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C:B ratio
Posted: Thu Jul 13, 2006 7:38 am
by WOW!!
What is the optim(spelling) C:B ratio? I have been reading around and heard 1.5:1 is good. Is that right?
Posted: Thu Jul 13, 2006 11:00 am
by FiveseveN
Seriously, princess, haven't you been around long enough to know better?!
All the C:B ratio threads should be merged into one. Which reminds me about that FAQ idea.
Posted: Thu Jul 13, 2006 11:11 am
by WOW!!
Smartass
Posted: Thu Jul 13, 2006 2:00 pm
by SpudStuff
0.8:1 works great for me
Posted: Thu Jul 13, 2006 7:45 pm
by frogy
.8:1 = perfect for propane cannons
anything for 2:1 to 1:1 works fine for standard combustions 1.5:1 is great
For pneumatics .4:1 works, and so does 8:1, it doesn't matter
Posted: Sun Jul 23, 2006 11:43 am
by grum7n7
is it volume (c):volume (b) ...if your combustion has a bigger diameter than your barrel than you would want volume of the chamber to the volume of the barrel to be .8:1??? but if the cumbustion and the barrel is the same diameter than you can just do lenght to length rather than volume right?
sorry for the dumb question but i just want to clear this up...its pretty much common sense what i am asking but im sure there are people that are wondering
C:B ratio
Posted: Sun Jul 23, 2006 2:53 pm
by Johnny Blast
I noticed flames shooting out my barrel at night. I made a longer barrell so the projectile would be pushed longer for more distance. It's not scientific, but it seems to be common sense from my observation.
Posted: Sun Jul 23, 2006 3:02 pm
by WOW!!
I was trying to get the optium ratio for maxium power.
Posted: Sun Jul 23, 2006 3:55 pm
by CS
Obviously, you all fail to conceive the purpose of the C:B ratios... There used if say your launcher is confined to a overall length of X and your chamber to 4" in diameter, and your barrel to 1.5" in diameter. C:B ratios are just used when you want the most power for overall size, more easily said as effeincy.
Wow, in your last post it seems as if your quest is "maxium power". No limiting factor of size. So a C:B ratio of Big @ss #:1 would be a good ratio. [Big @ss # = 100,000 ? ]
The C:B ratios arent so easily answered, seeing as you have lots of limiting factors. Variables such as chamber length, barrel length, chamber diameter, barrel diameter, overall length, etc.
AKA, your not going to get one nice number on a platter seeing as the variables are to many.
Wow, you have almost 400 posts yet you still fail to conceive such a simple subject. Can I say "What a failure."?
Posted: Sun Jul 23, 2006 4:09 pm
by Velocity
Yeah, Pimpmann is right
WOW!!, check out the part about ratios here:
http://www.spudtech.com/content.asp?id=6
The only part I disagree with is the maximum of a 4:1 ratio... in my opinion, this is WAY too large of a ratio. Keep it from 1:1 to 2.5:1