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what would this be like?

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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what would this be like?

Unread postAuthor: bikingpro911 » Thu Jun 26, 2008 9:48 am

if i had a total of 8 5' long 4" sch 40 tanks with two screw caps, one in front an one in the back so i can spray some 3-2-1 dry in so it gets a perfect mixture of air-fuel ratio. and the tanks were all combined together with t's and 4-ways and had a 1.5" sch 40 barrel.


would it be a tank or would it just blow up on me? lol
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Unread postAuthor: SpudFarm » Thu Jun 26, 2008 9:50 am

it would be not that good.

you would need a long 4" barrel to really use the power potential in it
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Unread postAuthor: bikingpro911 » Thu Jun 26, 2008 9:58 am

ok so then scrap the 1.5" barrel an make it an 2"...is it better? an how long of a barrel would i need cuz some1 told me i need a 60' long barrel? like wtf?
lmao
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Unread postAuthor: Carlman » Thu Jun 26, 2008 10:09 am

dude you have 40' of 4" PVC for the chamber plus elbows and Ts. now for a 1.5" barrel it would be more than 60'.

i was the one that told him, that was his question that he so had to ask on chat and write it in his thread that asked ppl to go on chat and bloody answer his question.
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Unread postAuthor: SpudFarm » Thu Jun 26, 2008 10:14 am

4" barrel is a bare minimum on those chambers
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Unread postAuthor: pizlo » Thu Jun 26, 2008 11:53 am

Its doable it will work, but ignition will be a [female doggy], and its stupid :P
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Unread postAuthor: bikingpro911 » Thu Jun 26, 2008 12:12 pm

lmao im just gunna use a stun gun for igntion. the fuel 3-2-1 dry is UN FREAKIN BELIEVABLE. lol its cheep in walmart an powerfull as (word you drop something on your toe) lmao
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Re: what would this be like?

Unread postAuthor: D_Hall » Thu Jun 26, 2008 12:58 pm

bikingpro911 wrote:so i can spray some 3-2-1 dry in so it gets a perfect mixture of air-fuel ratio.

"spray" and "perfect mixture" should never be used in the same sentence unless the sentence is, "Using a spray and pray gun, it is virtually impossible to get a perfect mixture of fuel and air."
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Unread postAuthor: Carlman » Thu Jun 26, 2008 3:09 pm

yea man if your set on doing this ridiculous waste of money launcher then go for it, but for christs sake make it metered propane :roll:
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Unread postAuthor: psycix » Thu Jun 26, 2008 6:08 pm

Your launcher will not be powerful since you seem not to have alot of knowledge of spudguns.

A larger chamber does not give an higher pressure, the only performance gain is that you have more air on that pressure, and thus the pressure drop of air going into the barrel will be less. This makes you able to use longer barrels, and thats it.

However, using 40 feet of 4", and your C:B ratio would have to be within 0,5 and 1,5 then you would need a 4" barrel with an length between 27 and 80 feet.
An 2" barrel would have to be even 4 times as long! Not even talking about 1,5".

Furthermore, the time it takes to combust all that gas is enormous unless you've got over 20 spark gaps. If you would use a 5 feet barrel, then using something a 2' 4" chamber would be more powerful then your 8x5' 4" chambers

I would also like to know how you were planning to use an aerosol can for achieving a perfect mix. You WILL need metered propane for this.

would it be a tank or would it just blow up on me?

Why would eight 5' pipes blow up faster then a single 2' pipe? If you use pressure rated parts nothing is going to blow.
Also, due to the huge volume and thus the huge combustion time, it doesn't generate a very spiky pressure peak, so its actually less likely to blow up in that way. On the other hand, the more fittings you have, the bigger the chance there is one that fails due to fabrication errors or improper glueing.

lol

Note that putting that behind your post, and also excessively using the word the word "lmao", makes you look like a retard in some way.
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Re: what would this be like?

Unread postAuthor: starman » Thu Jun 26, 2008 6:31 pm

bikingpro911 wrote:if i had a total of 8 5' long 4" sch 40 tanks with two screw caps, one in front an one in the back so i can spray some 3-2-1 dry in so it gets a perfect mixture of air-fuel ratio. and the tanks were all combined together with t's and 4-ways and had a 1.5" sch 40 barrel.


would it be a tank or would it just blow up on me? lol


It wouldn't be either...rather a ridiculously non-practical franken-chamber. Unless you had perfectly coordinated spark gaps firing in all the "sub chambers", it would take from now until kindom-come to get all the propane burned out. In the mean time the tater would have left the barrel after only a tenth of one chamber had fired...or so ( :roll: )

If you could find a way to efficiently connect to a BIG dia barrel, say 10-16", you might come close to really using the potential...otherwise don't bother.
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Unread postAuthor: SEAKING9006 » Thu Jun 26, 2008 8:50 pm

What are you trying to do, fire a 100-pound shell across the English Channel?
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Unread postAuthor: psycix » Fri Jun 27, 2008 5:06 am

Even that wont be achieved with this.
Big doesnt always mean more power.
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