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Patches and Stickers for sale here

No. 7571 ID: 5df0bf hide watch expand quickreply [Reply]
  In this video a sacrificial furnace with a blower is constructed and iron ore(which looks like dirt) is layered with coal to produce steel. It skips refining it into iron. Awesome.

Where would you find ore, and how would you distinguish it from regular dirt? I know it's not really a relevant skill in modern survival, it's just something I want to know how to do in case I get sucked into a time vortex and wind up in the bronze age or something. Lies, it's curiosity.

When I Google this all I find are minecraft tutorials.

And if you were sent back in time, what are the options for feeding oxygen to the fire? Just blow pipes?
33 posts and 8 images omitted. Click Reply to view.
>> No. 7605 ID: b338a2
File 141115005643.jpg - (132.96KB , 1920x800 , maxresdefault.jpg )
Make an arrowhead to kill Sean Bean
>> No. 7606 ID: ddcf9f
File 141160751949.jpg - (103.20KB , 720x496 , im_puddling_lg.jpg )
You'll need a lot of the ore. Much of the ore is useless rock and possibly sulfer which makes the metal practically useless. If you have something pure like hematite of magnetite you'll still be left with a substantial amount of bloom.

Bloom is basically a bit chunk honeycombed iron and you have to work that into something manageable while it's still at welding temperature.

From some cursory reading this book might be of help to your endeavors
>> No. 7607 ID: 71848f
cheak out a book seris called foxfire its full of usefull info not shure if its still in print
>> No. 7608 ID: 9723b1
  Small furnace.
>> No. 7609 ID: 9723b1
  Even smaller.

File 144061643964.jpg - (61.49KB , 886x506 , windows 10.jpg )
7318 No. 7318 ID: 667a5a hide watch expand quickreply [Reply]
Windows 10 sends PC screenshots to Microsoft disguised as DNS requests

Video evidence below

How is this even legal?
13 posts and 4 images omitted. Click Reply to view.
>> No. 7411 ID: 269a99
You've said nothing I haven't already heard a million times from the average freetard on /g/. The chance that I'm incriminated for piracy or whatever the fuck (probably because they needed to pick someone to set an example), which is, by the way, smaller than the chance that I'd win the lottery, by my own risk/reward assessment, is not worth it.

>You do realize that the NSA literally designs and buys 0-day exploits with the help of MicroShaft, right?
If they really wanted your ass Linux will be about as much as a minor inconvenience and it would never be enough to stop them. And common sense would tell MS they shouldn't patch the vulnerabilities they're exploiting, in which case Windows Update or no it won't matter. But by all means keep using Linux if it makes you feel safe and comfortable.

>b-but it's not about the "what if"s, the minuscule probability for consequences, it's about principle!
You're entitled to your own principles and so am I. My principle is telling me not to spend time installing and figuring out and getting my workflow adapted to a new system that's either incompatible or unoptimized for most engineering software. You can make fun of me and insult me as many times as you like after this, but I'm not going to take someone who is advocating privacy while posting on a website without SSL and avatarfagging with pictures of a hypocrite who makes exceptions to his philosophy whenever he gets a picture of himself taken or have to visit the doctor seriously either.

>And yet you benefit from doing these things. All of these things increase your freedoms.
I'm tired of shitty arguments like these too.
>> No. 7414 ID: 360825
File 144338335035.jpg - (158.33KB , 1000x669 , 1403484628009.jpg )
And yet you (I assume, like a good OPERATOR), carry a gun.

>If they really wanted your ass Linux will be about as much as a minor inconvenience and it would never be enough to stop them.
Threat levels, dude. There's a difference between the dragnet and a harpoon. Using a free browser, using a free OS, and not throwing piles of information about yourself in clear text to whoever gets you out of the dragnet. If you want to prevent them from harpooning you, then you might want to follow this guide:

>And common sense would tell MS they shouldn't patch the vulnerabilities they're exploiting
Incorrect, if a bug is made public, then the public would expect it to be patched. If kept private (which is much easier done with closed source software), then they can release it to the NSA for a period of time until it is either discovered, or they feel it too harmful to remain unpatched.

There is an effective window of time in which the vuln is usable.

