Draw an iceberg and see how it would float in water

Re:Draw an iceberg and see how it would float in water by maxrmk on Saturday February 20, 2021 @02:27AM (#26202323)

I spent... longer than I should have trying to take advantage of this bug to recreate a stable version of the stereotypical tall iceberg that the original tweet was complaining about.

https://imgur.com/a/WG6D0RJ

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Re:Draw an iceberg and see how it would float in water by rampant_ai on Saturday February 20, 2021 @05:05AM (#26203048)

I was able to make sailboats that float if I cross the line over itself so the sail is in "negative space", which keeps it upright. Kinda neat!

https://i.imgur.com/2LZn50v.png

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Re:Draw an iceberg and see how it would float in water by sgtnoodle on Saturday February 20, 2021 @06:32AM (#26203399)

It's prettier than my boat. :-)

I believe it works because the sail consists of negative mass. The overall mass of the boat is therefore lower, but the part of the hull that's under water produces the same amount of bouyancy based on the area of displaced water. Because of the width of the hull, it's a stable equallibrium.

Interestingly, if the sail were to become submerged, it would create negative bouyancy and the boat would sink!

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Re:Draw an iceberg and see how it would float in water by WJW on Saturday February 20, 2021 @09:39AM (#26204380)

I don't think there is a stable "vertical" configuration without the negative mass trick from crossing lines: https://en.wikipedia.org/wiki/Metacentric_height

Any convex shape will tend to minimize the forces due to buoyancy and "horizontal" should always go less deep (or equal for a sphere) than "vertical"

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Re:Draw an iceberg and see how it would float in water by mawise on Saturday February 20, 2021 @11:05AM (#26205118)

https://imgur.com/a/OjuWEKK

It can be in a local minima of buoyancy without being a global minima. Similar to an un-sharpened pencil balanced on it's end.

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Re:Draw an iceberg and see how it would float in water by WJW on Saturday February 20, 2021 @11:45AM (#26205503)

Cool, I stand corrected. I tried with a few triangles of my own but they never stayed upright, but maybe I just suck at drawing and they all started too far off-center to remain in the little "valley" of the stability diagram.

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Re:Draw an iceberg and see how it would float in water by sgtnoodle on Saturday February 20, 2021 @04:12AM (#26202847)

You can create pontoons by circling over the same spot repeatedly. It's like you're concentrating more mass into the same area but reducing the density!

https://ibb.co/VmXShfY

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Re:Draw an iceberg and see how it would float in water by rbobby on Saturday February 20, 2021 @03:35AM (#26202627)

From left to right draw a sawtooth shape. Make the last one very wide. Then retrace your steps completing the other half of the sawtooth.

https://imgur.com/a/Kb8Y8zv

(there are about 4 completed saw tooths above the screen)

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Re:Draw an iceberg and see how it would float in water by crazyKoala2 on Sunday February 21, 2021 @10:10AM (#26213986)

I made a vertical one just by making it very thin: https://gliggy.github.io/tallandthin.png

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