As someone who tests materials and parts like this for a living, I can look at that part and say with 100% certainty that it will last for a period of time.
Price gouging
Submitted 1 day ago by GreenDust@lemmings.world to [deleted]
https://lemmings.world/pictrs/image/fb6e3d06-2f64-41fa-9c1b-ec9c7696847e.jpeg
Comments
gigastasio@sh.itjust.works 1 day ago
funkajunk@lemmy.world 1 day ago
Nanoseconds are technically a period of time, yes.
Neondragon25@piefed.social 1 day ago
I think we can get a bigger number if we just measure in femtoseconds. And bigger number is better.
kungfuratte@feddit.org 21 hours ago
“I didn’t even have to make the CAD file myself. Just prompted GPT to generate it for me.”
prole@lemmy.blahaj.zone 1 day ago
Helicopters freak me the fuck out.
At least planes can glide if the engines die.
TheDoozer@lemmy.world 23 hours ago
I have flown in helicopters most of my career, and we regularly did auto-rotation emergency drills, where we cut the engines output back (to simulate dual engine failure) and then “glide” to a particular spot, using the air pressure from descent to drive the blades.
With a good pilot, you just kind of go zero-g for a second or two, and the. A somehwat faster than normal descent, followed by a big flare (tail down, nose up, like a diving bird pulling back and fanning its wings out) at around 80 feet, then quick (less comfortable) drop to the deck.
With a good pilot, it’s mildly uncomfortable, with a mediocre pilot, it’s some back pain and some extra maintenance inspections, but you aren’t crashing.
EightBitBlood@lemmy.world 17 hours ago
100% well said. However, imo the biggest problem is doing this when failure actually happens over any terrain that isn’t flat for several hundred yards.
Engine failure while flying through mountains doesn’t provide enough room to descend and pull back up.
So recovering from critical failure is very dependant on the enviroment the pilot is flying in. Just wanted to add that on, as Helos are imo, basically designed to enter and exit the worst environments out there, making it difficult to counter mechanical issues even with proper training.
Nalivai@lemmy.world 1 day ago
Not really, the autorotation makes the blades behave like a plane, so you can also glide. You need blades to be heavily damaged for it to fall down like a stone, same with planes when the wings fall off.
prole@lemmy.blahaj.zone 1 day ago
I’ve never once seen a helicopter crash that looked anything at all like it was falling with a parachute.
mwproductions@lemmy.world 1 day ago
Also, a plane gliding to a landing still needs a pretty large, clear area to touchdown and come to a stop safely. Helicopters landing using autorotation need far less space.
phoenixz@lemmy.ca 23 hours ago
Not entirely,auto rotation and so,but yeah,helicopters are just machines working really hard not to explode at random
PhoenixDog@lemmy.world 1 day ago
What’s the term I heard about helicopters? Something along the lines of:
A helicopter is 1000 moving parts all conspiring to kill you? Something like that.
ccunix@lemmy.world 1 day ago
I like James May’s description
A plane elegantly uses the laws of physics to fly. A helicopter just beats them into submission.
Or something like that.
A_Chilean_Cyborg@feddit.cl 18 hours ago
I think there was a time a dude did this for real on a Cessna and crashed it as the part almost immediatly failed.
Unless you have a metal 3D print, or can print in exotic ultra strength materials, you just can’t do this.
thespcicifcocean@lemmy.world 17 hours ago
I think even if you have a metal 3d printer, it would still not be suitable for anything where strength of the piece is critical. Iirc, metal 3d printing basically just joins metal filings together using some kind of medium, making is no much weaker than a forged or machined piece.
