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I have created a monster - Nathan
February 22nd, 2004
10:03 pm
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I have created a monster
OG: 1.064 (potential ABV 9%)
IBUs: 41*

This will be interesting.

*(I think. The OG is higher than I expected, which will change the utilization factor in the IBU calculation).

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From:bluepapercup
Date:February 22nd, 2004 10:06 pm (UTC)
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Would you mind explaining all that for the beer-disabled? thank you :)
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From:nathanw
Date:February 23rd, 2004 06:08 am (UTC)

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Ah, yes. After four hours around steaming kettles, I forget that there's a world outside of them...

OG is "original gravity", the specific gravity of the unfermented beer (wort) after boiling. Most of what's dissolved in the wort are various sugars, so this number also corresponds to a potential amount of alcohol production if all the sugar was to be fermented. It usually isn't, though, because not all of the sugars are fermentable by a given strain of yeast; a typical finishing gravity (FG) is 1.015-1.020, so this beer will likely end up with 5-6% alcohol by volume. The OG is measured either with a hydrometer or a refractometer. I called it a monster because the beers I've brewed before have been in the 1.045-1.055 range.

IBUs are "International BItterness Units", and describe how much bitterness is in the beer (though not how bitter it tastes, because that's both subjective and dependant on the balance with body and alcohol). It depends on the alpha acid contents of the hops (5-8%, and usually specified when you buy them), how long they are boiled in the kettle (10 minutes to two hours), and the gravity of the boil, since more dissolved sugar makes it more difficult to isomerize and dissolve the alpha acids (decreased utilization). Unfortunately, IBUs can't be directly measured at the homebrewer level, just guessed by plugging all those other numbers into some calculations. 41 IBUs is also high.

Re-doing my calculations, I think it's more like 31-35, which is probably better.
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From:eisenbud
Date:February 23rd, 2004 06:09 pm (UTC)

details

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What sort of beer will it be, aside from strong?
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From:nathanw
Date:February 23rd, 2004 08:07 pm (UTC)

Re: details

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Well, the intent was for it to be a fine-tuning of the American pale ale that won the prize, so that I can make a good batch for the MCAB, but it's now pushing well into IPA territory.
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From:nathanw
Date:February 23rd, 2004 08:17 pm (UTC)

Re: details

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Hm. According to the BJCP, it's too strong for APA and in the right strength range for IPA, but kind of low on the bitterness for IPA. I think that leaves it in some kind of BJCP limbo. Maybe dry-hopping will put it firmly back into IPA territory.
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