SpudFiles

ok guys sorry but ive tryed to figure out how to figure out the square inches I need but I couldent to fintd the ideal amouthn of propane I need if any fellow spuders could help me out It would be greatly appreciated

dimentions _ chamber is 24 inch long 3 inch pipe
atmospheric pressure_ 30.06 inches of mercury (im basicaly at sea level)
i'd use a 16 ounce propane tank
any other dimentions you need i'd be grate ful to add



----AL

Try burntlatke.com ? He has a calculator just for that.

Easiest way for me....

If you can, remove your barrel and fill the entire chamber with water. Now, slowly pour that water into a large measuring bowl, or cup and record the ml of water. Now, use the calculator on BurntLatke.com - that is what I used. Also, be sure to red the article on BurntLatke.com/lp.html - that is an excellent explanation of the equations and how to get there.

I only add this - although I followed all those steps exactly, I found that less is always better when you are trying to get the perfect mixtures. Remember your air temp and humidity play a part as well. My perfect mixture on paper said 20" of 3/8" pipe @ 70 P.S.I. for a 7000ml chamber- but in my area, this time of the year, I find I get a much better bang at about 45-50 P.S.I. - so, you will have some experimenting to do...but always start with less and work up until you have too much fuel and it does not combust properly.

Good luck...

You have a chamber with ~170ci or 2786mL...

awesome thanks im gonna go chechk out burnt now see ya

ok found the calculat n burnt but I dont know what the supply tank pressure on the bernzOmatic propane cylinders are and I also dont know what it means by fueul mixcher and lastly what does it mean by " meter pipe" ?!

sorry about the spelling and thanks for any help in advance


-------AL

lol omg dude... maybe you should start with a basic combustion and work your way up to direct propane injection... what you are asking are very fundamental (not to mention easy) things to know before you can build one of these bad boys... my guess is that you've done little to zero research as of yet... is that a fair statement?

no not really ive built two basic combustions and one phenumatic that runs of water and dry ice , and ive done reasurch none on the web I could find listed any info about the cylinders pressure, and by meterpipe i'm assume its the pre measured metal pipe inbetween the two ball valves in order to get 4%propane volume in the chamber. and by fuel mixture I think its the propane to air ratio. correct me if im wrong I've never done the propane system but hey you have to start some where so please can some one anser my questions ?

Your right so far. When it asks for "supply tank pressure" they want to know the pressure of the propane coming in from your tank. On a disposable bernzomatic it is around 90 psi but once it starts to run out or gets cold the pressure will lower. So you have to guesstamate when it comes to that. Are you going to use a gauge (psi of course)?

should I? use a guage I dident think I needed one Just thoght I should add this I just lost all my spudbux to black jack

http://www.advancedspuds.com/SpudToolonline.htm

try this calculator. It is all pretty self explanatory. and when it comes to the part for your meter pipe; choose what psi you want, what diameter pipe you want to use, what pressure you want to use (will need a guage) and pick an elevation close to yours. It will tell you how long your meter pipe will be based on the info YOU provide. the calculator will also tell you the volume of you barrel and chamber and give you the ratio. dont worry about anything on the right of the spreadsheet, you only need the info in the part on the left to get you started.

ok thanks, very helpful I dont know why I like it more than burnt's

no problem, its a good tool and its easy to use. pretty straight forward for people that are new to spudding (like me).