Lagering- how fast to drop the temp and two other quesitons
Posted: Sat Mar 24, 2007 10:32 am
I'm getting ready to transfer a new sub-style of maibock (I call it "Shit, that's pretty damn brown for a blond MaiBock") into a corny for lagering. I'm just hyped it fermented, the first lager I tried seemed to be contaminated to me at the time so I dumped it.
So, the beer is at room temperature on the yeast for a diacytl rest... when I checked the gravity I had a taste and it was very clean, so I guess diacytel rest may not have been necessary, but wtf, I guess I'm superstitious or something.
Question here: I've seen/heard two general ideas about dropping to lagering temps- one is to drop the temperature slowly (2-5 deg a day) and one is to just drop the temperature.
A. I have not transferred to the corny yet.. so do I put the fermenter back in the freezer, drop temp (slow or fast) to lager temp, then transfer into the chilled corny? Or do I transfer at room temp to corny, then drop temp (slow or fast).
B. Is there a scientific reason for a slow temp drop, or is this just "how its always been done"?
Another question - should I have transferred to a seconday before hitting final lagering gravity? Palmer says when you're about 3/4 to your fg you should transfer... is that just to avoid oxygenation issues by transferring when the yeast is active?
Fianl question - if I save and clean the yeast from this batch, will it last long enough to make another bock in a couple months?
So, the beer is at room temperature on the yeast for a diacytl rest... when I checked the gravity I had a taste and it was very clean, so I guess diacytel rest may not have been necessary, but wtf, I guess I'm superstitious or something.
Question here: I've seen/heard two general ideas about dropping to lagering temps- one is to drop the temperature slowly (2-5 deg a day) and one is to just drop the temperature.
A. I have not transferred to the corny yet.. so do I put the fermenter back in the freezer, drop temp (slow or fast) to lager temp, then transfer into the chilled corny? Or do I transfer at room temp to corny, then drop temp (slow or fast).
B. Is there a scientific reason for a slow temp drop, or is this just "how its always been done"?
Another question - should I have transferred to a seconday before hitting final lagering gravity? Palmer says when you're about 3/4 to your fg you should transfer... is that just to avoid oxygenation issues by transferring when the yeast is active?
Fianl question - if I save and clean the yeast from this batch, will it last long enough to make another bock in a couple months?