Using Beersmith to calculate hops am i doing it right?

[kiwijimbob]

Hi guys

I've recently downloaded and bought Beersmith and am slowly getting the hang of using it. I just wanted to check whether I'm doing the right thing.

The recipe I've worked out is:

Black Rock IPA kit
600g dex
600g LDME
250g maltodex
plus hops

I used the equation in in the Partial Boil - Extract Brewing topic by Kevinlis

x = volume of water you will boil, eg: 4Lt
y = batch volume, eg: 23LT
z = total amount of fermentable sugars to be used in the batch, eg 3 kilos
f = amount of fermentable sugars to be used in your boil, eg: 522g

f = (x/y)*z

Different malts and sugars will yield different amounts of final solids so we can not assume 100% across the board.

Kit = 1.7 kilos of LLME which yields 78% to the batch or 1.326 kilos
LLME is another 1.5 kilos at 78% yielding 1.17 kilos
LDME at 95% yields 475g
Dex is 500g because it yields 100%

to work out that using a 4L boil I need to boil 430g of LDME.

The kit has 16 IBUs

and the hop schedule I want to use is:

20g Chinook (12.4%AA) @ 20min = 16.5 IBU
10g Amarillo (8.2%AA) @5min = 1.8 IBU
10g Chinook (12.4%AA) @5min = 2.7 IBU
total IBU from hops = 21.1
plus IBU from kit=16

total IBU = 37.1

Have I done all this right? Is the IBU enough for an English IPA.

Does this recipe sound right?

Have I missed something??

Thanks for your help guys!

Jimmy

EDIT - made total IBU more clear

[James L]

it sounds about right... i'm guessing from your calcs you are doing a 20L brew?

Using those hops varieties wont give you an english IPA, but it should give you a nice american Pale Ale...

You can see whether the recipe you have created is within the guidlines of the style by choosing the beer style in beersmith, just below where you name your beer. There will be a list.

Its a shame you couldnt use all Malt instead of dex, but it should turn out great none the less...

[warra48]

With total IBUs of 58, you are in the style of an American IPA, rather than a Pale Ale.
Definitely not English. For that you would have to use Goldings, Fuggles, Bramling etc.
Should be a good beer if you like them hoppy.

[kiwijimbob]

Thanks for the quick replies guys!

I can do it without the dex if you think that would be better?

I had intended to do a 23 litre brew.

American Pale Ale is all good with me.

I do like them hoppy!

warra48 - Where did you calculate total IBUs of 58? I thought it was a total of 37.1?

Thanks again for the help guys!

[homebrewer79]

plus IBU from kit = 37.1

I think he means the total is 37.1, but when I read it first time I was a little confused because I was adding up all the = he had, and thinking, MMMMM very hoppy