My Idea
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- Posts: 26
- Joined: Fri Dec 04, 2009 7:40 am
My Idea
Hey guys if you all read my hi post you know i'm planning to make "weapon"
how much can 250 and 300 psi push water? 50 feet?
ok so here's an image of the basic schematic:
http://s923.photobucket.com/albums/ad74 ... nt=SSC.jpg
here is a 4ft metal pipe i found at the back of my house which i will use for a barrel
http://s923.photobucket.com/albums/ad74 ... 130736.jpg
here is a black tape i will use for my electronics
http://s923.photobucket.com/albums/ad74 ... 130535.jpg
here is the kokoahut container ill use for holding my water
http://s923.photobucket.com/albums/ad74 ... 130424.jpg
the cap witch will be glued to object A
http://i923.photobucket.com/albums/ad74 ... 130415.jpg
this is object A
updates will come soon in a meantime here are a few questions
how long do you think the barrel should be?remember i only have 4feet
how much can 250 and 300 psi push water? 50 feet?
attached are some downloadable pics
how much can 250 and 300 psi push water? 50 feet?
ok so here's an image of the basic schematic:
http://s923.photobucket.com/albums/ad74 ... nt=SSC.jpg
here is a 4ft metal pipe i found at the back of my house which i will use for a barrel
http://s923.photobucket.com/albums/ad74 ... 130736.jpg
here is a black tape i will use for my electronics
http://s923.photobucket.com/albums/ad74 ... 130535.jpg
here is the kokoahut container ill use for holding my water
http://s923.photobucket.com/albums/ad74 ... 130424.jpg
the cap witch will be glued to object A
http://i923.photobucket.com/albums/ad74 ... 130415.jpg
this is object A
updates will come soon in a meantime here are a few questions
how long do you think the barrel should be?remember i only have 4feet
how much can 250 and 300 psi push water? 50 feet?
attached are some downloadable pics
Last edited by TheArbiter97 on Wed Dec 09, 2009 9:16 am, edited 1 time in total.
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- Posts: 26
- Joined: Fri Dec 04, 2009 7:40 am
Re: My Idea
a taught came into my head do you guys think i should was off the red area making it look squary and small?
cause one of my aims is to have object a or something liek that about 2-3feet
cause one of my aims is to have object a or something liek that about 2-3feet
- JuchTurtles
- Posts: 478
- Joined: Sun Jul 19, 2009 5:52 pm
Re: My Idea
Hmmm... This looks interesting. I don't think you want a 4 foot long barrel, longer barrels actually reduce range.
Btw, 250-300 psi! That would shoot very far, and hurt to be shot wih at close range.
Ben's Supercannon II shot about 70 feet at 100 psi. Depending on design, you may get 150 or so or more! You don't need that much pressure; it hurts!
Btw, 250-300 psi! That would shoot very far, and hurt to be shot wih at close range.
Ben's Supercannon II shot about 70 feet at 100 psi. Depending on design, you may get 150 or so or more! You don't need that much pressure; it hurts!
Last edited by JuchTurtles on Sat Dec 12, 2009 3:53 pm, edited 1 time in total.
The name's Juch, just Juch.
Also known as Commander JuchJawsTurtles, commander of the C0BALT TiDE team in The Ocean Volcano Union.
SPLASH! You're dead!
Also known as Commander JuchJawsTurtles, commander of the C0BALT TiDE team in The Ocean Volcano Union.
SPLASH! You're dead!
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- Posts: 26
- Joined: Fri Dec 04, 2009 7:40 am
Re: My Idea
if you saw my earlier project you would know i am building a sniper rifle type and be a menace on a roof with nobody pwning meJuchTurtles wrote:Hmmm... This looks interesting. I don't think you want a 4 foot long barrel, longer barrels actually reduce range.
Btw, 250-300 psi! That would shoot very far, and hurt to be shot wih at close range.
Ben's Supercannon II shot about 70 feet at 100 psi. Depending on design, you may get 150 or so or more! You don't need that much pressure; it hurts!
But still, cool project!
i was inspired when i saw a waterfall and a military copter the copter reminded me i wanted to be a sniper in the military and the waterfull put it together
i will post more pics soon
cause know i am only collectiog
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- Posts: 26
- Joined: Fri Dec 04, 2009 7:40 am
Re: My Idea
okay attached here are some images of stuff i just bought okay i just talked with my farther and he said that the batteries i have are not powerfull for the air compressor so he told me a motorcycle battery would be powerfull so later i will show the diagram and give a better writeup
damn my internet is slow
well i hope you guys can help me with finding the sniper scope i would need
one more thing i am posting in general beacause this post is about materials and collectiong and discussion
the post about building and designing discussion will be in homeades
oh and also need help cause the aircompressor was so damn loud so any ideas to make it softer of silence it?
