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| daberno123 |
 Posted: 03/07/2010 13:52 PM Post subject: Basketball cannon anyone? |
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Cubik Cannon Creator
Joined: 19 Nov 2007
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| Gun Freak |
| Posted: 03/07/2010 13:59 PM Post subject: |
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The Anti Hybrid
Joined: 25 Jan 2010
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JSR wants it... 
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| c11man |
| Posted: 03/07/2010 14:00 PM Post subject: |
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Brigadier General
Joined: 06 Feb 2009
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since i can get that size pipe for free i have been tempted but my parents dont allow me to make any sort of a combustion cannon.....  its depressing
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| Gun Freak |
| Posted: 03/07/2010 14:04 PM Post subject: |
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The Anti Hybrid
Joined: 25 Jan 2010
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| Lol c11man how old are you?
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| jackssmirkingrevenge |
| Posted: 03/07/2010 14:38 PM Post subject: |
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aspiring machinist
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| Gun Freak wrote: | | JSR wants it... |
JSR tends to build on the smaller side, but for those of you with the benefit of land over which to shoot, why not 
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| Gun Freak |
| Posted: 03/07/2010 15:00 PM Post subject: |
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The Anti Hybrid
Joined: 25 Jan 2010
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| jackssmirkingrevenge wrote: | | why not |
DANG. Thats pretty big.
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| maverik94 |
| Posted: 03/07/2010 15:11 PM Post subject: |
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Mandolin Man
Joined: 21 Jan 2009
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| Quote: | | DANG. Thats pretty big. |
Thats what she said.
Nice...are you planning on buying it?
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| daberno123 |
| Posted: 03/07/2010 15:26 PM Post subject: |
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Cubik Cannon Creator
Joined: 19 Nov 2007
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Not sure yet. I'd love to but I don't really have the space to shoot it (I live in the suburbs). I could take it to a local park I suppose...
Four feet would cost me $86 shipped to where I live. That's manageable but I'm trying to think how often I'd actually get out and shoot it
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| jrrdw |
| Posted: 03/07/2010 15:45 PM Post subject: |
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Donating Moderator
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| Maybe you should also add to the equasion how many shots will you get out of each basketball and how many are you willing to buy?
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| daberno123 |
| Posted: 03/07/2010 16:01 PM Post subject: |
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Cubik Cannon Creator
Joined: 19 Nov 2007
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Good point. I wonder how many shots a basketball could take out of a cannon like this?
If I were to build build this, I'd also have to figure out a way to plug one end of it. Since a 10" cap costs several hundred dollars, I'd probably use concrete to cast a base around the pipe, which would make the cannon even harder to transport.
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| jrrdw |
| Posted: 03/07/2010 16:15 PM Post subject: |
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Donating Moderator
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| You could build a plug out of wood and seal it with silocone/epoxy/simular and screws to help hold it in.
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| c11man |
| Posted: 03/07/2010 17:51 PM Post subject: |
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Brigadier General
Joined: 06 Feb 2009
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| i be only 16. i was seriously planning a basketball cannon and THEN i learned of my limitations. as jrrdw mention i was going to make the end out of wood but i never did think of sealing ut up....
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| joepage2008x2 |
| Posted: 03/07/2010 18:02 PM Post subject: |
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Specialist
Joined: 02 Jul 2009
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| I have some plastic sewer pipe sections. 10" PVC 2ft sections, two of them but can get up to 10 for free. I live in UK so a cannon like this would be illegal unfortunately, far too dangerous as the tube is only 1/4" thick and my money at the moment is going in another project so dont have any spare for sealent, im literally 100yards from a field too. I would have made one a few years ago when I never thought of the danger,
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| psycix |
| Posted: 03/10/2010 7:22 AM Post subject: |
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10" SCH40....
A quick calculation, comparing 1" sch40 to 10" sch40.
According to wikipedia:
1" SCH40
OD: 33.40 mm
Wall thickness: 3.378 mm
ID: 33.40-(2*3.378) = 26.6 mm
ID:wall ratio: 7.87
10" SCH40
OD: 273.05 mm
Wall: 9.271 mm
ID: 273.05-(2*9.271) = 254 mm
Ratio: 27.4
So the burst pressure of 10" sch40 is...
27.4/7.87=3.84
Almost 4 times LOWER than 1" sch40!
1" sch40 can be used up to, what...? 150 psi?
Then 150/4=37.5 psi
You can use this 10" pipe only up to ~40 psi.
You NEED SCH80 for a simple combustion.
EDIT:
Or metal pipe.
Last edited by psycix on 03/10/2010 14:54 PM; edited 1 time in total |
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| DR |
| Posted: 03/10/2010 9:24 AM Post subject: |
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2nd Lieutenant
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