AG#32 Texas Brown Ale – Continuity Error

I recently blogged about my intention to brew a Texas Brown Ale.  More about it here.

Here’s the writeup from the brewday last week (28/02/14).  This beer is destined for the Northern Craft Brewers & Saltaire Brewery bar.  Brown hoppy craft cask ale.  No filtration, no pasteurisation, no pressurisation, no vitriol. 

wpid-storageemulated0DCIMCamera2014-02-26-19.14.18.jpg.jpgOriginal Gravity (OG): 1.048
Final Gravity (FG): 1.010
Alcohol (ABV): 5.1%
Colour (EBC): 50.4
Bitterness (IBU): 48.9 (Average)

3.30kg Golden Promise Pale Malt (Simpsons)
0.50kg Biscuit Malt (Dingemans)
0.25kg Dark Crystal Malt
0.25kg Chocolate Malt
0.25kg Pale Wheat Malt (toasted)

10g Columbus (Tomahawk) (16.5% Alpha) @60 minutes from the end (boil)
12g Brewer’s Gold (7.5% Alpha) @30 minutes from the end (boil)
88g Brewer’s Gold (7.5% Alpha) @10 minutes from the end (boil)
50g Columbus (Tomahawk) (16.5% Alpha) @0 minutes from the end (boil)
100g US Cascade (pellets) (5.8% Alpha) dry hop

Safale US05  yeast.

Strike temp of 75C, 12.0L liquor for 4.55kg grain. Mashed in at 65C (single step infusion).   Mashed for 75 minutes.   First runnings 1.090.  Sparged at 76C 19.0L liquor.  Collected 24L at 1.046. 60 minute boil.  

I collected 17L of wort, post boil, with an OG of 1.056.  Liquored back with 2.0L cooled boiled water to 19L with an OG of 1.048

Pitched US05 yeast starter at 19C.

Update: 03/03/14  1.040 

I’ll be transferring to secondary and adding 100g US Cascade pellets for 3-5 days.

Update: 12/03/14  FG 1.012 (4.8%) Dry hopped with 100g US Cascade pellets (in primary).

N.B. My last brewday led me to look at my efficiencies.  I got in a right muddle and was rescued by a professor of brewing, loosely associated with Stringers Brewery.  I applied the prof’s maths to my numbers from this brew. And I calculated my Mash Efficincy as 80% and my Brewhouse Efficiency as 69%.  Workings out, below. 

Pale malt: 3.5 kg @ 293 L.deg per kilo = 1025.5
Biscuit malt: 0.5 @ 273 = 136.5

Dark crystal malt: 0.25 kg @ 275 = 68.75
Chocolate malt: 0.25 @ 273 = 68.25

wheat malt: 0.25 @ 296 = 74.0

Total potential extract 1025.5 + 136.5 + 68.75 + 68.25 +74.0 = 1373 litre.degrees

My runnings from the mash were 24 litres at 1.046 Specific Gravity, so: 24 litres x 46 degrees = 1104 litre.degrees

My mash efficiency is something like…
 1104/1373 = 0.804 = 80%

Post-boil, I ended up with…
17L @ 1.056 i.e 17 x 56 = 952 and 952/1373 = 0.693
That is 69.0% which I’m calling my brewhouse efficiency.

 A couple of photos:

The grist

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The toasted wheat malt

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First runnings from the mash

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The final colour

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AG#31 Raspberry Blonde

It’s been a while (AG#31 British Hopped IPA, still to write up).  This one is my entry for the Northern Craft Brewers & Saltaire Brewery competition.  

“The Homebrew Competition is to brew a speciality beer:
It could contain Herbs, Spices, Vegetables, Fruit but the idea is you get a 5th ingredient to compliment and add to the Water – Malt – Hops – Yeast”.

I decided to play it safe and go with a simple recipe.

Original Gravity (OG): 1.044
Final Gravity (FG): 1.010
Alcohol (ABV): 4.46%
Colour (EBC): 7.3
Bitterness (IBU): 24 (Average)

2.800 kg Golden Promise Pale Malt
0.800 kg  Pale Wheat Malt

10g Amarillo (8.7% Alpha) @60 minutes from the end (Boil)
30g Amarillo (8.7% Alpha) @10 minutes from the end (Boil)
50g Amarillo (8.7% Alpha) @0 minutes from the end (Boil)
1.400 kg Raspberries (from frozen) in secondary for 5 days

WLP001 California Ale Yeast.

