0976: "Sail"

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rhomboidal
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Re: 0976: "Sail"

Postby rhomboidal » Fri Nov 11, 2011 6:12 pm UTC

Sure, it's fun, but it would've taken Magellan's expedition forever circumnavigating the globe. And put Columbus WAY off schedule.

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bantler
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Re: 0976: "Sail"

Postby bantler » Fri Nov 11, 2011 6:24 pm UTC

I find the animated gif mildly erotic.

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Re: 0976: "Sail"

Postby Airbuilder7 » Fri Nov 11, 2011 6:27 pm UTC

bantler wrote:I find the animated gif mildly erotic.

I was about to say the same thing!

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Enkidu
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Re: 0976: "Sail"

Postby Enkidu » Fri Nov 11, 2011 8:11 pm UTC

"I applaud your choice on the lateen rig. I've sailed my dad's Sunfish for years (it's older than I am, and I'm 41 ), so my first impression was also Sunfish, but I can see the hull is not quite like one."

Clearly, this is a Snark, not a Sunfish! This one has an optional splash deck. It's also skippered by my daughter, an xkcd reader herself.

Image

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Re: 0976: "Sail"

Postby eran_rathan » Fri Nov 11, 2011 8:39 pm UTC

Enkidu wrote:"I applaud your choice on the lateen rig. I've sailed my dad's Sunfish for years (it's older than I am, and I'm 41 ), so my first impression was also Sunfish, but I can see the hull is not quite like one."

Clearly, this is a Snark, not a Sunfish! This one has an optional splash deck. It's also skippered by my daughter, an xkcd reader herself.


But is your Snark a boojum?
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Re: 0976: "Sail"

Postby chubasco » Fri Nov 11, 2011 8:55 pm UTC

Seriously? No references to:

http://en.wikipedia.org/wiki/Chaotic_Inflation_theory

You guys disappoint me ;)

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Re: 0976: "Sail"

Postby bmonk » Fri Nov 11, 2011 9:02 pm UTC

eran_rathan wrote:
Enkidu wrote:"I applaud your choice on the lateen rig. I've sailed my dad's Sunfish for years (it's older than I am, and I'm 41 ), so my first impression was also Sunfish, but I can see the hull is not quite like one."

Clearly, this is a Snark, not a Sunfish! This one has an optional splash deck. It's also skippered by my daughter, an xkcd reader herself.


But is your Snark a boojum?

Maybe. We can tell if he suddenly and silently vanishes away. . . .
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Re: 0976: "Sail"

Postby Bsmoke » Fri Nov 11, 2011 9:25 pm UTC

I would assume that instead of making the sail out of 'bubble juice', that the sail itself would merely be soaked in it. Say, a cloth sail soaked in it would have enough airflow through the sail material to blow a bubble. Of course, the sail wouldn't perform its intended purpose as well, but it would have the bubble blowing bonus.

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Re: 0976: "Sail"

Postby John W Kennedy » Fri Nov 11, 2011 9:55 pm UTC

His mother was a votaress of my order:
And, in the spiced Indian air, by night,
Full often hath she gossip'd by my side,
And sat with me on Neptune's yellow sands,
Marking the embarked traders on the flood,
When we have laugh'd to see the sails conceive
And grow big-bellied with the wanton wind....

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Re: 0976: "Sail"

Postby existentialpanda » Fri Nov 11, 2011 10:21 pm UTC

First thing I thought of was exocytosis. I've been a bio major too long.

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Re: 0976: "Sail"

Postby madaco » Fri Nov 11, 2011 11:27 pm UTC

Did the .gif remind anyone else of a glider gun from Conway's game of life?
no?
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Re: 0976: "Sail"

Postby Paulmichael » Sat Nov 12, 2011 12:04 am UTC

Looks like Boomerang guy from 445/475 is having problems sailing now!

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Re: 0976: "Sail"

Postby AvianMinded » Sat Nov 12, 2011 2:05 am UTC

I'm claiming that this is related because of all the talk of bubbles and whatnot. If that irritates you then you may want to skip this post.

When smoking shisha from a hookah you can make some very cool looking bubbles filled with smoke.

