• 
  a hammer


• 
  pencil


• 
  file


• 
  pliers

Manufacturing

First, crush magnesium to a fine chip with a file, then mix magnesium and manganese in a ratio of two parts of magnesium to one part of manganese. We add sulfur there with five matches.

Then take a pencil and cardboard. For as long as you have enough strength, wrap it, then draw a pencil. We tie one side tightly with threads or tape. We fall asleep a mix, we compact, we twist and we also tie it.

Make a hole in the middle of the fold (2 mm),pour in there still berlotetovoy salt (with five matches). We fasten three matches in a row, so that one of the heads is snug against the hole, and we stick it with adhesive tape or threads.

We leave on street, we set fire to the most extreme match and at once we throw as far as possible.

The mixture for this firecracker can be changed. For example, mix potassium nitrate, magnesium and manganese in a ratio of 5: 2: 5 or without manganese: bertholets salt, magnesium, potassium nitrate (1: 5: 2).

Still I want to say that it's prettyA dangerous kind of entertainment. Also it will require you time, patience and attentiveness in the manufacture. If you have never made firecrackers, ask for help and advice from an experienced person who can boast that he has never hurt himself. Or buy the finished product in the store. It should be understood that manufacturers are also different. In general, remember that your safety is the most important thing!