>in which case Windows Update or no it won't matter.
That's why it would be best to simply stop using harmful software. You argue against you precept of using Windows.
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>> No. 7418 ID: 4d1df1
>The option of using a VM, WINE, or a separate computer were all put on the table. You can also add dual booting as another.

So what you're saying, is use Windows...

since you're either
Running Windows
Emulating Windows (poorly)
Running Windows
Running Windows

in all 4 of your different scenarios, which in true reality is where things are, since nobody really devs shit for linux that is mainstream.

I get that you think you're cool and all with regards to flipflopping OS'es, but having to flip between OS'es is fucking tedious, and honestly as intelligent as having to buy a ford because you work at a ford dealership then when you go to Dodge you buy a dodge.

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>> No. 7565 ID: 9dcda2
What's the news on Win10? I'm probably going to have to install it on my new gaming machine and I'm considering letting my Win8.1 laptop "upgrade".

Note: I'm using Truecrypt and MBR partitions. (Heard VeraCrypt was the new TC.)
>> No. 7570 ID: fb3bdd
Meh, Works alright. Do not under any circumstances let it auto update. It may or may not just brick itself. Get a disk, do a fresh install.

File 143289270928.jpg - (155.20KB , 959x626 , a-10.jpg )
7168 No. 7168 ID: 3c16c6 hide watch expand quickreply [Reply]
How about we upgrade the A-10 with a railgun?
Also painted it black for that future feel.

Shooting bullets is so last year.
19 posts and 5 images omitted. Click Reply to view.
>> No. 7563 ID: 9dcda2
> You're talking about how many rounds can be fired through it without stopping, which isn't an important reliability factor for an aircraft.

I was talking about what happens when you have an ammo problem. A gas or recoil powered gun needs to be cycled by some external force. (Vid related.) An externally powered gun already does that.

> Reliability vis a vis fewer parts means that when it DOES break, there's less parts to requisition to fix it. Also it's fewer crucial components that can be damaged by enemy fire.

Aircraft are high maintenance machines and the military has plenty of spare parts. Also the gun is not a crucial component. If an engine / hydraulic pump / generator gets knocked out, the mission is over and it's time to RTB.

I'm not saying a revolver cannon is a bad idea, just that external power is the way to go.

However, gatling guns are fucking awesome, and not that much heavier than revolver cannons. The 27mm Mauser BK-27 gas powered revolver cannons weighs 220lbs, while the GAU-12 25mm rotary cannon weighs 270 lbs, with double the rate of fire.

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>> No. 7564 ID: a19011
bloody pakistani ammo...
>> No. 7567 ID: a4acc8
>needs to be cycled
Why does it need to be cycled? Is the enemy coming over the hill? It's an airplane, if ordnance malfunctions you let your wingman do the job and RTB for fixing.
If you're that worried, it's possible to use a blank cartridge system to clear it like the Russians do.

I like revolver cannon because for a given caliber it will be lighter and more accurate, while offering comparable rates of fire.

Imagine how much 35x228mm gatling cannon would weigh. 7 more barrels, plus an electric/hydraulic system, and a second electric/hydraulic system as a spare.
>> No. 7568 ID: 9dcda2
> Why does it need to be cycled?

To make your gun work again if it stops working.

> it's possible to use a blank cartridge system to clear it like the Russians do

This is true. The BK-27 page mentions that.

> comparable rates of fire

Revolvers cannons have a third the rate of fire of rotary cannons. I wouldn't call that comparable.

If you were 1/3 as tall as the tallest guy on the planet, you'd be a dwarf.
>> No. 7569 ID: bb6076
>Imagine how much 35x228mm gatling cannon would weigh. 7 more barrels, plus an electric/hydraulic system, and a second electric/hydraulic system as a spare.

You wouldn't need to have 7 barrels. 7 is just what they needed to reach the cyclic rate of 4,200 rpm and give each barrel enough time to cool on the GAU-8. If the designers wanted to go for a lower rate of fire, say 1800-2500, a 3 or 4 barrel configuration would work.

Its not impossible to make a lightweight gatling gun over 7.62x51mm caliber. The AH-1F Cobra onwards mount a three-barrel 20mm gun, the General Dynamics M197. 750 round magazine, 1500 RPM rate of fire.

