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Valves, the difference opening time makes.

Posted: Fri Jan 18, 2008 10:31 pm
by Zen///
I wondered what a high speed blast of air would do to something, so at point blank, I fired blank shots out of my burst disk/ball valve sniper at paper.

Image Ball valve 70psi

Image Burst disk 70psi

Opening time>psi

Both at 70psi from point blank with the Gepárd SSAMR.

Posted: Fri Jan 18, 2008 10:40 pm
by bigwick
wow, what a difference. i have a question. i have researched it and searched for it only to come back with no results. i know how a burst disk works, but i dont understand how it is set up and what to use. can you help?

Posted: Fri Jan 18, 2008 10:42 pm
by Zen///
http://www.spudfiles.com/spud_wiki/inde ... Burst_disk

http://www.spudfiles.com/spud_wiki/inde ... burst_disk

My cannon is simply a ball valve behind a burst disk.
It luckily gives a 2 sec delay from actuating the ball valve and the disk ruptureing, giveing time for aiming and turning the ball vlave.

http://www.spudfiles.com/forums/viewtop ... tml#149682

http://www.spudfiles.com/spud_wiki/inde ... ening_time

Posted: Fri Jan 18, 2008 10:48 pm
by bigwick
ok ok thanks alot ill look at the links in a min

Posted: Fri Jan 18, 2008 10:57 pm
by Hotwired
:?:

Thats some freaky tearing on the burst disk one.

I can't say I've personally opened up on a sheet of A4 at point blank with an air round but that sheet's been torn in half and bits were nibbled from the edges.

Very odd.


But otherwise, yeah opening time improves air dumping a lot. You just can't manually open a ball valve in anything like the time a disk splitting or a pressure difference in a piston/diaphragm can.

Posted: Fri Jan 18, 2008 10:59 pm
by Zen///
Its not a scam or anything, I was suprised as well.

"Wtf thats not possible" Looks at the ripped edges*

edit: The paper was leaning against the barrel, no backrest. It flew about 3 feet back...

Edit: In pieces

Posted: Fri Jan 18, 2008 11:06 pm
by bigwick
ok zen your links didnt help. thats the part of the burst disk information i already knew. i was looking for directions or diagrams of how to install or connect a burst disk valve.

Posted: Fri Jan 18, 2008 11:09 pm
by thespeedycicada
just get a union and you should figure it out from there.

im guessing you know what a union looks like?

Posted: Fri Jan 18, 2008 11:11 pm
by Zen///
http://www.spudfiles.com/spud_wiki/inde ... itle=Union

union

Whoa, i just realized your avatar was a salamander in a pipe.

Posted: Fri Jan 18, 2008 11:12 pm
by bigwick
no now you lost me. whats a union? is that like a coupling?

Posted: Fri Jan 18, 2008 11:13 pm
by thespeedycicada
thanks zen/// im too lazy to find links and post them *sigh* :(

Posted: Fri Jan 18, 2008 11:14 pm
by bigwick
ok im sry for my last post, i didnt click the link. well anyway so basicly r they readily available like sprinkler valves?

Posted: Fri Jan 18, 2008 11:20 pm
by thespeedycicada
Zen! its not a salamander its a leopard gecko! named cheerio! and she is in fact in a barrel of an older cannon unfortunately she is gone now :cry:
but you can expect my bird displaying his beautiful self on my beautiful piston gun as my new avatar soon!

Posted: Fri Jan 18, 2008 11:20 pm
by bigbob12345
Bigwick you can eaisaly find them up to 2in in size at almost any hardware store.

Posted: Fri Jan 18, 2008 11:23 pm
by bigwick
thanks bigbob your great