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I could not think of any use for the word "ullage" until I found this on the Internet"
Basically, the ullage is the gaseous part of a container when partially
filled with a liquid. A sealed soda bottle has a small ullage of C02 at
the top. Rocket tanks often contain a pressurized ullage of helium to help
deliver the propellant to the engine under pressure. And helium is often
chosen because it's light and non-reactive.
In zero-G, there is no "top" for the ullage to rise to, so prior to an
engine restart, small jets give the rocket a small boost forward which
allows the liquid propellant to settle back to the bottom of the tank.
John Broman
Beginner satellite observer
Professional rocket builder
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From transcript of a space mission:
[Cernan - "At ignition, the tanks were about three quarters full of fuel and one quarter pressurized helium. The trouble was that, in zero gravity, you didn't know where the fuel was in the tank. Therefore, you had to apply a little acceleration and drive the heavy (that is, denser) fuel downward towards the outlet, towards the engine, so that, when you started the main engine you don't get a fistful of helium. Because we were flying with the landing gear and the main engine forward, to get proper ullage we had to fire the RCS jets briefly against that forward motion. We had the computer programmed to fire the thrusters for a few seconds prior to ignition; but, if Jack hadn't confirmed ullage, I would have used the handcontroller to give us manual ullage."
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so does the vessel have to be a closed system in order for it to have ullage? ullage seems from these excerpts (and BTW, thanks Dr. Bill!) to have a great deal more to do with quantifiable pressure and such than simple volume of space unoccupied by liquid, as i had imagined it to be this morning when i first heard the word.
would it, then, be incorrect usage to say that the quality of a restaurant is generally directly proportional to the ullage allowed by the waiter who is pouring your cabernet?
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The Apollo 13 mission went to hell in a handcart when the oxy tanks were stirred for ullage. FWIW.
The idiot also known as Capfka ...
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Any reason we can't discuss the WAD in the underused Weekly Themes forum, where it belongs?
[deceased-equine e]
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Uh-oh, 'scuse me for harrumphing at Rod--didn't realize you held the trademark, Anna! 
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bill, we really don't have to resort to rocket science to use this word (and bridget* has the right spirit). it's a very old word whose original sense is:
1. The amount of wine or other liquor by which a cask or bottle falls short of being quite full (originally the quantity required to make good the loss by leakage or absorption).
1706 Phillips (ed. Kersey), Ullage of a Cask, is what such a Vessel wants of being full. 1833 Loudon Encycl. Archit. §1324 It is usually tunned into hogsheads of a hundred gallons each, leaving a few gallons ullage. 1835 Marryat Olla Podr. III. 297 (Moonshine), I held the bottle up to the candle to ascertain the ullage. 1885 W. Ecockes in Civilian 3 Jan. 141/2 A work+comprising tables of ullages of casks, whose bung diameters range from 15 to 40 inches.
and, at the risk of angryfying the anglo-saxon police, here's some *really early usage:
1297 Chanc. Misc. (P.R.O.) Bd. 2 No. 15 (5), Tradidi etiam eidem vnam pipam pro oliagio predictorum doleorum.
when I used this as the daily wwftd, a subscriber wrote to say that this is actually used in the restaurant where he works to refer to the dregs left over in glasses and bottles!
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I should have said that its use in space technology made it much more interesting to me.
The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
cold duck (Kalte Ente)
SYLLABICATION: cold duck
NOUN : A beverage made of sparkling Burgundy and champagne.
" when I used this as the daily wwftd, a subscriber wrote to say that this is actually used in the restaurant where he works to refer to the dregs left over in glasses and bottles!"
Dear tsuwm: I think your correspondent who called beverage left overs "ullage" was simply ignorant. "Ullage" is the gas above the liquid. "Cold duck" is a fairly old name for a mixture made from leftovers of several kinds of wine, said to have orginated with European waiters and kitchen help cleaning up after banquets.
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The space usage is probably the most common - or at least the best known - usage of ullage these days. Because I have friends who run wineries or are mad-keen home wine makers, I have heard the term from time to time in its "original" usage. Actually(r) I thought that the usage by the rocket scientists was one of the better ones from the perspective of keeping the original meaning! 
The idiot also known as Capfka ...
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>: I think your correspondent who called beverage left overs "ullage" was simply ignorant.
I don't think we need to be that harsh. the OED goes on:
2. a. (See quots.)
1832 S. Roose Ullaging 5 By knowing the vacuity, and subtracting it from the whole content, leaves the Ullage or the quantity of liquor then in the cask. 1867 Smyth Sailor's Word-bk. 705 Ullage, the remainder in a cask or package which has leaked or been partially used. 1883 Encycl. Brit. XVI. 28/2 The quantity of liquor contained in a cask partially filled and the capacity of the portion which is empty are termed respectively the wet and dry ullage.
b. slang. (See quots.)
