Travel Combustion

Just build a cannon and want to show it off? Post it in here.

Postby sgort87 » Wed Feb 14, 2007 12:36 am

I was inspired by DR's chain of little theme launchers that he's got to come up with something new and kinda useful. I thought it would be cool to have a simple combustion that was fairly light and compact. Collapsibility was the answer. I don't know when I'll use it but, well, I can.

It's got a 24" 1.5" SDR 21 barrel for golf balls and I lathed the tip for spud cutting. The ratio comes to about 1.6:1. The gun's got a lantern sparker ignition and I plan to use butane but I still have to figure out how to use the damn stuff. :D

It collapses by threading and unthreading the barrel. I lathed out some 1.5x2" thread x thread PVC bushings to slide over 1.5" pipe and cemented them on. The tip of the chamber has two female adapters facing opposite lathed to fit. The barrel also has a slip cap for storing the fuel and some golf balls in it.

So here's a few pictures and a video of the collapsing.

<center><a href="http://www.spudfiles.com/uploader/uploadFiles/travel1.JPG"><img src="http://www.spudfiles.com/uploader/uploadFiles/travel1s.JPG"></a>
<a href="http://www.spudfiles.com/uploader/uploadFiles/travel2.JPG"><img src="http://www.spudfiles.com/uploader/uploadFiles/travel2s.JPG"></a><a href="http://www.spudfiles.com/uploader/uploadFiles/travel3.JPG"><img src="http://www.spudfiles.com/uploader/uploadFiles/travel3s.JPG"></a>

<a href="http://media.putfile.com/TravelGun"><font size=3><b>Video</b></font></a>
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Postby frankrede » Wed Feb 14, 2007 12:43 am

I like it, how is it performance wise?
Small with a punch?
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Postby sgort87 » Wed Feb 14, 2007 12:46 am

I wouldn't know. I haven't tried it yet. :D

I just finished it tonight and figured why not post it. Maybe I'll test it in the workshop tomorrow night.
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Postby BewareOfDog » Wed Feb 14, 2007 1:14 am

I <i>think</i> I understand how you made it... but could post a cut-away diagram of what you did?

It's cool that I inspired you to do something different!- Thx.
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Postby Mr.Plow » Wed Feb 14, 2007 1:23 am

Nice little launcher there, Gort! Gives me an idea for a combustion... neat:D
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Postby Velocity » Wed Feb 14, 2007 11:24 am

Very nice work! In the collapsed state, could it function like a coaxial?
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Postby sgort87 » Wed Feb 14, 2007 1:52 pm

Here's a diagram for you DR. The blue section is two opposite facing female cleanout adapters. The male "threaded rings" I made thread into those. There's also another picture showing the male ring on the inside of the chamber.

<center><a href="http://www.spudfiles.com/uploader/uploadFiles/travel.JPG"><img src="http://www.spudfiles.com/uploader/uploadFiles/travels.JPG"></a> <a href="http://www.spudfiles.com/uploader/uploadFiles/travel4.JPG"><img src="http://www.spudfiles.com/uploader/uploadFiles/travel4s.JPG"></a></center>

<blockquote id="quote"><font size="1" face="tahoma,verdana,arial" id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Rmich732
[br]In the collapsed state, could it function like a coaxial?
<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">
I never thought about it, but I don't see why it wouldn't. It would have a very small chamber volume, but yeah, it should work.
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Postby sgort87 » Wed Feb 14, 2007 3:08 pm

So I figured out how to work butane. It isn't rocket science but I am still working on the ideal spray time. Here's a video of the launcher firing a golf ball.

<a href="http://media.putfile.com/TravelGunShot">Launch Video</a>

Also, I forgot to mention that the barrel cap is used for a mixing device. :D
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Postby FLONE » Thu Feb 15, 2007 10:12 am

Gort, another amazing toy. Beautiful.
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Postby joannaardway » Mon Feb 19, 2007 11:15 am

That is so simple - yet it has that "I never knew I wanted one until I saw it" factor.
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