Post #5 made 14 years ago
by lambert
Hi DOTW
Thanks for the info - it's missing some bits and I'm going to give a brief answer - work calls!
Please have a look at the attached sheet - I'll refer to it in the post.
1. You did not specify an OG for the recipe. I've read in your other post that you want to do an APA. The BJCP OG guidelines for an APA is 1.056 – 1.075. Based on the ingredients you've given I'm guessing that teh OG of your original recipe is between 1.056 and 1.058. I've set the OG for the recipe to 1.058 (Tab:Volumes etc, Cell: B11)
2. I've set the Diameter if your kettle to 12.25 (Tab:Volumes etc, Cell: B15)
3. Based on the info you have provided I've calculated your kettle capacity to be 34.3 quarts or 8.57 gals. (I'm assuming the kettle is straight sided!). If you look the value in Cell B26, Volumes etc tab you'll see that the mash volume for the brew will be 9.11gal. So, your kettle is JUST too small for the brew! Fear not, there are various ways around this!
Workarounds:
a) Reduce your brew length (Tab:Volumes etc, Cell: B5) to 4.3gal or lower. See how the value in B26 change? But I suspect that you might like beer and live by the brewers motto of "More is better". If so then have a look at option b.
b) The correct thing to do would be for you to search for Maxi BIAB on the forum and read up on it. It would help for your future brews! I'm going to give you a quick and dirty guide!
- Cell B25 tells you that you need 8.18 gal of water for this brew. Add this in your kettle and bring it up to strike temp (I assume mashing temps somewhere between 149 F and 153 F - strike temp in normally 2C (35.6F) higher than mash temp).
- Once you have reached mash temp remove 1.5gal of water from the kettle (store it in another pot/container).
- Mash in your grains - your mash volume should be around 7.6gal. You can now top the kettle up to the level that you feel comfortable with. I would suggest leaving at least an inch of headspace. Make sure that your mashing temp is still ok - adjust as needed.
- You will be left with some water - my guess is around 1 gal. You can add some of this to the kettle after you have pulled the bag and the remainder after 30 mins of boiling - basically as soon as you have enough space in the kettle. Yes, you can use this water to rince the bag and extract a bit more of the sugar but I don't think the hassle is worth it for your first brew!
Notes:
1. Please have a look at the adjusted grain requirements for your brew on the spreadsheet (Tab: Grain Bill, Cells: G7 to G10). These will change if you change numbers (OG, Brew lenght, etc) on the first tab.
2. You will need to do a bit of work on the Hop Bill tab!
- I've made some assumtions regarding the end of boil volume of the original recipe (assume it's 5 gal - Cell: F6).
- If the original recipe used flowers/leaf instead of pellets then Cell F8 needs to be 100.
- I've entered some ballpark AA% in column E for the hops - if you know the actual AA% of the original brew please overwrite!
- If you are using hops flowers/leaf then change cell N8 to 100%.
- Please enter the the AA of your hops in column L.
- The hops quantities for your brew is provided in column K.
- Just a general note - the BJCP style guidelines for an APA is 40 – 70 IBU's. The calculator uses a different forumla (Tinseth) to calculate IBU's so the 41.5 IBU's you see in Cell N20 is closer to 45 IBU's as per the BJCP guidelines.
Final comment - As a first BAIB brew I would suggest that you try to stay within the ballpark figures - but don't stress too much about the numbers. You will make beer and it will be good (barring an infection during fermentation!).
Enjoy and shout if you need more info.
lambert
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