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Auto Piston BB Build Log

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Auto Piston BB Build Log

Unread postAuthor: Kobl » Mon Jul 28, 2008 7:14 pm

Some of you may have seen my S.B.A.R. and however much I may have liked it I was having lots of trouble with the piston and was overall unsatisfied with the performance.

Since I have a boner for all of Brian's work I decided to essentially copy his deathray marble design on a 6mm scale but with a homemade barrel sealing piston valve instead.

Here's my current plan of attack.

1. Get all piston issues out of the way. This will involve a cast epoxy piston and some soft neoprene from McMaster.

2. Get the exhaust valve rollin'. This will involve some sort of high flow snap valve copy. It will have to kick ass to pilot my probably inefficient valve.

3. Get regulated/unregulated c02 and a pressure washer handle. ($$$)

4. Get it all running smoothly.

5. Make it look pretty.

This is what it currently looks like.

vid: http://s184.photobucket.com/albums/x58/ ... I_1966.flv

Mockup plan:

Image

What it reeallllyyy looks like for all you idiots:

Image

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Kobl
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Unread postAuthor: Mitchza89 » Mon Jul 28, 2008 7:53 pm

The un-regged CO2 scares me a bit mate. BTB is one of the best in the business. He knows his crap. I myself have always drooled over his guns but you've gotta draw the line at some point, 900psi is alot of pressure....Unless you're absolutely confident in your building abilities, keep it safe ;). Everything looks good so far, keep it up!

Mitch :D
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Unread postAuthor: Kobl » Mon Jul 28, 2008 8:05 pm

Remember sir that the basis of a full auto gun like this is the saftey pop-off valve or something similar.
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