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BrewBlog: RavenWood Kolsch

Specifics

Style:

Category:	Light Hybrid Beer
Number:	06C

A clean, crisp, delicately balanced beer usually with very subtle fruit flavors and aromas. Subdued maltiness throughout leads to a pleasantly refreshing tang in the finish. To the untrained taster easily mistaken for a light lager, a somewhat subtle pilsner, or perhaps a blonde ale.

Commercial Examples: Available in Cologne only: PJ Früh, Hellers, Malzmühle, Paeffgen, Sion, Peters, Dom; import versions available in parts of North America: Reissdorf, Gaffel; Non-German versions: Eisenbahn Dourada, Goose Island Summertime, Alaska Summer Ale, Harpoon Summer Beer, New Holland Lucid, Saint Arnold Fancy Lawnmower, Capitol City Capitol Kölsch, Shiner Kölsch.

Brewer:

Chad Haatvedt

Brew Date:

August 18, 2012

Yield:

9 gallons

Calories:

161 (12 ounces)

ABV:

ABW:

4.7%

Batch No:	2012-08-18
OG:	1.050
OG (Plato):	12.39° P
Target OG:	1.048
Reading 1:	1.006 (8 days)
FG:	1.005
FG (Plato):	1.28° P
Target FG:	1.010
Real Extract:	3.29° P
App. Atten.:	89.6%
Real Atten.:	73.4%
Status:	Conditioning

General Information

Method:	All Grain

Method:

All Grain

Recipe from Northern Brewer

Kegged the Kolsch on October 1st. This is one fine Kolsch.

Comments

Hit my numbers right on the money.

Fly sparged again, and hit 75% brewhouse efficiency.

Calories, Alcohol, and Plato Calculator

Original Gravity:	1.050
Final Gravity:	1.005
Initial Gravity (Plato):	12.39° P
Final Gravity (Plato):	1.28° P
Real Extract:	3.29° P
Apparent Attenuation:	89.6%
Real Attenuation:	73.4%
Alcohol By Volume (ABV):	6%
Alcohol By Weight (ABW):	4.7%
Calories (12 ounces):	162
Calculations derived from Peter Ensminger's article Beer Data: Alcohol, Calorie, and Attenuation Levels of Beer, here.

Scale Recipe

Enter desired final yield (volume):

gallons

Malts and Grains

19.50 pounds

German Pilsen Malt (2-Row)

Color (L):	1.5 °L
Info/Use:	Light color, malty flavor. For pilsners, lagers.

100% of grist

19.50 pounds

Total Grain Weight (Water Amounts

Water Amounts

Target Final Boil Volume:	9 gallons
Evaporation Rate:	1.5 gallons per hour
Boil Time:	60 minutes
Runoff Volume Needed:	10.9 gallons	9 gallons (final boil volume) ÷ 0.96 (cooling) + 1.5 gallons (boil evaporation)
Grain Amount:	19.5 pounds
Grain Absorbtion:	4.2 gallons
Total Water Needed:	16 gallons	10.9 gallons (runoff) + 4.2 gallons (grain absorbtion) + 1 gallons (equip. loss)
Mash Water Needed:	6.5 gallons	based on 1.33 quarts per pound of grain
Sparge Water Needed:	9.5 gallons	16 gallons (total water) – 6.5 gallons (mash water)

)

100% of grist

Non-Fermentables

2 tabs	Whirlfloc @ 15 minutes
2 tbl	Irish Moss @ 15 minutes

Hops

2.00 ounces

Tradition

Region:	Germany
AAU Range:	5 - 7%
Notes:	Fine, subtle aroma similar to Hallertau.
Typical Use:	Aroma, bittering
Substitution:	Liberty, Hallertau
Example:	Lager, Pilsner, Bock, Wheat, Weizen

6.5% Pellets @ 60 minutes
Type: Bittering
Use: Boil

13 AAUs

2.00 ounces

Hersbrucker

Region:	German
AAU Range:	2 - 4%
Notes:	Aroma: Mild, pleasant, floral slightly fruity Typical beer styles: Lager, Pilsner, Bock, Weizen Bock, Wheat, Belgian Style Ales, Munich Helles, Kolsch
Typical Use:	Aroma
Substitution:	Mt. Hood,

2.3% Pellets @ 30 minutes
Type: Bittering
Use: Boil

4.6 AAUs

4.00 ounces

Total Hop Weight

17.6 AAUs

Boil

Total Boil Time:	60 minutes

Total Boil Time:

60 minutes

Yeast

Name:	Kolsch Yeast
Manufacturer:	Wyeast
Product ID:	2565
Type:	Ale
Flocculation:	Low
Attenuation:	75%
Temperature Range:	56–64°F
Amount:	250 ml

Mash Profile

Cereal Mash and Single Infusion Mash

Grain Temperature:	72°F	Tun Temperature:	72°F
Sparge Temperature:	168°F	PH:	5.4
PPG:	28	Efficiency:	77.8%
Notes:	Boil cereal adjuncts to add to infusion mash.

Steps

#	Name	Type	Time	Temp.	Description
1	Protein Rest	Infusion	30 min.	104°F	Add 30% of mash water at 111° F / 44° C
2	Protein Rest	Infusion	45 min.	122°F	Add 10% of mash water at 181° F / 83° C
3	Saccharification	Infusion	60 min.	150°F	Add 25% of mash water at 200° F / 93° C
4	Mash Out	Infusion	10 min.	168°F	Add 35% of mash water at 208° F / 98° C

Procedure

Water Amounts Calculator

Target Final Boil Volume:	11 gallons
Evaporation Rate:	1.5 gallons per hour
Boil Time:	60 minutes
Runoff Volume Needed:	12.96 gallons	11 gallons (final boil volume) ÷ 0.96 (cooling) + 1.5 gallons (boil evaporation)
Grain Amount:	20 pounds
Grain Absorbtion:	4 gallons
Total Water Needed:	18.46 gallons	12.96 gallons (runoff) + 4 gallons (grain absorbtion) + 1.5 gallons (equip. loss)
Mash Water Needed:	6.25 gallons	based on 1.25 quarts per pound of grain
Sparge Water Needed:	12.21 gallons	18.46 gallons (total water) – 6.25 gallons (mash water)

Strike Water Temperature Calculator

Grain Weight:	20 pounds
Grain Temperature:	79° F
Strike Water Amount:	6.25 gallons
Target Mash Temperature:	152° F
Equipment Loss:	0° F
Strike Water Temperature:	163.7° F

YEAST : Wyeast 2575 Kolsch II 2 smack packs

Special Procedures

Racked to Secondary on August 26th after 8 days. Only got 8.5 gallons yield.

Racked to Secondary on August 26th after 8 days. Only got 8.5 gallons yield.

Fermentation

Primary:	8 days @ 68° F
Secondary:	7 days @ 64° F
Lager:	30 days @ 40° F

Tasting Reviews

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