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Comment Re:I must be getting old. (Score 1) 98

Am I the only person on the planet who still opens the garage door with, you know, my hands? Is that completely crazy? Am *I* crazy?

Around my neighborhood almost no one parks in the garage (they park in their driveway, or the street). The garage is where you store stuff (and you rarely open the garage door).

I thought the garage was where people put their guest bedroom. :-)

Comment Re: He's a cosmonaut, not an astronaut, dude. (Score 1) 70

That was the only pad Russia had which has the infrastructure necessary to launch humans into space

Not entirely correct. It is the only *active* pad with that infrastructure. There are decommissioned pads that have been used for manned missions in the past. What state they are currently in is an unknown, but it has been speculated that equipment could be salvaged from them to repair the damaged pad.

Comment Re:3D printing wasn't the problem (Score 1) 92

I've done my first test of buying a whole pallet of filament straight from a Chinese manufacturer. It's a risk - it could be all junk - but if it's usable, the price advantage is insane. Like $3/kg for PETG at the factory gate (like $5/kg after sea freight and our 24% VAT). Versus local stores which sell for like $30/kg.

Comment Re:No kidding (Score 1) 92

Early on, I was overdoing chamber heating, and later discovered that was part of my problem. A blanket and a duvet can get a P1S's chamber over 70C. But if you do that, in my experience, like half an hour or so into the print you'll get heat creep problems and the filament will split & the extruder will just dance around in the air as though it were clogged (though maybe my filament was just garbage... it certainly was *wound* terribly). I ended up using a meat thermometer stuck in through one of the holes to measure temperatures, and then I'dadjust the positioning of one small blanket over the chamber to try to keep it in the mid to upper 50s, and was able to finish big prints that way.

But yeah, whatever means you use, you need some sort of raft and very strong reinforcements.

Comment Re:Who's Stupid? (Score 1) 92

As was mentioned earlier, this isn't talking about a turbine blade, it's talking about an air intake. Also, "millimeter level"? This isn't the early 2000s. I usually print with a layer thickness of 100 microns, and the printer's control of the Z axis is well finer than that.

The problem is that they made an insane choice of a material for the intake. It was supposed to be ABS-CF, but instead it was apparently PLA. Corn plastic. The stuff people make Warhammer figures and the like out of.

Comment Re:Better info (Score 1) 92

I mean, the fact that PLA's chain is vulnerable to scission by water is in a way nice - not just from a compostability perspective, but from a health perspective too. I don't mind sanding PLA, for example, because PLA microplastics aren't going to build up in your body the way that, say, PETG or ABS might. At 60C, PLA microparticles decompose fully in just 10h. It's significantly slower at lower temperatures, but still, they don't persist. Also, a lot of people like that it's made out of corn rather than petroleum (personally, I don't care).

But yeah, it's pretty insane to use a PLA part on a plane.

Comment Re:3D printing wasn't the problem (Score 1) 92

It's pretty counterintuitive for those used to working with macroscopic fibre composites. For example, glass fibre fill adds more strength than CF fibre fill (CF fibre fill adds more stiffness). Because it's not so much about the strength of the fibres themselves, but rather how well the polymer matrix grips the fibres.

Comment Re:No kidding (Score 1) 92

Jesus. PLA has *no business whatsoever* being *anywhere* on a plane. Even in the cabin. It can melt in a hot car on a sunny day. It's hard but brittle. It's not entirely water-stable. It's fine to make a *model* of a plane, but making actual plane parts out of it? That's insane.

For any non-printers in here: PLA is "corn plastic". You know those compostable grocery bags? Those are mainly PLA , plus some PBAT (another biodegradable polymer, added to make it flexible). Imagine a rigid version of those bags - that's what PLA is like. They made a part out of that and stuck it on a plane.

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