retarded questiong here, do machine guns overheat like in video

>>31446483
Overheating will cause malfunctions

>>31446483
no, the bullet passing through the barrel with generally draw enough air to keep it cool.

>>31446575
If that were true AGs wouldn't carry spare barrels dude.

>>31446483
Depends on a lot of factors dude, barrel thickness, type of round, rate of fire.

The number one thing you have to consider is that most military rounds used for heavy machineguns were designed to be fired pretty much all day at a certain rate of fire.

What really kills a machinegun after a long period of fire is bore and barrel erosion but as I said most military cartridges were designed with that in mind.

Compare the shape of 308 with 6.5 creedmore for example, if you notice one has a lot more powder and has to go through a very small opening compared to the other one. That alone increases the pressure a lot and also there's the fact a lot of the powder burn time will be at the entrance of the barrel.

That's why you can shoot 308 all day on a heavy barrel but you can't 6.5 without killing the gun.

TLDR
No they don't overheat like in vidyia and shit like a SAW can fire pretty much all day because it was designed with that in mind (RoF / cartridge / barrel thickness).

>>31446599
Also before you guys tell me I know the M249 uses 5.56 the 308 and 6.5 were examples for OP to google the pictures and compare the rounds, preferably if he can also google bore erosion.

Machine guns keep firing even if you get them that hot, they just get less and less safe, but it take alot longer to overheat at full trigger down just spraying than most video games.

>>31446483

The short answer is yes.

>>31446483
Yes and no. It is possible, but generally speaking machine gunners are trained to avoid it by not firing cyclic. But if you want to, you can get a machine gun barrel red hot.

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Well, a minigun won't. Especially not after 30 seconds of sustained fire like in most vidya. The entire reason for multiple spinning barrels was to maintain a very high sustained rate of fire.

In WW1 this problem was addressed with water cooled machine guns, which had a large sleeve of water around the barrel to keep it cool. This would constantly boil into steam and evaporate out into a collection container, where it would be pumped back in.

With most modern MMGs you can get the barrel red hot like that, however you can continue to fire it. The accuracy will be severely reduced and the barrel will be ruined though. That's why most machine guns have quick change barrels.

With modern chrome lined barrels that have reasonably thick walls, you have to dump upwards of a thousand rounds in succession to get one to glow like that, though. Depending on the fire rate that's roughly two minutes of not letting go of the trigger, and the fact that you would have to link together 5 or 10 belts to pull it off.

The only guns that have a real safety problem with this are closed bolt machine guns without quick change barrels like the 1919 and the M2. The chamber stays really hot after firing and can cook off the next round unintentionally.

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>>31446575
>Retards will believe this.

Yes they overheat, no it's not like vidya.

Switch out barrels every couple minutes, precisely when depending on the rate of fire. If your barrel is glowing red, you've long since moved past the "fucked up" stage into full retard.

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>>31446575

I hate this fag but... here's your answer


https://www.youtube.com/watch?v=d84r8gMGxFQ

>>31446483
Yes, see:
https://www.youtube.com/watch?v=EwSJiAwoMpY

>>31446575
Oh how I hope you don't actually think this

>>31446483
Not they don't. The way many weapons overheat in video game is purely done for balance. So long as nothing breaks the gun will continue to fire, no matter the temperature. But sometimes irl the heat can cause parts to break or weaken, there for causing a malfunction.

>>31446483
with a water jacket and a slow rate of fire they can fire indefinitely

>>31446483
Isn't the minigun designed not to overheat?

>>31446483

Yes, guns overheat. Things get hot, parts deform. AK wooden handguards smoke and catch fire. A closed bolt gun will get hot enough to cook off rounds in the chamber just from the heat, making it unsafe. Also you ruin barrels.

An open bolt gun usually cools better and has less problems with cook off.

They don't overheat like in some games though.

Here's an M60 firing a single 800 round belt till it goes click.

https://youtu.be/mBNGgu0qGlQ

>>31446483

They won't glow red hot, at that point they'd be likely to bulge and burst and any gunner who lets them get that hot is either dumb or is being overrun.