Pissman2020@lemmy.world 12 hours ago
They use a laser to melt the top layer of a bed of metal powder, lower the bed, spread more powder, repeat. It results in a generally more porus part than cast or forged material, thus weaker, but can make otherwise impossible to manufacture geometries that can be lighter weight, which can reduce the strength requirements as well. A jesus nut is not an application you skimp on strength lol
stormeuh@lemmy.world 16 hours ago
F1 teams 3D print (laser metal sintering more specifically) their pistons these days, so I’d say at the bleeding edge of the tech you can create pretty strong parts. But indeed, anything which a consumer is likely going to be able to afford won’t be nearly as strong.
b_tr3e@feddit.org 16 hours ago
The reasonable way would be to do the prototype with a 3D printer, create a mold and cast the metal. This wouldn’t work here either, but if you already have the CAD/CAM file you could just get it milled by a professional CNC outfit. If you’re not too cheap with the steel, it might not even kill you and still cost less than $1600. OTOH, if you can afford a helicopter that shouldn’t be an argument for you. Half an hour in the air will cost you more than that.
CookieOfFortune@lemmy.world 16 hours ago
IIRC: It was a 3D printed intake using those carbon fiber filaments that aren’t really carbon fiber. However the main failure was the assumption that the intake wouldn’t get hot, but it did.
Forester@pawb.social 1 day ago
As a sacrificial cast right?
Kintarian@lemmy.world 22 hours ago
You now have the world’s first single use helicopter
Zorcron@piefed.zip 1 day ago
BanMe@lemmy.world 1 day ago
It’s almost like it’s a joke
Zorcron@piefed.zip 1 day ago
Yes, but this has been posted a couple times before, and people always act like it’s real. Instead of responding to any of the folks here, I figured I’d just make my own comment.
billbasher@lemmy.world 17 hours ago
It might not be a joke. There are metal materials and a specialized printer that you need like 370C for. My Ender can only run up to like 260C
chiliedogg@lemmy.world 16 hours ago
It’s a joke.
But also, there are other, better forms of metal printing. One is to use metal powder and laser-weld it layer by layer.
Zorcron@piefed.zip 14 hours ago
The image is a poorly executed FDM 3D print stylized version of the image Wikipedia image I posted, and metal 3D printing costs much more than the few cents quoted in the tweet.
Even if you were to 3D print the nut in metal, it wouldn’t be as strong as the machined original due to porosity and such, and being as that is the nut that holds the helicopter rotors to the helicopter, making it weaker would be very ill advised.
Corkyskog@sh.itjust.works 1 day ago
I assumed the one on the right was greased and ready to use.
Formfiller@lemmy.world 1 day ago
obbeel@mander.xyz 16 hours ago
Thank you for this.
jia_tan@lemmy.blahaj.zone 1 day ago
That is the most awful 3d print I have seen in my entire life. And I have seen benchys printed my cheap prusa clones.
jia_tan@lemmy.blahaj.zone 1 day ago
How did they even manage to finish the print with that ass filament and bipolar ahh nozzle temperature
BakedCatboy@lemmy.ml 1 day ago
I think it might actually be photoshopped to look like a print, because that’s the same picture that’s on the Wikipedia page for Jesus Nut, with the same hand, background, and shadows, except on Wikipedia it’s obviously a metal part.
asbestos@lemmy.world 1 day ago
saved this comment so I can laugh again when I remeber to check saved
GreenKnight23@lemmy.world 1 day ago
is uh…cum not supposed to be chunky?
Etterra@discuss.online 1 day ago
At least if that was PLA (and not a Photoshop job) there’s be no risk of it failing mid-flight. Because it would rip to shreds the second torque was applied to it.
Mac@mander.xyz 1 day ago
Ig we just calling any rust at all “rusted out” now. Cool
explodicle@sh.itjust.works 1 day ago
Yeah that nut on the left is clearly still good.
JoShmoe@ani.social 1 day ago
Oooo does it make one of those cool noises that squishy toys make?
GreenDust@lemmings.world 1 day ago
It makes those terrifying noises that dying helicopter passengers make.
pipe01@programming.dev 1 day ago
It’ll work for the rest of your life!
AllNewTypeFace@leminal.space 1 day ago
Only if you’re otherwise unlucky, as you’re not leaving the ground