Brew Number 108

• Brew Craft's "Pintail" APA (20934)
• Safale US-05 yeast

Kit contained

• 1.7kg Brewcraft APA
• 1.7kg Light liquid malt
• 2 x 150g cracked Crystal grain
• 25g Cascade hops
• 25g Amarillo hops (for dry hopping)
• 11.5g Safale US-05 yeast

Brought out to 21L in Fermzilla.

The yeast has an apparent attenuation of 78-82% If that is so the final gravity should be...

FG = (SG - 1000) * (1 - AA/100) + 1000 
   = ((1047 - 1000) * (1 - 80/100)) + 1000
   = 1009.4

Date	Measured SG	Temperature	Corrected SG	Brix	Notes
10/02/2020 23:00	1044	33.0	1047	12.2%	Spunding valve set to 25 PSI
15/02/2020 15:00	1017	20.0	1017		Added Amarillo hops
22/02/2020 15:00	1008	20.0	1008	6.8%
23/02/2020 14:00	1007	20.0	1007	5.8%	Cold crashed, ABV 5.0%
23/02/2020 19:00		2.0			Kegged

Notes

• Yeast pitched at 28C
• Temperature set at 19C.
• Spinding valve set to 25 PSI (IPA should have 2.1 - 2.6 volumes of CO2 which is 7-13 PSI at 4C and 22-30 PSI at 19C)
• ABV = 1.646 * RI – 2.703 * (145 – 145 / SG) – 1.794 = 1.646 * 5.8 – 2.703 * (145 – 145 / 1.007) – 1.794 = 5.0%

Appendix

• BrixConversion
• Refractometer calculator
• BrewCalculator
• Carbonation Calculator
• HydroCorrection
• Grafana plots (SG here appears wrong, dead due to recorder plugin deleting old data)
• ABV measurements

-- Main.darius - 10 Feb 2020