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Messages - a10t2

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2926
Zymurgy / Re: May/June Issue, already?!
« on: April 27, 2011, 03:11:48 PM »
Sweet. I've been checking the mail almost every day waiting for this one. ::)

2927
Equipment and Software / Re: SG/Brix refractometer completely useless?
« on: April 27, 2011, 03:09:51 PM »
I think I'm the one who started this...

With the caveat that I've never actually used one of these and and am working entirely from the pictures I've seen online, yes, the SG scale is inaccurate. The manufacturer appears to have used the "multiply by four" rule, rather than an actual Brix-to-SG conversion. So the Brix scale should be just as accurate as any other refractometer, but the SG scale will only be within one "point" up to about 1.050. As far as I know, the Brix scale is still a pure sucrose measurement, so you'll need to apply a correction factor when measuring wort.

This post has some general information on how to use a refractometer, as does the September 2, 2010 episode of Basic Brewing Radio: http://seanterrill.com/2010/06/11/refractometer-estimates-of-final-gravity/

For FG estimation, I have a recently updated spreadsheet, which glastctbrew linked to earlier: http://seanterrill.com/2011/04/07/refractometer-fg-results/

This *should* give better results than the MoreBeer/ProMash/BeerSmith/what have you formula, although that's also included so that people can verify it for themselves.

2928
All Grain Brewing / Re: Mashing for high gravity
« on: April 27, 2011, 09:00:45 AM »
You might want to use DME instead of LME and the lightest you can get as well. when doing a high gravity the LME can add a lot of unfermentables that can result in an overly sweet beer IMO.

I think that in general LME would be more fermentable, actually. I don't have any personal experience, but that was Ray Daniels' conclusion in Designing Great Beers. He found only one manufacturer's (M&F) syrup was less fermentable than their DME.

2929
All Grain Brewing / Re: Maintaining water temperature...
« on: April 26, 2011, 03:05:54 PM »
I was wondering if my soupy mash contributed to the rapid heat loss.

I think it's more likely that you actually just didn't have a uniform temperature at the beginning and so it was lower overall than the spot you checked. I have that same cooler and I've never seen a mash drop more than ~2°F in an hour.

2930
All Grain Brewing / Re: Forgot mash-out
« on: April 26, 2011, 11:50:53 AM »
That's what I have understood to this point. That's why batch sparging results in small loss of efficiency isn't it?

Right. The more you divide up the sparge into smaller and smaller batches, the more thoroughly it's possible to rinse the grain bed. When fly sparging, the number of "batches" is infinite, so efficiency is maximized.

Well, I think a mash out and sparging with water to keep it just below 170F helps a lot, at least it has in my experience.

That's what I was wondering about - once the mash has fully converted, I'm not sure what the mechanism would be that would improve lauter efficiency based on temperature. Kai even did a batch sparge using cold (15°C) water and the efficiency compared to the hot sparge was about the same. It sounds like your results were different, though. Were the batches otherwise identical?

2931
All Grain Brewing / Re: Forgot mash-out
« on: April 26, 2011, 09:59:56 AM »
Given plenty of time for complete conversion, a mash out would only improve lauter efficiency.

Assuming 100% conversion before beginning lautering, wouldn't the lauter efficiency depend only on how much water is run off, and in what increments?

2932
Beer Recipes / Re: Oktoberfest 2011
« on: April 26, 2011, 09:24:24 AM »
The Wyeast version of the same thing (I don't recall the number offhand) is just fine.  It's just the 820 that's bad.

That would be 2206, FWIW.

2933
All Grain Brewing / Re: Mashing for high gravity
« on: April 25, 2011, 09:46:38 PM »
In order to keep efficiency constant, you have to keep the ratio of mash and sparge liquor to grist weight constant. That means boiling longer to end up with the same final volume. As a practical matter, it's better just to use more grain (or extract, if you prefer) and take the efficiency hit associated with keeping the boil time constant.

2934
All Grain Brewing / Re: Forgot mash-out
« on: April 25, 2011, 08:13:16 PM »
The whole idea behind a mash-out is to fix the fermentability of the wort before starting the sparge. If you're trying to maximize attenuation, some extra time at mash temperature could only help.

2935
All Grain Brewing / Re: Forgot mash-out
« on: April 25, 2011, 06:38:06 PM »
Are you batch sparging or fly sparging?

Regardless, when mashing for high fermentability like that, I don't think you'd want to mash out.

2936
General Homebrew Discussion / Re: Fastest Turnaround Time?
« on: April 25, 2011, 11:41:59 AM »
I just tapped a blonde ale ten days after brewing. I don't really like to carbonate at high pressure, though, so it was actually in the keg on day 6.

2937
The Pub / Re: No Politics, just the news
« on: April 25, 2011, 11:35:22 AM »
Scientist are also in agreement that NO AMOUNT of ionizing radiation is safe.

There's nowhere near universal consensus, actually. http://cat.inist.fr/?aModele=afficheN&cpsidt=13517659

To say nothing of the fact that anyone concerned about that level of exposure should not be flying at all, ever. http://www.ncbi.nlm.nih.gov/pubmed/21444831

2938
The Pub / Re: No Politics, just the news
« on: April 25, 2011, 09:18:15 AM »
Not true. All airports don't have scanners and if you set off the metal detector, for any reason, you're going to get groped.

That hasn't been my experience. Generally you get a second (and sometimes a third, or fourth, or...) try through the metal detector, and if you still can't figure out what's setting it off they break out the little metal-detecting wand. If THAT is still picking up something, and they can't tell what it is, you get invited to the little room.

2939
The Pub / Re: What Has Happened to Education?
« on: April 24, 2011, 07:54:38 PM »
How do you feel about run-on sentences?

Me? I find them annoying, but I don't actually see them used all that often. I think most people understand conjunctions more or less intuitively.

2940
The Pub / Re: What Has Happened to Education?
« on: April 24, 2011, 05:51:53 PM »
I was a solid D student in English and find errors in everthing I read anymore, especially ebooks.

That isn't what "anymore" means. The word you're looking for is "now", or - my personal preference - "nowadays".

I know, there are no rules in English, and things that were once slang are now standard usage, but that one really irks me, and I figured since we're talking about grammar...

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