96 lines
3.3 KiB
Plaintext
96 lines
3.3 KiB
Plaintext
Home-brew blast cannon by The Jolly Roger
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Materials needed:
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-1 plastic drain pipe, 3 feet long, at least 3 1/2 inches in
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diameter
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-1 smaller plastic pipe, about 6 inches long, 2 inches in
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diameter
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-1 large lighter, with fluid refills (this gobbles it up!)
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-1 pipe cap to fit the large pipe, 1 pipe cap to fit the small
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pipe
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-5 feet of bellwire
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-1 SPST rocker switch
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-16v polaroid pot-a-pulse battery
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-15v relay (get this at Radio Shack)
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-Electrical Tape
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-One free afternoon
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Procedure:
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- Cut the bell wire into three equal pieces, and strip the ends
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- Cut a hole in the side of the large pipe, the same diameter as
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the small pipe. Thread the hole and one end of the small pipe.
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they should screw together easily.
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- Take a piece of scrap metal, and bend it into an "L" shape,
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then attach it to the level on the lighter:
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/------------------------gas switch is here
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V
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/------
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!lighter!!<---metal lever
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!!!
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!!
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Now, every time you pull the 'trigger' gas should flow freely from
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the lighter. You may need to enlarge the 'gas port' on your
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lighter, if you wish to be able to fire more rapidly.
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- Connect two wires to the two posts on the switch
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- Cut two holes in the side of the smaller tube, one for the
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switch on the bottom, and one for the metal piece on the top.
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Then, mount the switch in the bottom, running the wires up and out
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of the top.
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- Mount the lighter/trigger in the top. Now the switch should
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rock easily, and the trigger should cause the lighter to pour out
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gas. Re-screw the smaller tube into the larger one, hold down the
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trigger a bit, let it go, and throw a match in there. If all goes
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well, you should hear a nice big 'THUD!'
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- Get a hold of the relay, and take off the top.
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1---------------
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v/
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2--------------/<--- the center object is the metal finger inside
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3 the relay
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cc-------------/
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oo----------------4
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ii
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ll----------------5
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Connect (1) to one of the wires coming from the switch. Connect
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(2) to (4), and connect (5) to one side of the battery. Connect
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the remaining wire from the switch to the other side of the
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battery. Now you should be able to get the relay to make a little
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'buzzing' sound when you flip the switch and you should see some
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tiny little sparks.
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- Now, carefully mount the relay on the inside of the large pipe,
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towards the back. Screw on the smaller pipe, tape the battery to
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the side of the cannon barrel (yes, but looks aren't everything!)
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- You should now be able to let a little gas into the barrel and
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set it off by flipping the switch.
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- Put the cap on the back end of the large pipe VERY SECURELY.
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You are now ready for the first trial-run!
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To Test:
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Put something very, very large into the barrel, just so that it
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fits 'just right'. Now, find a strong guy (the recoil will
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probably knock you on your ass if you aren't careful!). Put on a
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shoulderpad, earmuffs, and possibly some other protective clothing
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(trust the Jolly Roger! You are going to need it!). Hold the
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trigger down for 30 seconds, hold on tight, and hit the switch.
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With luck and the proper adjustments, you should be able to put a
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frozed orange through 1/4 or plywood at 25 feet.
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Have fun! -Jolly Roger-
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