water bag usage

[Echo]

Given the record setting soaring weather in the mid-south and southeast this year, does anyone have any experience inflating their water ballast bags so as to be used for a flotation device? Seems like the only way to use them. That's what they're for right? By the way, how do you thermal in the rain? Has anyone ever calculated a polar for an ASW20 fitted with a float kit? Thanks :)

E

[Peter Scholz[_3_]]

Am 13.08.2013 18:51, Echo wrote:
> Given the record setting soaring weather in the mid-south and southeast this year, does anyone have any experience inflating their water ballast bags so as to be used for a flotation device? Seems like the only way to use them. That's what they're for right? By the way, how do you thermal in the rain? Has anyone ever calculated a polar for an ASW20 fitted with a float kit? Thanks :)
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Actually I did inflate my water bags a couple of years ago to test for
any leaks. I was amazed what 0.2 bar will do to those bags. They could
well have been used to construct a floating device, provided we
wouldhava had a pond around, and more suitable weather (was around
freezing point outside...). And yes, they did hold the pressure for 12
hours, so they're back in the wings now.

--
Peter Scholz
ASW24 JE

[lynn]

On Tuesday, August 13, 2013 11:51:02 AM UTC-5, Echo wrote:
> Given the record setting soaring weather in the mid-south and southeast this year, does anyone have any experience inflating their water ballast bags so as to be used for a flotation device? Seems like the only way to use them. That's what they're for right? By the way, how do you thermal in the rain? Has anyone ever calculated a polar for an ASW20 fitted with a float kit? Thanks :)
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Perhaps filling the hags with helium would be more productive?

[lynn]

On Tuesday, August 13, 2013 3:18:56 PM UTC-5, lynn wrote:
> On Tuesday, August 13, 2013 11:51:02 AM UTC-5, Echo wrote:
>
> > Given the record setting soaring weather in the mid-south and southeast this year, does anyone have any experience inflating their water ballast bags so as to be used for a flotation device? Seems like the only way to use them. That's what they're for right? By the way, how do you thermal in the rain? Has anyone ever calculated a polar for an ASW20 fitted with a float kit? Thanks :)
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> Perhaps filling the hags with helium would be more productive?

Of course I meant BAGS not HAGS, but filling hags with helium would be fun to watch.

[kirk.stant]

On Tuesday, August 13, 2013 10:24:58 PM UTC+2, lynn wrote:

> > Perhaps filling the hags with helium would be more productive?
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> Of course I meant BAGS not HAGS, but filling hags with helium would be fun to watch.

And to listen to!

Kirk
66

[Ralph Jones[_3_]]

On Tue, 13 Aug 2013 13:18:56 -0700 (PDT), lynn >
wrote:

>On Tuesday, August 13, 2013 11:51:02 AM UTC-5, Echo wrote:
>> Given the record setting soaring weather in the mid-south and southeast this year, does anyone have any experience inflating their water ballast bags so as to be used for a flotation device? Seems like the only way to use them. That's what they're for right? By the way, how do you thermal in the rain? Has anyone ever calculated a polar for an ASW20 fitted with a float kit? Thanks :)
>>
>>
>>
>> E
>
>Perhaps filling the hags with helium would be more productive?

Well, let's see. An AS-W20 holds 120 kg of water, so the volume of the
bags is 120 liters.

The density of sea-level air is 1.28 grams per liter, and helium is
0.179. So the lift you'll get is 120L * (1.28g/L - 0.179g/L)=132.5
grams or about 4.7 ounces.

We'll listen to your voice on the radio and tell you if you have a
helium leak...;-)