Brew Day: chalky - Foreign Extra Stout-September 4, 2010

Brewday: chalky - Foreign Extra Stout - September 4, 2010

Recipe Values:

Volume to fermenter[ltr (gal)]:	24.00	Total volume[ltr (gal)]:	27.73	Losses [ltr (gal)]:	3.73
Original Gravity[SG]:	1.070	Colour [SRM(EBC)]:	68.53(135.00)
Mash Efficiency [%]:	75.00%	Bitterness[IBU]:	40.00

Preboil Values:

Mash water volume [ltr (gal)]:	24.35 (6.43)	Mash tun volume [ltr (gal)]:	32.72 (8.64)	Mash tun loses [ltr (gal)]:	2.00 (0.53)
Preboil wort volume [ltr (gal)]:	30.00 (7.93)	@ mash out temp.	30.71 (8.11)	Preboil gravity [SG]:	1.056

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)]:	27.73 (7.33)	@ boiling temp.	28.89 (7.63)	Boiler lose [ltr (gal)]:	2.00 (0.53)
Postboil target gravity [SG]:	1.076	mash items only	1.064

Style: 13D. Foreign Extra Stout

Description:

Based on Micheal Hillery's milk stout recipe.

Estimated Original Gravity[SG]: 1.076	Estimated Final Gravity[SG]: 1.016	Alcohol By Volume[%]: 7.98
Bitterness [IBU]: 40.00	Colour [SRM(EBC)]: 68.53 (135.00)
Balance: 1.190	BU:GU ratio: 0.528

Mash schedule

Name	Type	Temperature [C (F)]	Time [Minutes]
Sacchrification	infusion	67.00 (152.60)	60

Fermentables

Type	Gravity [SG]	Gravity(%)	Weight [gms (lbs)]	Weight(%)
Ale Malt (Barrett Burston)	1.048	63.64%	5924.18 (13.06)	65.82%
Barley Roasted Malt (Bairds)	1.004	5.93%	782.98 (1.73)	8.70%
Brown Sugar, Dark	1.009	12.38%	673.91 (1.49)	7.49%
Chocolate Malt (Bairds)	1.003	3.32%	325.34 (0.72)	3.61%
Crystal Malt Dark (Bairds)	1.004	5.30%	542.23 (1.20)	6.02%
Golden Syrup	1.002	2.09%	116.19 (0.26)	1.29%
Molasses	1.001	1.34%	92.95 (0.20)	1.03%
Oats, Flaked	1.005	6.01%	542.23 (1.20)	6.02%

Hops

Hop Utilisation Method: Tinseth

Type	AA(%)	IBU	IBU(%)	Weight [gms (oz)]	Time(minutes)
Millennium	14.40%	40.00	100.00%	42.08 (1.48)	60.00

Yeast

Type	Flocculation	Attenuation	Min Temp[C (F)]	Max Temp[C (F)]	Alcohol Tolerance
American Ale - Wyeast 1056	medium-low	75.00%	15.00 (59.00)	22.00 (71.60)	10% ABV

Estimated required yeast cells (billion):

315.00

Dried yeast (gm):	16.76

No of liquid yeast(Wyeast/Whitelabs) packs:	3.35	(Assumes 94% viability)

Approximate amount of solid slurry (ml):
One hour settling	446.81	(Assumes 25% trub and 94% viability)
One day settling	223.40	(Assumes 25% trub and 94% viability)
Longer than 1 week settling	116.67	(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]
Sacchrification	Infusion	67.00 (152.60)	60	24.35 (6.43)	73.29 (163.92)	3.00

Mash Details

Mash water required [ltr (gal)]:	24.35 (6.43)	Mash tun volume required [ltr (gal)]:	32.72 (8.64)
Grain Weight [gms (lbs)]:	8116.95 (17.89)	Mash gravity @ 100% conversion [SG]:	1.075

Number of batches:

General:

Minimum required efficiency:	75.00 %	Max expected efficiency	79.73 %

Sparges:

Sparge No	Water addition [l]	Expected recovered volume [l]	Required gravity	Max expected gravity
1	2.93	15.00	76.82	86.39
2	15.00	15.00	34.59	38.90
Combined	17.93	30.00	55.71	62.64

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