3 goals now
1.to build my 1st homeade and diy tool
2.to make my weapon be in the notable homades section
3.to have the experience of building something alone well not that alone but you get the point
damn my internet is slow
well i hope you guys can help me with finding the sniper scope i would need
one more thing i am posting in general beacause this post is about materials and collectiong and discussion
the post about building and designing discussion will be in homeades
oh and also need help cause the aircompressor was so damn loud so any ideas to make it softer of silence it?
3 goals now
1.to build my 1st homeade and diy tool
2.to make my weapon be in the notable homades section
3.to have the experience of building something alone well not that alone but you get the point
- Drenchenator
- Posts: 807
- Joined: Fri Jun 18, 2004 12:00 pm
Re: My Idea
I like how enthusiastic you are, TheArbiter97, but I have to be blunt. This water gun will not work as currently planned.
You say you're going to use 250 to 300 psi. None of your materials will support those kind of pressures. By building the gun out of these parts, you are asking for a dangerous explosion. There is a reason most water guns are made out of PVC pipe or metal pipe: These materials support a lot of pressure. None of your materials do.
Also, your diagram makes no sense. Where's the water? You have an air compressor in there, but no water. If you are making an air powered water gun, it must have an up-right pressure chamber. You don't have one. Your current design will just shoot air out the barrel.
Water guns don't have barrels; they have nozzles. A good nozzle accelerates the stream right before it leaves the gun. A barrel is just wasted space. It may be called a water gun, but it behaves very differently than a firearm.
Please check out our homemades section of the website for some basic design tips. Your gun doesn't work as planned and will just be a danger.
Edit:
It appears that your air compressor is a small one designed for inflating tires. This will not work for a water gun. If you plan to shoot water out of it, it will break. If you plan to pressurize your water with it, it will do it slowly. In all, I do not think you have planned out your design. It appears brief and fragmented.
You say you're going to use 250 to 300 psi. None of your materials will support those kind of pressures. By building the gun out of these parts, you are asking for a dangerous explosion. There is a reason most water guns are made out of PVC pipe or metal pipe: These materials support a lot of pressure. None of your materials do.
Also, your diagram makes no sense. Where's the water? You have an air compressor in there, but no water. If you are making an air powered water gun, it must have an up-right pressure chamber. You don't have one. Your current design will just shoot air out the barrel.
Water guns don't have barrels; they have nozzles. A good nozzle accelerates the stream right before it leaves the gun. A barrel is just wasted space. It may be called a water gun, but it behaves very differently than a firearm.
Please check out our homemades section of the website for some basic design tips. Your gun doesn't work as planned and will just be a danger.
Edit:
It appears that your air compressor is a small one designed for inflating tires. This will not work for a water gun. If you plan to shoot water out of it, it will break. If you plan to pressurize your water with it, it will do it slowly. In all, I do not think you have planned out your design. It appears brief and fragmented.
Straight pressure doesn't increase range like that. Range is very hard to increase. Even with a high power gasoline water pump (very high pressure indeed), the range is only about 90 feet. Flow rate increases with pressure, but there's much more to range than pressure. The stream must be well laminated or it will break up before it shoots too far.JuchTurtles wrote:Btw, 250-300 psi! That would shoot very far, and hurt to be shot wih at close range.
Ben's Supercannon II shot about 70 feet at 100 psi. Depending on design, you may get 150 or so or more! You don't need that much pressure; it hurts!
Last edited by Drenchenator on Thu Dec 10, 2009 6:34 pm, edited 1 time in total.
The Drenchenator, also known as Lt. Col. Drench.
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- Posts: 26
- Joined: Fri Dec 04, 2009 7:40 am
Re: My Idea
mind helping me with altering the design with drawing or metal?Drenchenator wrote:I like how enthusiastic you are, TheArbiter97, but I have to be blunt. This water gun will not work as currently planned.
You say you're going to use 250 to 300 psi. None of your materials will support those kind of pressures. By building the gun out of these parts, you are asking for a dangerous explosion. There is a reason most water guns are made out of PVC pipe or metal pipe: These materials support a lot of pressure. None of your materials do.
Also, your diagram makes no sense. Where's the water? You have an air compressor in there, but no water. If you are making an air powered water gun, it must have an up-right pressure chamber. You don't have one. Your current design will just shoot air out the barrel.
Water guns don't have barrels; they have nozzles. A good nozzle accelerates the stream right before it leaves the gun. A barrel is just wasted space. It may be called a water gun, but it behaves very differently than a firearm.
Please check out our homemades section of the website for some basic design tips. Your gun doesn't work as planned and will just be a danger.
Edit:
It appears that your air compressor is a small one designed for inflating tires. This will not work for a water gun. If you plan to shoot water out of it, it will break. If you plan to pressurize your water with it, it will do it slowly. In all, I do not think you have planned out your design. It appears brief and fragmented.