You could also gas-operate the gatling gun just like a revolver canon, and only use the electric/hydralics as backup.

Or just go whole hog and push the T250 37x219 cannon into an A-5 Vigilante airframe.
first link is interesting because it directly compares the 37mm round to the Oerlikon Millennium guns 35x228. Bottom of page, green case is x228, brown is 37x219.
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File 143525713260.jpg - (31.87KB , 500x230 , lsat_a.jpg )
7213 No. 7213 ID: 8aafcd hide watch expand quickreply [Reply]
Okay, so I know how regular cased ammo works. But I never could wrap my head around how both caseless and "cased telescopic" ammo works. Both types of ammo (in the pic) have the bullet buried inside the propellant. I don't quite understand how that is supposed to work (but it does, as evidenced by the LSAT machine gun).

I can understand how regular cased ammo works because all the propellant is behind the bullet, so it makes sense to me that when the propellant is ignited the bullet is launched forward out of the gun - the opposite direction from where the propellant exploded. But with caseless and telescopic ammo, all the propellant is AROUND the bullet, yet the bullet somehow still launches forward out of the barrel.

I can't quite understand that because, in my mind, since the propellant surrounds the entire bullet instead of only being behind it, I would have thought that when the propellant is ignited all around the bullet, the bullet doesn't really go anywhere or else exits the barrel at a very low velocity. Yet they've proven that building ammo in such a way can have just as much velocity as regular cased ammo.

So can one of you who have a better grasp of physics and firearm mechanics explain how this ammo works to me? Thanks.
12 posts omitted. Click Reply to view.
>> No. 7438 ID: 06a0fb
File 144471548364.jpg - (93.10KB , 651x560 , LSAT5_56&7_62.jpg )
Also, this is a pic of the size comparison of the standard 5.56 M855 and 7.62 M80 against the LSAT caseless 5.56 and 7.62 versions.

Case capacity for powder is roughly 115% that of the traditional brass cased for 5.56, and the case weight is down to 63% fully loaded vs. M855. 7.62 has not been finalized in design and materials yet, so final differences between it and M80 aren't known.
>> No. 7522 ID: 06a0fb
bumping to the top of the board. Found this article looking for updates on the CL LSAT and Marine Corps testing, and found this article

Special mention is made under ammo developments and the apparent study of a round called .264 USA as a proposed intermediate cartridge for adoption.

I haven't heard about the round before; is anyone else up on it? They also make mention that Lake City is making conventional-layout polymer cased/brass base ammo for a 2016-2017 ammo study.

Is anyone else hearing this kind of stuff or is this all bullshit being pulled from nowhere?
>> No. 7561 ID: 589262
sweet, LSAT update.

here's info on .264 USA: http://www.thefirearmblog.com/blog/2014/11/10/usamu-264-usa/
>> No. 7562 ID: a4acc8
>is a 6.5mm caliber round, based on lengthened 7.62×39 brass
Russians are building literally the same fucking round.


Could this be the "convergent evolution" everyone is talking about?

If American gun producers start talking about a .500 cartridge for assault rifles, DMRs, sniper rifles and machine guns, I'm going to shit a brick.

>> No. 7566 ID: 06a0fb
.264 seems significantly longer than 7.62x39, .264 being .31 inches longer, and a millimeter greater width in the case shoulder on .264. Case base to shoulder is much larger in .264, 1.1606 inches in 7.62, but 1.3901 in .264.

That 6.5mm russian stuff is almost exactly 6.5 grendel, but dimensionally both are still smaller in length, and base to shoulder length. It seems .264 uses a slightly smaller base diameter than 7.62x39, .4449" vs x39's .447". probably to address the AMu's desire for less case taper than the x39 case has.

Who knows, if this is all development of an intermediate load for the LSAT, brass case dimensions won't mean much for the final product.

File 145395482376.jpg - (30.45KB , 610x382 , 635825999572224971320001808_apps.jpg )
7523 No. 7523 ID: a4acc8 hide watch expand quickreply [Reply]
So some of my apps have network leakages, all to this address:

My cell provider limits network use to a few gigs per month, so this is an issue. I just need to know if it's malicious or not.
4 posts omitted. Click Reply to view.
>> No. 7536 ID: 6d6cb1
Which version of Android and which document readers are you using? If You are on 6 or later, then you can control some access it has. Otherwise, you will need to setup a firewall.

