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[Iron Man]

For me to answer you'll answer what this equation means since I can't make heads or tails of the figures you gave.

If you are talking about the amount of energy delivered by the projectile you need to calculate the amount the projectile was traveling multiplying by mass for both cases.
If you want to compare the amount of energy that was used to make it traverse then it's better compare the amount of energy that propelled the projectile in which case for the artillery shell the amount of explosives was used and it's efficiency .

Obviously he is referring the equation for kinetic energy (KE=0.5*mv^2). And I can't believe you have just messed up something as basic as KE and momentum (p=mv). Momentum is NOT "energy" and is not measured in units of energy.

 

[Jura The idiot]

Obviously ...

please don't shoo away my dear SamuraiBlue, he's about to rough up a warship with this:

 

[SamuraiBlue]

please don't shoo away my dear SamuraiBlue, he's about to rough up a warship with this:

Ooh brother see you have no imagination or idea of what happens when a projectile percies a closed room at hyper sonic speeds.
The surface doesn't just open a hole, it evaporates creating a shock wave that will spread within a confined space. It's basically the same as igniting a vapor bomb within a confined space.
In the video you'll find metal sheets being blasted through, if there were walls surrounding those layers you'll see a sudden burst of combustion within those wall that will annihilate anything within those walls.

 

[Jura The idiot]

would this:

Ooh brother see you have no imagination or idea of what happens when a projectile percies a closed room at hyper sonic speeds.
The surface doesn't just open a hole, it evaporates creating a shock wave that will spread within a confined space. It's basically the same as igniting a vapor bomb within a confined space.
In the video you'll find metal sheets being blasted through, if there were walls surrounding those layers you'll see a sudden burst of combustion within those wall that will annihilate anything within those walls.

perhaps contain an answer to what I asked Today at 11:52 AM
which was

...

I'm curious also about 'type of the damage' (the context is of course the question from Today at 7:41 AM)

for example would the hit from your previous answer perhaps cause the superstructure to collapse, or ... ? (I don't know, I'm asking)

?

I mean would the 'type of the damage', in the above context, be incendiary? (again, I'm just asking something I don't know)

 

[SamuraiBlue]

what extent AND type of the damage do you expect to be inflicted upon a modern (=unarmored) warship by a single hit off a 32 OR 64 MJ railgun (presumably shooting around-5"-caliber metal rods)?

I now checked the kinetic energy of a hit by Mk 7 16" at its max. range had been

0.5*1225*514^2 (don't nitpick if I didn't read out at navweaps.com the striking speed correctly, if it's incorrectly quoted there, or anything)

which is about 162 MJ; I don't try to mix apples with oranges: the main point of hitting by a 16" shell of course wasn't its kinetic energy, but the main point was to deliver several tens of pounds of an explosive under the deck of an enemy ship, and blow up said explosive there (actually if the fuze wasn't set off, the damage made by a large-caliber shells wasn't much worse than just holes in the bottom, as it had been happening in the action of the Yamato against the Gambier Bay, an unarmored escort carrier)

Here is your answer towards the amount of energy utilized from a MK 45 / Mod. 4 ship gun

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On page 4 it states the muzzle energy is 18 MJ nearly half of that of a rail gun.

 

[Jura The idiot]

Here is your answer

not to the question I asked LOL

towards the amount of energy utilized from a MK 45 / Mod. 4 ship gun

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On page 4 it states the muzzle energy is 18 MJ nearly half of that of a rail gun.

anyway looking into your document:

"Thermal Mgmt: Air Cooling
•
ERM Projectile/Propelling Charge
(under development)
•
Muzzle Energy: 18 MJ"

now let me see ...

"ERGM - 110 lbs. (50 kg)" according to navweaps.com
"ERGM with EX-167 cartridge - 2,750 fps (838 mps)" according to navweaps.com
so
0.5*50*838^2 = 17556100
yeah 18 MJ

LOL! but in my post Saturday at 7:17 PM
which you quoted to me right above!
I pointed to the fact that ginormous battleships' shells, with energies in two-hundred MJ range, had had a difficulty to sink an unarmored warship IF the fuzes of these shells didn't set off

but I still hope I'll learn something here, so I now rephrase

the question to be easy to handle:

what extent AND type of the damage do you expect to be inflicted upon a modern (=unarmored) warship by a single hit off a 32 OR 64 MJ railgun (presumably shooting around-5"-caliber metal rods)?

