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Idaho Howitzer - My first build ever!

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Idaho Howitzer - My first build ever!

Unread postAuthor: Admiral Korax » Sun Sep 13, 2015 10:16 pm

The best way to describe my first spud gun is to share the link: http://www.idahohowitzer.info

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Re: Idaho Howitzer - My first build ever!

Unread postAuthor: jrrdw » Mon Sep 14, 2015 11:50 am

Nice work. Question: What were the build rules for the competition? Got a link to them?
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Re: Idaho Howitzer - My first build ever!

Unread postAuthor: jackssmirkingrevenge » Wed Sep 16, 2015 6:44 am

The best thing about this is that you got the family involved :)

Have you considered using a burst disk for more power?
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Re: Idaho Howitzer - My first build ever!

Unread postAuthor: jrrdw » Thu Sep 17, 2015 6:44 am

jackssmirkingrevenge wrote:The best thing about this is that you got the family involved :)

Have you considered using a burst disk for more power?


Makes me wonder how much pressure can be achieved using this method??? Was there a limit per the contest rules?
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Re: Idaho Howitzer - My first build ever!

Unread postAuthor: jackssmirkingrevenge » Thu Sep 17, 2015 7:23 am

Depends on the concentration and quantity of the chemicals being used, and the size of the chamber in which they are contained.
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Re: Idaho Howitzer - My first build ever!

Unread postAuthor: jrrdw » Thu Sep 17, 2015 5:39 pm

Yea I was going with what he has built...
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Re: Idaho Howitzer - My first build ever!

Unread postAuthor: jimmy101 » Fri Sep 18, 2015 12:42 pm

jackssmirkingrevenge wrote:Depends on the concentration and quantity of the chemicals being used, and the size of the chamber in which they are contained.
Only up to a point. Eventually you reach the pressure limit of CO2 in air versus dissolved in the water. Once you reach that limit most of the additional CO2 stays in the water.

A pretty good estimate of the maximum pressure you can obtain with vinegar and bicarb is that it'll reach the same pressure as a bottle of carbonated soda. The pressure in a can of soda depends on the temperature and the amount of CO2 dissolved in the water. Typically values at room temperature are in the 30 to 60 PSIG range.
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Re: Idaho Howitzer - My first build ever!

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