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Messages - a10t2

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1
Quote
It's probably because his equation wrong, "grafted" to the experimental data. He used merely data for "well-fermented beer", and thus had little and poorly stratified data, which culminated poorly designed coefficients.

No, it's because in the data set I was working with (89 data points from eight breweries - two of them "professional", since that apparently carries some weight), it wasn't possible to generate a mathematically rigorous curve that fit both fermenting wort and gave hydrometer-level precision (±0.05°P) for FG.

2
All Grain Brewing / Re: Boil temps - do they matter?
« on: Today at 08:25:32 AM »
Most homebrewers boil off far too much simply due to small volumes and (relatively) large burners. Just how much boiloff is necessary is system-dependent (elevation, kettle geometry, calandria vs. natural convection vs. recirculation, etc.) but 5-10% is definitely all that's needed to volatilize DMS. FWIW, I boil off ~12% on my 6 gal batches because that's the lowest I can throttle my burner while still getting a clean flame.

A longer or more vigorous boil can be desirable in certain situations where the Maillard products are essential to the beer (doppelbock e.g.), but boiling off 2.5 gal in a 5-10 gal batch is probably just wasting fuel.

3
Equipment and Software / Re: Coleman 52 quart conversion to mash tun?
« on: January 16, 2017, 08:48:43 AM »
im brewing on a budget and i cant afford the bag too at this point.

If money's that tight, why not buy just the bag and hold off on making a mash tun?

4
Yeast and Fermentation / Re: 2 stage yeast starter
« on: January 12, 2017, 02:52:55 PM »
Although if I needed 400 billion cells starting from a pack, I'd just make a 2.5 L starter.

5
General Homebrew Discussion / Re: Denver, Colorado
« on: January 12, 2017, 11:04:49 AM »
Since you don't have any specific breweries in mind, I'd get a day pass for the light rail ($5-9 depending on how far out of downtown you'll be) and stick to places within walking distance. Just off the top of my head:

Wynkoop - solid brewpub, big beer list, across the street from Union Station where you'll probably change trains, and which is worth a quick visit in its own right
Falling Rock - the (huge) original location is right on the 16th St pedestrian mall a few blocks away
Lowdown - maybe too hop-focused, but good apps/pizza and a nice patio, plus the owners/brewers are great
Declaration - huge beer list, food trucks, probably the best beer garden in town

If you do a little more walking on Broadway south of downtown around Declaration, you have Former Future (sours/barrel aged stuff), Grandma's House (average beer, hilarious decor), and TRVE (good beer, bring earplugs), any of which is worth a quick stop if only for the ambiance.

If you are staying on the west side (Lakewood, Golden) it's about a 20 minute drive to Tommyknocker in Idaho Springs.

Even on dry roads, that's more like 40-60 min. But the drive up US 6 is well worth it, and puts you right next to Cannonball Creek. ;)

If you're coming up that far and have the time, might as well carry on to Summit County where you have seven breweries off the same exit.

6
Obviously it depends on gravity and minimally on temperature, but the average would be around 20 volumes of CO2 per volume of wort. You'd need a spunding valve on the receiving keg as well.

7
Equipment and Software / Re: Bar Build: Draft Tower - Chest Freezer?
« on: January 11, 2017, 10:07:14 PM »
FWIW, I have seven taps on a tower on my chest freezer. I used long machine screws to hold it to the lid; I think maybe I epoxied it for safety but it's been so long I don't really remember. As it happened the spacing for the tower was the same as an 80mm PC fan so two of the bolts are also holding that in place.

8
Going Pro / Re: Helpful Bachelor's Degree
« on: January 03, 2017, 06:38:24 PM »
I'd definitely go for something on the business side. The mechanics of brewing are simple, and since you don't need to pitch your resume to an employer, the actual degree doesn't matter. Get the most out of your free classes and study the brewing part on your own time.

9
The Pub / Re: Movie soundtracks
« on: January 03, 2017, 06:22:24 PM »
   I meant to include the qualifier of soundtracks that had an original score written specifically for the film. Would you listen to your suggested best just as a work of music, driving in your vehicle or sitting in your easy chair reading a homebrew magazine?

In that case, it is without question Basil Poledoris's The Hunt for Red October. As runner up I'll take Evita.

10
If I'm interpreting this correctly, adding ";all" to the URL of the Unread link should do what you want:

https://www.homebrewersassociation.org/forum/index.php?action=unread;all

11
Kegging and Bottling / Re: Keg Pressure Regulator Advice
« on: December 13, 2016, 03:19:26 PM »
SOP for setting a regulator:

Close valve to keg(s).
Turn down regulator until it reads zero and/or begins leaking gas.
SLOWLY increase to desired pressure.
Open valve to keg(s).

If the needle doesn't come back up to the set point within a few minutes, the regulator is defective or you're out of gas.

12
All Grain Brewing / Re: Lower brewhouse efficiency
« on: December 13, 2016, 11:45:47 AM »
Which will lower your efficiency by collecting less wort.  Round and round we go....

True, but probably not by a significant amount on a moderate-gravity beer.

13
All Grain Brewing / Re: Lower brewhouse efficiency
« on: December 13, 2016, 10:50:40 AM »
Pre boil gravity was around 1.050
Gravity going into the fermentor was 1.059
Preboil volume was around 8.1 gallons

Assuming those numbers are correct, your post-boil volume was ~6.9 gal, and the problem is simply starting with too much wort in the kettle. If the recipe you're brewing is based on a 5 gal volume, then you need to start with ~6.2 gal to boil down to that (based on 1.2 gal boiloff for this batch).

14
All Grain Brewing / Re: 1st runnings gravity reading
« on: December 11, 2016, 08:58:27 AM »
The chart should work pretty well. If you want to plug in some different assumptions I have a calculator that's a little more flexible: http://seanterrill.com/batchsparge

15
All Grain Brewing / Re: Lower brewhouse efficiency
« on: December 11, 2016, 08:10:30 AM »
What was the pre-boil gravity? Yes, it will increase throughout the boil as water evaporates. What was the post-boil volume?

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