4.41 PAPER CONTAINERS
Paper was the first container ever used for explosives, since it was
first used by the Chinese to make fireworks. Paper containers are usually very
simple to make, and are certainly the cheapest. There are many possible uses
for paper in containing explosives, and the two most obvious are in firecrackers
and rocket engines. Simply by rolling up a long sheet of paper, and gluing it
together, one can make a simple rocket engine. Perhaps a more interesting and
dangerous use is in the firecracker. The firecracker shown here is one of
Mexican design. It is called a "polumna", meaning "dove". The process of their
manufacture is not unlike that of making a paper football. If one takes a sheet
of paper about 16 inches in length by 1.5 inches wide, and fold one corner so
that it looks like this:
________________________________________________________
| |\
| | \
| | \
|______________________________________________________|___\
and then fold it again so that it looks like this:
_______________________________________________________
| /|
| / |
| / |
|__________________________________________________/___|
A pocket is formed. This pocket can be filled with black powder, pyrodex,
flash powder, gunpowder,rocket engine powder, or any of the quick-burning fuel-
oxodizer mixtures that occur in the form of a fine powder. A fuse is then
inserted, and one continues the triangular folds, being careful not to spill
out any of the explosive. When the polumna is finished, it should be taped
together very tightly, since this will increase the strength of the container,
and produce a louder and more powerful explosion when it is lit. The finished
polumna should look like a 1/4 inch - 1/3 inch thick triangle, like the one
shown below:
^
/ \ ----- securely tape all corners
/ \
/ \
/ \
/ \
/ \____________________________
/_____________\__/__/__/__/__/__/__/__/__/ ---------- fuse
_________ _______________ __________
| | ^^^^^^ ^^^^^^ | |
| |vvvvv| |_________________________| |vvvvvv| |
| | | |
| | | |
| | | |
| | | |
| | ___________________________ | |
| | | | | |
| |^^^^^| vvvvvv_______________vvvvvv |^^^^^^| |
|_______| |________|
fig 1. Threaded pipe and endcaps.
________ ________
| _____|________________________________|_____ |
| |__________________________________________| |
| |: : : : |- - - - - - - - - - - - - - - - -| |
| | tissue | - - - - - - - - - - - - - - - - |_|
| | : : : |- - - low order explosive - - ----------------------
| | paper | - - - - - - - - - - - - - - - - |-| fuse
| |: : : : |- - - - - - - - - - - - - - - - -| |
| |________|_________________________________| |
| |__________________________________________| |
|______| |______|
endcap pipe endcap
w/ hole
fig. 2 Assembled pipe bomb.This is one possible design that a mad bomber would use. If, however, he did not have access to threaded pipe with endcaps, he could always use a piece of copper or aluminum pipe, since it is easily bent into a suitable position. A major problem with copper piping, however, is bending and folding it without tearing it; if too much force is used when folding and bending copper pipe, it will split along the fold. The safest method for making a pipe bomb out of copper or aluminum pipe is similar to the method with pipe and endcaps. First, one flattens one end of a copper or aluminum pipe carefully, making sure not to tear or rip the piping. Then, the flat end of the pipe should be folded over at least once, if this does not rip the pipe. A fuse hole should be drilled in the pipe near the now closed end, and the fuse should be inserted. Next, the bomb-builder would fill the bomb with a low order explosive, and pack it with a large wad of tissue paper. He would then flatten and fold the other end of the pipe with a pair of pliers. If he was not too dumb, he would do this slowly, since the process of folding and bending metal gives off heat, which could set off the explosive. A diagram is presented below:
________
_______________________________________________/ |
| |
| o |
|______________________________________________ |
\_______|
fig. 1 pipe with one end flattened and fuse hole drilled (top view)
______
____________________________________________/ | |
| | |
| o | |
|___________________________________________ | |
\__|__|
fig. 2 pipe with one end flattened and folded up (top view)
____________ fuse hole
|
v
_________________________________________________
| \ |____ |
| \____| |
| ______|
| /
|_____________________________/__________________
fig. 3 pipe with flattened and folded end (side view)
_________________ fuse
/
|
________ ______________________________|___ _______
| ____| / |- - - - - - - - - - -| - - \ |___ |
| |_____/tissue| - - - - - - - - - - - -|- - \_____| |
|________ paper |- - - low order explosive - _______|
\ | - - - - - - - - - - - - - - /
\_____________________________________/
fig. 4 completed bomb, showing tissue paper packing and explosive (side view)A CO2 cartridge from a B.B gun is another excellent container for a low-order explosive. It has one minor disadvantage: it is time consuming to fill. But this can be rectified by widening the opening of the cartridge with a pointed tool. Then, all that would have to be done is to fill the CO2 cartridge with any low-order explosive, or any of the fast burning fuel- oxodizer mixtures, and insert a fuse. These devices are commonly called "crater makers".
