|
The Door Frame posted:I never even bothered to look his idea up because it was so ridiculous sounding, but it worked as full scale power plant? That's incredible! Visiting in google maps is awesome too. https://www.google.com/maps/@37.5384662,-90.8241103,1015a,35y,97.07h,11.05t/data=!3m1!1e3?hl=en The scar where the first attempt dumped its load is amazing, it stripped everything down to the bedrock and it's still completely clean 10+ years later. Some geologist got a giant boner from that.
|
#
?
Jun 22, 2018 22:31
|
|
|
|
| # ? Apr 29, 2024 17:14 |
|
|
The Door Frame posted:I never even bothered to look his idea up because it was so ridiculous sounding, but it worked as full scale power plant? That's incredible! TVA has been operating the Raccoon Mountain Pumped Storage Plant since 1978. It's not even a new idea.
|
|
#
?
Jun 22, 2018 22:33
|
|
|
builds character posted:wait, wait wait... Cojawfee posted:The train car would take off. Thank you. I was worried no one would get the reference. xzzy posted:Visiting in google maps is awesome too. Dang, that is impressive.
|
|
#
?
Jun 22, 2018 23:15
|
|
|
The Door Frame posted:I never even bothered to look his idea up because it was so ridiculous sounding, but it worked as full scale power plant? That's incredible! My favorite version of this is the UK TV Pickup. It's interesting. EDIT: Apparently this is not as much of a problem thanks to Netflix and iPlayer
|
|
#
?
Jun 22, 2018 23:28
|
|
|
Deteriorata posted:TVA has been operating the Raccoon Mountain Pumped Storage Plant since 1978. It's not even a new idea. i first interpreted this as a pumped-storage plant using a mountain of raccoons as the working fluid and i am choosing to believe in that reality.
|
|
#
?
Jun 23, 2018 03:39
|
|
|
They're trying to build one in tasmania. Lots of wind and water there, so use wind powered turbines when the weather is good to fill a dam. Run the hydro when the wind dies. There's losses of course, but they say the thing will pay for itself after building a new undersea cable to victoria and then selling power when there's high demand/price over there.
|
|
#
?
Jun 23, 2018 04:30
|
|
|
There are a few interesting energy storage ideas and some of them have been put into practice. There's running compressors to fill underground caverns with pressurized air that you can let back out and get energy back. There are also flywheels that can store a lot of energy for quite a while. Ultimately it will come down to better and cheaper battery systems. Renewables are great but the generation peaks don't coincide with the demand peaks and neither can be moved. TotalLossBrain fucked around with this message at 05:23 on Jun 23, 2018 |
|
#
?
Jun 23, 2018 05:19
|
|
|
Enourmo posted:Of note, all those mining vehicles use external power to run. What's the largest fully self-contained vehicle, you ask? I think the crawler was lighter than the mining machines empty, but the thing on top of it was six and a half million pounds fully fueled, IIRC. To Wikipedia! Wiki posted:Mass 6,540,000 lb (2,970,000 kg) 53 tons to the fuckin' MOON, 155 tons to just falling at Earth and missing. On topic: Look up Apollo 1  and 13.
|
|
#
?
Jun 23, 2018 09:04
|
|
Bad Angus! Bad!
|
Chillbro Baggins posted:I think the crawler was lighter than the mining machines empty, but the thing on top of it was six and a half million pounds fully fueled, IIRC. Yeah it's lighter, but it's powered by onboard engines unlike the others, which are run off grid power.
|
|
#
?
Jun 23, 2018 12:47
|
|
|
And Saturn V wasn't fueled until it was at the pad.
|
|
#
?
Jun 23, 2018 15:30
|
|
|
 From my buddy who runs the internal parts counter at a Mopar shop: was a Dodge 6.4L Hemi. They got a new longblock but the shipper dropped it unloading it from the truck, so now one of the Chillbro Baggins fucked around with this message at 18:44 on Jun 23, 2018 |
|
#
?
Jun 23, 2018 18:33
|
|
|
Enourmo posted:Yeah it's lighter, but it's powered by onboard engines unlike the others, which are run off grid power. It was based on the design of the underframe of one of the large stripping shovels, (possibly The Captain) but with Alco locomotive diesels for power. All the largest stripping shovels, draglines and bucket wheels run off grid power because their consumption is just so massive and they don't move long distances most of the time. Disgruntled Bovine fucked around with this message at 19:22 on Jun 23, 2018 |
|
#
?
Jun 23, 2018 19:20
|
|
|
that looks like pot metal
|
|
#
?
Jun 24, 2018 18:00
|
|
|
shy boy from chess club posted:Is this what it looked like? I haven't used it for anything yet but now I want to find things to apply it to. Similar, but ditch the shovel-like end & make the other pointy end beefier e: actually pretty close, just no shovel end and maybe longer: 
Nuevo fucked around with this message at 18:59 on Jun 24, 2018 |
|
#
?
Jun 24, 2018 18:33
|
|
|
Nuevo posted:Similar, but ditch the shovel-like end & make the other pointy end beefier Oh, like a spud bar.
|
|
#
?
Jun 24, 2018 22:06
|
|
|
round these parts we use tools like that to break up ice in the back lane come spring time
|
|
#
?
Jun 25, 2018 00:34
|
|
|
Nuevo posted:Similar, but ditch the shovel-like end & make the other pointy end beefier I have one of those, it's a little thicker, the flattened edge isn't as wide, and it's a hex bar instead of being round. I honestly thought it was just called a crowbar  At any rate, it's the best loving thing for digging holes. It just fucks up everything in its path.
|
|
#
?