>>31450095
>watches videos
>flashbacks to m60 range
DS would put 2x4 on your helmet and smack it with another 2x4 so he wasn't technically hitting you.

>>31450095

Night version. https://youtu.be/dGAwrmOapb4

>>31446575
not if you use hot ammo though

>>31446599
You are leaving out a pretty important factor. The only guns that do not overheat with sustained fire were water-cooled machine guns as were common in WW1.

A modern machine gun like the minimi, mag, pkm etc WILL overheat, but are generally issued with two barrels. After 200 or so rounds you are supposed to remove the current barrel and replace it with the spare, allowing the first to cool until it's time to switch back. In this manner a modern machine gun can fire more or less continuously, but there is another step (alongside reloading) which prevents it being truly continuous.

>>31446885
A minigun will overheat, the multiple barrels just allow it to fire for long enough to be meaningful. Think, 6 times as many rounds passing through six times as many barrels, and you wiull still get overheating. If the ROF was as low as a standard MG, then miniguns would not overheat (It annoys me when vidya present miniguns with something like 1000rpm)

>>31446885
M2 is closed bolt?

color me surprised....

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>>31450708
Yep.

Pictured: What held the sniper distance record for 35 years before modern specialized bolt-actions got it.

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>>31446575

>>31450891

Pretty cool that this was the main impetus for the heavier caliber anti-materiel rifles of today.

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>>31450960
Nope.

>>31450987

Well, yes, but wasn't Hathcock's usages of the M2 a big factor in the development of weapon systems like the Barrett .50?

>>31450996
Again not really.
Big bore rifle research puttered along since WW2. Hathcock used the M2 simply because there was no interest aside from the ordnance researchers so regular soldiers had no acces to them.
Only after 50 rifles started becoming accurate and man portable did they even think about issuing.

>>31451026

Ah fair enough.

I knew that large caliber rifles dropped out of focus after WWII, since tank armor became a lot tougher, so they didn't have as much utility.

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Apart from the physical erosion of the barrel, does water cooling essentially allow a gun to fire at any rate it wants indefinitely so long as you continue to supply fresh water?

For example, a water cooled MG42 at 2000rpm connected to a small creek? Could you theoretically fire a belt long enough to sustain a full hour of fire and never worry about the barrel melting?

>>31446483
In Korea, Chink troops overran American positions because gun barrels were too hot to fire after mowing down literally hundreds, and the endless waves overwhelmed them.

That pink glow is caused by digital cameras' sensitivity to near IR. Something that's almost but not quite visibly red hot will look that color in a digital photo. It's much more evident in older cameras and cheap cameras with shitty IR cut filters.

>>31450644
>It annoys me when vidya present miniguns with something like 1000rpm
You're right, it's actually 2,000–6,000 rpm

>>31451076
Barrel erosion is a problem. But look up the tests done after ww1 on continuously firing water cooled mgs. I can give you exact numbers off the top of my heaf but it's rather impressive

>>31452883
Can't*
Head*

Yes. It's not like in a video game where you fire a hundred rounds before the machine gun simply stops working and needs to cool down for five seconds before it can be used again, but machine guns overheat. It's why they have quick exchange barrels. If you fire something like 2-300 rounds through a barrel in quick succession, you increase the risk of malfunction as the metal in the barrel expands and any cartridge left in the chamber by such a malfunction runs the risk of cooking off. It also affects accuracy and makes the air above the barrel shimmer like on a hot summer day, making it hard to see your target. It is advisable to exchange the barrel at this point. If you keep firing a few hundred rounds more, you may cause permanent damage to the rifling as the steel becomes malleable and if you get it hot enough, the barrel may even become skewed.

>>31446483
Yes, but in controlled bursts they take longer.

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>>31452883
one vickers went through a million rounds in a week i think

>>31446483
I didn't read the thread. I started to, but it was retarded.

