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Premixed bulk tank

Post questions and info about hybrid (compressed gas with fuel) powered cannons here. This includes discussion about fuels, ratios, ignition systems, build types, safety, and anything else relevant.
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Unread postAuthor: rednecktatertosser » Mon Jul 02, 2007 7:15 pm

Yeah ill be a senior this coming year. I took a chem class but i was in the same class as modder and we mostly talked about spudguns, he knows a helluva lot more about chem than i do.
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Unread postAuthor: paaiyan » Mon Jul 02, 2007 7:17 pm

Ah, high school chem classes suck, I thought I knew everything, then I got into my college class. I learned so much more. But anyhow, the gasses will stay homogeneously mixed so long as you stay away from the liquefaction pressure (the pressure that causes the gasses to turn liquid).
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Unread postAuthor: rednecktatertosser » Mon Jul 02, 2007 7:20 pm

Ok well, thanks for the newfound knowledge about gasses. On the plus side playing with liquid N2 was quite fun!
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Unread postAuthor: SpudBlaster15 » Mon Jul 02, 2007 7:21 pm

All you lucky people and your high school chem classes. My school doesn't offer chem classes until 11th grade (I am in 10th grade), and they have so few qualified teachers, they have to alternate between chem and physics each year, meaning I won't be able to take a chem class until 12th grade. :cry:
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Unread postAuthor: rednecktatertosser » Mon Jul 02, 2007 7:25 pm

well it seams you already know quite abit about chem, atleast more than me, and i took chem in 11th grade.
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Unread postAuthor: paaiyan » Mon Jul 02, 2007 7:28 pm

rednecktatertosser wrote:Ok well, thanks for the newfound knowledge about gasses. On the plus side playing with liquid N2 was quite fun!


Haha, I'll admit, I did have fun. We did the liquid N2 thing, we set up an apparatus that was a tube from the natural gas outlet attatched to a funnel, we dipped it in bubble solution and blew bubbles with natural gas... then lit them, bwahaha. We also went outside with a bucket of water, a bar of sodium, and a spoon. Cut the sodium with the spoon and throw chunks into the water, awesome fun.
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Unread postAuthor: SpudBlaster15 » Mon Jul 02, 2007 7:34 pm

paaiyan wrote:Cut the sodium with the spoon and throw chunks into the water, awesome fun.


Tis' more fun with Cesium. :shock:
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Unread postAuthor: paaiyan » Mon Jul 02, 2007 7:39 pm

SpudBlaster15 wrote:
paaiyan wrote:Cut the sodium with the spoon and throw chunks into the water, awesome fun.


Tis' more fun with Cesium. :shock:


Yea, well, they won't let high school chem teachers have that, at least that's what he told us. Also, we were using an old metal bucket to hold the water, if we were to use cesium, we would have to replenish the water after every reaction, and the inherent violence of the explosion could have rendered the bucket into shrapnel which could be quite dangerous.
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Unread postAuthor: MrCrowley » Mon Jul 02, 2007 7:55 pm

I really wanted to take chem and thats why I am currently. We too don't get offered chem till '5th Form' which is '11th grade' I believe. But I am bored sh|tless of it, I didnt pay attention last year so im struggling through this year not knowing anything. And most lessons are theories then when we do practicals its like mixing HCL with Zn and see what happens :shock: Not much I tell you lol

Edit: My bad :oops: didn't actually read the topic title, just thought it was a topic about chemistry :roll:
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Unread postAuthor: BC Pneumatics » Mon Jul 02, 2007 8:02 pm

Lets stay on topic guys...
Tsk on you spudblaster ;)
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Unread postAuthor: homedepotpro » Mon Jul 02, 2007 8:08 pm

SpudBlaster15 wrote:
rednecktatertosser wrote:you would need to make sure that the gasses dont settle out in the premixed bulk tank.


I quote jimmy101:

Do you ever feel like you are 'tilting at windmills' on this forum?


Some people just have no concept of how a gas behaves. "Make sure the gases don't settle out" is of course, blatantly idiotic. 2 gases, injected into one container will mix at a fairly slow rate, until they are completely homogeneous. Neither gas will "settle out".

The concept of a larger tank of premixed air/fuel has been done before, check out noname's generation 1 hybrid in the showcase section.

yeah but if it is under pressure won't the propane liquefy and then settle
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Unread postAuthor: BC Pneumatics » Mon Jul 02, 2007 8:14 pm

At 4% or so propane, that would be a very, very high pressure.
In gas systems, the pressure is split in equal proportion to the contents, so 4% C3H8 at 100psi would only apply 4psi of force to the propane itself. (Pretty damn far from the liquification point.)

You just gotta love gasses...
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Unread postAuthor: PVC Arsenal 17 » Mon Jul 02, 2007 8:23 pm

BC Pneumatics wrote:If you can't cook, stay outta' the kitchen?


We're all here to learn and share, right?



Anyway, thanks for your help guys. It seems like this is more feasible than I thought, so expect a hybrid out of me soon!
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Unread postAuthor: BC Pneumatics » Mon Jul 02, 2007 8:28 pm

Bah, cookbooks my friend, you need cookbooks!

Indeed, this is a place for learning... perhaps we should be accredited?
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Unread postAuthor: rednecktatertosser » Mon Jul 02, 2007 9:05 pm

BC Pneumatics wrote:At 4% or so propane, that would be a very, very high pressure.
In gas systems, the pressure is split in equal proportion to the contents, so 4% C3H8 at 100psi would only apply 4psi of force to the propane itself. (Pretty damn far from the liquification point.)

You just gotta love gasses...


This is mostly the fact that i forgot to think about my first go around, i figured that it would be a 50/50 mix(hybrid newbie here)

SpudBlaster15 wrote:
paaiyan wrote:
Cut the sodium with the spoon and throw chunks into the water, awesome fun.


Tis' more fun with Cesium.


Cesium?!?! pssh Francium is where its at!
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