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Posted: Thu Oct 12, 2006 12:55 am
by Tyro
cool, is it hard to find PN15, because thats sounds like the perfect stuff for a Pneumatic gun.
Because i'm new to all spud guns, i was wondering if pneumatics are better then the combustion using hairspray or deodourant.
For some reason i think i heard that they were better.
Posted: Thu Oct 12, 2006 1:41 am
by rna_duelers
Well there is no reall better they all have there Pro's and Con's.Combustions with all the tricks like propaon injection and such are damn cool and portable but the pneumatics have a more reliable and adjustable performance but there is the need for an air source.Me im a pneumatics person.
Posted: Thu Oct 12, 2006 2:00 am
by mac
Whats the insides of the PVC measured in, diameter or radius?
Posted: Thu Oct 12, 2006 2:02 am
by MrCrowley
diameter
Posted: Thu Oct 12, 2006 2:17 am
by mac
One more question say I have a 4" chamber connected to a 1" barrel, to me it seems alittle dangerous getting all that compressed air to flow threw such a small barrel, is there any danger in it?
Posted: Thu Oct 12, 2006 2:27 am
by rna_duelers
Not at all aslong as all the pipe is pressure rated.As the pressure is always decreasing as it being released.And why would there be more danger as the air is being released from the chamber?There is more danger with the air being held then ebing released.But i do see were you are coming from.
Posted: Thu Oct 12, 2006 2:31 am
by mac
Thanks champ, thats eliminated many of my problems.
Posted: Thu Oct 12, 2006 3:18 am
by wipsomass
Check out this post for info on prices on PVC
http://www.spudfiles.com/forums/viewtopic.php?t=3393&
Hope this helps.
btw: reece has heaps of pressure pipe
Posted: Thu Oct 12, 2006 3:33 am
by mac
Yeah ill most likely buy the PVC pipping from Reece whats a good "PN" (12,18 ect) i should go for? Remembering price is a issue.
Posted: Thu Oct 12, 2006 3:51 am
by killagorrila99
18 would be your best bet, It means its rated to 18 bar. Always go for high pressure fittings and pipe.
Posted: Thu Oct 12, 2006 6:14 am
by wipsomass
rember
18 bar = 1800KPA (or 261psi) = MASSIVE
that should give a gook kick if you got a compresser thats that powerful
but when i talked to the lady over the phone, she asked what i needed the high pressure pipe for and i told her that it was a potato cannon and she gave me a lecture on how it was illagal in NSW and such - so just have a ready excuse incase they ask.....
Better safe than sorry
Enjoy...
Posted: Thu Oct 12, 2006 6:34 am
by mac
I'm thinking 18 is abit over kill especially since ill be using a bike pump so ill probabaly go with 12, anyone know how much a meter of PN12 PVC is?
Posted: Thu Oct 12, 2006 9:23 pm
by mac
Whats a good excuse I could give to the folks at Reece?
Posted: Thu Oct 12, 2006 9:28 pm
by Extrusion
hmm try telling them you trying to make a homemade compessor or something and if she asks why say persanol reasons i mean they cant make you say why lol.
Posted: Fri Oct 13, 2006 1:20 am
by Deactivated 1
Oh yeah, that's where I bought my PN18 pressure chamber from - Reece. I was thinking Rheem or something but Reece was it. When I went to my local Reece store and they asked, I just told them I was making a little gadget. they left it at that. If all else fails tell them you are making a musical instrument and the pipe thickness affects the acoustic characteristics
