iancmceachern

I used to work for a guy who said at that company we made stuff that "looked like the soviets designed it in the 70s"

They do this. This is the coolest one IMO:

https://mantle3d.com/

I bought my son a bigger 3D printer and told him to stop playing with that boy.

This is the way

This is a common problem I see. Trying to solve these problems in a vacuum. He makes a joke about that in the video.

This talk will help put it in perspective: https://californiaconsultants.org/event/energy-and-thermal-m...

In order to talk about these things we need to think about the power from the grid, all the way to the cooling water coming out. Not just talk about how we can calculate or optimize each little piece. Of course we can do that, it's the overall system we are talking about and need to understand.

Forest for the trees.

What do I mean by that here?

He does the calculations for 20 kW. Which sounds like a lot. It's only enough to cool one node, not one rack, one node, in a modern data center. The starlink satellite he referenced is viewed as the absolute most modern thermal design in a satellite.

Most data centers have 2000-5000 nodes and the hyperscalers have 100,000 or more.

So to replace a single data center we need 2000-5000 of these things up there, at a minimum, or one thing that is 2000-5000 times bigger.

And maintenance.

And the hardware gets obsoleted every few years.

Or you could just put it in the desert in Nevada. But we don't need rockets to get there.

I am a mechanical engineer, I have a multi decade career doing exactly these kinds of thermal analysis.

This video is basically saying that cooking data centers in space is possible. It is.

The question is if it's better, in any way, to putting them on earth. It isn't.

The common misconception I see is that people think that space is cold like Antarctica is cold. It isn't. Antarctica is cold because there is lots of matter, very cold. Space is cold because there is no matter. No matter to put the heat into and take it away.

It's the same reason that a hard boiled egg takes minutes to cook in water, but 30 to cook in the oven. Now put it in a vacuum insulated thermos and see how long it takes to cook.

Radiation is the weakest of the three heat transfer modes. So much so that in engineering school we often cross it off as negligible compared to the other two (convection and conduction).

Do the heat transfer math yourself, let us know what you find.

One of the comments on the YouTube video you linked says it best. " The only reason to do this is if you have a company who's business is to get things into space".

Which make no physics sense

And leadership that respects and "gets" it's customer base. Customers that feel respected and who genuinely feel like the company they are supporting is in their corner are the most rabidly loyal. If you build a customer base like that, and keep respecting them, the problem solves itself.

And I'm still watching it!

I love these videos so much. I'm a mechanical engineer who designs these kinds of things all day, and these have been a great inspiration for me for many years.

Soon we won't have the capabilities. See the nuclear industry and how we don't have the people and training to do the work anymore.

But our bridges and infrastructure are crumbling

I used to think this too. Now I know different.

It reminds me of this Steve Jobs Clip:

https://youtu.be/0lvMgMrNDlg?si=QkkOnngYTjaSPlIy

He said, so many years ago, that there will become a time where computing power is so prevalent that we will stop using the person to make the computers job easier and start using the computer to make the humans job of interfacing with it easier.

But in this context, it would mean the other side of increase productivity is decreased time to do the same work. These are the same thing.

For private jets, in order of most to least deliveries per year (number per year in parenthesis): Cessna (171) Gulfstream (158) Bombardier (157) Embraer (155) Cirrus (106) Dassult (37) Honda (12)

Which is nothing compared to: 737 (447) 767 (30) 777 (35) 787 (88)

There are really only 2 choices.

There is a third, Embrarer. They have most of the market in small regional jets in some cases, but those are in reality very different than say a 777 or 787.

These two choices are conglomerates of what used to be a much larger set of manufacturers. In short Boeing, Airbus and it's suppliers are basically what is left of all the old big aerospace manufacturers.

There was a waymo just parked for days I noticed recently in SF. 2 or 3 days it was just in the same parking spot (4 hr max) with it's lidar spinning.

Hands down one of the best TV shows ever made

This is amazing. If you've ever held a fountain pen with this finish you know.

And the salmon

That's how we used to do it back on the day

Yes! The most amazing part about those things was they achieved all those axis' of motion with one or two motors.

Totally, my first revision control system was unwittingly developed by me as a kid to keep progressive backups of my simcity cities.

Some folks have actively fought against the "Manhattan-ification" of SF for many years. So much so they have a name for them "NIMBY" standing for not in my backyard. Now there are YIMBY folks too. It's a whole thing.

Came here to say the same

"While associated with Tesla, Idra has supplied these machines to other automakers, including Hyundai, Ford, and Volvo."

I asked gemini

The only thing that is dismaying you about this war is the fact that it caused people to push for more renewables?

The osprey has both engines tied together for this exact reason. One engine can turn both props. It's part of the complexity of the thing. It's just too complex.

Prison

Most people who own guns here view them as tools, not weapons. Tools to get food with, tools to defend their flock with, tools. Taking then away would be like taking away a shovel.

Thank you, it's not on audible, where did you buy it?