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Results from The Calculator: Need some confirmation

Post #1 made 14 years ago
by hobbydog
I am new to BIAB. Here is a recipe for thehomebrewerforum.co.uk which I am interested in. I have done some conversion to a miniBIAB using The Calculator. Am I on the right track? Need some input. Thanks.

My parameters:

1. Pot volume: 19L
2. Pot diameter: 30.5
3. As I have not brewed before, I am using 75% for efficiency.
4. The AA for the hops from my LBS is Fuggles: 4.6% and East Kent Goldings: 4.8%
5. My planned brew size is 9L

Here's the original recipe:

Source: http://www.thehomebrewerforum.co.uk

Parameter Value Units
Recipe Name: Poltergeist Porter
Published: Yes
Style: English Ordinary Bitter
Brew Length: 23 L
Efficiency: 75.0 %
Mash Minutes: 50 Minutes
Mash Water Ratio: 2.5 L/kg
Mash Temperature: 68.0 °C
Boil Minutes: 60 Minutes
Yeast: Safbrew Speciality Ale - (T-58)

Fermentables:
Name Type Weight (grams) % Weight % Extract Add after boil
Pale Malt - Maris Otter Grain 4000 87.7 89.2 No
Caramel/Crystal Malt - 120L Grain 300 6.6 6 No
Chocolate Malt Grain 260 5.7 5.5 No


Bittering Hops:
Name Weight (grams) % Weight %AA Mins IBU % IBU
Fuggles 35 63.6 4.4 60 16.3 60.6
Goldings, East Kent 20 36.4 5.0 60 10.6 39


Aroma Hops:
Name Weight (grams) Mins
Fuggles 15 15


Calculated values:
Parameter Value Units Description
Expected OG: 1044 points The expected starting gravity points, e.g. 1054 points
Expected FG: 1012 points The expected finishing gravity points, e.g. 1007 points
Expected ABV: 4.3 % The expected alcohol content based on OG and FG
Expected IBU: 26.8 IBU The expected bitterness, e.g. 34.6 IBU
Expected SRM: 28.0 SRM The expected colour in SRM units, e.g. 13.1 SRM

I have attached the results from The Calculator.


Cheers,

SL
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Post #2 made 14 years ago
by PistolPatch
Welcome to the forum hobbydog :peace:

You've done a great job with The Calculator :salute:.

I've had a look at the original recipe and it seems by Brew Length there, they mean the end of boil volume. So, what I've done in your file is, on the Hop Bill sheet changed cell E8 to 23.

I've also changed a few other things on the Hop Bill Sheet. I removed any values you had in E11-E13 as we don't really know what IBU system the original recipe is using*. It's better to rely on weights if you know the end of boil volume. Finally I added in the weight and time of the aroma hops.

So, that should be good to go now. Best of luck with it :luck:,
PP

* Just looking now though and it seems they are using the same version as is used in The Calculator so the way you had it set up would have worked well enough for the first two hops although all you need in that case is to just fill out column E - no need to worry about B and C :peace:).
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