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RavenWood Kolsch

From the BrewBlog of BorealBrewers – Grand Rapdis, Minnesota USA
Printed April 20, 2018

Specifics
Style: Kolsch
Brewer: Chad Haatvedt
Brew Date: August 18, 2012
Yield: 9 gallons
Calories: 161 (12 ounces)
ABV: 6%
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
BJCP Style Info: Kolsch
O.G.: 1.044 - 1.050
F.G.: 1.007 - 1.011
ABV: 4.4 - 5.2%
Bitterness: 20 - 30 IBUs
Color: 3.5 - 5 SRM
Info: 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.

General Information
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.

Malts and Grains
19.50 pounds German Pilsen Malt (2-Row) 100% of grist
19.50 pounds Total Grain Weight 100% of grist
Non-Fermentables
2 tabs Whirlfloc @ 15 minutes  
2 tbl Irish Moss @ 15 minutes  
Hops
2.00 ounces Tradition 6.5% Pellets @ 60 minutes
Type: Bittering
Use: Boil
13 AAUs
2.00 ounces Hersbrucker 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
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.

Fermentation
Primary: 8 days @ 68° F
Secondary: 7 days @ 64° F
Lager: 30 days @ 40° F
RavenWood Kolsch
Date Brewed:  
Brewer/Assistant:  
Brew Day Data
  Target Actual
Strike Water Amount: 6.5  
Strike Water Temperature:    
Mash Temperature:    
Mash Time:    
Sparge Water Amount: 9.5  
Sparge Water Temperature:    
Pre-Boil Gravity:    
Pre-Boil Amount: 10.9  
Post-Boil Amount: 9  
Boil Time: 60  
Original Gravity: 1.050 / 12.4° P  
     
     
     
     
Brew Day Notes
 

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