1874 Slang Dict. 332 Ullages, the wine of all sorts left in the bottoms of glasses at a public dinner. 1889 Pall Mall G. 21 Aug. 2/1 ‘Pray what is “ullage”?’ ‘The washings out of casks, sir,’ replied my friend.
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Tsuwm, I might get angrified. I doubt that I would get
angryfied. But your 'orignal sense' #1. brings up an interesting concept.
1. The amount of wine or other liquor by which a cask or bottle falls short of being quite full (originally the quantity required to make good the loss by leakage or absorption).
Now, the part in the parentheses restates the first section, in a rather significant way. Because the first section, which can stand alone, is actually a definition of
something that isn't there! It does not refer to
"the amount of space" or "the amount of gas"--it refers to something that is absent. Quite intriguing, when you think about it.
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My dictionary says ullage is the amount by which a container, esp. of liquid, falls short of being full.
So ullage is the shortage, not what is left.
As so often happens with technical terms, idiots
get them backwards, and get into print.
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My dictionary says ullage is the amount by which a container, esp. of liquid, falls short of being full.
So ullage is the shortage, not what is left.
And yet the OED offers it as valid - sorry, Bill, but you'll have a tough time winning this one.
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Dear Max: "F-word" the OED. I wish Bobyoungbalt were with us, because he is in the business of buying merchandise from overseas, apparently. He would know how to check that "ullage" is a legal term, used in contracts to guarantee that the buyer gets what he paid for. If you bought a thousand barrels of wine, with a guaranteed ullage of no more than one quart per barrel, and received a shipment of a thousand barrels with only a quart in each, I believe you would be sufficiently annoyed to sue, and I believe, readily win the suit.
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Whoa, now, boys; how 'bout a deep breath or two? I am
sticking my nose in without a paddle (gee I hope that made you smile ), because I've not come across this word before,
but going by the quotations, it looks to me like 'ullage'
can be used to mean both: the amount that is there,
AND the amount that isn't. Witness:
The quantity of liquor contained in a cask partially filled and the capacity of the portion which is empty are termed respectively the wet and dry ullage.
So, perhaps users of this word need to be specific.
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And, here, all the time I thought "dregs" was the proper word for the sediment left over in the bottom of a wine glass or the bottom of a cask or bottle. In a fancy restaurant I've heard the sediment in a glass called the "lees." And quite properly I thought!
Silly me!
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, it looks to me like 'ullage'
can be used to mean both: the amount that is there,
AND the amount that isn't. My point exactly. I was not trying to provoke Dr. Bill, I was simply unaware that he would object so vigorously to the idea that the word in question might have more than one meaning. 
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>The quantity of liquor contained in a cask partially filled and the capacity of the portion which is empty are termed respectively the wet and dry ullage. well, imagine that... a word which is its own opposite!? hey jojo!! but on a less serious note, here's what Norman Schur ("1000 Most Challenging Words") has to say: Ullage is used of a bottle of wine part of which has been lost by evaporation. In England, ullage was formerly used as a slang term for "dregs" and even more generally, "rubbish".One might, then, refer to this whole thread as ullage.
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Dear Max: I was irritated only at the stupidity of the people who inverted the meaning to no good purpose.
I guess the only solution would be when contracting to buy wine by the barrel to define "ullage" in the contract.
"One might, then, refer to this whole thread as ullage"
Tell that to Wordsmith.
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I was irritated only at the stupidity of the people who inverted the meaning to no good purpose.It's like the say, Bill, "shift happens"! 
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Good one, Max!
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tsuwm fears running the risk of angryfying the anglo-saxon police,
Or, worse yet, angrifying the Speling Patrol.
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Dr Bill comments: As so often happens with technical terms, idiots get them backwards, and get into print.
I fail to see what being a private person has to do with anything.
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Wet and dry ullage be damned. As I responded privately to a query from Dr. Bill, my office dictionary (American College Dict.) defines ullage as: "1. the loss of wine or spirit from its container, caused by leakage or evaporation. 2. the amount of goods lost by passing through the sides of a bag." End citation -- there is no other definition given. The first of these is the accepted meaning for shipping and Customs purposes. The U.S. Customs regulations, Byzantine as they may be, do not expect anyone to pay for what he is not getting. Hence, in making an entry of wines or spirits in barrels, one may claim an allowance for ullage, since the rate of duty and taxes on imported wines and spirits is considerable, and there is always some ullage in barrels due to evaporation and, if the barrel is defective or damaged, to leakage.
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this is turning into a bit of a carriwitchet, but when you think about it, defining ullage as 2. the amount of goods lost by passing through the sides of a bag. involves--granted, in absentia--the measurement of the 'lost' wine itself, as evidenced by the space created in the vessel. it's kinda a 'glass half empty' conundrum, but if you buy into that theory, it would stand to reason that the dregs at the bottom of a glass of wine as it's whisked away from the table is indeed the ullage of that which should theoretically have arrived into the vessel of one's body.