Straight pressure doesn't increase range like that. Range is very hard to increase. Even with a high power gasoline water pump (very high pressure indeed), the range is only about 90 feet. Flow rate increases with pressure, but there's much more to range than pressure. The stream must be well laminated or it will break up before it shoots too far.
edit:blunt is good i really like people who help me and let me knoe what is wrong here's a cookie for you XD
Last edited by TheArbiter97 on Fri Dec 11, 2009 12:25 am, edited 1 time in total.
- Drenchenator
- Posts: 807
- Joined: Fri Jun 18, 2004 12:00 pm
Re: My Idea
Unfortunately, your design has nothing to go on. I suggest you go back to the drawing board and come up with a completely new design.mind helping me with altering the design with drawing or metal?
The Drenchenator, also known as Lt. Col. Drench.
- SSCBen
- Posts: 6449
- Joined: Sat Mar 22, 2003 1:00 pm
Re: My Idea
TheArbiter97, I too would suggest learning more about how water guns and then making a new design. You should find this page and the links off it to be helpful: http://www.sscentral.org/physics/works.html
Your expectations are also unrealistic. Pressures higher than 70 psi or so are nearly worthless in water gun designs because you get diminishing returns by increasing pressure. In other words, doubling the pressure might only increase the water flow by 10%. An increase in flow might result in reduced range as well, so higher pressures could actually reduce range.
You're probably also unaware that most pumps take a while to build up to higher pressures. Portable air compressors, especially tire inflaters like what you have, are particularly bad in this respect.
Your expectations are also unrealistic. Pressures higher than 70 psi or so are nearly worthless in water gun designs because you get diminishing returns by increasing pressure. In other words, doubling the pressure might only increase the water flow by 10%. An increase in flow might result in reduced range as well, so higher pressures could actually reduce range.
You're probably also unaware that most pumps take a while to build up to higher pressures. Portable air compressors, especially tire inflaters like what you have, are particularly bad in this respect.
- cantab
- Posts: 1492
- Joined: Fri Oct 19, 2007 1:35 pm
Re: My Idea
I'm not sure I understand the design.
250 psi is overkill. 100 is more than enough. The Mythbusters launched a cannonball around a mile using 68 psi.
What's more important is using large diameter tubing without tight bends, a decent sized pressure chamber, and the right nozzle, to promote a reasonably high flow rate and a thick stream that suffers less relative drag.
250 psi is overkill. 100 is more than enough. The Mythbusters launched a cannonball around a mile using 68 psi.
What's more important is using large diameter tubing without tight bends, a decent sized pressure chamber, and the right nozzle, to promote a reasonably high flow rate and a thick stream that suffers less relative drag.
I work on Windows. My toolbox is Linux.
Arsenal:
Super Soaker: XP215, 2xXP220, Liquidator, Aquashock Secret Strike M(odded), Arctic Blast M, CPS1200, CPS2100, SC Power Pak, 3l aquapack, 1.5l aquapack
Water Warriors: Jet, Sting Ray M, Shark, Argon M, Tiger Shark, PulseMaster
Others: Waterbolt, The Blaster, Storm 500, Shield Blaster 2000, generic PR gun, generic backpack piston pumper (broken), 3l garden sprayer M, 10l water carrier:
Arsenal:
Super Soaker: XP215, 2xXP220, Liquidator, Aquashock Secret Strike M(odded), Arctic Blast M, CPS1200, CPS2100, SC Power Pak, 3l aquapack, 1.5l aquapack
Water Warriors: Jet, Sting Ray M, Shark, Argon M, Tiger Shark, PulseMaster
Others: Waterbolt, The Blaster, Storm 500, Shield Blaster 2000, generic PR gun, generic backpack piston pumper (broken), 3l garden sprayer M, 10l water carrier:
- JuchTurtles
- Posts: 478
- Joined: Sun Jul 19, 2009 5:52 pm
Re: My Idea
I've got a question for TheArbiter.
Here it is.
Btw, what the heck is object A? Is that like some kind-of mailbox or something?
What is the bottle you show in a picture for? Is that the pressure chamber? Where does it go on the design?
Why am I asking all of this? I don't understand.
Awaiting a response.
Here it is.
I looked at the diagram again. Where is the water even held? To me, this is like a WBL or something that's just shooting air. I don't see anywhere for it.Where is the pressure chamber in the design? I don't see one.
Btw, what the heck is object A? Is that like some kind-of mailbox or something?
What is the bottle you show in a picture for? Is that the pressure chamber? Where does it go on the design?
Why am I asking all of this? I don't understand.
Awaiting a response.
The name's Juch, just Juch.
Also known as Commander JuchJawsTurtles, commander of the C0BALT TiDE team in The Ocean Volcano Union.
