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HAWK21M
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Ballasts - Liquid Used.

Wed Jul 11, 2007 12:57 am

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What is the liquid used in these Ballasts & what weight.
regds
MEL

[Edited 2007-07-10 17:58:23]
I may not win often, but I damn well never lose!!! ;)
 
aeroweanie
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RE: Ballasts - Liquid Used.

Wed Jul 11, 2007 1:26 am

Typically, water is used. Its cheap and nonflammable.

Besides fluids, I've also seen lead shot and cat litter used as ballast.
 
Dougloid
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RE: Ballasts - Liquid Used.

Wed Jul 11, 2007 1:45 am

Quoting AeroWeanie (Reply 1):
Besides fluids, I've also seen lead shot and cat litter used as ballast.

When I worked for Garrett, new Falcon Jets came from France with lead plates (looked like battery scrap) and French beach sand.

Nobody wanted the lead plates so I took them home and started filling up the bottom of a gun safe. When I moved from the basin in 1983 I took all the plates to a salvage buyer and got myself five or six hundred bucks for my collection which was quite extensive..
If you believe in coincidence, you haven't looked close enough-Joe Leaphorn
 
WingedMigrator
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RE: Ballasts - Liquid Used.

Wed Jul 11, 2007 1:18 pm

Quoting HAWK21M (Thread starter):
What is the liquid used in these Ballasts & what weight.

I think it was A380 test pilot Jacques Rosay who said Bordeaux down one row, and Bourgogne down the other row.  Big grin
 
KELPkid
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RE: Ballasts - Liquid Used.

Wed Jul 11, 2007 1:33 pm

Quoting WingedMigrator (Reply 3):
I think it was A380 test pilot Jacques Rosay who said Bordeaux down one row, and Bourgogne down the other row.

Better hope that the pilots aren't sampling the merchandise before flight...  drunk  Then again, maybe France and the JAA don't have the 8-hour rule  silly 
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HAWK21M
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RE: Ballasts - Liquid Used.

Wed Jul 11, 2007 5:14 pm

Quoting AeroWeanie (Reply 1):
Typically, water is used. Its cheap and nonflammable.

Why not use Gravel.
regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
XT6Wagon
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RE: Ballasts - Liquid Used.

Wed Jul 11, 2007 6:24 pm

Quoting HAWK21M (Reply 5):
Why not use Gravel.

Water is a good balast to use as its super easy to handle, and even better you can use a transfer system to move it around in flight so you can evaluate multiple CG configurations in a single trip. Oh and what are you going to do when you are testing MTOW takeoffs and want to land without flying around for 14hrs? Water balast is very easy and safe to dump overboard to bring the wieght below max landing wieght.
 
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HAWK21M
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RE: Ballasts - Liquid Used.

Wed Jul 11, 2007 11:48 pm

Quoting XT6Wagon (Reply 6):
Water balast is very easy and safe to dump overboard to bring the wieght below max landing wieght.

How would the dump occur.Is there a routed over boad drain like the Galley drains.
regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
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autothrust
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RE: Ballasts - Liquid Used.

Wed Jul 25, 2007 5:35 pm

I readed in a Magazine about A380 test flights and a Airbus test pilot declared its glycerin and not water. Because it doesnt freeze which means it keeps almost always the same weight unlike water.
“Faliure is not an option.”
 
airfoilsguy
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RE: Ballasts - Liquid Used.

Wed Jul 25, 2007 6:27 pm

Quoting AutoThrust (Reply 8):
Because it doesnt freeze which means it keeps almost always the same weight unlike water.

Water changes weight?  eyebrow 
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autothrust
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RE: Ballasts - Liquid Used.

Wed Jul 25, 2007 8:00 pm

Quoting Airfoilsguy (Reply 9):
Water changes weight

Well thats what i've readed when water freezes it gets a little havier, with all the ballasts on the A380 it can make a diffrence. Please correct me if 'm wrong.

[Edited 2007-07-25 13:04:18]
“Faliure is not an option.”
 
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SEPilot
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RE: Ballasts - Liquid Used.

Wed Jul 25, 2007 8:10 pm

Quoting AutoThrust (Reply 10):
Well thats what i've readed when water freezes it gets a little havier, with all the ballasts on the A380 it can make a pretty diffrence.

It doesn't change weight (read mass); it changes density, which is a factor if it is floating in water but not in an airplane. Now if you were building an airplane that converts into a submarine you would have to worry about it unless the water/ice was completely contained in the sealed fuselage, where the only effect would be a miniscule increase in air pressure due to the larger volume of ice over water. However, I have not heard anyone propose such a beast, so I wouldn't worry about it.
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autothrust
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RE: Ballasts - Liquid Used.

Wed Jul 25, 2007 8:27 pm

Quoting SEPilot (Reply 11):

It doesn't change weight (read mass); it changes density, which is a factor if it is floating in water but not in an airplane.

Thanks for the info, i agree as i just checked myself this is right. However it was Uwe Rapsmeier Airbus Test Pilot which said its glycerin and not water. So if it isnt the weight why they would use glycerin instead of water?  Confused

Anyway i will search the article.
“Faliure is not an option.”
 
XT6Wagon
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RE: Ballasts - Liquid Used.

Wed Jul 25, 2007 8:31 pm

Quoting AutoThrust (Reply 12):
Thanks for the info, i agree as i just checked myself this is right. However it was Uwe Rapsmeier Airbus Test Pilot which said its glycerin and not water. So if it isnt the weight why they would use glycerin instead of water?

thermal issues I am sure. IE your tanks don't burst when cold soaking it or whatever.
 
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SEPilot
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RE: Ballasts - Liquid Used.

Wed Jul 25, 2007 9:37 pm

Quoting XT6Wagon (Reply 13):
thermal issues I am sure. IE your tanks don't burst when cold soaking it or whatever.

 checkmark 
I think you've got it.
The problem with making things foolproof is that fools are so doggone ingenious...Dan Keebler
 
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HAWK21M
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RE: Ballasts - Liquid Used.

Wed Jul 25, 2007 9:40 pm

Quoting AutoThrust (Reply 12):
So if it isnt the weight why they would use glycerin instead of water

Thats an Interesting observation.I wonder why.
regds
MEL
I may not win often, but I damn well never lose!!! ;)

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