Strike temp of 74C, 9.0L liquor for 3.600kg grain. Mashed in at 66C (single step infusion).   Mashed for 60 minutes.   First runnings 1.082.  Sparged at 76C 19.8L liquor.  Collected 24L at 1.040. 60 minute boil.  Amarillo in at 60 minutes (from the end of the boil), followed by additions at 10 minutes and 0 minutes.

I collected 18L of wort, post boil, with an OG of 1.044.

Pitched WLP001 California Ale Yeast starter at 19C.

Update: 10/02/14  1.024 

I’ll be transferring to secondary and adding 1.400 kg of raspberries (bought forzen and defrosted).

Update: 16/02/14 – Added 1.4kg raspberries to 18L. The FG was higher than expected at 1.014, making the beer nearer 4.0% abv

Update: 22/02/14 – transferred off raspberries. 15L.

Update: 28/02/14 – bottled 15L primed with 75g sugar syrup (5g/L to achieve 2.5 vols).

Not the most intersting of brewdays, or recipes, but the beer will hopefully be well balanced, with the raspberries the star of the brew.  This was a straightforward recipe, and I managed to make a note of most of my volumes and gravity readings, so thought I would try and understand ‘efficiency’ a little better.  My current understanding is poor, and it’s one of those things that I think “I’ll worry about it next time”.  To make things more confusing, an online calculator gave me one answer, and my calculation based on ‘the maths’ (edit: 12/02 – removed Brew Your Own, & Brewer’s Friend links – see update below), gave me a different answers (see below).  What I have learnt is that efficiency can be measured at each stage of the brew, and that my system, the water profile and the grist will affect efficiency.  I definitely want to get to the point where I can use efficiency calculations and brewing records to influence my brewday planning; but until I’m in a position where I have a brewkit that’s not botched together with whatever I can borrow, I’m not going to get hungup on grist and water treatment variables, too much.  Having a degree of certainty around temp and liquor losses should come first, right?

Back to this brew (I might brave a post on efficency another time).  I asked Twitter to help me out with my efficiency confusion, and the ever-reliable folk helped me out.  Thanks to; @hopsinjoor @RoostersOl @Jimthebrewer @BigAdeBrewing @Dunloptired and @tw05ers for their suggestions.   Al (@hopsinjoor) kindly shared his brew spreadsheet, which I’ll use when I have my kit ‘dialled in’

As ever, thanks for reading, and your comments are – almost – always welcome.  I’m sure there will be comments, as my understanding of efficiency; and the calculations above will be riddled with mistakes.  Hopefully, with practice, reading and comments, I’ll be able to put a more useful post together at some point.

Edit: 12/02 – see comments on efficiency:

The product of volume and gravity in brewers degrees.
For instance…
10 litres at SG 1.040 = 10 x 40 = 400 Litre.degrees.

The maltsters give laboratory extracts for the malts which you might  think of as the extract 1 kg would give in 1 litre. If that were actually possible. For decent pale malts this is probably around 300 (assuming a coarse crush / moisture as is).

That’s to say, one kg of malt mashed under ideal conditions would give you 1 litre of wort with a gravity of something like 1.300.

So, for an example homebrew mash:

Pale malt: 2.8 kg @ 293 L.deg per kilo = 820.4
wheat malt: 0.8 @ 296 = 236.8

You can get these values for extract from a recent malt analysis, but you can look up typical values on the InterWeb , or you could call it 300 and wouldn’t be far wrong.

Total potential extract 820.4 + 236.8 = 1057.2 litre.degrees

What you actually get out of the mash might be 24 litres at 1.040 Specific Gravity, i.e…
24 litres x 40 degrees = 960 litre.degrees

So your mash efficiency is something like…
 960/1057.2 = 0.908 = 90.8%

Post-boil, you might end up with…
 18L @ 1.044 i.e 18 x 44 = 792 and 792/1057.2 = 0.749
That is..74.9% which you might call brewhouse efficiency.

“Thanks Prof!” – full post and source here.

 
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