Oh, and as a heads up, the IP address seems to be associated with Alibaba or something.

As for other applications, check this out:
>> No. 7537 ID: a4acc8
ICS, it's an old phone... The document reader was FB reader for my comics, and a few others for PDFs, ebooks, excels etc. I deleted it all so it shouldn't be a problem, and I turned off data the moment I found out obviously.
Thanks for the great link, especially the F-droid since as I didn't have google play store.
>> No. 7545 ID: bbcc9a
File 145465957946.jpg - (108.76KB , 1024x768 , cat47.jpg )

So your cell phone reporters your location every 5mins. They know where your bedroom is (you charge your phone there), they know when you shit (you take your phone there for 5-10mins).

Privacy was given away so we could watch more cat videos, think we got the better part of that deal.

>> No. 7546 ID: bbcc9a
They know where you are whiten 10ft, where you work, who you love, how you fuck.

Always interesting making a FOI freedom of information request on yourself.

>> No. 7550 ID: 6d6cb1
This. You can either completely get rid of your phone or you can put it in a Faraday cage when you aren't using it.


File 14540254271.png - (21.06KB , 1152x648 , Bannana actuator.png )
7525 No. 7525 ID: d6e847 hide watch expand quickreply [Reply]
Has anyone ever seen an Actuator like this before?
5 posts and 2 images omitted. Click Reply to view.
>> No. 7532 ID: a4acc8
File 145420606381.jpg - (11.89KB , 440x240 , flex-claw-led-grabber.jpg )
I know some people who design stuff for the medical sector. They made a flexible hydraulic actuator consisting of a silicon tube with a ball bearing at the end acting as the "piston" and the fluid being saline. The ball bearing actuates a grabber arm kind of like pic related. The actual "piston" is completely flexible, it can do an even more extreme U-turn than OP picture. It's meant to go in an artery for stent installation and other jobs.
I wish I had some pics, it's really neat. And I'm probably breaking rules by telling you guys so don't fucking spread it around or try to patent your own!
>> No. 7535 ID: ba2103
>And I'm probably breaking rules by telling you guys so don't fucking spread it around or try to patent your own!

Too late, gears in my head are already spinning on patenting the metering pump you need to drive it. :P
>> No. 7543 ID: d6e847
That's actually exactly what gave me this Idea.

Turns out, there's an easier way to do that with mechanical linkages. (plus, you wouldn't want the labia minora getting clipped between the rod and seal.)

>And I'm probably breaking rules by telling you guys so don't fucking spread it around or try to patent your own!
What are we, savages?
>> No. 7544 ID: a4acc8
>implying you have the $200 million needed to bribe FDA
>> No. 7548 ID: ba2103
>That's what you have friends for.

Alternatively, like my cancer seed source.
>Just bill it for terminal cases, do some GOOD work, then sell it to someone else to figure out with the fda.

File 145438800069.png - (53.96KB , 547x421 , need help.png )
7538 No. 7538 ID: 4b268a hide watch quickreply [Reply]
Built a new PC and everything is running fine except the USB ports on the front of the case.
I always have them trying to install when I boot and I have checked to make sure they're hooked up.
It just sits on the 'Searching preconfigured ...' and doesn't progress as all.
Any pointers or tips on how to fix this would be very appreciated.
>> No. 7539 ID: 15fc4c
You probably need to find drivers for "USB 2.0 MTT Hub" on the internet and manually install them yourself.
>> No. 7540 ID: 15fc4c
Also beware of fake drivers when downloading from unknown sources.
>> No. 7541 ID: 4d876f
Since is USB it's on the motherboard, check motherboard brand and model number and go straight to the source, if is brand name system it's easier just download the driver from their website.
>> No. 7542 ID: 5036fc
pretty much this.

I had a bank of my USB 3.0 ports that wouldnt work for some pain in the dick reason. I had to go in and manually install a separate asrock driver for them (or was it intel) to get them to work. Made no sense since I had installed every other type of chipset driver, etc.