Jun 25, 2018 02:38
|
|
|
Some folks call it a kaiser blade mmmhmm
|
|
#
?
Jun 25, 2018 03:36
|
|
|
xzzy posted:Lego makes one that might actually be the right scale for fence posts. I'm... I'm buying that. I'm buying that right now.
|
|
#
?
Jun 25, 2018 03:56
|
|
|
Data Graham posted:Some folks call it a kaiser blade I'm... thinkin I may take some o these taters home with me.
|
|
#
?
Jun 25, 2018 06:49
|
|
|
Sagebrush posted:it's also totally plausible to make a literal Sisyphus Battery, with an electric motor on top of a mountain hauling a train car full of rocks up to the top, then letting it slide back down to recover the energy when needed I recall some time semi-recently reading about a mine up at the top of a mountain somewhere getting a new electric dump truck that they used to haul loads down the hill which ended up generating enough extra electricity through regenerative braking going down the hill loaded compared to what it took to go back up empty that it was worth developing a system to offload the extra power rather than just doing a big resistor bank like a train.
|
|
#
?
Jun 25, 2018 15:49
|
|
|
a mysterious cloak posted:I'm... I'm buying that. I'm buying that right now. It would go so well with my Unimog. gently caress.
|
|
#
?
Jun 25, 2018 16:46
|
|
|
wolrah posted:I recall some time semi-recently reading about a mine up at the top of a mountain somewhere getting a new electric dump truck that they used to haul loads down the hill which ended up generating enough extra electricity through regenerative braking going down the hill loaded compared to what it took to go back up empty that it was worth developing a system to offload the extra power rather than just doing a big resistor bank like a train. Yep, and electric locomotives have been doing the same thing by feeding power back into the catenary for over 100 years. There are actually quite a few mines that use catenary electric powered mining dumptrucks, much like a trolley bus.
|
|
#
?
Jun 25, 2018 16:55
|
|
|
There's at least one company trying to make train-based energy storage commercially viable - IIRC the plan is to use smaller powered carts to haul large heavy containers between a high and a low railyard. Seems viable enough to me, though I haven't done the math. https://www.aresnorthamerica.com/
|
|
#
?
Jun 26, 2018 15:47
|
|
|
Disgruntled Bovine posted:There are actually quite a few mines that use catenary electric powered mining dumptrucks, much like a trolley bus.
|
|
#
?
Jun 26, 2018 18:58
|
|
|
slidebite posted:So it's a catenary in a coal mine? 
|
|
#
?
Jun 26, 2018 20:01
|
|
|
Geoj posted:Fun fact: its bucket is now a tourist attraction in rural central Ohio. You just blew my mind! I see that sign every time I drive up from NC, and always just assumed it was some hillbilly town with a dumb name.
|
|
#
?
Jun 27, 2018 20:55
|
|
|
 quote:If you like fracture mechanics and failure analysis this is a good one.
|
|
#
?
Jun 30, 2018 06:38
|
|
|
Letmebefrank posted:
I stayed at a capsule hotel in singapore that used a couple of those , setup exactly the same as cooling. It was pretty swampy.
|
|
#
?
Jun 30, 2018 09:51
|
|
|
They should bandsaw that end section off and hang it up in an art gallery. Give it some pretentious name, like "An Expensive Sonance".
|
|
#
?
Jun 30, 2018 16:22
|
|
|
Crosspost from my attex thread, but this happened AT IDLE. Pretty good failure for a single cylinder engine. It's hard to do much more than seize them up or lose all compression.
|
|
#
?
Jun 30, 2018 17:11
|
|
|
So like..... What the poo poo is that from?
|
|
#
?
Jun 30, 2018 18:57
|
|
|
wesleywillis posted:So like..... What the poo poo is that from? quote:That is a tension reel for a cold rolling mill. The “splines” are grooves to house and retain the expand/collapse mechanism with a rod down the middle that actuates the expand/collapse wedges.
|
|
#
?
Jun 30, 2018 18:59
|
|
|
That must have sounded amazing.
|
|
#
?
Jul 1, 2018 02:14
|
|
|
Am I correct in assuming the sandy textured section indicates a metallurgical problem?
|
|
#
?
Jul 2, 2018 05:11
|
|
|
If I remember right, typically when you're looking at a fracture like that, areas which look darker and rougher are where a crack was propagating slowly over weeks/months/years, giving the surfaces time to discolor and rust. The clean, brighter fracture surfaces are where the remainder of the material suddenly gave up once there wasn't enough web thickness left to survive the load on the shaft. So, the rough material isn't necessarily the flaw, you have to figure out where the crack started propagating from to find that. (I am by no means any kind of metallurgist or materials scientist, so take all of the above for what it's worth.)
|
|
#
?
Jul 2, 2018 11:22
|
|
|
stupid dupe post
|
|
#
?
Jul 2, 2018 11:24
|
|
|
That's the best textbook example of fatigue failure I've ever seen. The beach marks are almost perfectly defined and lead you right to the original crack.
|
|
#
?
Jul 2, 2018 13:40
|
|
|
Surprised we haven't seen more failures with vacation time this week. Evidently a few people cut corners on Friday to get out early
|
|
#
?
Jul 2, 2018 18:15
|
|
|
|
| # ? Apr 29, 2024 17:14 |
|
|
|
|
#
?
Jul 4, 2018 03:39
|
|