Take a plastic water bottle and cut the bottom third off and discard. Use a little sandpaper to make the edges smooth-ish. Dunk the part you just sanded into a small bowl with soapy water (I prefer to use Oil of Olay because it seems to take those bubbles longer to pop). Blow into the part of the bottle that you'd normally drink from.

Hookah/Shisha smoke works best. You can make it with other types of smoke, but you won't get a nice opaque cloud (in most cases).

You may have to try a couple of different things to get a good smoke bubble. Sometimes the bubbles don't want to let go and as soon as you stop exhaling all of the smoke will come rushing back out as the soap goes back to its normal shape. If you're having trouble with this try mixing a little more water into the soap and/or try gently shaking your head and the bottle from side to side. Once you've figured it out go confuse a cat.
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Re: 0976: "Sail"

Postby PatrickRsGhost » Sat Nov 12, 2011 2:29 am UTC

Samik wrote:
PatrickRsGhost wrote:When I was a kid, I remember a toy came out that looked very similar to the sail. It was called "Dip Stix" and the idea was it helped you make bubbles the size of minivans, or even commuter buses. I asked for one for my birthday. I ended up with a "Bubble Thing", which basically did the same thing. It. Was. The. Shit.

You made up your own bubble solution: 1 cup of dish soap to 10 cups of water, and a teaspoon of glycerin. The book recommended using the brands Joy or Dawn. I tried another brand, and sure enough, only Joy or Dawn (we usually bought the latter) worked best.

We had some variation on that. A couple of sticks with ropes between them that you dipped in a home made solution involving dish detergent.

We would take it and spin around in circles and try to create as many rings of ~2ft in diamater bubbles around ourselves as possible. I once managed to get three complete rings around myself (stacked vertically, like a spring) before it popped. I know we got a picture of it, but I haven't the slightest idea where it might have gotten off to - this is the first time I've thought about it since, probably.


I think yours was the Dip Stix. This was mine.

I used to walk with the thing open, trying to make a huge ass-bubble wall. I also tried to do the donut trick, but it never worked.

With the bottles, I used to blow bubbles within bubbles. Sometimes I'd do multiple bubbles in a bubble. If I was lucky, I would do Bubbleception: A bubble within a bubble within a bubble.
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Re: 0976: "Sail"

Postby yuyuyami » Sat Nov 12, 2011 5:27 am UTC

Is no one else seeing that as an actual cloth sail that's been dipped in soap water? Would that work?

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Re: 0976: "Sail"

Postby Uzh » Sat Nov 12, 2011 8:39 am UTC

yuyuyami wrote:Is no one else seeing that as an actual cloth sail that's been dipped in soap water? Would that work?


No. It wouldn't.

There would be a foam of small bubbles on the surface of the fabric. There would be a small film of soap over every hole in the cloth sail which resulted in a tiny bubble if wind was catched.

And it wouldn't look like the fourth panel in any way, even if the small bubbles unified to a big one.

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Re: 0976: "Sail"

Postby PatrickRsGhost » Sat Nov 12, 2011 12:23 pm UTC

Uzh wrote:
yuyuyami wrote:Is no one else seeing that as an actual cloth sail that's been dipped in soap water? Would that work?


No. It wouldn't.

There would be a foam of small bubbles on the surface of the fabric. There would be a small film of soap over every hole in the cloth sail which resulted in a tiny bubble if wind was catched.

And it wouldn't look like the fourth panel in any way, even if the small bubbles unified to a big one.

Georg


I remember as a kid, when I used to take baths, my dad showing me a game involving a dry washcloth. He would take the washcloth, place it on the surface of the water, and making sure to have a pocket of air trapped underneath, place the washcloth under the water. Squeeze the washcloth, and a bunch of small bubbles would come out.
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Re: 0976: "Sail"

Postby Tass » Mon Nov 14, 2011 1:11 pm UTC

irishnut wrote:Since I'm in no way capable of doing the math on it I wonder how much the surface tension on a bubble like that would allow you pull...
Also laughed out loud at this one, for some reason I find this absolutely hilarious lol


Waters surface tension is 72mN/m. Soap water has somewhat less, but the bubble has two sides, so lets say 2 times 50mN/m. That means if your sail has a ten meter circumference it would pull 1 Newton of force, equivalent to the weight of 100 grammes of mass. Not an efficient sail.

