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What are the relative cross sections of the "one plug" and "two plug" designs ? |
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We ask merely for information ... |
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I'm not sure if this is sublime brilliance or mind-numbingly stupid.
Well played, sir. |
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How can there be any doubts? |
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Exists [link], but probably not widely known. |
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Of course, one plug, the size of the bottom of the tub, would drain quickest (assuming suitable drain plumbing.) |
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//Of course, one plug, the size of the bottom of the tub, would drain quickest...//...But then you really would have to be careful of not throwing out the baby with the bathwater! |
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A bigger drain plug is not a very nice solution, because if it gets accidentally dislodged, then tons of valuable hot water escapes before you can put it back, whereas the risk of both plugs coming out at the same time is a far more remote possibility. |
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The illustration in the link is not really the same thing, as two plugs on two chains. |
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I like traditional bath tubs. That thing looks like an item of surgical apparatus |
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I already have trouble finding one plug. |
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A plug fitted with a concentric plug, and showers. |
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//Surely what you need is a bigger or second hole//... in the head in your case! The idea IS for two holes each of which has its own plug. I give up.... gets out key hole cutter to modify own bath. |
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Each one seeking happiness |
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Plugged by two hopeful bathers |
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Which one will the bathtub bless? |
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Perhaps it could be a his and hers bathtub... the guy could get out and empty his half while the girl remains behind and soaks a little longer. Bun for planting the twist of physics in my head. [+] |
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Would it also have 2 spigots? Each with 2 handles? In order to fill twice as quickly? |
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I think you are onto something, but it's not clear just what. |
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"I can see the one salvation of the poor old human race (In the Bath)^2" [Flanders & Swann] |
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What's wrong with one big plug? [-] |
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I already explained that..... read the annotations. |
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In the colonies language works differently to here.... of course I could have meant two electrical plugs, which would empty the bath even quicker :-) |
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A couple of objections.
Firstly, the position of the plugholes would greatly affect the assertion about draining twice as quickly. For instance, the presence of the overflow drain doesn't cause the bath to drain twice as quickly.
Secondly, does a second plug double the likelihood of accidental dislodgement, with the greater consequent risk of losing precious hot water?
Thirdly, how would the capacity of the drainage pipes affect the whole scenario?
Fourthly (I think that this is more than a 'couple' of objections now, isn't it!), would a second plughole necessarily entail a proportionate increase in the number of spiders that invade your bathroom?
Fifthly, assuming that your second plughole is in the bottom of the bath, wouldn't this reduce the number of comfortable spots that you could sit in?
Sixthly...err, no. I think that's it actually. So, in conclusion, I think that a lot more study, very expensive research and plenty of hot baths are required before this idea should be implemented. |
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If two plugs are better than one, then a thousand
plugs would be even better, with the entire surface
of the bath being made of plugs. |
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I agree. Baths could be made like giant colanders. Then you could drain your veg in them too! |
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It depends on what the limiting element - the bottleneck if you will - in emptying the bath - is it plug, or drain. |
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If the drainpipe is 5cm in diameter, it will have a maximum capacity of flow. A single plug may already load this pipe to its limit, in which case having a secondary plug wont help, as the limiting element is the drain. |
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In this case, increasing the pipe diameter, or having an independent drain from the secondary plug will indeed increase the flow. Whether these additional plumbing requirements are necessary of course depends on the answer to the earlier question. |
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[edit] just realised [DrBob] has crossposted similar reposts while I was typing mine - Damn you Boooob! |
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Later thought: Increasing the water pressure in the bath might improve drainage - either by making the bath tall and thin, or by adoption of a mechanical piston - this might be foot-shaped and slightly oversized so as to make a snug fit around the bath. |
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Extending the two plugs concept through two sets of taps, we arrive at the logical conclusion: |
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Then, if two plugs are better than one, it follows that three plugs are better still (can you see where this is going yet?) |
