Brew Day: The Black Russian-July 5, 2007

Brewday: The Black Russian - July 5, 2007

Recipe Values:

Volume to fermenter[ltr (gal)]:	25.00	Total volume[ltr (gal)]:	28.74	Losses [ltr (gal)]:	3.74
Original Gravity[SG]:	1.072	Colour [SRM(EBC)]:	34.22(67.41)
Mash Efficiency [%]:	75.00%	Bitterness[IBU]:	34.69

Preboil Values:

Mash water volume [ltr (gal)]:	25.45 (6.72)	Mash tun volume [ltr (gal)]:	33.95 (8.97)	Mash tun loses [ltr (gal)]:	2.00 (0.53)
Preboil wort volume [ltr (gal)]:	31.00 (8.19)	@ mash out temp.	31.74 (8.38)	Preboil gravity [SG]:	1.058

Postboil Values:

Evapouration [ltr (gal)]:	4.00 (1.06)	Evapouration Rate [ltr (gal)/hr]:	4.00 (1.06)	Boil time [Minutes]:	60.00
Postboil wort volume [ltr (gal)]:	28.74 (7.59)	@ boiling temp.	29.94 (7.91)	Boiler lose [ltr (gal)]:	2.00 (0.53)
Postboil target gravity [SG]:	1.074	mash items only	1.066

Style: 12C. Baltic Porter

Description:

This was my first and sadly to date only go at this style.

Managed best of show at Vicbrew 2007 so not a bad drop all things considered.

Estimated Original Gravity[SG]: 1.074	Estimated Final Gravity[SG]: 1.017	Alcohol By Volume[%]: 7.70
Bitterness [IBU]: 34.69	Colour [SRM(EBC)]: 34.22 (67.41)
Balance: 1.029	BU:GU ratio: 0.468

Fermentables

Type	Gravity [SG]	Gravity(%)	Weight [gms (lbs)]	Weight(%)
Ale Malt (Barrett Burston)	1.046	62.52%	5901.68 (13.01)	64.83%
Brown Sugar, Dark	1.008	10.41%	574.84 (1.27)	6.31%
Caraaroma Malt (Weyermann)	1.002	2.84%	268.26 (0.59)	2.95%
Carafa Special Type 1 (Weyermann)	1.001	1.38%	160.96 (0.35)	1.77%
Chocolate Malt (Bairds)	1.001	1.62%	160.95 (0.35)	1.77%
Crystal Malt Dark (Bairds)	1.003	3.67%	380.64 (0.84)	4.18%
Molasses	1.000	0.65%	45.99 (0.10)	0.51%
Munich I Malt (Weyermann)	1.008	11.08%	1073.03 (2.37)	11.79%
Wheat Malt (Barrett Burston)	1.004	5.83%	536.52 (1.18)	5.89%

Hops

Hop Utilisation Method: Rager

Type	AA(%)	IBU	IBU(%)	Weight [gms (oz)]	Time(minutes)
Hallertau Hersbrucker	4.25%	9.35	26.96%	22.99 (0.81)	60.00
Perle	8.25%	15.43	44.49%	19.54 (0.69)	60.00
Tettnang	4.50%	9.90	28.55%	22.99 (0.81)	60.00

Yeast

Type	Flocculation	Attenuation	Min Temp[C (F)]	Max Temp[C (F)]	Alcohol Tolerance
Bavarian Lager - Wyeast 2206	medium-high	75.00%	8.00 (46.40)	14.00 (57.20)	9% ABV

Estimated required yeast cells (billion):

675.00

Dried yeast (gm):	35.90

No of liquid yeast(Wyeast/Whitelabs) packs:	7.18	(Assumes 94% viability)

Approximate amount of solid slurry (ml):
One hour settling	957.45	(Assumes 25% trub and 94% viability)
One day settling	478.72	(Assumes 25% trub and 94% viability)
Longer than 1 week settling	250.00	(Assumes 25% trub and 80% viability)

Note yeast viability reduces greatly over time as demonstrated in the table below.

Age	Viability	Age	Viability
1 week	80%	2 weeks	70%
3 weeks	60%	4 weeks	50%
5 weeks	40%	6 weeks	25%
7 weeks	15%	8 weeks or older	less than 10%

Viability deterioration varies greatly between different yeast strains. You should consider doing a yeast starter for any yeast older than 2 weeks to ensure yeast viability prior to pitching.

Liquor to grist ratio [ltr/kg]:

Saccrification rest - 3.00 to 4.00 [ltr/kg] is recommended.

A lower liquor to grist ratio will produce a less fermentable wort (with more complex sugars) while a higher liquor to grist ratio can result in a more fermentable wort.

Both extremes will require a longer rest time ( up to 90 minutes )

Protein rest - less then 2.50 [ltr/kg] is recommended.

Mash Schedule

Name	Method	Step temp [C (F)]	Step time [minutes]	Addition amount [ltr (gal)]	Addition temp [C (F)]	Liquor/grist ratio [ltr/kg]
Saccrification	Direct	67.00 (152.60)	60	0.00 (0.00)	0.00 (32.00)	3.20

Mash Details

Mash water required [ltr (gal)]:	25.45 (6.72)	Mash tun volume required [ltr (gal)]:	33.95 (8.97)
Grain Weight [gms (lbs)]:	8482.04 (18.70)	Mash gravity @ 100% conversion [SG]:	1.078

Number of batches:

General:

Minimum required efficiency:	75.00 %	Max expected efficiency	79.60 %

Sparges:

Sparge No	Water addition [l]	Expected recovered volume [l]	Required gravity	Max expected gravity
1	2.82	15.50	79.67	89.31
2	15.50	15.50	35.99	40.34
Combined	18.32	31.00	57.83	64.82

Assumed constants:

The following are assumed in calculations below and will eventually be able to be set.

Absorption [l/kg]:	1.3	Grain displacement [l/kg]:	0.67