Notice it scales with circumference of the sail, not area. A fine mesh covered in soap film could plausibly be used as a sail.

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Re: 0976: "Sail"

Postby addams » Mon Nov 14, 2011 8:05 pm UTC

newsouthzach wrote:
YellowRex wrote:Nice rendition of one of MIT's gaff-rigged catboats.

Gaah! Just saw this. It's not gaff-rigged, and it's not a catboat. It's a lateen sail. As belliot suggested, it's a lot closer to a Sunfish than any sort of catboat rig.

As for the hydrodynamics... it's an interesting question. Obviously you wouldn't get much lift from bubble formation, but I'm not sure the lift would be zero, which means that in principle you might be able to propel a boat with a sail made from a glycerin film. Wouldn't be particularly efficient, but it might move. Assuming an appropriate Reynolds number.


Sure; It would move. Movement is not the point. Movement is an added joy to large bubble making.

Picking that thing up out of the Glycerin Soap Bubble Lagoon would be WORK.
How sticky would that thing be? Sticky and slippery. Oh Dear God. He's done it again.
What is sticky, slippery and fun?

"Hookah/Shisha smoke works best. You can make it with other types of smoke, but you won't get a nice opaque cloud (in most cases).

"You may have to try a couple of different things to get a good smoke bubble. Sometimes the bubbles don't want to let go and as soon as you stop exhaling all of the smoke will come rushing back out as the soap goes back to its normal shape. If you're having trouble with this try mixing a little more water into the soap and/or try gently shaking your head and the bottle from side to side. Once you've figured it out go confuse a cat."


Smoke bubbles are fun! I have tried all kind of smoke. Not any one kind seems much better than the others to me. But, the simple little kid bubbles are easy to carry, easy to replace and confuse more than the cat. And; It is easy to make smoke bubbles with them. On a humid day, smoke bubbles last a long time. When they pop, there is a puff of smoke. So, fun.
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Re: 0976: "Sail"

Postby Zamite » Tue Nov 15, 2011 1:28 pm UTC

At first I was like... Oh me yarm "Its gemulating! Soon we'll have baby boats"... then I read the alt text :D

And ofc bubbles aren't perfectly spherical when they are big enough... Gravity/wind and (basically most of all other non-symetrical forces that are not surface tension) make it that way.

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Better title for 0976 "Sail": "Soapy Sails"

Postby fdavis99 » Thu Nov 17, 2011 5:35 pm UTC

"Soapy Sails" would be a cool title. Only for geezers.

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Re: 0976: "Sail"

Postby PatrickRsGhost » Fri Nov 18, 2011 11:23 am UTC

addams wrote:Smoke bubbles are fun! I have tried all kind of smoke. Not any one kind seems much better than the others to me. But, the simple little kid bubbles are easy to carry, easy to replace and confuse more than the cat. And; It is easy to make smoke bubbles with them. On a humid day, smoke bubbles last a long time. When they pop, there is a puff of smoke. So, fun.


I remember as a kid I was playing on one of the swing sets at our apartment complex. I was with a few other kids, and their dad was a smoker. He would take a puff of his cigarette, hold it, then dip the wand in the bottle of bubble juice (the kind you bought at the store), and blow. It was so cool popping the smoke bubbles.

A friend of mine had once bought a bunch of firecrackers. When I was a teenager, we had a swamp in our backyard. We would take those firecrackers, light them, and aim them towards the water. If we did it right, the firecracker would go underwater, explode (you had to time it just right), and a few small, smoke-filled bubbles would surface. When they popped, wisps of smoke would come out. It was such a cool effect.

We did it on the swamp when it was frozen over in the winter. It was really weird to see those smoke bubbles float on the surface, trapped by the sheet of ice. Once they found the hole we had broken to throw the firecrackers in, they would pop, with the smoke billowing out.
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