Now Playing
The Sunday Session
Sierra Nevada Brewing Co.
Steve Dresler of Sierra Nevada joins the Session... (more)
Latest Podcasts-
Sunday Session
The Sunday Session 01-29-12 OFF WEEK -
The Jamil Show
Can You Brew It: Heretic Tafelbully - The Jamil Show 12-19-11 -
Brew Strong
Brew Strong: 12-26-11 Going Pro - Marketing
- "Whoops"
by awalker
I have also been doing research on starting an apiary. Well I starte... (more) - "Hi from denmark"
by DKjorkim
Hi all, now I listen to the BN and read the forum but have not had sai... (more) - "961 Beer and Mazen Hajjar"
by mazenhajjar
You know I think that beer, my favorite social lubricant, is a great w... (more) - "21A Bitter American?"
by Chemiker
Any information on how many calories are in Bitter American? I'm about... (more) - "961 Beer and Mazen Hajjar"
by Fierce Beard
This was the most fun I've had listening in a while. Not only did Maz... (more)
BN Shows: The Sunday Session Archives
Missed Numbers
What to do if you miss your numbers
Broadcast Date: 2010-05-09 17:00:00
Running time: 02:57:26
Download: 
(71.2MB)
Mending number misses on brew day
This week on The Session the BN crew will go through the different scenarios of missing your target brewing numbers, such as original gravity and final gravity, and give tips and techniques of what you can do on the fly to solve these problems. We've all been off in our brewing attempts before and this show will teach you what the Brewcasters do when it happens to them.
Share
Email This
Comments: (3)
fun with dip stick calculus by Steve, May 10, 2010
Hi...
Outstanding show. I listened intently to the description of creating a dipstick from a copper pipe... and, it reminded me of my own effort for coming up with a dip stick. I'm about to break into a long ass discussion about how to calculate the number of inches each gal represents on a dip stick (Alright, I have had a few).
I recently purchased a new brew kettle and found myself with way more volume then I expected. Turns out my former 1" per 1 gal rule of "thumb" was waaaaay off (it's okay turned out to make one hell of a Scottish80 60/- ale).
So, I broke out my trusty 1 gal pitcher and a new wooden dip stick and got to work. After about an hour of trying to figure out where the water was hitting on the stick I decided to do a bit of googling to see if I could figure it out without getting wet.
There is a relatively simple formula for determining the volume of a cylinder (aka brew kettle):
PI *(r*r) * h = cubic inches
Where:
PI = 3.14...
r = radius = diameter of the kettle divided by 2
h = height of the kettle...
Thats nice and all, but I'm looking for the height of a single gal (there are 231 cubic inches in a gal). I guess I'll have to brush off the ol' algerbra and solve for h.
(1 gal * 231) / (PI * ( r * r))
So, if my 20 gal Polarware kettle has a diameter of 19 3/4:
Diameter/2 = radius
19.75/2 = 9.88
(1 gal * 231) / (3.141593 * (9.88 * 9.8
)
231/(3.141593 * ( 97.61))
231/306.66
.75 inches
3/4 inches
So, I just marked my dipstick every 3/4" (3/4, 1 1/2, 2 1/4, ...).
For more complicated examples, run the calculations and then convert to fractional inches. Google for "convert decimal inches to fraction inches" and use one of the online calculators.
Just for the record, I also did the gallon of water and mark the line method to verify - hit it right on. For those truly mathematical geeks out there, I know you'll lose a bit to the rounding of the bottom of the kettle - sorry I just don't care about that small amount of inaccuracy.
Happy brewing!
-Steve
Outstanding show. I listened intently to the description of creating a dipstick from a copper pipe... and, it reminded me of my own effort for coming up with a dip stick. I'm about to break into a long ass discussion about how to calculate the number of inches each gal represents on a dip stick (Alright, I have had a few).
I recently purchased a new brew kettle and found myself with way more volume then I expected. Turns out my former 1" per 1 gal rule of "thumb" was waaaaay off (it's okay turned out to make one hell of a Scottish
So, I broke out my trusty 1 gal pitcher and a new wooden dip stick and got to work. After about an hour of trying to figure out where the water was hitting on the stick I decided to do a bit of googling to see if I could figure it out without getting wet.
There is a relatively simple formula for determining the volume of a cylinder (aka brew kettle):
PI *(r*r) * h = cubic inches
Where:
PI = 3.14...
r = radius = diameter of the kettle divided by 2
h = height of the kettle...
Thats nice and all, but I'm looking for the height of a single gal (there are 231 cubic inches in a gal). I guess I'll have to brush off the ol' algerbra and solve for h.
(1 gal * 231) / (PI * ( r * r))
So, if my 20 gal Polarware kettle has a diameter of 19 3/4:
Diameter/2 = radius
19.75/2 = 9.88
(1 gal * 231) / (3.141593 * (9.88 * 9.8
) 231/(3.141593 * ( 97.61))
231/306.66
.75 inches
3/4 inches
So, I just marked my dipstick every 3/4" (3/4, 1 1/2, 2 1/4, ...).
For more complicated examples, run the calculations and then convert to fractional inches. Google for "convert decimal inches to fraction inches" and use one of the online calculators.
Just for the record, I also did the gallon of water and mark the line method to verify - hit it right on. For those truly mathematical geeks out there, I know you'll lose a bit to the rounding of the bottom of the kettle - sorry I just don't care about that small amount of inaccuracy.
Happy brewing!
-Steve
Votes: +1
report abuse
vote down
vote up
hate emoticons by Steve, May 10, 2010
that should be:
(1 gal * 231) / (3.141593 * ( 9.88 * 9.88 ) )
(1 gal * 231) / (3.141593 * ( 9.88 * 9.88 ) )
Votes: +0
report abuse
vote down
vote up
rounded bottom by nyakavt, May 13, 2010
You can calibrate the bottom of the dipstick with water up to the point where the kettle is no longer rounded, then use the calculated result from there. This would be more important if you have a bottom with a lot of round, like a keg.
Votes: +0
report abuse
vote down
vote up
Write a comment:
Facebook
Twitter
PODCASTS
BN ARMY
all content © TheBrewingNetwork.com 2008. designed by andy-roo.