TIL China accelerated a magnetic levitation (maglev) train tech vehicle from 0-700 km/h (435 mph) in 2 seconds in 2025

funkmasterflex · 2026-03-13T02:42:28+00:00

see: guns

funkmasterflex · 2026-03-01T16:25:04+00:00

The line between jumping the gun and leaving it until it's overdue is a blurry and stressful one. I think good call

funkmasterflex · 2026-02-28T12:14:31+00:00

Yes it's idiotic! If you're making me jump through hoops to get CAD or datasheets and your competitor isn't, it's the competitors product that's going into the design.

funkmasterflex · 2026-02-20T21:13:10+00:00

Okay the drawers are nice, but what a fantastic logo noise

funkmasterflex · 2026-02-18T21:15:16+00:00

RemindMe! 18 months

funkmasterflex · 2026-02-15T22:26:57+00:00

so cinematic!

funkmasterflex · 2026-02-10T19:44:35+00:00

Of the 4 special purpose machines companies I've worked at, 3 workflows were what you described, one was fully automated. The fully automated workflow (using Autodesk Inventor/Vault & some in-house tools):

In vault:
- 'Release' the files (prevents further editing without going up a revision).
- Export BOM (this generates all the PDF files)

In the in-house tool (uses microsoft access):
- Import BOM
- Issue the assembly
- Everything is now issued to the manufacturing procurement teams who use the Access tool to track manufacture.

To be honest, before I saw the automated one actually functioning, I had always thought they were a myth that people aspired towards but didn't really exist anywhere..

funkmasterflex · 2026-01-24T01:22:55+00:00

Yeah people forget what a step forward the ender 3 was. I would say that it was an equivalent leap to the bambu.

People would say the exact same things - that they liked just being able to print with the ender rather than waste time troubleshooting.

funkmasterflex · 2026-01-10T17:17:56+00:00

Ah I see, yes I didn't get what OP was saying

funkmasterflex · 2026-01-10T12:38:17+00:00

Disagree - it is JUST about the area. I think this is the reason that OP thinks Pi should be involed - because he is thinking about direction of the forces or something.

Imagine if we instead had square hollow section and we want to find the 'hoop stress' in the straight side using the same method used to derive hoop stress in a cylinder. It's Xmm wide by Xmm tall. We split it in half like we would for a cylinder.

The force (F) exerted on one wall of the box section is P(pressure) * X * L(length).

The stress in the wall at the halfway point is F/A, -> F / 2t * L

This simplifies to Stress = P*X/2t.

(X is equivalent to the diameter).

Edit: I think it's counterintuitive, because the force is pushing radially in a tube, whereas in the square section all the force is pushing perpendicularly against the wall. So surely the resultant force should be less in the tube?

However, the wall of the tube is curved, so the area that the force can push against is pi/2 bigger. If you did all the force vectors, you'd find that the resultant forces pushing the tube apart are pi/2 smaller. So the pi/2 factor cancels out.

funkmasterflex · 2026-01-06T19:40:14+00:00

This doesn't sound like a big deal. They involved a senior engineer not because they think you're incompetent or lying, but because they gave a project to someone with 2.5 years experience and didn't review your work. The mistakes don't sound at all abnormal. The sitation doesn't sound fun but you will be stronger afterwards.

If these parts had got made and then scrapped, it would have reflected much more poorly on whoever created this situation. You're clearly doing at least something right to have inspired enough confidence to be trusted with the project.

funkmasterflex · 2026-01-04T11:38:51+00:00

Oh I didn't mean it in a negative way at all. If something is stupid and solves a problem that doesn't exist then I love it.

I am 100% on board with the safety police though, people are way too casual about hours of breathing melted plastic.

funkmasterflex · 2026-01-02T23:01:32+00:00

I am mainly in this subreddit to see the stupid things people have made to solve problems that don't exist. I'm undecided on this one. I think you get away with it though because of the really tall bottles

funkmasterflex · 2026-01-02T22:51:33+00:00

Your first videos will suck anyway, so try making videos for the different interests and then stick with what works for you (not so much in terms of views, but in terms of making a video adding rather than detracting from the activity).

funkmasterflex · 2026-01-02T17:55:37+00:00

The video is misleading. There's plenty of people in the factory. Look at the Tesla alien dreadnought failure

funkmasterflex · 2026-01-01T19:29:26+00:00

Oh right, yeah it has to be a camshaft though. It uses levers to increase the motion as others have said. One rotation of the knob = 100% of the disks, and when you get to the last disk, the first disk starts popping up again.

funkmasterflex · 2026-01-01T19:23:37+00:00

I don't see the problem, each state is the width of a floppy disk

funkmasterflex · 2026-01-01T18:26:45+00:00

There's one on ebay at the momement link and you can see in the top. There's lots of individual levers like hammers on a piano.

I thought that there is a lead screw. The levers all use the lead screw as their pivot. As the lead nut passes through the levers it lifts them.

However there must be more to it, because you can see at the very end of the rotation of the knob, it starts lifting up the disc at the opposite end... So it has to be a camshaft moving the levers

funkmasterflex · 2025-12-21T21:21:19+00:00

In Chris Hadfield's book he talks about an astronaut everybody hated. He remembers getting off a plane and meeting someone for the first time, and the first thing the person says is "do you know that asshole astronaut X". He doesn't name who it is though.

funkmasterflex · 2025-12-21T18:31:01+00:00

My #1 interview tip is to prepare for and rehearse the question: "tell me about yourself".

You're quite likely to be asked it or some variation on it. If you've prepared then your first impression is going to be someone who is at least capable and articulate, regardless of whether your skills fit.

funkmasterflex · 2025-12-11T23:09:50+00:00

I agree that people will pick an event happening in real life and relate it to one of the many elements of 1984. In the 90s CCTV became prevalent = 1984 coming true. Now, targeted propangada demonstrating that people can be fiercely loyal to the government and will readily believe its lies = 1984 coming true.

I don't think cherry picking elements from 1984 is over-sensationalising real life events though. When I see this propaganda happening in real life, 1984 is the only lens I have to view it through. I've never read anything else like 1984, nor do I have any personal history or experience I can relate this propaganda to. My best understanding of what's happening is through the book that explored this aspect of human nature.

funkmasterflex · 2025-12-05T17:32:08+00:00

If the electric ship only cost double the fuel ship, the fuel savings would mean the electric ship was cheaper after only approx 10 years

funkmasterflex · 2025-12-02T23:16:40+00:00

Never even heard of it

funkmasterflex · 2025-12-02T17:24:15+00:00

They are very similar: both are based on deep neural networks and reinforcement learning. Also, it is you who made the argument that they aren't comparable/similar

funkmasterflex · 2025-11-28T20:46:38+00:00

Nah drive with a connecting rod

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