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post launch ventilation?

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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post launch ventilation?

Unread postAuthor: bennettjackson » Sun May 29, 2011 4:56 pm

hey, does anyone know if after combustion there is still propane in the chamber hence the need to ventilate using a fan to get knew oxygen in the chamber?[/list]
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Unread postAuthor: Secret Squirrel » Sun May 29, 2011 5:07 pm

With a correct mix there should be little, if any propane or oxygen left in the chamber. Both are used up in a combustion reaction to make carbon dioxide, water, and heat.

To answer your question, yes it is necessary to vent the chamber between shots to get fresh oxygen into the chamber.
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Unread postAuthor: Lockednloaded » Sun May 29, 2011 6:19 pm

The product is co2 and water, and both of those would hamper the combustibility of the mix you add afterwards
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