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- Home-brew blast cannon by 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 of bellwire
- -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 of the large pipe, the same diameter as
- the small pipe. Thread the hole and one end of the small pipe.
- they should screw together easily.
-
- - Take a piece of scrap metal, and bend it into an "L" shape,
- then attach it to the level on the lighter:
-
- /------------------------gas switch is here
- V
- /------
- !lighter!!<---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 of the smaller tube, one for the
- switch on the bottom, and one for the metal piece on the top.
- Then, mount the switch in the bottom, running the wires up and out
- of the 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 down the
- trigger a bit, let it go, and throw a match in there. If all goes
- well, you should hear a nice big 'THUD!'
-
- - Get a hold of the relay, and take off the top.
-
- 1---------------
- v/
- 2--------------/<--- the center object is the metal finger inside
- 3 the relay
- cc-------------/
- oo----------------4
- ii
- ll----------------5
-
- Connect (1) to one of the wires coming from the switch. Connect
- (2) to (4), and connect (5) to one side of the battery. Connect
- the remaining wire from the switch to the other side of the
- 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 of the large pipe,
- towards the back. Screw on the smaller pipe, tape the battery to
- the side of the cannon barrel (yes, but looks aren't everything!)
-
- - You should now be able to let a little gas into the barrel and
- set it off by flipping the switch.
-
- - Put the cap on the back end of the large pipe VERY SECURELY.
- You are now ready for the 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 down for 30 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! -Jolly Roger-
-
-
-
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