My Pneumatic Pen Gun -- piston doesn't activate

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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jackssmirkingrevenge
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plinkin wrote:Oh my goodness waiting is the hardest part of ANY build
Welcome to the joys of adhesive based construction ;)
hectmarr wrote:You have to make many weapons, because this field is long and short life
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plinkin
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YESZH! I HAZ PENGUN!!!!

it workz!!! :twisted:

It's shooting a wad of tissue paper right through a piece of paper @ 200 PSI!

I'm attaching pics of my piston... not original for spudguns but it's different from any other pen gun I've seen posted. Instead of solid rubber, it's rubber glued to a metal piston.

Yu wantz video?
Attachments
Barrel -- nothing but metal, no seal for itself.
Barrel -- nothing but metal, no seal for itself.
Piston
Piston
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jackssmirkingrevenge
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Good job, let's see it in action :)
hectmarr wrote:You have to make many weapons, because this field is long and short life
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Gun Freak
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Gratz! Yeah let's see the video!
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plinkin
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Here is a small compilation of shots and details of the gun I put together. It's a google doc video, not youtube, sorry... parents won't let me. But it's very similar.
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plinkin
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Uh, hello guys? Was my video appalling? What happened to all the replies? hahaha :roll:
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warhead052
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Its not bad. Its pretty good actually. I wish I had a pump like that now...
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plinkin
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Wow, haha. That was a quick reply. Thanks for the comment! :)

yeah the pump was only 25 bucks at Sports Chalet. It was an impulse buy, actually (I knew I would be using it for guns like this even though I hadn't made any yet).
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jackssmirkingrevenge
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plinkin wrote:Uh, hello guys?
Not easily accesible. If your parents banned youtube, there are plenty of other video hosting sites, even photobucket can host videos.
hectmarr wrote:You have to make many weapons, because this field is long and short life
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plinkin
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Hold on, doesn't the link work? Just to verify... I'm almost positive it should...
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Nice pen gun and the video link works here in the USA. Other countries may not allow Google video. Youtube is the most universal but content from restricted countries cannot be viewed here in the USA.

Try www.Photobucket.com, it's free and will probably get to those countries Google wont. Put the video on both places.
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plinkin
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OK, just did. Here's the video:
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jackssmirkingrevenge
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Nice!

Some comments:

- nice shock pump :) but what's stopping you from going to 400 psi?

- try using one 6mm and one 4.5mm BB in the cap (4.5mm touching the schrader) it will give you better pilot flow and the valve will open quicker

- it's a good idea - as long as you're safety conscious - to pressurise your pen gun first, before loading the ammunition. If not, you can poke in something that will then get between the piston and the breech and not allow your piston to seal, meaning you have to take it apart again...
hectmarr wrote:You have to make many weapons, because this field is long and short life
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Gun Freak
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Very nice pengun! Makes me want to finish mine! Glad you got it working, nice job. :D
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Golf Ball Cannon "Superna" ■ M16 BBMG ■ Pengun ■ Hammer Valve Airsoft Sniper ■ High Pressure .22 Coax
Holy Shat!
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