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Old 04-21-2006, 03:48 PM   #1
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Default Scaling a recipe?

If I wanted scale a recipe from 5 gallons to 10 gallons, do you just double everything (hops too) and it is good? I know it sounds like a stupid question (obvious), but I want to make sure.

I'm brewing 10 gallons of Lake Walk real soon. Only problem is it has to wait for a new mashtun, or until SwAMi gets back. Hurry up bee-yotch.

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Old 04-21-2006, 03:52 PM   #2
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Does promash scale everything linearly? I just did a batch and used promash to scale it down and it worked out fine. Just click "lock ingredients to batch size" and change the batch (I'm sure you know.)

Brewpastor should know for sure, he does the biggest batches around here, I think.

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Old 04-21-2006, 04:35 PM   #3
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Doesn't the recipator do that for you too? It will scale your hops to boil size for partials even

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Old 04-21-2006, 04:51 PM   #4
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I've always scaled things in Promash to 5.5g (up & down). I always assumed it just does it linearly, but don't know for sure.

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Old 04-21-2006, 04:57 PM   #5
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I don't see why it should not be liner (at least for the grains). I'd do the same for the hops since I wouldn't know how the utilization is affected by the increased boil size. None of the tables that we use for utilisation account for different boil sizes anyway.

Not as dumb of a question as it sounds, Dude.

Kai

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Old 04-21-2006, 05:26 PM   #6
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I think hop utilization is more dependent on the gravity of the wort as opposed to boil volume.

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Old 04-21-2006, 05:35 PM   #7
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Quote:
Originally Posted by Kaiser

Not as dumb of a question as it sounds, Dude.

Kai
LOL...it seems to be turning out that way, doesn't it?

I think I just need to RDWAHB and scale it up and see what happens. WTF.
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Old 04-21-2006, 05:45 PM   #8
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i'd just double the ingredients... but i'm not one for fancy equations, fractions and the like...

this is about as complicated as i can get: 2/5=x/10. where x would equal 4, and i'm not even sure i can remember the necisary algebra to solve the equation....

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Old 04-21-2006, 05:57 PM   #9
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Quote:
Originally Posted by Dude
I think I just need to RDWAHB and scale it up and see what happens. WTF.
Amen brotha.
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Old 04-21-2006, 06:11 PM   #10
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I agree--double everything.

Hops utilization should be the same. As someone mentioned, that is a function of SG of the boil, not volume.

The one thing you might want to adjust is evaporation percentage. I think you can assume you'll get a somewhat less vigorous boil with twice as much wort.

So if you usually boil 6.5 gallons to get a 5 gallon batch, you might only need to boil 11.5 or 12 gallons to get a 10 gallon batch.

But I'm just WAGing on these figures.

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