### Author Topic: Am I mathematically challenged?  (Read 3185 times)

#### Titanium Brewing

• Assistant Brewer
• Posts: 130
• Westchester, CA
##### Am I mathematically challenged?
« on: January 08, 2013, 11:15:50 PM »
So I've getting into the juicy part of the book, "For the Love of hops", the recipes. I came a cross a recipe that simply perplexed me, New Zealand Pale Ale (page 248). For some reason I can't really figure out the grain bill.

75% Pale malt
10% Munich
8% Caramalt
2% Pale Crystal malt

Oh well, I probably won't get my hands on any Wai-ti this year anyways.
« Last Edit: January 10, 2013, 08:58:35 AM by Titanium Brewing »
AHA #210799

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#### dbeechum

• I spend way too much time on the AHA forum
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##### Re: Am I mathematically challenged?
« Reply #1 on: January 10, 2013, 09:16:28 AM »
Howdy,

Percentage recipes like what you posted are all about getting numbers across in a way that lets you adjust for your system efficiency.

So what you do what that sort of recipe is this: Take the efficiency of your system (say 70%) and the target OG (say 1.050) and figure out roughly how much grain would take to get you that gravity at your efficiency.

So take Pale Malt (1.036 points per pound) and multiply by your efficiency (.7) to get how effective grain is for you.

36*.7 = 25

Divide your target gravity by that number

50 / 25 = 2

So you need ~2 lbs per gallon of grain or 10 lbs for a 5 gallon batch.

10 * .75 = 7.5 lbs Pale Malt
10 * .10 = 1 lb Munich Malt
10 * .08 = 0.8 lb Caramalt
10 * .02 = 0.2 lb Pale Crystal Malt

Round as needed.
Drew Beechum - Maltosefalcons.com
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#### mabrungard

• Brewmaster General
• Posts: 2164
• Water matters!
##### Re: Am I mathematically challenged?
« Reply #2 on: January 10, 2013, 09:45:37 AM »
What is the remaining 5% mystery grain?  The recipe only added up to 95%
Martin B
Carmel, IN

BJCP National
Foam Blowers of Indiana (FBI)

Brewing Water Information at:

#### nateo

• Brewmaster General
• Posts: 2214
• Denver, CO
##### Re: Am I mathematically challenged?
« Reply #3 on: January 10, 2013, 10:15:21 AM »
What is the remaining 5% mystery grain?  The recipe only added up to 95%

In der Kürze liegt die Würze.

#### Alewyfe

• Brewer
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• Fighting for Truth, Justice & Home Brew
##### Re: Am I mathematically challenged?
« Reply #4 on: January 10, 2013, 10:56:16 AM »
What is the remaining 5% mystery grain?  The recipe only added up to 95%
It's a Heironymystery.
Diane
Roseburg, Oregon
Member: Umpqua Valley Brewers Guild
AHA

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#### erockrph

• Official Poobah of No Life.
• Posts: 6086
• Chepachet, RI
##### Re: Am I mathematically challenged?
« Reply #5 on: January 10, 2013, 11:30:07 AM »
What is the remaining 5% mystery grain?  The recipe only added up to 95%
It's a Heironymystery.

I don't have my copy in front of me, but I remember seeing a recipe that had a percentage of simple sugar to be added late that was listed separate from the grain bill - I wonder if this is the one.
Eric B.

Finally got around to starting a homebrewing blog: The Hop Whisperer

#### tschmidlin

• I must live here
• Posts: 8198
• Redmond, WA
##### Re: Am I mathematically challenged?
« Reply #6 on: January 10, 2013, 11:39:40 AM »
What is the remaining 5% mystery grain?  The recipe only added up to 95%
It's a Heironymystery.

I don't have my copy in front of me, but I remember seeing a recipe that had a percentage of simple sugar to be added late that was listed separate from the grain bill - I wonder if this is the one.
It's not.  You could either make it 80% pale malt (I would) or you can adjust all of them slightly to hit 100%.
Tom Schmidlin

#### stanhieronymus

• 1st Kit
• Posts: 17
##### Re: Am I mathematically challenged?
« Reply #7 on: January 11, 2013, 08:20:24 AM »
What is the remaining 5% mystery grain?  The recipe only added up to 95%
It's a Heironymystery.

