SpudFiles

As many of you know the weather is changing and the air is getting colder. I would still like to shoot my advance comb., but im not sure if/how to account the the temperature's affect on the propane. My logic says lower temp, lower vapor pressure, that means less psi it the meter to get the same amount of gas, but i don't really know. I was wondering if i could get some help, im looking for a table, some equations or maybe just some educated estimates.

thanks

thats true, but you are forgetting something, the air it self...

the air will condense as well as the propane, so you wont have to change anything. thats my theory...

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yeah hi, but im pretty sure they don't condense at the same rate. at 0*F propane's vapor pressure is 11psi and oxygen is, idk, way the hell up there

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Its still the same 4.2%, but yes, there is more fuel in your meter, aswell, more oxygen in your chamber.
Thats why combustion cannons are said to have more power in cold weather (but your pvc gets brittle!)
When temperature get VERY cold, you might have your propane turning liquid when exceeding the vapor pressure.
Then you should have OR a bigger meter, or measure two shots with only half amount of the fuel (and thus pressure).

thank you spudblaster, you are a very knowledgeable spudgunner.