small batch IIPA not brewed yet.. warning: long

08-08-08 SMALL BATCH IPA #3

I realized that all previous calculations were for 1 gallon, when actually I ended up with 2. So.. it gets even more expensive:

Ingredients bought $:
10 lbs British Maris Otter Malt $19.00
1 lb German/ Weyermann Caramel Wheat Malt $2.25
1 oz. Centennial pellets 9.1 AAU $3.50
1 oz. Amarillo pellets 8.2 AAU $3.50
1 oz. Willamette pellets 5.8 AAU $3.50
1 packet Safale 05 American pale ale yeast $6
3 lbs Muntons Extra light DME $17.50 = justin case

Recipe Formulation:

80% Maris Otter
20% Wheat

Efficiency = about 70%
Wort at end of boil: 2 Gallons

Target Gravity: 96 GU.
Total Gravity = 96 x 2 gallons = 192 GU

Proportion amounts
Maris Otter: 192 x .80 = 153.6 = 154 GU
Wheat: 192 x .20 = 38.4 = 38 GU

Pounds needed
Maris Otter: 154 / 38 /.70 = 5.78 lbs
Wheat: 38 / 38 / .70 = 1.43 lbs

only have one pound wheat. changing ratio

85% Maris Otter
15% Wheat

Proportion amounts
Maris Otter: 192 x .85 = 163.2 = 163 GU
Wheat: 192 x .15 = 28.8 = 29 GU

Pounds needed
Maris Otter: 163 / 38 / .70 = 6.13 lbs
Wheat: 29 / 38 / .70 = 1.09 lbs

Since i only have 1 lb I'll bump up the 2 row:

Maris Otter: 6.25 lbs
Wheat: 1 lb

Hops guess:
.5 oz Centennial 75 min
.5 oz Centennial 30 min
1 oz amarillo at turnoff
1 oz willamette dry hop (split into two 1 Gal fermenters)

Woz x U% x A% x 7489 divided by:
Vgal x Cfactor

so,

.5 x .34 x .091 x 7489 = 115.85
divided by
2.5 x 1.2 = 3

Cfactor = 1 + [ (Gboil - 1.050) / 0.2 ] = roughly, 1.2 (Gboil - start or end? going with start)

115.85 / 3 = 39 IBU for .5 oz Centennial 75 min

.5 x .24 x .091 x 7489 = 81.78
divided by 3 = 27 IBU for .5 oz Centennial 30 mn

1 x .06 x .082 x 7489 = 36.85
divided by 3 = 12 IBU for 1 oz Amarillo at turnoff

Total IBU = 39 + 27 + 12 = 78

Maybe call it a 76er? :fro:
(these are rough calculations, and from what i've read average folk can't differentiate +- 5 IBUs, except for maybe Coors light drinkers ...and what the hell do they know?)



If you made it this far, any comments at all are welcome

I think you should download beersmith

thanks for the tip! I'll give it a try when the mac version comes out. I just picked up the book "Designing Great Beers" and was all excited to do the math.

That's cool! I wanna learn the math side of things. Maybe I'll pick up that book.

$17.50 for 3# DME? Are you buying local? Keystone Homebrew Supply in Montgomeryville on 309 has it for $13.50

It's good to have a decent understanding of the math. Helpful for that last minute run to the LHBS on the way home from work when you forgot what your grainbill is! (assuming no brewing software at work and filtered web access)

Wow. The HBS in salt lake sells DME for as cheap as 3.25 a pound. you're getting ripped off dude.

Is 70% efficiency your confirmed brewhouse eff? If not I would shoot for a little more base malt to insure you reach your intended gravity. If you overshoot you can always up the IBU's to match your BU/GU ratio.

Are you buying local? Keystone Homebrew Supply in Montgomeryville on 309 has it for $13.50

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Good to know... thanks

Wow. The HBS in salt lake sells DME for as cheap as 3.25 a pound. you're getting ripped off dude.

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the price is high, i agree. But I can walk there, and the owners are pretty cool. I think a lot of the price is due to the location and size.

Is 70% efficiency your confirmed brewhouse eff? If not I would shoot for a little more base malt to insure you reach your intended gravity. If you overshoot you can always up the IBU's to match your BU/GU ratio.

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Thats what the DME is for

thanks again for the advice

I would use something besides willamette with those hops but that's me. Centennial or columbus maybe. Cascades and amarillo alone would be killer.

With that grainbill you should be able to runoff an extra 4 gallons and do a bitter with the willamette. (partigyle style)

that is a great idea! But before I get excited, I must remember that SWMBO has laid down the law. And shes right, there's no room for more equip in the apt. Especially with a little girl on the way!!!!! (1st)

I like your ideas about the hops. I'm thinking that I might eliminate the willamette, because at this point 2 hops are easier to learn from than 3. I'll do a third of an oz. of amarillo at turnoff, then dry-hop the rest. Maybe move more of the centennials to the 75 min addition to make up for the bitterness.