:
why should Opfor surface combatants fear these:

and what is the USN going to achieve using these against Opfor surface combatants?

 

[SamuraiBlue]

ERGM??

You're comparing rail guns with a project that was cancelled 7 years ago?
Basically that was a rocket propelled shell and the weight would have been half at point of impact since it would have used up it's rocket fuel within by then.
It seems it also had various problem during testing which would be labelled as a DUD.

 

[Jura The idiot]

SamuraiBlue, I'm sorry to tell you your reaction:

ERGM??

You're comparing rail guns with a project that was cancelled 7 years ago?
Basically that was a rocket propelled shell and the weight would have been half at point of impact since it would have used up it's rocket fuel within by then.
It seems it also had various problem during testing which would be labelled as a DUD.

is either foolish or trollish, because it was you who brought up that shell Yesterday at 5:07 PM

Here is your answer towards the amount of energy utilized from a MK 45 / Mod. 4 ship gun

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On page 4 it states the muzzle energy is 18 MJ nearly half of that of a rail gun.

here's page 4 of your document:

where I now added, in the red ellipse, the part which lead me to say Yesterday at 7:26 PM

...


anyway looking into your document:

"Thermal Mgmt: Air Cooling
•
ERM Projectile/Propelling Charge
(under development)
•
Muzzle Energy: 18 MJ"

now let me see ...

"ERGM - 110 lbs. (50 kg)" according to navweaps.com
"ERGM with EX-167 cartridge - 2,750 fps (838 mps)" according to navweaps.com
so
0.5*50*838^2 = 17556100
yeah 18 MJ

...

so, after Yesterday at 5:07 PM you're AT BEST chasing your tail with Today at 10:46 AM

it's my lunch break now so right now I won't spend any more time on your foolishness or trolling; be sure to seek moderation if aggrieved by what I just said
(I believe I've presented a cogent argumentation in this series, for the World to see)

***
I repeat my question,
originally formulated:

what extent AND type of the damage do you expect to be inflicted upon a modern (=unarmored) warship by a single hit off a 32 OR 64 MJ railgun (presumably shooting around-5"-caliber metal rods)?

then rephrased:
why should Opfor surface combatants fear these:

and what is the USN going to achieve using these against Opfor surface combatants?[/QUOTE]

 

[SamuraiBlue]

Oooh brother, you do understand that whether it be ERGM or a conventional artillery shell shot from the Mk 45 Mod 4 5inch ship gun is the same at 18MJ which is just over half of rail gun with a power outage of 32MJ shooting that projectile you continually post.
Now which is more powerful creating more damage 18MJ or 32MJ?
Stop evading fact and do the math.

I'll make it more simple, a

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is equivalent to 4.184MJ so 18MJ is around 4.3Kg of TNT compared to 7.6Kg of TNT exerted at impact by the projectile launched by a railgun which will cause more damage 4.3Kg of TNT or 7.6Kg?

 

[Iron Man]

Oooh brother, you do understand that whether it be ERGM or a conventional artillery shell shot from the Mk 45 Mod 4 5inch ship gun is the same at 18MJ which is just over half of rail gun with a power outage of 32MJ shooting that projectile you continually post.
Now which is more powerful creating more damage 18MJ or 32MJ?
Stop evading fact and do the math.

I'll make it more simple, a

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is equivalent to 4.184MJ so 18MJ is around 4.3Kg of TNT compared to 7.6Kg of TNT exerted at impact by the projectile launched by a railgun which will cause more damage 4.3Kg of TNT or 7.6Kg?

Someone who doesn't know the difference between momentum and energy shouldn't sound so haughty about telling people to "do the math" ROFLMAO