Batch to Fly

[crookedeyeboy]

If I bought myself a sparge arm and got it all up and running, apart from checking the sg towards the end of sparging how do you know how much liquor to put through? Can you still use the same quantites prescribed using the batch sparge calculators?

[adm]

(Caveat here, as I've never fly sparged, but...)

I think you don't really need to worry so much about the volume calculations. Just sparge until you have collected the correct pre-boil volume that you are looking for - and keep tasting the wort on the way to make sure it still tastes sweet. If it's still sweet, then you can keep going. If it stops tasting sweet, then stop sparging.

(That sees to be the "easy way to do it" wisdom that I've picked up from reading here. I must actually try it one day....)

[WishboneBrewery]

*arse* - What adm said! I'm going to leave what I wrote below

If you boiler is calibrated, stop collecting when you've collected your pre-boil volume.
I'm going to have to have a go at this myself, I need to knock something up to sparge with...hmmm.

[Scooby]

Exactly as above, the finger test as Adm said is the best. Sparge with water at 80c+, stick a thermometer in the grain bed and aim for mid 70s, the sparge loses temp in the spray, and sparge slowly, 23l took me about 45mins