https://www.yahoo.com/news/future-navys-electromagnetic-railgun-could-150517763.html
>As University of North Carolina physicist Mark Gubrud told Defense One:
>The real limit is how much energy per shot you can deliver to the projectile and sabot without destroying the rails too fast. All that plasma that you see when the gun erupts, that's material from the rails and sabot being vaporized at the sliding contact, unlike a powder gun where the barrel isn't much eroded and the flame is from the propellant gases. I think this is what limits the total energy that can be delivered to the projectile in practice.
Where were you when Railgun is kill.
>All that plasma that you see when the gun erupts, that's material from the rails and sabot being vaporized at the sliding contact
stopped reading there
>>30262539
>falling for the "if there's no contact then there are no abration"-meme
you know that the hypersonic shockwave and the air-trail alone behind the round will turn steel into paper, right?
>>30262571
fascinating strawman, the article glosses over the current barrel life of existing guns and railguns
>>30262656
>I DONT WANT IT TO BE TRUE TO FUCKING CHINK REEEEEEEEE
I dont think you read the article right.
It is literally mentioned there how conventional guns have longer barrel life because their rounds arent being fired at super high hypervelocity.
>>30262466
>a single professor knows more than the thousands of PHDs that have been working on this problem for decades
>>30262693
>not reading the article
Barrel abration can be reduced by firing the rounds just half that fast.
Railgun wouldnt be able to reach 100 miles, but 50 miles though,
Not bad. But this also kills the entire point, because you can already achieve 50 miles with rocket assissted guided rounds.
>>30262716
>abration
Ablation, you ricenigger
>>30262716
>implying I didn't read the article
It's based entirely upon one person who doesn't even know anything but the basics of the program. Again, what he says has no merit and is the epitome of 'I know better than all these thousands of other people with intimate knowledge that have been working on this for decades!'
I guess writing about the F-35 got boring and they decided to move onto something else.
HAHAHAHA
CHINA WINS AGAIN
USN BTFO!!!!111
H/PJ-38 will get extended range guided rounds soon, which will be just as good as the expensive US AGS on their Zumwalts.
Noone is gunna outrange China's 052D/055s anymore.
>>30262736
No, it's actually "abrasion".
Both Abration and Ablasion are common misspellings.
https://en.wiktionary.org/wiki/abration
>>30262466
>The problem is that the only ships that will be able to generate the gargantuan 25 megawatts of power (enough to power almost 19,000 homes) required to fire the railgun are the Zumwalt-class destroyers, which will use Rolls-Royce turbine generators to produce as much as 78 megawatts of power for the ship.
>test firings scheduled to be on a DDG-51
>DDG-51s produce 75MW
>More than enough power to have all the radars on at full blast, power a railgun and a FEL if they were all discharging at once
Yellow Journalism.
>>30262789
*ablation
Shit nigger.
>>30262716
>abration
>>30262736
>Ablation, you ricenigger
lmao
i think the word OPs looking for is abrasion
>>30262828
see
>>30262789
too late, you both riceniggers.
>>30262748
>China
>winning
Isn't your culture doomed to extinction from throwing too many female babies in rivers?
>>30262688
>STOP POINTING OUT THE UNDER RESEARCHED NATURE OF THE ARTICLE REEEEEEEEEEEE!!!
Pick an existing 120-155mm gun and tell us its effective full charge count.
>>30262716
>you can already achieve 50 miles with rocket assissted guided rounds.
Tell us how much those cost per unit.
>>30262466
http://www.acq.osd.mil/chieftechnologist/publications/docs/FY2015_TestimonyONR_KlunderUSNM_20140326.pdf
They've gotten barrel life expectancy up to 400 shots and plan to get it up to 1000 shots. Not bad for naval artillery.
>>30262466
that's like saying nuclear fusion is a step backwards from fission because we haven't had an efficient prototype in this extremely new science.
Plus even if it erodes it will still be a fraction of the cost than missiles.
Plus+ yahoo is a joke that's only alive because of it's Alibaba shares.
>>30262716
But you can also use railguns as point defense. Sort of like 5" DP guns but with a 50 mile range and 25 mile AA ceiling.
>>30262983
>economy of scale.
After all, the railgun rounds also will be guided.
Not any less expensive than traditional rounds.
>>30263064
You didn't answer the question.
>>30263075
>economy of scale
If produced in small quantity: Expensive
If produced in large quantities: Inexpensive
If produced in wartime: Only material-costs and food-costs for the labour
If produced by Lockmart: Exorbitantly expensive, even during wartime and with quantity in the millions
>>30263043
Seriously why are they only focusing on huge rail guns and not focusing instead on smaller 2"-6" rail guns? It'll take less energy to achieve similar velocity and still extreme destructive power. Fuck if they make them into tungsten rounds that are 2000% as long as their diameter they can deliver insane KE with low cross section and drag and have crazy puncture power.
Hell they could make them into autocannon style arms too.
>>30262850
No anon.
We are all rice niggers.
>>30263138
According to Dr. Fisher and leaks, that's exactly what the chinks are doing.
Not huge railguns, but smaller ones firing only 1-2 pound projectiles.
