I have a question about IBU calculation with FWH method. When i use a single "noble" hop, i use the formula given in helles book or in your great document about LODO. I set a ratio of 30% and a ammount of IBU, easy to use
If i want to use a bitter hop like magnum or perle in combo with low AA hop for arom, then how i can calcul weight of each both hop ? Actually, i set a ratio (30% for exemple) and an ammount of IBU (30 for ex), compute the weight of low AA hop i need. And i convert to bitter hop with a ratio like low AA/high AA. If i want use a more complex hopping program, i cant calcul global IBU and part of FWH with weight of each hop additions.
30 IBU, 30% with an hersbrucker @ 2% AA, 50L batch -> (30 x 50) / (1000 x 0.02 x 0.3) = 250g of hersbrucker. I want remplace 70% of hersbrucker (175g) with a magnum @ 10% AA -> (175 x 0.02) / 0.1 = 35g ??? i dont know if it correct or totally fail ^^
In my mind, i imagine FWH hops boil with bitter hop, so in my recipe software (software doesn't support FWH), i configure my FWH hops with a full time boil (like 80 minutes). In some document, i read FWH equivalent to 20 minutes boil. And in LODO doc, it tell if you raise ratio of FWH, you lowering bitterness -> i conclude, FWH give less bitter than a full time boil ?
TL NR -> My question is : IBU of a FWH is equivalent of how many minutes of boil hopping ?
I hope my english is human readable
Thank you, Gamb.
Statistics: Posted by Gamb — Tue Aug 02, 2016 9:05 am
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