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Modeling a gun

A place to ask general spud cannon related questions.
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Unread postAuthor: chartreusesnot » Thu Jun 14, 2007 12:11 am

Quick question, sorta half relating to this topic, how would you make a sabot for a metal dart? would a plastic bag work? rag? something more complicated that would come off immediately upon exit from the barrel? Also, I was looking at some other supersonic threads, and they mention pulling a vacuum in the barrel, how could this be achieved?
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Unread postAuthor: Modderxtrordanare » Thu Jun 14, 2007 3:44 am

chartreusesnot wrote:Quick question, sorta half relating to this topic, how would you make a sabot for a metal dart? would a plastic bag work? rag? something more complicated that would come off immediately upon exit from the barrel? Also, I was looking at some other supersonic threads, and they mention pulling a vacuum in the barrel, how could this be achieved?


That has nothing to do with this topic actually... But, I'll answer anyways since I really don't see why not, and my question has been answered. :wink:

What I would do, is spray down a section of pipe just like your barrel with Pam non stick spray. Then stick your dart into it and spray some of that "expanding foam" into the pipe to form a foam cylinder with a negative of your dart in it. Cut the foam cylinder in quarters when its fully cured. (24 hours) Re-assemble it so the dart is inside the foam sabot so when you fire the "shell" the foam separates from the dart and the dart goes flying.
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Unread postAuthor: joannaardway » Thu Jun 14, 2007 10:08 am

Unfortunately, I don't really know much how to go about getting hold of helium.

Now, what I do know is that there are companies that will rent you out a big gas bottle full of whatever gas for so much a month, then swap it with a full one for a set fee when you've depleted it.

That's probably your top way of getting any specialist gas.

However, you'll need to research the cost of that in your local area.
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Novacastrian: How about use whatever the heck you can get your hands on?
frankrede: Well then I guess it won't matter when you decide to drink bleach because your out of kool-aid.
...I'm sorry, but that made my year.
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Unread postAuthor: rednecktatertosser » Fri Jun 15, 2007 1:27 pm

Modder, ill take you down to the welding shop so you can look at helium tanks, they sell it as sheilding gas, and next time i see him ill talk to him about doing that welding for you.
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Unread postAuthor: Modderxtrordanare » Fri Jun 15, 2007 1:29 pm

rednecktatertosser wrote:Modder, ill take you down to the welding shop so you can look at helium tanks, they sell it as sheilding gas, and next time i see him ill talk to him about doing that welding for you.


When I get a job. :lol:
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Unread postAuthor: rednecktatertosser » Fri Jun 15, 2007 1:32 pm

hahahaha. you bum. go to the pawn shop and sell something, like a guitar or a lawnmower. :D
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Unread postAuthor: Modderxtrordanare » Fri Jun 15, 2007 1:36 pm

rednecktatertosser wrote:hahahaha. you bum. go to the pawn shop and sell something, like a guitar or a lawnmower. :D


Lawnmower is broken, I plan on melting it down and making cannon balls.
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Unread postAuthor: rednecktatertosser » Fri Jun 15, 2007 1:38 pm

Does the engine not work? cause if so, ill take it off your hands, fix it, and use it to build a go kart.
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Unread postAuthor: joannaardway » Fri Jun 15, 2007 1:57 pm

rednecktatertosser wrote:Does the engine not work? cause if so, ill take it off your hands, fix it, and use it to build a go kart.

Actually, I'm very tempted to try raiding the local tip for a lawnmower and trying that...
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Novacastrian: How about use whatever the heck you can get your hands on?
frankrede: Well then I guess it won't matter when you decide to drink bleach because your out of kool-aid.
...I'm sorry, but that made my year.
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Unread postAuthor: Modderxtrordanare » Fri Jun 15, 2007 1:59 pm

The engine is what I'm melting down.
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