Even more idiotic that windows will detect and install drivers for everything else but, nope, cant help you on what boils down to a generic USB hub driver.

File 136081076751.jpg - (10.33KB , 300x239 , futurama-world.jpg )
2696 No. 2696 ID: 8c1454 hide watch expand quickreply [Reply] [First 100 posts] [Last 50 posts]
As decreed by the ancient profits of Threadology - welcome to the Acid Man explosives thread!

Some of this will be interesting, some of it will be boring, and some of it will be downright dangerous. Whichever you like best, all students in the Chemistry Class are required to


Explosives. Surely if there is a contention issue concerning possession by we mere "civilians" it is this. Nevermind that most of the great chemistry breakthroughs accomplished in this art over the centuries have been made by nerdy, unlicensed, obsessive men working in their kitchens and not in the great corporate laboratories of the world. Its amazing how the people will create something, and then the government has the right to claim it as their own domain and seize it from the populace. "For their own good", of course.

But I digress. All political opinions aside, explosives are not unlawful to play with provided one abides by the requirements of the law. The first thing we are going to discuss is legality.

>The absolute purpose of this thread is to be informative and educational, for the benefit of this community. NOTHING, and I can not emphasize this enough, that is presented in this thread is intended to be applied by any person or organization, including the author, in any manner which would be inconsistent with any local, state, or federal law under any circumstances. I ask and encourage the mods to keep a close watch on this thread and remove any content that violates this disclaimer, no matter who posts it.

The first thing to know when it concerns explosives law, is that you need a license to really get into the art. A Federal Explosives License is actually very easy to get! I know some of our community are HAM radio OPERATORs, and the difficulty of the requirement is actually very comparable. Let us look at the paperwork:

>The application for an ATF Explosives License:
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>> No. 7469 ID: eb5fad
My question is how do detonators in artillery/tank and missiles actually work? I can't figure out how the shock from launching these doesn't set them off.
>> No. 7470 ID: 2f01dc
It depends on the fuse and the missile and the application. Look on dtic.mil and fuse technologies. All of them have multiple safety interlocks that can only be released via firing.

Some require rotations to unlock a balls, some require wind speed to unscrew a firing pin, some have timed interlocks (sorta kinda somewhat) and there's some designs that need the g force to activate a mercury switch to activate it so long as the projo is accellerating.
>> No. 7471 ID: 2f01dc
It depends on the fuse and the missile and the application. Look on dtic.mil and fuse technologies. All of them have multiple safety interlocks that can only be released via firing.

Some require rotations to unlock a balls, some require wind speed to unscrew a firing pin, some have timed interlocks (sorta kinda somewhat) and there's some designs that need the g force to activate a mercury switch to activate it so long as the projo is accellerating.
>> No. 7513 ID: 0dcdc8
File 145114015659.jpg - (109.60KB , 850x543 , pdj2828129.jpg )
Science....primarily mechanical engineering.
>> No. 7521 ID: d0cecd
A common WWI and early WWII one is that the firing pin is held forward near the primer by some sort of fixing agent, can't move forward or back
When the shell is fired the inertia makes the pin snap free of the fixing agent and move back into a "cocked" position
Then when the shell hits something, the inertia slams the pin forward to hit the primer

There's many different ways to do it, various locking bolts and safety lugs, germans like ball-bearing safeties for example

File 145253445979.jpg - (72.75KB , 1280x720 , maxresdefault.jpg )
7517 No. 7517 ID: 300625 hide watch quickreply [Reply]
I registered for about 20 credits of electives this quarter with the idea of dropping whichever seemed the least useful. Thing is, that seems to be the welding night class that I've taken a liking to. Its going to have the least outside homework, for sure, and its gonna be a lot easier on my health than CNC machining at 8am.

Anyway, which of these three classes should I pass up;
-CNC machining

I'm guessing welding is the least useful, since.I would always take night classes somewhere else, but Id like to hear what actual professional s have to say about it.
Pic unrelated.
>> No. 7518 ID: 6372b6
Depends what you want to do, really.