I was a m249 SAW gunner. Yes barrels can overheat. That's why those weapons have a barrel release so it can be changed. Not a SAW gunner worth his salt that's never burned their hand changing one.

I've also shot an m16 until it's barrel glowed red hot.

>>31453831
IIRC,
When they got decommissioned from the British army in the 60s, one army base got one and all of their .303 belts and just ran the thing straight till it went through all of its ammo.

Might have been a week or so, might be the same story.

Someone correct me if I'm wrong but an 80 year old machinegun running non stop for a week seems metal as fuck.

>>31453897
>In 1963 in Yorkshire, a class of British Army armorers put one Vickers gun through probably the most strenuous test ever given to an individual gun. The base had a stockpile of approximately 5 million rounds of Mk VII ammunition which was no longer approved for military use. They took a newly rebuilt Vickers gun, and proceeded to fire the entire stock of ammo through it over the course of seven days. They worked in pairs, switching off at 30 minute intervals, with a third man shoveling away spent brass. The gun was fired in 250-round solid bursts, and the worn out barrels were changed every hour and a half. At the end of the five million rounds, the gun was taken back into the shop for inspection. It was found to be within service spec in every dimension

holy fuck

>>31450987
...the other anon was right. The major reason we have the Barret .50 is because a civilian wanted a gun that could fire .50 bmg(which is fucking everywhere and cheap) without retooling an old ww1 anti-tank weapon to fit the round which was expensive as shit. the Barret was later adapted to be used for the various things it's used for(Anti materiel shit that is, blowing up ordinance and the like.)

>>31453897
>>31453911
>>31453831
Maxim style MG's are mechanically perfect, they're simply heavy as fuck.

>>31446483
>do the laws of thermodynamics apply to guns
Yes.

>>31453911
Well to be fair if they changed out the barrel every hour and a half it's much less impressive. Still pretty fucking amazing that it was robust enough to handle that amount of wear over such a long time, however.

>>31451082

MacArthur was right and Truman should have given him the go on a few nukes. It was a wasted opportunity.

Literally the Chinese-Korean border should glow at night to this day and the idea of a "North Korea" should be a dim memory.

>>31453911
>>31453942

It's settled,

We're going to take this guns to space when we become a galactic empire.

>>31453964
so, Vickers as our MG. Nugget as rifle i suppose. What about vehicles though?

>>31453972
you mean Maxim 1910 so it can nugget food

>>31453946
Well barrels are essentially expendable parts of the gun, and designed to be that way.. You still get wear on the other parts, which is what they're testing/showing off. The point here is that except for known expendable parts, the guns are insanely durable.

>>31453972

Toyota hilux

>>31446483

If you ever manage to get the barrel red hot, it's beyond fucked.
Also with a closed bolt gun you'll get cookoffs long before that can even happen.

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>>31446575

>>31450960
Lol no, WW1/2 Anti-Tank Rifles were behind that until armor got too thick.

https://www.youtube.com/watch?v=m7EfR4K17G8 [Embed]
https://www.youtube.com/watch?v=KJjx2-XmwW0 [Embed]
https://www.youtube.com/watch?v=sIU1eJk-P5A [Embed]
https://www.youtube.com/watch?v=ZheQexrFX8E [Embed]

>>31451076
It won't cool quite that fast. There still needs to be a small amount of time for the heat to travel from the bore to the outside of the barrel to the water, else the bore might get too hot and lose temper.

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>>31446575

>>31454459
>Hilux with a water-cooled maxim on top along with some $3000 optic
Let's lmao the ayys

>>31446483
I've lit a cigarette off of a M240 barrel.

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>>31461998
>lighting a smoke off your raifu's hot barrel after she smoked some desert dindus
That's hot.

>>31446588
Yeah, what happens when the barrell gets too cold? It could crack and shatter.
So you keep a warm one nearby.

