Brew Number 127

• Twøbays Centennial IPA (Gluten Free) (Brewfather version)

Ingredients

• 4.8kg Pale Millet Malt
• 1.5kg Goldfinch Millet Malt
• 600g Crystal Rice Malt
• 1.25kg Biscuit Rice Malt
• 200g Cane Sugar
• 110g Centennial hops (10% AA)
• 40g fuggles (4.4% AA)
• 1.8g / 0.5g gypsum
• 3.8g / 1.1g calcium chloride
• 1.8g / 1.1g epsom salt
• 30mL Beta-glucanase
• 30mL Alpha-amylase
• 10mL Glucoamylase
• 4g Yeast nutrient
• 1.5g Whirlfloc G
• 2 x Llaleman 97 west coast ale yeast packets
• Sachet of Mangrove Jacks Liquid Finings

Used Brewzilla for mashing.

Process

• Milled millet twice to ~0.75mm.
• Milled rice twice to ~0.95mm.
• Brought 24.5L of water to 85C.
• Add malts & salts.
• Stir on and off for 20 minutes.
• Cooled to 50C.
• Add 30mL of beta glucanase, stiring for 30 minutes.
• Add 30mL of alpha amylase and 10mL glucoamylase, set temperature to 80C for 120 minutes.
• Sparge with 5.9L water.
• Started boil.
• Added 40g Centennial.
• After 45 minutes add 30g Centennial.
• After 10 minutes add 30g Centennial.
• Boil for 5 mins more.
• Turn off heaters.
• Chill wort.
• Pump to fermenter filtered with muslin bag.
• Cooled to 20C and pitch yeast.
• Dry hop for 5 days with fuggles (ran out of centennial)

Used enzyme dosages from GF home brewing tutorial, seem high but there are plenty of enzymes..

Ended up with 20L in Fermzilla.

Brew house efficiency calculated at 63.6% (18.4 ppg)

The yeast has an apparent attenuation of 81% If that is so the final gravity should be...

FG = (SG - 1000) * (1 - AA/100) + 1000 
   = ((1080 - 1000) * (1 - 81/100)) + 1000
   = 1015

Date	Measured SG	Temperature	Corrected SG	Brix	Notes
24/07/2021 18:30	1080	20.0	1080
02/08/2021 15:00	1018	20.0	1018		Dry hopped
07/08/2021 21:00	1016	20.0	1018		Cold crashed
09/08/2021 16:30	1016	20.0	1018		Kegged

Notes

• Yeast pitched at 20C.
• Temperature set at 20C.
• Used iSpindel3.
• Spunding valve set to 20 PSI (ale should have 2.3-2.6 volumes of CO2, used 2.0 to try and stop the iSpindel leaking).
• ABV = 1.646 * RI - 2.703 * (145 - 145 / SG) - 1.794 =
• Grafana plot

Appendix

• BrixConversion
• Refractometer calculator
• BrewCalculator
• Carbonation Calculator
• HydroCorrection
• ABV measurements

-- Main.darius - 23 Aug 2021