Missing a few equations

[fireballmatt]

Ok, so I know that the total SG is the sum of all addition SG's where:

SG = (W*PE*EE)/V

(W - weight in lbs, PE - potential extract in point gallons per lb, EE - extract efficiency as decimal, V - volume in gals)

So, how the hell do I find the PE??????

Also:

FG = OG(1-AA)

where AA = apparent attenuation as decimal. How do I calculate this?

[Shenanigans]

http://www.beersmith.com/

[fireballmatt]

http://www.beersmith.com/

Good idea! I'll pay someone $21.95 to do it for me! NOT.

I'm writing my own to learn and understand...some of the equations just arent Google Friendly

[mr x]

First, I believe the grain manufacturers probably know the PE, or list it on their bags of grain. Beersmith and promash have the tables with general numbers in them. You can run a free trial of Beersmith to get those numbers, or they may be out there on the net.

AA is what you would calculate from the measured OG and FG. If you want to calculate FG, you will estimate the AA from the yeast manufacturers data sheet.

[Shenanigans]

Good idea! I'll pay someone $21.95 to do it for me! NOT.

I'm writing my own to learn and understand...some of the equations just arent Google Friendly



lol pretty much close to the response I expected.

[fireballmatt]

PE = Potential SG, got it. Now, since potential SG is shown in point gallons, what exactly is a point gallon?



First, I believe the grain manufacturers probably know the PE, or list it on their bags of grain. Beersmith and promash have the tables with general numbers in them. You can run a free trial of Beersmith to get those numbers, or they may be out there on the net.

AA is what you would calculate from the measured OG and FG. If you want to calculate FG, you will estimate the AA from the yeast manufacturers data sheet.

[mr x]

Ya know, if you you run regedit, and delete beersmith entries, its free forever. But I didn't say that. I recommend buying the software when you can afford it.

[mr x]

PE = Potential SG, got it. Now, since potential SG is shown in point gallons, what exactly is a point gallon?I'd have to dig out my brain for that one. It should become apparent pretty quickly I would think.

[Shenanigans]

Ya know, if you you run regedit, and delete beersmith entries, its free forever. But I didn't say that. I recommend buying the software when you can afford it.



lol yeah I've heard of that ;)

[MrMarbleHead]

Could it be Points Per Gallon. Not sure but that sounds right to me.

[fireballmatt]

I've actually tried that...but it didnt work.


Ya know, if you you run regedit, and delete beersmith entries, its free forever. But I didn't say that. I recommend buying the software when you can afford it.

[mr x]

Are you sure you deleted them all? I know it worked on version 1.3. I bought 1.4 and haven't needed to since then.

[Shenanigans]

works great with 1.4 for me.

here is the key I delete.

HKEY_USERS\S-1-5-21-823518204-854245398-839522115-1003\Software\BeerSmith\BeerSmith

[fireballmatt]

well the wife's computer came in today, so I'll throw a copy on her old machine tonight and see if it works...if not oh well, I had planned on buying it anyhow at some point or another.

[mr x]

It's worth supporting them. It's good software.

[Dale]

The book Designing Great Beers is chock full of tables and equations, it's a great source for learning how to crunch the numbers yourself.

[fireballmatt]

The book Designing Great Beers is chock full of tables and equations, it's a great source for learning how to crunch the numbers yourself.

Ooo nice, I have that on my amazon wishlist...perfect excuse to go ahead and buy it!

[mr x]

I think I may grab that book myself.

[Barley-Davidson]

The book Designing Great Beers is chock full of tables and equations, it's a great source for learning how to crunch the numbers yourself.

+1, highly recommended. Great info for nuts and bolts brewing calculations, as well as a big help learning to create your own recipes.