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> Navy: Accelerate your Railgun, RL- not as stylish as on the Lobo
fistandantilus4....
post Feb 1 2008, 02:05 PM
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http://www.foxnews.com/story/0,2933,327205,00.html

:love:

*drool*

QUOTE
DAHLGREN, Va. —  A futuristic weapon getting a trial run by the Navy demonstrated its destructive power at the Naval Surface Warfare Center in Dahlgren.

In the demonstration Thursday, engineers fired the electromagnetic railgun at what they said was a record power level: 10 megajoules.

The previous railgun power-use record was about 9 megajoules of muzzle energy.



Railguns use electromagnetic energy to launch projectiles long distances — more than 200 nautical miles.

Because the railgun uses electricity and not gunpowder to fire projectiles, it eliminates the possibility of explosions on ships.

The Navy hopes the railgun will eventually replace the standard 5-inch gun on its ships. The weapon isn't expected to be deployed until at least 2020.

[A joule is defined as the energy needed to produce one watt of electricity for one second.

The railgun tested Thursday actually has a capacity of 32 megajoules, but the Navy is slowly building up the energy level in a series of tests.

That's a lot of power, but with a new series of electrically-powered ships coming on line, the Navy figures generating capacity will not be a problem.

According to the Navy, the railgun, when fully developed, will be able to launch solid projectiles at Mach 5, or about 3,700 mph.]
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hobgoblin
post Feb 1 2008, 02:16 PM
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electrically powered ships? more like they have some reactor or good old fashion diesel engine hooked up to a generator, and then runs some very big cables to the engines. electrically powered make it sound like they are running on big big banks of batteries...
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Nightwalker450
post Feb 1 2008, 02:20 PM
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Lots of sailors running around in giant hamster wheels will power the ships. Its a good exercise program :D
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Kyoto Kid
post Feb 1 2008, 04:38 PM
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QUOTE (hobgoblin)
electrically powered ships? more like they have some reactor or good old fashion diesel engine hooked up to a generator, and then runs some very big cables to the engines. electrically powered make it sound like they are running on big big banks of batteries...

...or a very long extension cord. :grinbig:
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stevebugge
post Feb 1 2008, 04:44 PM
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QUOTE (Kyoto Kid)
QUOTE (hobgoblin @ Feb 1 2008, 06:16 AM)
electrically powered ships? more like they have some reactor or good old fashion diesel engine hooked up to a generator, and then runs some very big cables to the engines. electrically powered make it sound like they are running on big big banks of batteries...

...or a very long extension cord. :grinbig:

Sounds like it's time to buy stock in the power company in Norfolk

Seriously they probably mean nuclear reactors
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mfb
post Feb 1 2008, 04:47 PM
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QUOTE (Nightwalker450)
Lots of sailors running around in giant hamster wheels will power the ships. Its a good exercise program

...which is why the Navy picked it up instead of the Air Force. OHHH!
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Stahlseele
post Feb 1 2008, 04:47 PM
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our(german) submarines are actually powered by big batteries or lithium ion accus or something like that . .
and yes, if damaged the Rail-Gun will STILL explode like crap . . because the formerly controlled electrical charge and the magnetic field in the capacitators and coils will get out of control and accellerate the parts of the Gun itself into various undesired directions
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bluedragon7
post Feb 1 2008, 05:40 PM
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QUOTE (Stahlseele)
our(german) submarines are actually powered by big batteries or lithium ion accus or something like that . .

fuel cells, a lot quieter than nuclear powered and higher endurance than the old diesel/battery subs
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Moon-Hawk
post Feb 1 2008, 06:01 PM
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QUOTE (bluedragon7)
QUOTE (Stahlseele @ Feb 1 2008, 04:47 PM)
our(german) submarines are actually powered by big batteries or lithium ion accus or something like that . .

fuel cells, a lot quieter than nuclear powered and higher endurance than the old diesel/battery subs