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>>31446575

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>>31446575

This retard tries to cook bacon on an AK barrel
https://www.youtube.com/watch?v=PastmpZnShQ

Eric sets the handguard on fire
https://www.youtube.com/watch?v=EwSJiAwoMpY

>>31464159
>tried to
The strips directly on the barrel look cooked. I wouldn't eat it though, there would definitely be lead particles all over it

>>31446575
I heard the whoosh of a bullet is actually the cold air coming in to cool off the hot air of the bullet.

>>31446575
This but you have to use bluetip bullets

Redtips will have more stopping power but the gun overheats much faster

>>31449952
>a water jacket
>kilos added to weapon weight
>so twentieth-century
gtfo steampunk

>>31464393
>I heard from my boyfriend
stfu wepvirgin

>>31463726
>teh barrell gets too cold,
>could crakk and shatter
fgt pls

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>>31450146

Haven't never dealt with a DS they are my favorite people. I'm sure if I had actually dealt with one I would not be so jovial but goddamn I love those clever fuckers

>>31464524
I speak English but I have no idea what those letters are supposed to mean. You even misquoted me and added homophobia. I'm not gay or judgmental of gay people. I'm also not offended, I just think less of you because you're simple minded enough to be homophobic.

>>31464546
is that you nick
this is deadpoo

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>>31446483
https://youtu.be/d84r8gMGxFQ

>>31452786
some games had it even lower like in RE5 it hwas firing at 600 rpm with an actual bullet projectile imitating a tracer which implied to it actually firing really fast...sucks to be honest...

>>31464521
For HMG it is fine but any MMG and LMG it is terrible, and yes as they said with that it can fire for good long time

>>31452786
battle field is the only series to get the sound right aswell

>>31453897

The Canadian Army did this when we got rid of our .303 British Bren guns. The military figured it was cheaper to shoot the ammo rather than disposing of it. A guy I know was one of the guys that got to do this and they shot from sunset to sundown for two days to get rid of the ammo at their base.

>>31465082

Yeah, but it hit like a bb gun, lots of bb's will kill you, but realistically only one bullet should do you in.

>>31453946
They changed the barrel out that frequently because they were literally shooting so much ammunition that the barrels were going through their service life in less than two hours

Barrels are typically treated as expendable parts of machineguns and are expected to be replaced periodically

Assuming the gun they were using was roughly in the middle of the range of the vickers rate of fire, they were firing a complete 250 round belt in around 47 seconds, roughly averaging the time to load a new belt and refill the water jacket every few belts out to 20 seconds per 250 rounds they were firing roughly twenty thousand rounds every 90 minutes

>>31446575
Just keep it in the fridge, you idiot

Kinda related, looking for a video this thread reminded me of- there was a vid on YouTube years ago of a guy with a 10 inch barrel AR, SCAR suppressor and a CMAG drum

Emd result of letting it go cyclic - unburnt powder built up in the suppressor and then the action, and shit started catching fire

If anyone knows of this, or even better has a link to where it's gone, much appreciated

>>31446483
Absolutely, in fact video games often underplay it quite a bit.

https://www.youtube.com/watch?v=EwSJiAwoMpY

>>31450146
>fire 7 round burst
>heavy hand comes down on my helmet
>smell DFAC coffee breath 1" from my left cheek
>short bursts you DUMB MOTHERFUCKER!!!
>only had 10 rounds to shoot, so impossible to fuck up now...

>>31446575
Son of a bitch.

>>31446483
The gun will overheat, but certainly not a minigun. The reasons have been stated already. But as for other guns such as the SAW and 249 will definitely do it. If it has a single barrel it will period. Overheating will typically damage the weapon but not in immediate jamming. Likely the reason you stop firing in vidya is due to the game forcing your character to be trained to not trash every weapin he touches. Overheating will often cause the weapon to fire uncontrollably. Then rifling becomes warped and damaged by the heat and bullets shaving it off due to its softened state. Internal parts will expand and warp as well which will jam or break a weapon entirely.

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>>31464770

>power armor will never become a thing
>giant hulking minigun-armed shock troops with gigantic ammo backpacks will never help reconquer the Tharsis region of Mars from the Chinese