High pressure gun --> silencer video update

Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
MRR
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Sun May 03, 2009 1:05 pm

I like that gun so much at the moment that I added a breach load that was reserved for one of my bigger guns.

Well, looks bad ass....
ImageImage

Close up of the breach. I will also add a handle.
Image
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CpTn_lAw
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Sun May 03, 2009 1:10 pm

Niceee :D

Any guess on the average muzzle velocity ?
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MRR
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Sun May 03, 2009 1:17 pm

Nope, I was so busy building that i didn't test the performance with silencer and now it's getting dark outside :cry: .
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c11man
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Sun May 03, 2009 4:31 pm

why cant the sun rise faster? anyway i cant wait till we get some preformace numbers from this beast
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daniel323
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Sun May 03, 2009 5:55 pm

that gun looks amazing and powerful great build.
MRR
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Mon May 04, 2009 9:35 am

Made some test shots and the results were not disappointing but also not as good as i expected.

I simply build too fast.... I have multiple leaks (noticeable at 200psi +) and the breach load doesn't seal 100%. :cry:

I'm going to disassemble the gun an try again.
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Gaderelguitarist
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Mon May 04, 2009 10:22 pm

MRR wrote:Made some test shots and the results were not disappointing but also not as good as i expected.

I simply build too fast.... I have multiple leaks (noticeable at 200psi +) and the breach load doesn't seal 100%. :cry:

I'm going to disassemble the gun an try again.
Slap on a couple more layers of Teflon tape and really crank those fittings together.

For the breach, maybe try a sealing gasket that makes a seal when you close the bolt.
MRR
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Wed May 06, 2009 11:48 am

I've found the problem...
The hose barb that the piston seals against is screwed "upside down" so I had to wrap the teflon tape in the other direction (forgot about that).

I made a test shot at 245psi on a 3cm wooden board (5" nail) and it went right through. :twisted:
MRR
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Mon May 11, 2009 1:41 pm

Here is a little video footage i shot at the weekend.

Yes I know the garden is a mess at the moment.
I've found the music on jamendo.com ... sounds like Kung-Fu somehow :D

[youtube][/youtube]
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jackssmirkingrevenge
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Mon May 11, 2009 2:12 pm

Nice :) could the aiming fail be coming from the fact that you weren't shooting from rest?

Try resting the launcher on a bench or something and try shooting a group of 5-10 shots, with the laser attached and always pointing at the same spot - see if it groups at random.
MRR
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Mon May 11, 2009 2:19 pm

I will try that but the biggest problem in my opinion is the alignment of laser and barrel (just zip tied it)
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ALIHISGREAT
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Mon May 11, 2009 2:26 pm

I love damage vids, be sure to keep the coming!
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jackssmirkingrevenge
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Mon May 11, 2009 2:26 pm

Why not buy a proper laser, they're not that expensive.
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paaiyan
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Mon May 11, 2009 2:28 pm

Well jack's idea is the best thing either way. If it's random groupings you need to probably find better ammo. If your groupings are tight then it's just a matter of adjusting your laser to compensate for it.
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MRR
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Mon May 11, 2009 2:38 pm

The darts are ok and very accurate at short distance.

@jsr
I bought this cheap laser to disassemble it and give it a new housing/switch that fit the gun. I'd rather build than buy something.
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