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So, if we have an infinite number of baths and an infinite number of positive numbered bathers arrive, we're fixed. If an infinite number of negative numbered bathers arrive, we can ask all the positive numbered bathers to use only even numbered baths and the negative numbered bathers can use odd numbered baths. |
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This has become Hilberts bathroom, hasn't it. |
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I've noticed it's not really the plug, but the condition of the pipe that the water drains out of...like if it's clogged- it wouldn't go faster. Maybe having 2 drain pipes might do it. |
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//Damn you Boooob!//
<Terry Thomas> "Oh, hard cheese old boy! </TT>
[Twirls moustache in fiendish manner] |
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If you follow this to its logic... er, probably better to say, if you follow this to *a* logical conclusion, You could end up with a double-skinned bath, the inner skin of which is holed like a colander and mounted on a hoist... then, for fastest possible escape from the bathwater, simply activate the hoist on the colander and be lifted out of the bath. |
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Question: Why do we want the bathwater to drain faster again? |
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If there was a pressure-tight lid that came down and sealed around the rim of the bath, then the airspace could be pressurised, forcing the water out at a much higher rate than gravity alone. |
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I'm going with the electrical interpretation. One plug at each end, delivering 30 amps. |
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connect moom's hoist to a very powerful motor with
a sudden stop and a wireguide and you have a
bathtub catapult! |
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Of course, since water behaves like a wave, having two drains would create an interference pattern in the plumbing, and you could never be sure of whether that last drop chose hole A or hole B. |
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[moomintroll], that's a fascinating question. Personally I always try to get the bath to drain as quickly as possible, and frequently watch it until it does. I don't know why. I have always secretly wished for the vortex to start as early as possible. |
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So you should have hole C midway between them. |
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"midway" or "equidistant" ? |
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Once you intorduce a third point, the options increase; An equilateral triangle, an isosceles triangle, or a purely linear arrangement, complicated by the fact that most baths are not planar, but anamorphic curves. |
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make 5 holes of different size. Make the pipe
material very thin, such that the draining water can
vibrate them. The bather can then cover different
holes to make a tune as it drains. A kind of reverse
pipe organ. |
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See how much fun you can have with two plugs in your bath..... only on the fabulous halfbakery. |
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A faster drain prevents mildew from forming, allows
other
bathers faster access and also is a sight to behold.
These
factors, along with the fact that a faster drain may be
intuitively construed as a power source, probably led
the
caveman to select members of his society who were
keen
on the importance of faster draining, and in psych evo
terms that's why we still feel the urge for a faster drain
in
modern times, eventhough we have the means to
accomodate for slow drains today. In effect, [xenxag] is
quite casually exhibiting his most primal instincts with
this post, and if you were to present such a draining
system to him he may perform yelps and chest-beating
similar to the communicative prelingual behavior of our
distant relatives. |
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daseva will you marry me? |
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Anyway, baths are disgusting ... marinating in a rancid, lukewarm puddle of diluted organic excreta and assorted surfactants ... showers are much more hygenic, and what's more, the whole floor area of the shower tray can be a grille, allowing "instant" draining. |
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There's nothing like "marinating in a rancid, lukewarm puddle of diluted organic excreta and assorted surfactants" AND you can play with Airfix model battleships in a bath. I still have a midget submarine with two frogmen. I suppose one could devise a range of "shower toys", but they wouldn't quite be as much fun somehow. Jungle themed shower cubicles anyone? |
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// you can play with Airfix model battleships in a bath // |
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Only if you incorporate a plasticine ballast at build time, otherwise they have a distressing tendency to turn turtle; and the difficulty of producing a truly watertight seal along the keel is a challenge in itself. What's more, if it's desired to retain the capability for the turrets to rotate on their pintles, the hull becomes distressingly susceptible to taking on water when a "near miss" from an enemy shell sprays water over the decks and superstructure.# |
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Not that we know anything about this, you understand - all based on theoretical analysis. |
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The entire bath could be mounted with two trunnions, one at each end. A big brass lever could disengage a catch, allowing the bath to rotate rapidly through 180 degrees. |
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Or, the bath could be a clamshell design, with a long rubber seal along the centreline. |
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Two plugs are sitting in a tub.
One plug turns to the other and says, "Are you hairy?"