Welding is technically one of the more useful things. If you know how to weld anything to anything using anything, you have a shitton of options for when you want to cobble something together or even just straight up get a job with decent pay. If you like it, that's a bonus.
>least homework
There's a bit of shit you need to learn by heart in welding when you get in there properly, don't put off the reading material. Just me personally, I hated welding and I was also terrible at it. Can't weld to save my life after a year of college doing welding. I'd rather just machine a whole thing out of bar stock than weld two little things together.

CNC machining/manual machining is what I do for a living and in terms of "usefulness", what I learned in class was actually useful for the shit I do every day. Manual machining experience is probably the most useful to get a "feel" for shit; someone that's never seen a tool cut steel and goes straight into CNC machining often gets expensive very fast. A manual machinist that doesn't know a G-code is tends to be somewhat less useful when required to make edits to a program or even prove one out/do shit on a CNC. Keep in mind that you'll probably be working on light Bridgeport mills (low horsepower, machines that weigh maybe 2000lbs at most) while most full-on CNCs have about ten times the power and rigidity. There are plenty of super heavyweight, unstoppable strong manual machines but you probably won't be dealing with those.

Fluid power databook, and take shit slow around hot oil. 2000PSI of black gold will fuck you up and you won't even know it.
As for how useful a class in that stuff could be, I don't really know. I had a class in hydraulics, gearing, air systems, belts, and rudimentary shop electronic circuitry. Just a primer on stuff really, enough to show us what a "danger, do not touch" sign was like for each system.

Again, what do you want to be?

File 145032647313.jpg - (21.03KB , 940x528 , marty_cooper.jpg )
7476 No. 7476 ID: 8f04fe hide watch expand quickreply [Reply]
A friend recently gave me her old Galaxy S3, so I could upgrade from the 90's flip phone I've been hanging on to. It's weird, and I'm not sure how to use it when I have a perfectly good laptop that I use for everything. I do want to figure it out, and it seems like it has a lot of applications as a mobile device. That, and I'm tired of looking hipster-ish with my old ass phone.
The problem is I have somehow fucked the camera, which clearly worked before I started playing with it. I don't know what the buttons do, so I just pressed some to see what it did. What's the harm, right? Well I've screwed something up royal. Every time I try to access the camera now it goes black, then the phone restarts. Everything else seems to work ok, but this is annoying as piss.
How do un-fuck this? Will a "factory reset" fix it, or will it screw me into having to unlock the phone, which I'm sure I can pull off at some point, or what. Her son unlocked it and installed something called liquid smooth before she gave it to me. I don't know what that is, though.
There's literally nothing on the phone. No photos, no important info, no apps. Is factory reset the route to go, or do I need to look elsewhere?
7 posts omitted. Click Reply to view.
>> No. 7494 ID: 56cd4e
>The questions here is what exactly did you press
I pressed the "front camera" button that popped up on the camera itself, and I tried to use Snapchat, which uses the front facing camera, and it did the same thing (restarting my phone).

>What do you mean?
locked, unlocked, cracked, uncracked, jailbroke... I don't know what the correct term is. I may be making a mountain out of a molehill.

>Find out how to boot your device into recovery, make a backup of your phone in it current state, and proceed from there.
Will do.
>> No. 7495 ID: 4fb1cb
>locked, unlocked, cracked, uncracked, jailbroke... I don't know what the correct term is. I may be making a mountain out of a molehill.
Android isn't that different than a computer. The process of gaining root access has to do with modifying files in the /system partition (systemless root is a very recent thing so I doubt it applies to you). Factory reset only clears the /data partition. You'll still have your root access, you might just need to re-enable it in the settings app. If you want to stick with liquidsmooth just do a normal reset. But if that doesn't fix the camera crash then you'll need to try booting into recovery and installing a different ROM.

To be honest though, you don't really sound like you're using root access at all.
>> No. 7514 ID: 6d6cb1
Do it. It's not hard.

Install Cyanogenmod. Be slightly more free with your personal spy device.
>> No. 7515 ID: fc3045
I own a Samsung S4 spy device. What do you suggest do?
>> No. 7516 ID: 4fb1cb
Pretty sure official CM builds have shitty camera support. Look for something else unless you don't care about taking pretty pictures.

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