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**Baron von BeeGee** · 03-29-2006, 04:06 PM

Quote:

Originally Posted by david_42

Widgets are pre-loaded with a drop of liquid nitrogen. It's then popped into the bottle and capped, so when the N2 vaporizes, it stays in the widget. There isn't any way to reuse them.

I'm not too sure about that. Do you have a link? From looking at the patent and the way the widget functions I think it's possible it would work, but without any empirical evidence I don't think it's possible to say for sure. Unless you've tried it.

**Walker** · 03-29-2006, 04:08 PM

link to the patent:
http://www.delphion.com/details?&pn=US04832968__

and to a thread where we talked about it:
http://www.homebrewtalk.com/f39/use-guinness-bottles-6364/

waskelton4 · 03-29-2006, 04:47 PM

Quote:

Originally Posted by Imperial Walker

A drop if liquid nitrogen is put into the beer, and the bottle is sealed. The increasing pressure in the bottle pushed beer into the widget, compressing the air or nitrogen that was in the 'empty' widget.
-walker

so you can actually force cabonate a bottle of beer with a drop of liquid nitrogen?

m_f · 03-29-2006, 04:56 PM

Quote:

Originally Posted by waskelton4

so you can actually force cabonate a bottle of beer with a drop of liquid nitrogen?

we've discussed this before and I said I'd try...

talk to my buddy in the lab. he works with liq N2 alot (freezing cow embryos).

I also did some research and math. Practical problem is this:

a tiny amount of liq N2 becomes a huge amount of gas when vaporized. so it would be easy to overpresurize. a " shot" of liq N2 is more than enough to make an instantaneous glass granade.

I asked my friend how could I put a single drop of liqN2 in a bottle and there is no simpe answer.
a syringe: imposible.
a spoon? very hard, easy to overdose!

we have to do some experiments when he can get some n2 from the lab but I am not as exited as before.

I'd recomend very low co2 carbonation for the bottle and the syringe trick to get the creamy guinness head. I'm actively working on that now

... my friend is providing the syringes hahahaha!

**Walker** · 03-29-2006, 05:10 PM

Quote:

Originally Posted by waskelton4

so you can actually force cabonate a bottle of beer with a drop of liquid nitrogen?

No, that's not what I am saying. I think nitrogen doesn't dissolve very well (can anyone confirm that?)

The nitrogen is there MAINLY to increase pressure in the head-space of the bottle. When this happens, beer will be forced into the widget so that the pressure in the headspace and the pressure inside the widget are equal.

-walker

El Pistolero · 03-29-2006, 05:12 PM

Quote:

Originally Posted by Imperial Walker

We don't think you need liquid nitrogen, because the pressure from normal carbonation should force beer into the widget to get the desired effect in the end.

We agreed with you right up to that point, but we don't feel that the slow pressure increase from natural carbonation will fill the widget, meaning we feel that the liquid nitrogen is necessary to provide the rapid pressure buildup.

We also feel that we need to go wee.

**Walker** · 03-29-2006, 05:15 PM

Quote:

Originally Posted by El Pistolero

We agreed with you right up to that point, but we don't feel that the slow pressure increase from natural carbonation will fill the widget, meaning we feel that the liquid nitrogen is necessary to provide the rapid pressure buildup.

We also feel that we need to go wee.

why does it need to be FAST building pressure? SLOW building pressure should also work, right?

maybe I missed something in that old thread.... need to go re-read.

-walker

**Baron von BeeGee** · 03-29-2006, 05:21 PM

Hopefully nobody actually tries this so we can continue discussing it!

**Walker** · 03-29-2006, 05:24 PM

I was actually about to bump my espresso stout forward in the line-up to test it.

El Pistolero · 03-29-2006, 05:26 PM

Quote:

Originally Posted by Baron von BeeGee

Hopefully nobody actually tries this so we can continue discussing it!

I was driving down the road yesterday, and right in front of me there's a pickup carrying a tank of liquid nitrogen. I immediately sped up to go around him, thinking I'm gonna cut him off, run him off the road, and take his nitrogen. Fortunately that very thought came to mind...why ruin a good thread with facts.

Quote:

Originally Posted by Imperial Walker

why does it need to be FAST building pressure?

I think a rapid buildup of pressure is required to force the fluid into the widget. If that wasn't the case, nitro wouldn't be needed, they could just put the widgets into the bottle and feel them at pressure like normal bottles.