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 Post subject: C:B ratios
 Post Posted: Mon Jun 23, 2003 1:00 pm 
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Originaly posted by Pyro107,
i may come off sounding like an idiot, but i want to know what legnth of pipe joel uses for the chamber and barrel to get a 1.5:1 ratio for the upgraded spudgun, i dont want anything higher and nothing to srong so i will settle for this if you could help me that would be great


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 Post subject: figure it out yourself,
 Post Posted: Mon Jun 23, 2003 2:00 pm 
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Originaly posted by spudmasterofMtWashington,
depends on what size gun you are going to make of course, pick a chamber size and do the math for whichever ratio you want to get the barel length...


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 Post subject: uuuuhhhhhhhhhhhhhhhhhh
 Post Posted: Mon Jun 23, 2003 3:00 pm 
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Originaly posted by Pyro107,
i have no frikin idea how to do the math for a c:b ratio, i looked at latke's ratcalc and all it did was make a picture that said ratcalc, if anyone knows how to do the math i would appreciate it, i will be using a 4"x12" chamber


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 Post subject: RatCalc....
 Post Posted: Mon Jun 23, 2003 5:00 pm 
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Originaly posted by Bartman007,
Yes it does show a picture that says RatCalc, but if you look at the bottom of the screen in Excel there are little tabs that you can click on to change sheets inside the excel file. They are labeled: Burnt Latke / RatCalc / References /

Peace,
-Bartman007


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 Post subject: well...
 Post Posted: Mon Jun 23, 2003 6:00 pm 
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Originaly posted by Orangekid13,
Ok, first of all, this is really easy to figure out. What's the highest math you've completed. I know i coulda done this in the fifth grade. It takes a calculator if you're lazy like me, but it's really easy.

Secondly. If you wanna know what length exactly, you'd have to give us both diameters, and either the desired length of the entire gun, or of either the barrel or chamber.

I don't mean to come of like somebody who's mean, but, This is really really easy to figure out.

~Orangekid13


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 Post subject: how about this???
 Post Posted: Mon Jun 23, 2003 7:00 pm 
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Originaly posted by boogieman,
you are buying it from spudtech.com right? go to the customere service page and ask joel... many of us have no idea what dimensions he uses on the launcher... he has contact info on that page. hope this helps.


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 Post subject: wrongness
 Post Posted: Mon Jun 23, 2003 8:00 pm 
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Originaly posted by Pyro107,
i am not buying the launcher from joel the dimensions
will chamber 4"x12" barrel will be 2"
iam no good at math at all if you tell me how to do it using a calculator i will gladly do it myself
thanx for the help


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 Post subject: okay...
 Post Posted: Mon Jun 23, 2003 10:00 pm 
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Originaly posted by Orangekid13,
the volume of the chamber is roughly 4*12pi. 48pi in3. (You can times it by pi, but you don't need to, since you would just divide it out again later) The ratio is 1.5:1. You want the chamber volume to be 1.5 times the size of the barrel volume. 48/1.5=32 32/2 (2 is the barrel dia.) 16 inches long. Hope this helps your calculations in the future too.

~Orangekid13


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 Post subject: mistake
 Post Posted: Tue Jun 24, 2003 12:00 am 
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Originaly posted by cchant,
You made a mistake on the barrel radius using 2" instead of 1". The calculation should come out to 32".


To the original poster, all you need to know is:

Volume of a cylinder = pi * r^2 * length


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 Post subject: oops
 Post Posted: Tue Jun 24, 2003 1:00 pm 
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Originaly posted by Orangekid13,
I read it wrong, sorry about that. If it was 2" that would be right though. The system works properly, with the right numbers of course. I'll prolly make an excel spreadsheet like ratcalc, where you type the numbers instead of using buttons. it'd be easy for me after my microsoft office class first semester this year.

~Orangekid13


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