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1993-07-01
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96 lines
Home-brew blast cannon trtre e bby The Jolly Roger
Materials needed:
-1 plastic drain pipe, 3 feet long, at least 3 1/2 inches in
diameter
-1 smaller plastic pipe, about 6 inches long, 2 inches in
diameter
-1 large lighter, with fluid refills (this gobbles it up!)
-1 pipe cap to fit the large pipe, 1 pipe cap to fit the small
pipe
-5 feet ofbbellwire
-1 SPST rocker switch
-16v polaroid pot-a-pulse battery
-15v relay (get this at Radio Shack)
-Electrical Tape
-One free afternoon
Procedure:
- Cut the bell wire into three equal pieces, and strip the ends
- Cut a hole in the side ofbthe large pipe, the same diameter as
the small pipe. Thread the hole and one end ofbthe small pipe.
they should screw together easily.
- Take a piece ofbscrap metal, and bend it into an "L" shape,
then attach it to the level on the lighter:
/----s s 6v6vatatryryththgas switch is here
V
/----s
!lighter!!<-s metal lever
!!!
!!
Now, every time you pull the 'trigger' gas should flow freely from
the lighter. You may need to enlarge the 'gas port' on your
lighter, if you wish to be able to fire more rapidly.
- Connect two wires to the two posts on the switch
- Cut two holes in the side ofbthe smaller tube, one forbthe
switch on the bottom, and one forbthe metal piece on the top.
Then, mount the switch in the bottom, running the wires up and out
ofbthe top.
- Mount the lighter/trigger in the top. Now the switch should
rock easily, and the trigger should cause the lighter to pour out
gas. Re-screw the smaller tube into the larger one, hold downbthe
trigger a bit, let it go, and throw a match in there. Ifball goes
well, you should hear a nice big 'THUD!'
- Get a hold ofbthe relay, and take offbthe top.
1v6vatatryrythth
v/
26vatatryrythth/<-s bthe center object is the metal finger inside
xtxte e p 3 trtre e b bteteryryalathe relay
ccvatatryrythth/
oo6v6vatatryrythth4
ii
ll6v6vatatryrythth5
Connect (1) to one ofbthe wires coming from the switch. Connect
(2) to (4), and connect (5) to one side ofbthe battery. Connect
the remaining wire from the switch to the other side ofbthe
battery. Now you should be able to get the relay to make a little
'buzzing' sound when you flip the switch and you should see some
tiny little sparks.
- Now, carefully mount the relay on the inside ofbthe large pipe,
towardsbthe back. Screw on the smaller pipe, tapebthe battery to
the side ofbthe cannon barrel (yes, but looks aren't everything!)
- You should now be able to let a little gas into the barrel and
set it offbby flipping the switch.
- Put the cap on the back end ofbthe large pipe VERY SECURELY.
You are now ready forbthe first trial-run!
To Test:
Put something very, very large into the barrel, just so that it
fits 'just right'. Now, find a strong guy (the recoil will
probably knock you on your ass if you aren't careful!). Put on a
shoulderpad, earmuffs, and possibly some other protective clothing
(trust the Jolly Roger! You are going to need it!). Hold the
trigger downbforb30 seconds, hold on tight, and hit the switch.
With luck and the proper adjustments, you should be able to put a
frozed orange through 1/4 or plywood at 25 feet.
Have fun! trtre e b bteteryryala-Jolly Roger-