The second one says no...I'm Duwane. |
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If the tub were located directly above the equator would water in one drain circle left and the other right? |
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// two pintles, one at each end // |
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Er, no it couldn't. It would have to have a single pintle in the centre. |
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Edited to say Trunnions, which is what I meant to say all along. Though since a rudder hands from two pintles, I don't see that one is the maximum possible. |
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It all comes down to Reynold's numbers, viscosity, pipe
dimensions, gravitational constants, density....in fact, it all
comes down to a lot of things. |
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//If the tub were located directly above the equator would
water in one drain circle left and the other right?// |
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Nope. The Coriolis effect, as applied to bathtubs, is an
amazingly large bollock. What is amazing is that everybody
believes that water spirals one way in any given hemisphere,
despite the fact that just looking at a few bathtubs and sinks
would reveal that there is no significant bias. |
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Don't lemmings leap up cliffs in the Southern Hemisphere, and fling themselves off them in the Northern Hemisphere? |
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If you argue about rotating whirlpools, and someone shoots you, would that person be Don Coriolis? |
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You're incorrect [MB]; I've never seen it spiral any other way than downwards. |
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Provided there be a third pin for the ground. |
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Just what I need, another big, gloppy, disgusting,
waxy, soapy, stinky, hairblob, clogging drain number
2. Just what I need. + |
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I think you are wrong, max re: all the variables. That is,
most
bath fluids behave the same way. Also,
it's common
knowledge that the rotation of bathwater is
independent
of the hemispherical orientation. |
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When i look at a vortex, it always seems to be spiralling in both directions at the same time. |
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Why not just have a trapdoor as the bottom of the bath? Then you'd have almost instant draining and you could stick a heat pump under it. |
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No bathtub coriolis effect?
I feel so cheated. |
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//What’s a “near miss” anyway?// Obviously, the opposite of a "distant lad". |
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To return to the two plug 'oles thought. |
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I always loved the effects of partially lodging a heel
against the plug 'ole and occasionally effecting
strange contra-bass vibrations against the
porcelain as the soapy residues gurgle down. |
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What joy now for an amateur hydro-pedal-organist
to be able to use both feet to play some manic
symphony .... (until one runs out of water...) |
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Hmmm.. Brraarppmmm.. Hmmaarrrppmm.. |
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Hey, I checked out your profile...and guess what,
[phlog], I was in Palo Alto today, at a swimming pool.
I live in San Mateo. Go figure. What a small world. |
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I can get off topic for a second because I already
commented on the idea, right? I SAID RIGHT??? |
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Ho, blissful lady, small world indeed. But to quote
Steven Wright, "I wouldn't want to have to paint it." |
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I know your swimming pool, I think. Possibly the only
upstairs one (with parking below) that I've
encountered. What if THAT had two plug holes,
then? Perhaps they should connect them to the
parking lot sprinkler system, and get everyone's car
washed. What a deal. |
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And you Mr. Tindale may have 2 cups of coffee,
because you are you, RIGHT? |
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Great job staying on topic, [phlog]! |
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Hey, if you can get a proposal for marriage, I can
stray a little, right? |
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I don't know if Voice is serious, I'm not a great
candidate for marriage anyways.. also, If I had the
ability to grant you straying rights, I would do it bliss. |
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I think Straying is a very interesting topic, anyways,
since it is at once
inevitable and apparently destructive to the halfbaking
process, but it still confers abundant benefits
when a heaping of good straying turns into a new idea,
for example.
So, I guess straying is good, no? And straying by talking
about straying must be even better sooo, wow! That's
freakin' amazing! |
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The size of the drain pipe is what determines
the flow rate from the hole assuming the hole's
bigger than the pipe diameter. |
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Add another pipe draining to an un-
restricted
flow path with your second hole and you'd double
the flow, but two drain holes to one pipe wouldn't
do much. |
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What's the hurry though? Relax, you just took a
bath,
you should be feeling mellow. |
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// innovations in sport // |
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//History has shown that surgeons practicing trepanning on
rocks led to the sport we now call bowling// I never *used* to
agree with Henry Ford about history being bunk, but I guess I
do, now. It should be
obvious that trepanning led to the sport we now call ice
fishing. |
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Three plugs in the bathtub |
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Each one wishing happiness |
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Just one wish will be granted |
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Which one will the bathtub bless? |
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[bungston], it's deja vu all over again. |
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Two drains, one connected to the sewer, the other leading to the garden, I would find useful. |
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//Baths could be made like giant colanders.// Sounds
dangerous. You could strain yourself. I suggest a bath that
drains by tipping up like a dump truck. |
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Why not go the whole way and convert a dump truck into a bathing facility ? The hoppers are watertight, and adequately spacious. |
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/You could strain yourself./ |
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On a closer read I see that my concept of witticism has not much changed over 18 months. Reassuring! |
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