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Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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Unread postAuthor: frankrede » Mon Nov 06, 2006 1:50 am

Abs and pvc are just different types of plastic.
There is no super secret to it.
ABS and pressure rated PVC have different purposes.
ABS can take pressure, it has great strength, but it can't take pressure for a long time like pvc.
Get over it, Abs in a combustion outperforms pvc in evry way.
Its black, It wont break if dropped, it tears if their was a freak accident, it weighs less.
I hear of pvc combustions breaking more than abs.
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Unread postAuthor: SpudBlaster15 » Mon Nov 06, 2006 2:07 am

MisterSteve124 wrote:Just because you have an ABS and DVW cannon that didn't blow up yet that doesn't mean anything. Also it is said that one day DVW can be fine and the next blow up from the same amount of pressure. And is your cannon using metered propane because if not than that is another factor that shows your explanation is wrong.


But the fact that DOZENS of other people have ABS cannons that havent blown up after hundreds, even thousands of shots, proves that ABS can take the pressure generated in a combustion cannon.

Who said that ABS suddenly loses strength from day to day? The home depot salesman who wants you to buy his far more expensive NSF-pw PVC?

Metered propane and aerosol fuels produce essentially the same amount of peak pressure, so this is not a factor that a large amount of consideration needs to be given to.
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Unread postAuthor: Recruit » Mon Nov 06, 2006 3:36 am

http://www.sentex.net/~mwandel/cannon/my_cannon.html
http://www.sentex.net/~mwandel/cannon/p ... ncher.html
http://www.sentex.net/~mwandel/cannon/i ... ncher.html
http://www.sentex.net/~mwandel/cannon/rons_cannon.html

Now you can
1 not read these links and keep on being an idiot
2 read these links and stopping being stupid
3 DONT arrgue with people that know what they are talking about
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Unread postAuthor: MisterSteve124 » Mon Nov 06, 2006 6:36 am

ok first of all that guy is an idiot for using propane and OXYGEN in an ABS cannon, just wanted to point that out. SpudBlaster I never said ABS loses strength fron day to day. And it doesn't matter I'm going to use pressure rated fittings. I think that we can ALL agree that that would be better than using ABS.
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Unread postAuthor: Recruit » Mon Nov 06, 2006 10:44 am

No!! abs is the best for combustions becuase it only spiders when it blows.
It does not matter if he was an idiot. Why look at his cannons they survived how many shots at pure oxegen and CUTTING tourch fuel now
answer me this how many shots would pvc stand of that combination?
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Unread postAuthor: frankrede » Mon Nov 06, 2006 9:39 pm

MisterSteve124 wrote:SpudBlaster you are wrong ABS is just not pressure rated. PERIOD you don't know it can take the 40-60psi (unless you study ABS or something). And SpudStuff I just don't want it to explode at all so I am going to stick with pressure rated PVC. I'm not trying to make an arguement or anything here but I'm just going to find pressure rated PVC fittings.

You act liek abs is a ticking time bomb.
Abs is stronger and has more impact strenght than pvc, so a spike of pressure would be better handled by abs.
ABS can be used in oxy acelytene guns because of that.
Pvc would grenade.
And to the guy who said aerosol and propane are equal in power.
You are an idiot.
Propane outperforms aerosal in every way.
Perfect mixtures, no residue, no misfires.
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Unread postAuthor: MisterSteve124 » Mon Nov 06, 2006 10:25 pm

Recruit just because mapp gas is used for cutting torches doesn't mean it makes a bigger boom. It just burns at higher temperatures. Abs isn't as good as pressure rated pvc but I guess its not that much different compared to dvw pvc but it doesn't matter because you should just use pressure rated pvc. And I really hate how Home Depot and Lowe's only carry pressure rated fittings up to 2 inches and only 3 inch caps. It is so annoying, why can't they carry them in 3 inch too!?
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Unread postAuthor: Recruit » Tue Nov 07, 2006 1:32 am

Ok let me explain more heat means the faster the gas expands.

END of story why? because I know I am right and obviosly you think you are and I am dumb and have no idea.
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Unread postAuthor: SpudBlaster15 » Tue Nov 07, 2006 1:55 am

frankrede wrote:And to the guy who said aerosol and propane are equal in power.
You are an idiot.
Propane outperforms aerosal in every way.
Perfect mixtures, no residue, no misfires.


Propane and aerosol fuels produce essentially the same pressure spike. The difference between a properly mixed, stoichiometric mix of either fuel would be minute, possibly favoring propane.
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Unread postAuthor: MisterSteve124 » Tue Nov 07, 2006 10:27 am

Then why would people use propane besides it being cheap? Aerosols have other non flammable ingredients so the whole thing isn't flammable. Pure propane is all flammable. Of course it is stronger than aerosols. It is 100% flammable where aerosols have other ingredients that don't do you any good. People wouldn't favor propane just because it's a little better. It's a lot better.
Recruit I guess I see your point but it wouldn't make that much of a difference than propane.
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Unread postAuthor: SpudBlaster15 » Tue Nov 07, 2006 10:45 am

What about starting fluid? It consists usually of a relatively large aliphatic alkane such as heptane (very flammable) and also diethyl ether (extremely flammable).

People use propane because a perfect quantity can be metered and injected into the chamber, it burns cleanly, it offers slightly more power, and because it costs significantly less than aerosol fuels. Like I said, the pressure spike will be essentially the same.
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Unread postAuthor: MisterSteve124 » Tue Nov 07, 2006 10:54 am

its 100% propane how much do u think is flammable in starter fluid it says 50% either on most of them. Plus theres probably some propane to get it out of the can so lets even say 70% of flammable stuff. 100% compared to 70% and the 100% is almost perfectly measured. I think you would definetly notice the difference easily.
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Unread postAuthor: SpudBlaster15 » Tue Nov 07, 2006 6:51 pm

Look, dumbass, the other component of starting fluid is usually heptane. Heptane is considered "0" on the octane scale for gasoline. Why? Because it burns explosively.

I am not going to get into this anymore, as it is obvious you have no idea what you are talking about, and arguing with you is not worth my time.
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Unread postAuthor: MisterSteve124 » Tue Nov 07, 2006 7:07 pm

ok go ahead and call me names but you are wrong Propane definetly is stronger which is why people want to use it!
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Unread postAuthor: SpudBlaster15 » Tue Nov 07, 2006 7:10 pm

I will let your ignorance speak for itself. I am done. Good day.
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