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====== Midnight Sun ======
**Style:** Black IPA

Bentleybrau Brewery's Midnight Sun \\

A black IPA made with assorted leftovers from previous batches.  It's complicated.

===== Partial Mash BIAB =====
**Brewed:**  2015-04-12 \\
**Target OG:** 1.066 \\
**Strike hit:** 69C \\
**OG:** 1.072 \\
**FG:** 1.020 \\
**ABV:** 6.83% \\

**BrewTarget Recipe:**
<code>
Midnight Sun - American IPA
================================================================================
Batch Size: 26,678 L
Boil Size: 12,011 L
Boil Time: 70,000 min
Efficiency: 75%
OG: 1,066
FG: 1,017
ABV: 6,3%
Bitterness: 61,5 IBUs (Tinseth)
Color: 30 SRM (Morey)

Fermentables
================================================================================
                            Name        Type    Amount Mashed Late Yield Color
       Weyermann - Pale Ale Malt       Grain  2,000 kg    Yes   No   85%   3 L
                    Biscuit Malt       Grain 750,000 g    Yes   No   79%  23 L
                     Munich Malt       Grain 750,000 g    Yes   No   80%   9 L
 Dry Extract (DME) - Extra Light Dry Extract  2,100 kg     No  Yes   95%   3 L
     Black Barley (Roast Barley)       Grain 150,000 g    Yes   No   55% 500 L
 Weyermann - Dehusked Carafa III       Grain 250,000 g    Yes   No   70% 520 L
           Pale Malt (2 Row) Bel       Grain 250,000 g    Yes   No   80%   3 L
Total grain: 6,250 kg

Hops
================================================================================
                  Name Alpha   Amount     Use       Time   Form  IBU
 Saaz (Czech Republic)  4,5% 40,000 g    Boil 60,000 min Pellet 13,9
               Calypso 13,0% 60,000 g    Boil  5,000 min   Leaf 10,8
             El Dorado 15,0% 75,000 g    Boil    0,000 s Pellet  0,0
                Nugget 13,0% 20,000 g    Boil 40,000 min Pellet 17,6
            Willamette  5,0% 40,000 g Dry Hop 14,000 day Pellet  0,0
                Nugget 13,0% 30,000 g    Boil 10,000 min Pellet 10,9
 Saaz (Czech Republic)  4,5% 40,000 g    Boil 20,000 min Pellet  8,4

Yeast
================================================================================
                      Name Type   Form     Amount   Stage
 Wyeast - Belgian Ardennes  Ale Liquid 125,000 mL Primary

Mash
================================================================================
 Name     Type  Amount     Temp   Target       Time
 BIAB Infusion 8,691 L 78,360 C 69,000 C 60,000 min

Instructions
================================================================================
0) Add 2,000 kg Weyermann - Pale Ale Malt, 750,000 g Biscuit Malt, 750,000 g Munich Malt, 150,000 g Black Barley (Roast Barley), 250,000 g Weyermann - Dehusked Carafa III, 250,000 g Pale Malt (2 Row) Bel to the mash tun.

1) Bring 8,691 L water to 78,360 C for upcoming infusions.

2) Add 8,691 L water at 78,360 C to mash to bring it to 69,000 C. Hold for 60,000 min.

3) You should now have 4,188 L wort. Add 6,500 L water to the kettle, bringing pre-boil volume to 10,688 L.

4) Bring the wort to a boil and hold for 70,000 min.

5) Raise water to boil and then remove from heat. Stir in  2,100 kg Dry Extract (DME) - Extra Light, .

6) Put 40,000 g Saaz (Czech Republic) into boil for 60,000 min.

7) Put 20,000 g Nugget into boil for 40,000 min.

8) Put 40,000 g Saaz (Czech Republic) into boil for 20,000 min.

9) Put 30,000 g Nugget into boil for 10,000 min.

10) Put 60,000 g Calypso into boil for 5,000 min.

11) Put 75,000 g El Dorado into boil for 0,000 s.

12) Stop boiling the wort.

13) Add 2,100 kg Dry Extract (DME) - Extra Light, to the boil at knockout.

14) You should have 8,354 L wort post-boil.
You anticipate losing 0,000 mL to trub and chiller loss.
Add 17,000 L top up water into primary.
The final volume in the primary is 25,354 L.

15) Cool wort and pitch Wyeast - Belgian Ardennes Ale yeast, to the primary.

16) Let ferment until FG is 1,017.

17) Transfer beer to secondary.

18) Put 40,000 g Willamette into fermenter for 14,000 day.
</code>

**Brewday Notes:** \\

Used washed yeast from Ale van der Drupe.  4 months old, 3 jars with ~200ml total yeast slurry.  24 hour 4.25L starter at high krausen with very visible bubbles. \\
Mashed in at 78.4C, stirred for 5 minutes because of lots of dough balls.  Fired for a few seconds, and hit target of 69C perfectly.\\
Extracted 6.5L instead of 4.2L from mash.  Nice! Sparge until got 11L. \\
Boil SG: 1.091 (expected: 1.083) \\
OG: 1.072 (efficiency: 86%) \\
Bubbling twice per second and 1cm krausen @ 6 hours.  Strong yeast. \\

Since starter was 4.25L, it affects efficiency measurements. \\
Actual brewed volume was 21.75L, plus 4.25L starter == 26L. \\
Estimating starter was at 1.015 when pitched: \\
( ( OG1 * V1 ) + ( OG2 * V2 ) ) / ( V1 + V2 ) = OG \\
( (OG * (V1 + V2) ) - (OG2 * V2) )  / V1 = OG1 \\
( (71 * 26) - (15 * 4.25) ) / 21.75 = 82 points (1.082 OG) \\
Using http://www.brewersfriend.com/brewhouse-efficiency/ \\
21.75L @ 1.082 == 84.34% (1.091 max) \\

Bottled 2015-05-09, 120g table sugar.  FG 1.020 @ 20C. \\

**Tasting Notes:** \\