A CO2 cartridge also works well as a container for a thermit incendiary device, but it must be modified. The opening in the end must be widened, so that the ignition mixture, such as powdered magnesium, does not explode. The fuse will ignite the powdered magnesium, which, in turn, would ignite the thermit.
The previously mentioned designs for explosive devices are fine for low-order explosives, but are unsuitable for high-order explosives, since the latter requires a shockwave to be detonated. A design employing a smaller low-order explosive device inside a larger device containing a high-order explosive would probably be used. It would look something like:
_______________________ fuse
|
|
|
_________ | _________
| ____|__________________________|___________|____ |
| | * * * * * * * * * * * * * * *|* * * * * * * | |
| | * * * * * * high explosive | * * * * * * * | |
| | * * * * * * * * * * * * * * *|* * * * * * * | |
| | * ______ _______________|_ ______ * | |
| | * * | __| / - - - - - - | \ |__ | * | |
| | * | |____/ low explosive - \____| | * | |
| | * * |_______ - - - - - - - - - _______| * | |
| | * * * * * \ - - - - - - - - / * * * * * | |
| | * * * * * * \_________________/ * * * * * | |
| | * * * * * * * * * * * * * * * * * * * * * * | |
| | * * * * * * * * * * * * * * * * * * * * * * | |
| | * * * * * * * * * * * * * * * * * * * * * * | |
| |______________________________________________| |
|_______| |_______|
If the large high explosive container is small, such as a CO2 cartridge,
then a segment of a hollow radio antenna can be made into a low-order pipe bomb,
which can be fitted with a fuse, and inserted into the CO2 cartridge.
4.43 GLASS CONTAINERS
Glass containers can be suitable for low-order explosives, but there
are problems with them. First, a glass container can be broken relatively
easily compared to metal or plastic containers. Secondly, in the
not-too-unlikely event of an "accident", the person making the device would
probably be seriously injured, even if the device was small. A bomb made out of
a sample perfume bottle-sized container exploded in the hands of one boy, and he
still has pieces of glass in his hand. He is also missing the final segment of
his ring finger, which was cut off by a sharp piece of flying glass...
Nonetheless, glass containers such as perfume bottles can be used by a demented individual, since such a device would not be detected by metal detectors in an airport or other public place. All that need be done is fill the container, and drill a hole in the plastic cap that the fuse fits tightly in, and screw the cap-fuse assembly on.
________________________ fuse
|
|
|
_____|_____
| ___|___ |
| > | < | drill hole in cap, and insert fuse;
| > | < | be sure fuse will not come out of cap
| > | < |
| | |
| |
| |
| | screw cap on bottle
| |
| |
V V
_________
< >
< >
< >
/ \
/ \
/ \
| | fill bottle with low-order explosive
| |
| |
| |
| |
|___________|
Large explosive devices made from glass containers are not practicle,
since glass is not an exceptionally strong container. Much of the explosive
that is used to fill the container is wasted if the container is much larger
than a 16 oz. soda bottle. Also, glass containers are usually unsuitable for
high explosive devices, since a glass container would probably not withstand
the explosion of the initiator; it would shatter before the high explosive was
able to detonate.
4.44 PLASTIC CONTAINERS
Plastic containers are perhaps the best containers for explosives, since
they can be any size or shape, and are not fragile like glass. Plastic piping
can be bought at hardware or plumbing stores, and a device much like the ones
used for metal containers can be made. The high-order version works well with
plastic piping. If the entire device is made out of plastic, it is not
detectable by metal detectors. Plastic containers can usually be shaped by
heating the container, and bending it at the appropriate place. They can be
glued closed with epoxy or other cement for plastics. Epoxy alone can be used
as an endcap, if a wad of tissue paper is placed in the piping. Epoxy with a
drying agent works best in this type of device.
|| ||
|| ||
||\_____________/||
|| ||
|| epoxy ||
||_______________||
|| ||
|| tissue ||
|| paper ||
||_______________||
||***************||
||***************||
||***************||
||***************||
||** explosive **||
||***************||
||***********----------------------- fuse
||***************||
||---------------||
|| ||
|| tissue ||
|| paper ||
||_______________||
|| ||
|| epoxy ||
|| _____________ ||
||/ \||
|| ||
|| ||
One end must be made first, and be allowed to dry completely before the
device can be filled with powder and fused. Then, with another piece of tissue
paper, pack the powder tightly, and cover it with plenty of epoxy. PVC pipe
works well for this type of device, but it cannot be used if the pipe had an
inside diameter greater than 3/4 of an inch. Other plastic puttys can be used
int this type of device, but epoxy with a drying agent works best.
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