MAKE A DETONATOR

To understand what is a detonator you have to understand that there are two explosives. Low explosive that expands slowly like gun powder can be ignited by a flame or fuse. High Explosives include fast expanding charges like C4, TNT and Plastic Explosives. High explosives have to be set off by a detonator or a blasting cap. In such a case the detonator is considered as the Primary explosive and the High Explosive as the Secondary explosive.

Detonators can be electrical, mechanical, chemical or fused. This article will delve into electrical and fused detonators.

Detonators work by releasing an immense amount of heat, pressure and friction at high velocities in a confined place. All these characteristics are obligatory for an effective detonator. There are very few chemicals that exhibit all of the above when ignited by a direct flame one of which is mercury fulminate. A few detonators are a complete system in one, i.e they are composed of primary and secondary charges so as to gain more effective detonation properties, however detonators are not always better because they are more powerful.

Where should a detonator be placed in a charge ? To direct the explosion into one smaller area the explosive would have to be confined in a cone of hard material. The detonator is placed in the peak of the cone and the open peak covered with clay. The direction of the explosion will be towards the larger open end of the cone.

There are three main types of detonators available. J1, #8 and a compound detonator.

#8 blasting cap
Materials required are a 10 inch waterproof fuse, a spent 223 cartridge, smokeless gunpowder from a pistol cartridge, mercury fulminate powder, sulphur, Potassium Chlorate powder. The last two are optional.

Combine 1 part Pottassium Chlorate with 1/8 part sulphur. This is mix 1. Mix one part mercury fulminate with 1/2 part mix1. This is the final mix. Fill the 223 shell half full of smokeless gunpowder. Fill the rest of it with the final mix. Put the fuse in the shell and close it off with water resistant glue. This is a #8 detonator which can be ignited by flame.

J1 Detonator
Materials required are a 12 inch waterproof fuse, a spent 223 cartridge, smokeless gunpowder from a pistol cartridge, mercury fulminate powder, sulphur, Potassium Chlorate powder.

Combine 1 part Pottassium Chlorate with 1/8 part sulphur. This is mix 1. Mix 2 part mercury fulminate with 1/2 part mix1. This is the final mix. Fill the 223 shell to the rim with final mix and the rest of the shell should be filled with smokeless powder. Place the fuse in the 223 shell, pinch and glue.

Compound detonators
Compound detonars are very useful in a situation with negative enviromental factors such as dust, rain, heat and cold. These detonars are a sure way of being sure the charge goes off.

Materials required are 15 inch fuse, Mercury Fulminate, smokeless powder, Pottassium Chlorate and a spent 30 06 shell.

Mix 1 part mercury fulminate with 1/8 part Potassium chlorate, this is mix 1. Mix 1 part mix1 with 1/8 part smokeless powder. This is the final mix. Put the final mix in the shell. Insert the fuse, pinch and seal.

Electric detonator
To convert any of the above detonators into an electric detonator an electric ignitor as used for rocket engines is used. This can be found at hobby stores. The ignitor can be inserted instead of a fuse and sealed but not pinched in the shell.

WARNING:

This device is extremely dangerous and should not be attempted.

This article is provided for information purposes only.

source:

  1. http://www.postalmuseum.si.edu/images/exhibits/2c1d_3_detonator2.jpg
  2. http://infinitylabs.net/wp-content/uploads/2006/06/695cf8be814dbeb6ec086ce5.medium.jpg
  3. http://content.answers.com/main/content/wp/en-commons/thumb/f/f5/300px-Exploding_bridgewire_detonator.png

~ oleh kelanamuda pada 15 Juli, 2007.

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