Suppossedly, their Pr.303 EMG was successfully tested in 2006 or so, firing a 37mm slug with 3km/s.
>>30263176
>>30263188
>>30263064
Why would they all be guided? Regular artillery isn't guided, only specialized rounds, same for the main guns on most USN ships, they only use guided rounds for specialized purpose.
They're super accurate even without guided rounds.
The gun is positioned based on a lot of factors including GPS positioning.
>>30263176
That's the smart way to do it. Get it good with a reasonable scale then once refined go big as fuck or tiny like inside an AR.
>>30263102
lol
>>30263102
You still didn't answer the question of how much they currently cost.
>>30263102
truth.
especially last point.
for all who think that 'war mobilization' in the 21st century america would mean that we will churn out botes like in WWII; they all ignore that the kikes will still rip us off and somehow manage to keep the capitalist market economy running during war-time, so that they can still gather their shekels and win from our losses.
it will end up with kikes selling us the bullets, antibiotics, food etc. at exorbitant prices, because of the high demand.
and no amount of executive order or war-mobilization will prevent that.
>>30262571
The innermost "barrel" of the railgun is contained in a vacuum, enclosed in a supercooled shell. There are no hypersonic shockwaves where there is no air.
>>30263557
Dr. Ron Paul said something like this: "So, we're asking money to the Chinese to buy European weapons to arm moderates to fight in Middle East? Really?"
>>30263138
Actually, that was the lower powered one.
In 2008 they tested a 10 mj railgun with a muzzle velocity of 2520 m/s
http://www.navy.mil/submit/display.asp?story_id=34718
Plug the numbers into wolfram alpha tells us that the max theoretical height of that shot (minus air resistance) is about 324 km or about 200 miles and change.
Ofcourse, at those speeds air resistance practically cuts the performance in half but for a 8 year old prototype with a third of the power of the planned weapon it's still pretty impressive.
>>30263217
>They're super accurate even without guided rounds.
>citation needed
>>30263176
>>30263231
That might just accelerate barrel degration, though. More shots for equivalent performance means the barrels will get worn out faster.
>>30262466
>hack writer looking for a hot take and a no name professor as a source
wew
>>30262688
notice the slip up as the OP admits to being 50 cent when no one had made the accusation
>>30262748
China still playing catch up?
>>30268491
China still playing catch up.
>>30263635
I'd like to see a source on that.
>>30263635
How the fuck does the things reseal after its fired
At least China and US is in the right direction.
Russia is stuck with their Electro chem something tests and radar fuse for their new guns and JDAM kit for their old guns. LEL No space age Railguns for vatniks.
>>30270829
Electrochem isn't a bad technology, it's more practical on tanks thou, and other smaller platforms that don't have enough power generation to go full railgun.
The US was planning an electrochem 120 a while back (2008 ish) for the GCV program, no idea what became of it.
>>30270945
Their new gameplay is modularity. If it fits in a tank chassis it can fit in a boat. The Koalitsiya turret is supposed to be fitted on their new Leader class destroyer, same 152mm diameter or probably bigger but with almost the same tech.
>>30263635
All in the face of the blatant evidence in the picture huh
>>30263162
then who was potato nigger???
>>30268491
>catch up
China already has ERGMs deployed for the PLZ-05s since at least a decade, while the PJ-38 was purpose made for ERGM in mind.
So, the West is rather catching up here in terms of deployment of ERGMs for naval use.
>>30271433
Considering that there were guided LRRAP designed and test fired in the 80s for shit like 16" guns. Not really.
>>30262466
Home
>>30271787
>tested is the same as fielded
China has gunpowder when Americans were fucking buffaloes.
>>30271928
>China in charge of weapons technology
They used the gunpowder for fireworks.
>>30262466
>UNC prof
stopped reading there
>>30271928
Stop, you're embarassing yourself.
>>30270781
>>30270983
It's a single shot test platform, it doesn't reseal.
>>30262789
Abrasion is due to friction, ablation is due to heat. As this is thermal heating due to the shockwaves, it is ablation.
>>30271433
>Krasnopol clone
>ERGM
>>30271928
Opium war.
We should just engineer around the rail erosion problem, until we fix the rail erosion problem.
Just make it so a ship at sea and at war, can easily and quickly replace the rails.
>>30262656
>>30262688
>>30262693
>>30262716
>>30262983
>>30263064
>>30263506
>>30270765
Confirmed for never taking a physics class.
"I'd like to see a source on that" etc.
Why do you internet "experts" even bother commenting on things you don't understand? You know reading wikipedia doesnt change the fact you work at McDonalds/Walmart and are the intellectual equivalent of a turd. Sorry you couldn't handle college courses but stop trying so hard and suck a mossberg.
Just stop.
>>30272499
You're trying way too hard
>>30263138
Why not just use a Gauss rifle at that point?
>>30272499
Asking for a source is actually a well honored practice in the scientific community. It's why peer review exists, after all.
>>30270970
Germans tried putting the PZH2000 turret on their new destroyers, in the end they got italian guns.
I doubt that will be as easy as the russians think it is.
>>30263138
Because our naval thinking is comparing them to AShMs. and a 32 MJ railgun is what you need to get comparable range to a Tomahawk cruise missile.
