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SpudFiles Forum Index » Hybrid Cannon Discussion » hybrid mixtures
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bighead33
PostPosted: 02/19/2010 13:37 PM    Post subject: hybrid mixtures Reply with quote

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i herd that for my hybrid cannon i am going to use 5x more air than i use propane. is that true
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jimmy101
PostPosted: 02/19/2010 14:17 PM    Post subject: Reply with quote

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No.

http://www.spudfiles.com/forums/hybrid-fueling-101-t13602.html

Basically, for a 5X hybrid you inject 5X as much fuel as for a standard (1X) combustion gun. You then pressurize with air to a bit more than 5 ATM. The link above gives more details.

For a propane powered gun there is always about 25 times more air than there is fuel.
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CpTn_lAw
PostPosted: 02/19/2010 14:26 PM    Post subject: Reply with quote

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If you're asking yourself that question, maybe you should work a little more on the principles.
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ramses
PostPosted: 02/19/2010 15:43 PM    Post subject: Reply with quote

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jimmy101 wrote:
You then pressurize with air to a bit more than 5 ATM.


It is worth noting that this is absolute pressure, and that we have one ATM (14.7 PSI) all around us. This can be subtracted from the required air pressure.
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jimmy101
PostPosted: 02/19/2010 16:06 PM    Post subject: Reply with quote

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ramses wrote:
jimmy101 wrote:
You then pressurize with air to a bit more than 5 ATM.


It is worth noting that this is absolute pressure, and that we have one ATM (14.7 PSI) all around us. This can be subtracted from the required air pressure.

Good catch. If your pressure gauge reads zero in air then you pressurize to 4 ATM (your gauge reads PSIG). If it reads 1 ATM in air then you pressurize to 5 ATM (your gauge reads PSIA). Gauges that read PSIG are far more common.
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