Difference between revisions of "12 gram CO2 cartridge"
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| − | 12 gram '''CO<sub>2</sub> cartridges''' are used primarily as a portable way to provide pressurized gas to a [[pneumatic cannon]]. They cost roughly $0.50 a piece, and are typically connected via an adapter, which can be purchased for about $10 USD. | + | 12 gram '''CO<sub>2</sub> cartridges''' are used primarily as a portable way to provide pressurized gas to a [[pneumatic cannon]]. They cost roughly $0.50 a piece, and are typically connected via an [[adapter]], which can be purchased for about $10 USD. |
Once empty, they are often used as projectiles - they have a high mass, are quite sturdy, and fit in 3/4" SCH. 40 PVC. | Once empty, they are often used as projectiles - they have a high mass, are quite sturdy, and fit in 3/4" SCH. 40 PVC. | ||
| − | The following is a chart outlining the chamber size (in cubic inches) vs. pressure in (pounds per square inch) using a 12 gram CO2 cartridge: | + | The following is a chart outlining the chamber size (in cubic inches) vs. [[pressure]] in (pounds per square inch) using a 12 gram CO2 cartridge: |
<table> | <table> | ||
<tr><td>Chamber Size (ci)</td><td>Chamber Pressure (PSI)</td></tr> | <tr><td>Chamber Size (ci)</td><td>Chamber Pressure (PSI)</td></tr> | ||
| Line 20: | Line 20: | ||
To calculate the pressure for any non-given value, use this equation, but note that the pressure can't go above 800 PSI (the vapor pressure of CO2). | To calculate the pressure for any non-given value, use this equation, but note that the pressure can't go above 800 PSI (the vapor pressure of CO2). | ||
| − | 4200/Chamber Volume In ci=Chamber Pressure in psi -OR- 4200/CV=CP<br> | + | 4200/[[Chamber]] Volume In ci=Chamber Pressure in psi -OR- 4200/CV=CP<br> |
For example:<br> | For example:<br> | ||
You have a chamber volume of 41.3ci.<br> | You have a chamber volume of 41.3ci.<br> | ||
Revision as of 14:16, 1 June 2008
12 gram CO2 cartridges are used primarily as a portable way to provide pressurized gas to a pneumatic cannon. They cost roughly $0.50 a piece, and are typically connected via an adapter, which can be purchased for about $10 USD. Once empty, they are often used as projectiles - they have a high mass, are quite sturdy, and fit in 3/4" SCH. 40 PVC.
The following is a chart outlining the chamber size (in cubic inches) vs. pressure in (pounds per square inch) using a 12 gram CO2 cartridge:
| Chamber Size (ci) | Chamber Pressure (PSI) |
| 10 | 420 |
| 20 | 210 |
| 30 | 140 |
| 40 | 105 |
| 50 | 84 |
| 60 | 70 |
| 70 | 60 |
| 80 | 53 |
| 90 | 47 |
| 100 | 42 |
To calculate the pressure for any non-given value, use this equation, but note that the pressure can't go above 800 PSI (the vapor pressure of CO2).
4200/Chamber Volume In ci=Chamber Pressure in psi -OR- 4200/CV=CP
For example:
You have a chamber volume of 41.3ci.
So it can be said that 4200/41.3=CP
4200/41.3 is equal to 101.6949152542373 For simplicity's sake we will round this to 101.7
This means that CP=101.7 PSI
Your 41.3ci chamber will have a pressure of 101.7 PSI when filled with one 12g CO2 cartridge.