How do they recharge? Do they have to put in to refill their hydrogen tanks, or do they have a noisy nuke plant they can fire up to turn water into hydrogen?
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imperialus
post Feb 1 2008, 06:05 PM
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IIRC I think they still use a high efficancy diesel engines to charge the batteries. It's still a lot more efficiant than the old diesel electrics though and they have no moving parts outside of the shaft that turns the propeller so they're really quiet.
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Stahlseele
post Feb 1 2008, 06:10 PM
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and no more poisonous gas when hit by salt water . .
and if they are build with a quick release maybe they can just switch out whole fuel cells(yeah yeah you know it all <.<) on the fly from a supply-ship or something . .
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bluedragon7
post Feb 1 2008, 06:20 PM
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they have to refuel once a while to get new hydrogen and oxygen, but they can stay submerged for much longer than normal conventional subs, more than 2 weeks, which ist enormous for a nonnuclear sub

they still have a diesel to recharge batteries however


U 212
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hobgoblin
post Feb 1 2008, 06:24 PM
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there is always these babies:
http://en.wikipedia.org/wiki/Gotland_class_submarine
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bluedragon7
post Feb 1 2008, 06:32 PM
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they are also aip, using a sterling engine with diesel and liquid oxygen instead of fuelcells they still have to vent the gas outside, but dont need to snorkel to get the oxygen and Sterlingengines, while still having moving parts are also quieter than diesels
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Kyoto Kid
post Feb 1 2008, 06:40 PM
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...I remember seeing something about Sterling Engines back in the 70s.
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hobgoblin
post Feb 1 2008, 07:35 PM
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QUOTE (bluedragon7)
they are also aip, using a sterling engine with diesel and liquid oxygen instead of fuelcells they still have to vent the gas outside, but dont need to snorkel to get the oxygen and Sterlingengines, while still having moving parts are also quieter than diesels

strange that wikipedia say that they use diesel and liquid oxygen as tv program i watched had one of the people working onboard say they used a chemical that would burn without oxygen to produce the heat needed.

still, could very well be that i got some bad memory sectors...
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Fortune
post Feb 1 2008, 11:21 PM
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QUOTE (hobgoblin)
strange that wikipedia say that they use diesel and liquid oxygen as tv program i watched had one of the people working onboard say they used a chemical that would burn without oxygen to produce the heat needed.

Keep in mind the absolute unfailing reliability of Wikipedia. ;)
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hobgoblin
post Feb 1 2008, 11:33 PM
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i did a bit of searching, and other sites say the same. sadly the place that built it will not say anything specific about it...
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Stahlseele
post Feb 1 2008, 11:36 PM
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gee, wonder why O.o
perhaps you should find yourself a little group of specialists in breaking and entering/espionage and try to find out? o.O
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hobgoblin
post Feb 1 2008, 11:43 PM
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thing is, if they could talk about it on tv, why isnt it on the net?
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Stahlseele
post Feb 1 2008, 11:45 PM
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'cause on the net you'd probably actually find hard specs and not things like:"we're using that and that tech" . . you'd probably find things like:"they're using that and that tech together like this to acchieve this effect which in return does this so THIS actually happens which gives them THAT advantage"
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hobgoblin
post Feb 1 2008, 11:53 PM
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looks like i either have memory corruption, or the program was lied in the face:
http://www.kockums.se/Submarines/aipstirling.html

interestingly, thats their swedish page, but its in english. and it confirms that its running on diesel and oxygen.

i really would love to dig up the program i was watching and check if its me or the program...
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Stahlseele
post Feb 1 2008, 11:56 PM
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of course they lied into their face O.o
people don't go out and tell everybody and their mom all about the new technology they will be using . . they tell people THAT they will be using it, but they will not tell more than maybe 10% of truth to steer of the competition o.O
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hobgoblin
post Feb 2 2008, 12:01 AM
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and then the webpage of the maker of said engine goes around and say the truth?

what would then be the point of lying in the first place?

hell, its not like sweden have a direct enemy, like some other nations have...
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Stahlseele
post Feb 2 2008, 12:15 AM
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disinformation is one of the strongest weapons in war(and marketing pretty much seems to be a battlefield to me) . . but of course they need to tell the truth SOMETIMES to get funding for the other Weapons *g*
the difficulty is being able to lie to the mayority who is your enemy(and in marketing basically the rest of the world appearantly falls under this category) and still being able to convince the people you want to pay you that you're telling THEM the actual truth this time . .
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