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carriwitchet is a new one on me, but certainly we are getting positively metaphysical over what is, to me at least, a simple matter of a word to express the opposite of the contents of a container; i.e., the non-contents.
That brings me to this question for everyone: I am sure I have, somewhere, seen a word which is an antonym for ullage, but I can't think of it. Can anyone? Uncommon word, like nonage, the antonym of dotage.
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well, check out this "Shipyard Dictionary" under ullage http://www.purgit.com/dictiona.htmlbut keep in mind that other sources give outage as the opposite of this.
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I am sure I have, somewhere, seen a word which is an antonym for ullage, but I can't think of it. Can anyone? Uncommon word, like nonage, the antonym of dotage.
Fullage?
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we wish. actually <ahem>, fullage once had something to do with the cost of cleaning cloth (fulling), but also is used for refuse (which might be a connection for that use of ullage!)
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I dunno. Sounds awful close to Trade Name violation. My lawyers will be talking to your lawyers, Ms AnnaStrophic, Pty.
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Fulling - for wool at any rate-- was done with a sort of clay-The clay absorbed some of the lanolin that was left in the wool-- so the dry clay was pounded into the cloth to clean it of natural oils.
You can also use dry clay to "clean" cloudy wine of sediment-- (but its not called fulling-- Its done with cheap wines that come from second pressing of the grapes, and has more "pulp".) With soup or broth-- you use broken egg shells to clear the sediments-- I don't know why it works-- but it does.
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Fulling - for wool at any rate-- was done with a sort of clay
this clay is known as Fuller's Earth. In brewing the processs of removing the particles is known as fining and you can use gelatin (usually isinglass), eggshells, or a variety of other substances.
Rod
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and presumably-- if i have a 50 gallon barrel of wine-- and have lost 1.6 quarts of wine-- do to testing, evaportion, seepage (in to the wood) and then add 4 cups--a quart by volume-- of finings.. my barrel--might look fuller-- like it was only .6 quarts under 50 gallons... but could i sell it as that? (legal- not ethical question) or would i have to account for it? and does any one know the word? (for a volume-- )
For weight, in stores-- the different departments have "sample packages" empty to establish tare on the scales..and tare is a very old word-- and the idea that a fifty pound sack of flour-- needed to be adjusted for the weight of the flour sack-- is very old.
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I think that "tare" is a very old word relating to waste or extra weight that has to be subtracted from the weight of the desired product.
The Parable of the Tares ... King James Bible Study
... roots have grown together. At the harvest the reapers will separate the tares FIRST
and burn them. Do you understand the parable of the tares? We will move ...
http://www.angelfire.com/la/israel3/chap/tares2.html [More Results From: www.angelfire.com]
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tare
In the shipping and customs world, tare is the difference between gross weight and net weight, being the weight of the packaging.
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Fullers earth
There used to be, and I believe still exists, something called "dry shampoo". When I was a lad, my grandmother, who had suffered a stroke and was paralyzed on one side, lived with us. My mother washed her hair with a dry shampoo, because we had a very small house with no luxury facilities and she got my grandmother in & out of the bathtub as seldom as possible because grandma was a bigger woman than my mother. The shampoo was a white powder which you brushed into and then out of the hair; it apparently absorbed the oils and, with it, dirt.
The method of clarifying soup is described in a classic Italian cookbook which I have at home. After making your stock (being careful not to let it boil hard, but stay always at a simmer), you strain it and skim off as much fat as possible. If you have time, you refrigerate it overnight so the fat gets hard and can be completely removed. Then you beat several eggwhites until frothy and pour them into the simmering soup, stirring once only, and turn off the fire. After 5 minutes, you very carefully ladle the soup, disturbing the eggwhites (which will have risen to the sruface) as little as possible, through a double thickness of cheesecloth. Properly done, you wind up with a broth which will have a nice color but clear enough to read the newspaper through. The eggwhites absorb any grease remaining, and trap any remaining fine sediment.
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you use broken egg shells to clear the sediments
Also works with coffee.
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Pooh-Bah
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<<being the weight of the packaging>>
Tare: The weight of noble thoughts is packaging.
Were the ullage not the absence but its place, fond hearts would be less taxing. And yet is love's disequilibrium constant.
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<<The Apollo 13 mission went to hell in a handcart>>
Centuries waited for the symmetry of this Copernican shift: if the natural world doesn't orbit around us, doubtless Hell does.
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...actually a definition of something that isn't there! ...--it refers to something that is absent. Quite intriguing, when you think about it.
I think I'll sit down and ponder this while consuming a bag full of Doughnut Holes.
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I think I'll sit down and ponder this while consuming a bag full of Doughnut Holes.
Before the whole US election debacle, I always called those little white pieces of paper created by a hole puncher the "holes". People used to give me funny looks. Well, it's not like they knew it was called a chad, either!
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