Post by T. Wedd on Jul 9, 2003 4:49:32 GMT -5
In the past, many people have experimented with the power generated by the
conversion of dry ice into gaseous carbon dioxide. The most common use that I
have seen is the dry ice bomb. The dry ice bomb is easily made by using a two
liter plastic bottle, some hot water and some crushed dry ice. To make one, one
simply puts about a cup and a half of crushed dry ice into the bottle, adds hot
water, caps the bottle and throws it. These bombs are not a joke, and have been
known to blow a metal trash can fifteen feet into the air, as well as bursting
the bottom of the can. If you make a dry ice bomb, you had best throw it before
it explodes due to the enormous force generated by the explosion of the bottle.
A friend of mine waited a bit too long on throwing one, and he jammed three of
his fingers badly, got a huge bruise on his left leg, and one of the plasic
fragments was propelled with enough force to puncture his tennis shoes and cut
his foot all to hell. In short, be careful with these things.
An idea was introduced to me by a friend. His plan
was to control the force of the expanding dry ice and harness it to a useful
end. The result was the dry ice gun. In following these plans, please keep in
mind that when dry ice is finished expanding, it can generate pressures of up to
2400 PSI...for this reason, I recommend that when arming the gun and when
disarming it, you hold all valves OPEN, and that you wear a pair of protective
goggles at all times. I will take no responsibility for injury that occurs
because of the content of this file, or through the use of this information.
This information is intended for educational purposes ONLY.
Materials needed:
----------------
The materials required will vary for each gun produced because of the nature
of the construction itself and the effect produced by using different parts.
The following parts, however, are necessary for a gun with moderate power and
range:
1- Standard valve. I recommend the kind that is just a lever and turns 1/4
turn to open or close and has 3/4" connectors.
1- Blow gun (These can be found at auto parts stores... shop around a little
and get one with the highest pressure rating you can find (probably 150 PSI)).
This will be sometimes referred to as a valve also.
1- Length of hot water PVC piping...this will be used for the barrel. I
recommend that you use 3/4" piping, because that is the kind that fits paint
pellets of the type used in KILLER best. Note, however, that it is possible to
launch anything up to the size of an egg with pleasing results, provided that
the barrel is large enough in diameter.
You will also need various lengths of regular lead or steel piping (to
construct the actual gun), and adapters to get the blow gun to fit the rest of
the gun (blow guns usually have connectors that are 1/4" in diameter, while the
rest of the gun (except the dry ice container) should be constructed with 3/4"
fittings). You will also need an end cap to go on the end of your dry ice
container and probably an elbow joint.
Optional parts:
--------------
1- Standard valve (same kind as above, but with a shorter lever).
1- "T" joint with 3/4" connectors all around.
1- 6 or 7 inch length of 3/4" diameter pipe.
1- 3/4" end cap.
Form-a-gasket and pipe dope
Construction:
------------
Because of the nature of the gun, step-by-step plans are not possible.
However, a diagram of the gun will give you an idea of what has to be done, and
construction tips should prove enough to allow successful completion of the
project.
Diagram:
NOTES:
1- The dry ice container can be any size...the one I use is about 6 inches
long by 2 inches in diameter. The larger the chamber is, the more shots the gun
will fire before reloading is necessary.
2- The elbow joint can be left out...it will only make the gun in the shape of
a straight rod rather than a "traditional" gun shape.
conversion of dry ice into gaseous carbon dioxide. The most common use that I
have seen is the dry ice bomb. The dry ice bomb is easily made by using a two
liter plastic bottle, some hot water and some crushed dry ice. To make one, one
simply puts about a cup and a half of crushed dry ice into the bottle, adds hot
water, caps the bottle and throws it. These bombs are not a joke, and have been
known to blow a metal trash can fifteen feet into the air, as well as bursting
the bottom of the can. If you make a dry ice bomb, you had best throw it before
it explodes due to the enormous force generated by the explosion of the bottle.
A friend of mine waited a bit too long on throwing one, and he jammed three of
his fingers badly, got a huge bruise on his left leg, and one of the plasic
fragments was propelled with enough force to puncture his tennis shoes and cut
his foot all to hell. In short, be careful with these things.
An idea was introduced to me by a friend. His plan
was to control the force of the expanding dry ice and harness it to a useful
end. The result was the dry ice gun. In following these plans, please keep in
mind that when dry ice is finished expanding, it can generate pressures of up to
2400 PSI...for this reason, I recommend that when arming the gun and when
disarming it, you hold all valves OPEN, and that you wear a pair of protective
goggles at all times. I will take no responsibility for injury that occurs
because of the content of this file, or through the use of this information.
This information is intended for educational purposes ONLY.
Materials needed:
----------------
The materials required will vary for each gun produced because of the nature
of the construction itself and the effect produced by using different parts.
The following parts, however, are necessary for a gun with moderate power and
range:
1- Standard valve. I recommend the kind that is just a lever and turns 1/4
turn to open or close and has 3/4" connectors.
1- Blow gun (These can be found at auto parts stores... shop around a little
and get one with the highest pressure rating you can find (probably 150 PSI)).
This will be sometimes referred to as a valve also.
1- Length of hot water PVC piping...this will be used for the barrel. I
recommend that you use 3/4" piping, because that is the kind that fits paint
pellets of the type used in KILLER best. Note, however, that it is possible to
launch anything up to the size of an egg with pleasing results, provided that
the barrel is large enough in diameter.
You will also need various lengths of regular lead or steel piping (to
construct the actual gun), and adapters to get the blow gun to fit the rest of
the gun (blow guns usually have connectors that are 1/4" in diameter, while the
rest of the gun (except the dry ice container) should be constructed with 3/4"
fittings). You will also need an end cap to go on the end of your dry ice
container and probably an elbow joint.
Optional parts:
--------------
1- Standard valve (same kind as above, but with a shorter lever).
1- "T" joint with 3/4" connectors all around.
1- 6 or 7 inch length of 3/4" diameter pipe.
1- 3/4" end cap.
Form-a-gasket and pipe dope
Construction:
------------
Because of the nature of the gun, step-by-step plans are not possible.
However, a diagram of the gun will give you an idea of what has to be done, and
construction tips should prove enough to allow successful completion of the
project.
Diagram:
-------
trigger (part of the blow gun) standard
adaptor______________ : valve
\ : \
: : :
______________________ : _ ; _____:______ __________
! !\__ __!__________________________________/ \
! barrel ! __!__!__! ! O ! \ !
!______________________!/ joint B____________/: _____________ !
blow gun_____________/ : : I / \ \ \__________!
pressure chamber________/ : I / !_____!<-joint A
adaptor____________________/ / ! !
elbow joint________________________/ /! !
dry ice container_____________________/ ! !
end cap_______________________________ _!_____!_
\!! !!
+-------+
NOTES:
1- The dry ice container can be any size...the one I use is about 6 inches
long by 2 inches in diameter. The larger the chamber is, the more shots the gun
will fire before reloading is necessary.
2- The elbow joint can be left out...it will only make the gun in the shape of
a straight rod rather than a "traditional" gun shape.
