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 Post subject: Re: big bore pcp power
PostPosted: Wed May 22, 2013 12:03 am 
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Joined: Tue Jun 03, 2008 5:46 pm
Posts: 2814
Location: Canada
X2...Very cool. Kind of reminds me of the Partisans rifle...maybe the stock.

Well done IMO. :)


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Al


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 Post subject: Re: big bore pcp power
PostPosted: Wed May 22, 2013 1:24 am 
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Joined: Thu Feb 02, 2006 11:35 pm
Posts: 3099
Location: Alberta Canada
Really nice. X3 to whst Al and Daryl commented. Love to hear some #s when you can get more pressure to feed that beast. Congrats on your work.

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 Post subject: Re: big bore pcp power
PostPosted: Wed May 22, 2013 4:34 pm 
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Joined: Sun Nov 18, 2012 3:21 pm
Posts: 61
Location: uk
thanks for the positive feedback, I have pressure tested the res- to 2 1/2 thousand psi and I am sure it would be ok to run it at 1000 psi but I don't have the ability to achieve that pressure with my home made pump will post more when I have carried out some accuracy tests


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 Post subject: Re: big bore pcp power
PostPosted: Wed May 22, 2013 4:57 pm 
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Joined: Sun Aug 24, 2008 3:22 pm
Posts: 87
Location: norway
Id be interested in hearing more about your barrel rifling..


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 Post subject: Re: big bore pcp power
PostPosted: Sun Jun 30, 2013 3:34 pm 
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Joined: Mon Jun 24, 2013 6:54 pm
Posts: 361
Location: Earth
Old fridge / dehumidifier compressors can acheive C02 pressures in HPA.
There's a video on youtube where a fellow rebuilt his and uses it for regular shooting @ 450-500 psi on his homebuilt air cannon.
His gauge reads in the region of 850psi and is but a flick of a switch away.
Bill Gilmor is his name (greets Bill if he's reading this).
Here's a link to his air cannon stuff.
http://www.youtube.com/user/billg519/se ... air+cannon

I have one of these:
http://controlscentral.com/eCatalog/tab ... x?SkinSrc=[G]Skins/_default/No%20Skin&ContainerSrc=[G]Containers/_default/No%20Container
To yet wire up and run, but no PCP to feed as yet.
I suspect it's equally capable as a fridge compressor, perhaps more.
It would be nice to be able to recharge in seconds as though from a bottle, although I don't expect this rig to push 1600 psi, it may serve well as a precharge to a shoebox/freedom8 or a source for multiplier booster as in:
http://www.youtube.com/watch?v=HWoH7f90c4U

.


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 Post subject: Re: big bore pcp power
PostPosted: Sun Jun 30, 2013 4:07 pm 
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Joined: Mon Feb 11, 2013 12:46 am
Posts: 4119
I built a compressor like this for my airbrushing work and either he sped up the video or something wrong with his gauge because it takes about 10 to 15 min just to get 100 psi so I can only imagine 750 psi. :roll:

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 Post subject: Re: big bore pcp power
PostPosted: Sun Jun 30, 2013 4:27 pm 
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Joined: Mon Jun 24, 2013 6:54 pm
Posts: 361
Location: Earth
Aye, good call - he did speed it up in a demo clip just to show max.
In cannon use though it seems he's just charging the hydraulic hose to the cannon as accumulator.
Seems to build quickly in 450-500 area, but he does note it takes time for max pressure, which is no surprise.
Anyway, a consideration for folks who see hand pumping as a challenge for at least the lower third to 3k.


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