Homebrewers Association  AHA Forum
General Category => Beer Recipes => Topic started by: devilpanda on November 04, 2010, 04:24:03 PM

First time I've ever attempted to scale down a recipe. I think I was able to get the grain bill calculated correctly but am having a hard time figuring out how to convert the recipe from 16bbl to 5 gal.
Here are the percentages that I came up with:
Fermentables Lbs %
2Row 700 57.85%
Biscuit 220 18.18%
Munich 110 9.09%
Victory 75 6.20%
Black Malt 50 4.13%
Carafa III 40 3.31%
Molasses 15 1.24%
1210 100.00%
I believe a bbl is 43 gals so that brings this to 688gals. This is the part where I'm stuck.
Anyone have any advice?
Thank you,
MN
p.s.  Never worked with molasses before. Not sure when to add that to the boil.

You already have all the percentages, so what you need is the amount of total malt. To get that, find the original gravity of the beer you're trying to replicate and then figure your efficiency. The rest is just multiplication. Once you find out how much malt you need to get the O.G. then each ingredient is a percentage of that.

A bbl is 31 gal so start with 496 gal. You can add sugar anytime during boil, just shut of the heat before adding it to prevent scorching. Then stir the wort well to dissolve the sugar and bring back to boil. When you add the sugar will make a difference in hop utilization. (Thicker wort = less hop utilization)
You need the Brewhouse efficiency for this recipe as well as your Brewhouse efficiency before you can scale a recipe. Once you have that you can enter the recipe in a brewing program with 496 gal @ whatever the original efficiency was and then have the program scale it down to 5 gal and your Brewhouse efficiency. I have done this both ways using Brew Smith. Unfortunately recipes from larger brewery are not linier but this method has given me a good starting point in the past.
Matt

Thanks guys. I see I was looking at the UK barrel conversion there originally.
I doubt I'm going to be able to get too much more in terms of OG or brewhouse efficiency from this brewer so I'm jsut gonna have to fill the gaps with some generalities.
MN

Can you find out the ABV? You can work back from that.

I use this a lot...
http://www.onlineconversion.com/volume.htm (http://www.onlineconversion.com/volume.htm)
;D

496 gallons is close enough to 500 that I would just divide everything by 100.
Fermentables Lbs
2Row 7
Biscuit 2.2
Munich 1.1
Victory .75
Black Malt .5
Carafa III .4
Molasses .15
If you can't get any info on efficiency, start with that and see how close it is, tweak it from there. If you can find some efficiency or alcohol content, then I would only change the 2Row to hit the gravity for your system.
That's what I would do anyway. ;D