SPLASH! You're dead!
Also known as Commander JuchJawsTurtles, commander of the C0BALT TiDE team in The Ocean Volcano Union.
SPLASH! You're dead!
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- Posts: 26
- Joined: Fri Dec 04, 2009 7:40 am
Re: My Idea
thanks for help all
Ben:thanks for the link
Juch:umm its an air compressor i dont think it needs a pressure chamber
and object A is a fish tank filter
i guess ill get back to the drawing board
also i saw a bicycle pump that pumps 100psi is that enough?
Ben:thanks for the link
Juch:umm its an air compressor i dont think it needs a pressure chamber
and object A is a fish tank filter
i guess ill get back to the drawing board
also i saw a bicycle pump that pumps 100psi is that enough?
- Drenchenator
- Posts: 807
- Joined: Fri Jun 18, 2004 12:00 pm
Re: My Idea
Perhaps none of us have been specific. What you need is not just an air pressure chamber, but a water pressure chamber. You need something that pressurizes the water, and usually what does that is pressurized air (though other stuff can do it too).Juch:umm its an air compressor i dont think it needs a pressure chamber
In an air pressure water gun, the water gets pressurized because the air is compressed and exerts a pressure on the water. Your diagram just looks like it shoots air out the water. You can use an air compressor to supply the compressed/pressurized air, but you can use it to pressurize the water; it will break; it's only designed to pressurize air, not water.
100 psi should be enough. But the question is not how you pressurize the air but how you pressurize the water. To do that with the air pressure, you have to build a pressure chamber. It's the only way.
Best of luck with the re-design.
The Drenchenator, also known as Lt. Col. Drench.
- cantab
- Posts: 1492
- Joined: Fri Oct 19, 2007 1:35 pm
Re: My Idea
You may find you can simply connect the air compressor to a water tank and have it force the water out. Air floats, so you need the water outlet at the BOTTOM of the tank.
But you're likely to encounter flow issues. Psi is not the only issue. If your compressor can only move 2 ounces of air per second, then you can only shoot 2 ounces of water per second on average.
Bike pumps are good for designs that use a pump to compress air. For designs where the pump moves water, you need to build your own pump.
What I think you should do is make a pressurised reservoir design. You need a single large pressure-rated chamber - if you want to use the very high pressures it needs to be metal, but for pressures up to 100psi you can use pressure rated PVC plumbing parts.
From that chamber you need a removable cap for filling, a water outlet at the bottom leading to the valve and nozzle, and an air inlet anywhere (if sounds of bubbles bothers you, put it at the top) leading to your compressor.
You might also want a pressure gauge, unless there's one on the compressor.
But you're likely to encounter flow issues. Psi is not the only issue. If your compressor can only move 2 ounces of air per second, then you can only shoot 2 ounces of water per second on average.
Bike pumps are good for designs that use a pump to compress air. For designs where the pump moves water, you need to build your own pump.
What I think you should do is make a pressurised reservoir design. You need a single large pressure-rated chamber - if you want to use the very high pressures it needs to be metal, but for pressures up to 100psi you can use pressure rated PVC plumbing parts.
From that chamber you need a removable cap for filling, a water outlet at the bottom leading to the valve and nozzle, and an air inlet anywhere (if sounds of bubbles bothers you, put it at the top) leading to your compressor.
You might also want a pressure gauge, unless there's one on the compressor.
I work on Windows. My toolbox is Linux.
Arsenal:
Super Soaker: XP215, 2xXP220, Liquidator, Aquashock Secret Strike M(odded), Arctic Blast M, CPS1200, CPS2100, SC Power Pak, 3l aquapack, 1.5l aquapack
Water Warriors: Jet, Sting Ray M, Shark, Argon M, Tiger Shark, PulseMaster
Others: Waterbolt, The Blaster, Storm 500, Shield Blaster 2000, generic PR gun, generic backpack piston pumper (broken), 3l garden sprayer M, 10l water carrier:
Arsenal:
Super Soaker: XP215, 2xXP220, Liquidator, Aquashock Secret Strike M(odded), Arctic Blast M, CPS1200, CPS2100, SC Power Pak, 3l aquapack, 1.5l aquapack
Water Warriors: Jet, Sting Ray M, Shark, Argon M, Tiger Shark, PulseMaster
Others: Waterbolt, The Blaster, Storm 500, Shield Blaster 2000, generic PR gun, generic backpack piston pumper (broken), 3l garden sprayer M, 10l water carrier:
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- Posts: 26
- Joined: Fri Dec 04, 2009 7:40 am
Re: My Idea
so what? you guys think i should still use the compressor for the pressure chamber?
p.s.-the bike pump is damn long i think ill get a small one around 50-70 psi
p.s.-the bike pump is damn long i think ill get a small one around 50-70 psi