AG#3 - "Iams Max"

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AG#3 - "Iams Max"

Postby crispylettuce » Tue Jan 13, 2015 15:37

First brew of the new year is now in the fermenter. It was delayed a day due to weather - which sounds bonkers as I brew inside - but the high winds and horizontal rain is not a good combination with open windows!

Fairly simple recipe - I’m still trying to work out my defaults and how to adjust my recipes accordingly. I know BIABarcus spreadsheet can help with this but I dont think it’s the most user friendly to use. Currently I use BrewMate to help with recipes, and have a brew day checklist and record sheet I made myself. For some reason my boil off rate was much higher this time which left me a little short in the FV.

Couple of questions:
For any BIAB'ers - How much do people “squeeze” the mash bag when draining?
When im making my recipes, should i include the water i know im going to loose as trub (ie left in the boiler) as the basis for my grain bill? So if i have a recipe for 19l, and i know i will leave 2litres in my boiler, should i scale up the grain bill from 19l to 21l?

AG_3 - Iams Max
Standard/Ordinary Bitter

Recipe Specs
Batch Size (L): 19.0
Total Grain (kg): 3.621
Total Hops (g): 28.00
Original Gravity (OG): 1.042 (°P): 10.5
Final Gravity (FG): 1.011 (°P): 2.8
Alcohol by Volume (ABV): 4.13 %
Colour (SRM): 8.3 (EBC): 16.3
Bitterness (IBU): 25.3 (Average - No Chill Adjusted)
Brewhouse Efficiency (%): 70
Boil Time (Minutes): 90

Grain Bill
3.373 kg Pale Ale Malt (93.15%)
0.248 kg Crystal Malt (6.85%)

Hop Bill
28.0 g Challenger Pellet (5.8% Alpha) @ 90 Minutes (Boil) (1.5 g/L)

Misc Bill
Campden Tablet
3.0 g Irish Moss @ 10 Minutes (Boil)

Single step Infusion at 66°C for 90 Minutes.
Fermented at 20°C with Safale S-04

Based on GW_BYOBRA - Bass Draught

+ Brewed on 11 Jan'15
+ Volume before adding grain = 30.26Litres
+ Volume at start of mash = 32.82Litres
+ Measured PH at start of mash = 5.4
+ Volume at start of boil = 27.35Litres
+ Measured Gravity at start of boil = 1.032 (predicted end of boild gravity = 1.039)
+ Volume at end of boil = 19.78Litres
+ Measured Gravity at end of boil = 1.04

+ Calculated Grain Absorbtion Rate = 0.92L/kg
+ Calculated Boil off Rate = 5.05L/hr (~18.4% evaporation)
+ Trub measured at 2 litres

Recipe Generated with BrewMate

Grain and boiler ready to go…

Getting up to temperature…

Keeping the mash as constant temp as possible. More difficult on a cold day for sure!

Draining the mash bag… How much do people “squeeze” the bag when draining?

Cooling procedure underway with my fan – no immersion cooler for me! SG measured – a little under.

And finally, the least stressful part of brewday (well day after) – cleaning up!
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