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dwv fittings

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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dwv fittings

Unread postAuthor: q » Wed Mar 12, 2008 3:10 pm

well, i realized that i bought dwv fittings for my spud gun that i posted pic of. the wye fitting is dwv. Are these things like death or will I be ok with using them.

thanks and sorry for the noobness.
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Unread postAuthor: SpudFarm » Wed Mar 12, 2008 3:18 pm

your fine on a combuston :)
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Unread postAuthor: psycix » Wed Mar 12, 2008 3:54 pm

spudfarm wrote:your fine on a combuston :)

Well, almost yes

On a very advanced propane metered combustion with multiple spark gaps and a good fan, I wouldnt use it.
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Unread postAuthor: OuchProgramme » Wed Mar 12, 2008 6:02 pm

Simple spray combustions sure.
Pneumatics: No no
Metered Propane: Not quite safe
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Unread postAuthor: q » Wed Mar 12, 2008 8:43 pm

if you look at the post right below this one that i started.....you can see what im working with.....do you guys think i should not be firing this thing.

:?
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Unread postAuthor: MrCrowley » Wed Mar 12, 2008 10:54 pm

<A HREF="http://www.spudfiles.com/spud_wiki/index.php?title=Identifying_Pressure_Rated_PVC">Merry Xmas</a> :)
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Unread postAuthor: psycix » Thu Mar 13, 2008 7:15 am

q wrote:if you look at the post right below this one that i started.....you can see what im working with.....do you guys think i should not be firing this thing.

:?


Hmm you can fire it, but there is a VERY VERY SMALL chance of it blowing up.
Its not big, but its there.
If you glued your fittings properly, you are fine I suppose, but next time do it without the dwv :)
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Unread postAuthor: q » Thu Mar 13, 2008 7:33 am

thanks for the input guys. i will be tearing this thing down this weekend and rebuilding with pressure rated fittings. Even if there is a very small chance of this thing blowing up I am not willing to risk getting hurt over shooting a damn potato :lol:

thanks again.
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Unread postAuthor: Mitchza89 » Thu Mar 13, 2008 8:16 am

Hmm I'd still be careful mate...Back when I first got into spudguns, I made a shitty spray combustion. It ended up blowing up on me but I used super glue and tape to hold it together so no wonder.....Back then I knew no better and did absolutely no research.

Anyone who knows my recent guns, shows how much a simple spudder can improve over a year :D.

EDIT! Sorry mate, I didn't see ya latest post about rebuilding with pressure rated fittings. All the best with ya gun aye.
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Unread postAuthor: Ragnarok » Thu Mar 13, 2008 8:49 am

OuchProgramme wrote:Simple spray combustions sure.
Pneumatics: No no
Metered Propane: Not quite safe

This is total doublethink, and I wish people would stop casually repeating it.

The peak pressure in a spray n' pray combustion can occasionally reach similar levels to a metered combustion if the mix is right, and peak combustion pressure from propane could potentially reach 100 psi in rare situations.
Pressure is pressure, be it from a combustion or a pneumatic.

It's simply not sensible to say that unrated pipe is fine for almost any type of combustion (all according to some people) but not any pneumatics (of any pressure, according to similar people). Frankly, I'd rather say neither.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: psycix » Thu Mar 13, 2008 4:37 pm

q wrote:thanks for the input guys. i will be tearing this thing down this weekend and rebuilding with pressure rated fittings. Even if there is a very small chance of this thing blowing up I am not willing to risk getting hurt over shooting a damn potato :lol:

thanks again.


A wise decision :wink:
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