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---FUSE DELAYS
It is extremely simple to delay explosive devices that employ fuses for
ignition.
Perhaps the simplest way to do so is with a cigarette. An average
cigarette burns for between 8-11 minutes. The higher
the "tar" and nicotine
rating, the slower the cigarette burns. Low "tar" and nicotine cigarettes burn
quicker than the
higher "tar" and nicotine cigarettes, but they are also less
likely to go out if left unattended, i.e. not smoked. Depending
on the wind or
draft in a given place, a high "tar" cigarette is better for delaying the
ignition of a fuse, but there
must be enough wind or draft to give the
cigarette enough oxygen to burn. People who use cigarettes for the purpose of
delaying
fuses will often test the cigarettes that they plan to use in advance
to make sure they stay lit and to see how long it
will burn. Once a cigarettes
burn rate is determined, it is a simple matter of carefully putting a hole all
the way
through a cigarette with a toothpick at the point desired, and pushing
the fuse for a device in the hole formed.
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|=| ---------- filter
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|o| ---------- hole for fuse
cigarette ------------| |
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|_| ---------- light this end
---TIMER DELAYS
Timer delays, or "time bombs" are
usually employed by an individual who
wishes to threaten a place with a bomb and demand money to reveal its location
and
means to disarm it. Such a device could be placed in any populated place if
it were concealed properly. There
are several ways to build a timer delay. By
simply using a screw as one contact at the time that detonation is desired,
and
using the hour hand of a clock as the other contact, a simple timer can be made.
The minute hand of a clock should
be removed, unless a delay of less than an
hour is desired.
The main disadvantage with
this type of timer is that it can only be set
for a maximum time of 12 hours. If an electronic timer is used, such
as that
in an electronic clock, then delays of up to 24 hours are possible. By
removing the speaker from an electronic
clock, and attaching the wires of a
squib or igniter to them, a timer with a delay of up to 24 hours can be made.
All
that one has to do is set the alarm time of the clock to the desired time,
connect the leads, and go away. This could
also be done with an electronic
watch, if a larger battery were used, and the current to the speaker of the
watch was
stepped up via a transformer. This would be good, since such a
timer could be extremely small.
The timer in
a VCR (Video Cassette Recorder) would be ideal. VCR's can
usually be set for times of up to a week. The leads
from the timer to the
recording equipment would be the ones that an igniter or squib would be
connected to. Also,
one can buy timers from electronics stores that would be
work well. Finally, one could employ a digital watch, and
use a relay, or
electro-magnetic switch to fire the igniter, and the current of the watch
would not have to be stepped
up.
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