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Am I mathematically challenged?

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Titanium Brewing:
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.

dbeechum:
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.

mabrungard:
What is the remaining 5% mystery grain?  The recipe only added up to 95%

nateo:

--- Quote from: mabrungard on January 10, 2013, 09:45:37 AM ---What is the remaining 5% mystery grain?  The recipe only added up to 95%

--- End quote ---

It's a "choose your own adventure" recipe.

Alewyfe:

--- Quote from: mabrungard on January 10, 2013, 09:45:37 AM ---What is the remaining 5% mystery grain?  The recipe only added up to 95%

--- End quote ---
It's a Heironymystery.