Mini coaxal pneumatic from medicine bottle.

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SpudFiles Forum Index » Mini Discussion » Mini coaxal pneumatic from medicine bottle.

Mini coaxal pneumatic from medicine bottle.

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spikerbond

Posted: 05/08/2009 22:11 PM Post subject: Mini coaxal pneumatic from medicine bottle.

Private First Class

Joined: 16 Apr 2009
Posts: 27
58.59 Spud Bux

This is the first mini and the first coaxial pneumatic that I have ever made so I appreciate any and all comments (also this is my first post here so hi to everyone).

I have not glued anything in yet, so I have only been able to bring it up to around 30 psi (with it all taped up and even then there are a couple of leaks).

inonickname, thanks for the help.

Last edited by spikerbond on 05/09/2009 10:53 AM; edited 2 times in total

inonickname

Posted: 05/08/2009 22:24 PM Post subject:

Major General

Joined: 07 Dec 2008
Posts: 2487
6556.71 Spud Bux

Use the forum link on there

Looks good so far, pop the pictures up and tell some specs..such as operating pressures etc.

spudtyrrant

Posted: 05/08/2009 23:25 PM Post subject:

Colonel

Joined: 02 Jan 2009
Posts: 582
959.61 Spud Bux

i would suggest keeping this at low pressures i have had pill bottles explode when making mini combustions let alone a pneumatic nice job tho

covey12

Posted: 05/14/2009 19:05 PM Post subject:

1st Lieutenant

Joined: 23 Aug 2008
Posts: 254
183.70 Spud Bux

im guessing the schrader is also the pilot valve

microman171

Posted: 05/15/2009 0:26 AM Post subject:

Sergeant Major

Joined: 30 Apr 2008
Posts: 189
518.41 Spud Bux

*smacks for head* why didn't I think of that? Of course, a mini coaxial. Mini pistons a lower pressures should be easy right?

Great looking gun mate! Pneumatics can be much more dangerous than combustions... A pneumatic has stored pressure, whereas combustion has a spike of pressure.

jackssmirkingrevenge

Posted: 05/15/2009 0:32 AM Post subject:

aspiring machinist
<b>Donating Member</b>

Joined: 15 Mar 2007
Posts: 18061
32519.23 Spud Bux

Stick to 30 psi Shocked

Still, nice first effort, now buy some proper epoxy and make yourself a 400 psi mini coaxial Wink

spikerbond

Posted: 05/20/2009 16:41 PM Post subject:

Private First Class

Joined: 16 Apr 2009
Posts: 27
58.59 Spud Bux

Sorry for responding so late Embarassed

I have had some homework trouble. I am going to try and get it all epoxied up this weekend. Also I was wondering if wrapping it in some thin rope/whipping line and then epoxying it would increase the max psi that it could hold.

microman171

Posted: 05/20/2009 18:27 PM Post subject:

Sergeant Major

Joined: 30 Apr 2008
Posts: 189
518.41 Spud Bux

AFAIK it would. But it would be expensive, and I don't know how much extra pressure you would get out of it...

Hotwired

Posted: 05/20/2009 18:42 PM Post subject:

UK Spudgunner
Lieutenant General

Joined: 13 Oct 2006
Posts: 2578
6346.06 Spud Bux

Looks like it's a common hard/brittle clear plastic body with a softer/elastic plastic cap.

Reinforcing it wouldn't be too easy, when you wrap with string it doesn't add strength in all directions. You'd end up with it in the middle of a ball.

Easiest to just leave it as a low pressure pneumatic for desk plinking and make a separate one if you want higher pressure.

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