I don't have my copy in front of me, but I remember seeing a recipe that had a percentage of simple sugar to be added late that was listed separate from the grain bill - I wonder if this is the one.
It's not.  You could either make it 80% pale malt (I would) or you can adjust all of them slightly to hit 100%.

The missing 5% is torrified wheat or malted wheat

#### kgs

• Brewmaster
• Posts: 953
• Sonoma County, CA
##### Re: Am I mathematically challenged?
« Reply #8 on: January 11, 2013, 08:41:11 AM »
What is the remaining 5% mystery grain?  The recipe only added up to 95%
It's a Heironymystery.

I don't have my copy in front of me, but I remember seeing a recipe that had a percentage of simple sugar to be added late that was listed separate from the grain bill - I wonder if this is the one.
It's not.  You could either make it 80% pale malt (I would) or you can adjust all of them slightly to hit 100%.

The missing 5% is torrified wheat or malted wheat

It would be nice if the publisher created an errata page for this and other books.
K.G. Schneider
AHA Member

#### nateo

• Brewmaster General
• Posts: 2214
• Denver, CO
##### Re: Am I mathematically challenged?
« Reply #9 on: January 11, 2013, 08:51:36 AM »

It would be nice if the publisher created an errata page for this and other books.

IIRC Stan had an errata page on his website for his previous two.
In der Kürze liegt die Würze.

#### morticaixavier

• I must live here
• Posts: 7782
• Underhill VT
##### Re: Am I mathematically challenged?
« Reply #10 on: January 11, 2013, 08:57:25 AM »
What is the remaining 5% mystery grain?  The recipe only added up to 95%
It's a Heironymystery.

I don't have my copy in front of me, but I remember seeing a recipe that had a percentage of simple sugar to be added late that was listed separate from the grain bill - I wonder if this is the one.
It's not.  You could either make it 80% pale malt (I would) or you can adjust all of them slightly to hit 100%.

The missing 5% is torrified wheat or malted wheat

It would be nice if the publisher created an errata page for this and other books.

who needs an errata page when the author will just come on here to enlighten us?

Thanks for taking the time Stan!
"Creativity is the residue of wasted time"
-A Einstein

"errors are [...] the portals of discovery"
- J Joyce

#### stanhieronymus

• 1st Kit
• Posts: 17
##### Re: Am I mathematically challenged?
« Reply #11 on: January 11, 2013, 09:00:09 AM »
What is the remaining 5% mystery grain?  The recipe only added up to 95%
It's a Heironymystery.

I don't have my copy in front of me, but I remember seeing a recipe that had a percentage of simple sugar to be added late that was listed separate from the grain bill - I wonder if this is the one.
It's not.  You could either make it 80% pale malt (I would) or you can adjust all of them slightly to hit 100%.

The missing 5% is torrified wheat or malted wheat

It would be nice if the publisher created an errata page for this and other books.

who needs an errata page when the author will just come on here to enlighten us?

Thanks for taking the time Stan!

Personal apologies are always good, if humbling, but an errata page is also essential. That or don't make the dang mistakes to begin with.

#### tschmidlin

• I must live here
• Posts: 8198
• Redmond, WA
##### Re: Am I mathematically challenged?
« Reply #12 on: January 11, 2013, 10:12:39 AM »
What is the remaining 5% mystery grain?  The recipe only added up to 95%
It's a Heironymystery.

I don't have my copy in front of me, but I remember seeing a recipe that had a percentage of simple sugar to be added late that was listed separate from the grain bill - I wonder if this is the one.
It's not.  You could either make it 80% pale malt (I would) or you can adjust all of them slightly to hit 100%.

The missing 5% is torrified wheat or malted wheat
I'm not sure this guy has any idea what he's talking about

Thanks for the fix Stan
Tom Schmidlin

#### Titanium Brewing

• Assistant Brewer
• Posts: 130
• Westchester, CA
##### Re: Am I mathematically challenged?
« Reply #13 on: January 11, 2013, 10:44:39 AM »
Thank you very much Stan.
AHA #210799

My wife said I was delusional. I almost fell off my unicorn laughing.