Go Navy!

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ladajo
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Re: Go Navy!

Postby ladajo » Wed Apr 09, 2014 3:07 pm

Guided rounds are nerm term. One of the nice things about railgun is you can control the accel unlike a chemical gun.

Really, the main problem is the big bore cyclic rates. And that is a heating and, more importantly, pulsed power generation issue.

Smaller bores can do the high cyclic rates better. And you need cyclic rate for high speed and maneuvering targets.
One mitigation to this is the idea of Stupid Pebbles. It is the polar opposite of the Brilliant Pebbles concept. You toss out a round that is triggered or pre-timed to dispense a cloud of pellets doing Mach 5-7. Very bad news for something coming the other way.
The development of atomic power, though it could confer unimaginable blessings on mankind, is something that is dreaded by the owners of coal mines and oil wells. (Hazlitt)
What I want to do is to look up C. . . . I call him the Forgotten Man. (Sumner)

paperburn1
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Re: Go Navy!

Postby paperburn1 » Wed Apr 09, 2014 5:12 pm

this is old but it get the idea across
http://www.funker530.com/video-of-elect ... -u-s-navy/
I am not a nuclear physicist, but play one on the internet.

hanelyp
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Re: Go Navy!

Postby hanelyp » Wed Apr 09, 2014 7:14 pm

A swarm of "stupid pebbles" that break into shrapnel once above sensible atmosphere could make big trouble for an incoming missile. More so if the missile is counting on decoys or stealth on the active warhead. The same weapon could take on a pesky LEO satellite if political factors favor it.

If your rounds are cheap and high rate of fire very desirable to saturate a target area, it becomes time to think about stuff like water cooling for your gun.
The daylight is uncomfortably bright for eyes so long in the dark.

93143
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Re: Go Navy!

Postby 93143 » Thu Apr 10, 2014 10:13 am

I'd have thought they were already using liquid cooling, if heat dissipation is such an issue...

Betruger
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Re: Go Navy!

Postby Betruger » Thu Apr 10, 2014 1:50 pm

Pretty sure someone who knows Navy implied it at some point on T-P. That ships and subs use ocean water for cooling. I reckon it's pretty hard not to.

ladajo
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Re: Go Navy!

Postby ladajo » Thu Apr 10, 2014 2:14 pm

The Mk.75 76mm gun system uses active sea water cooling due to its high rates of fire capability (>80 rounds minute).
The Mk.45 5 inch gun systems do not actively cool. The have a rate of fire of about 20 rds/minute (dependent on round type and consistency).

Smaller caliber mounts are air cooled as well.

All ships use seawater for cooling of HM&E and propulsion systems. It is not hard to get seawater to a gun mount. It is more hard to keep up on the maintenance needs of doing so.
Railgun could well end up using a deionized freshwater cooling system that in turn dumps heat to seawater. Or it could run off its own dedicated refrigerant system. I am not sure what is in the works on that end. I do know that the bigger bore and higher rate of fire requirements will drive a cooling neccessity. The railgun system runs inherantly hot by its nature. And heat is bad for system life.
The development of atomic power, though it could confer unimaginable blessings on mankind, is something that is dreaded by the owners of coal mines and oil wells. (Hazlitt)

What I want to do is to look up C. . . . I call him the Forgotten Man. (Sumner)

KitemanSA
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Re: Go Navy!

Postby KitemanSA » Sun Apr 13, 2014 4:58 pm


KitemanSA
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Re:

Postby KitemanSA » Sun Apr 13, 2014 5:04 pm


paperburn1
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Re: Go Navy!

Postby paperburn1 » Sun Apr 13, 2014 5:22 pm

I am not a nuclear physicist, but play one on the internet.

GIThruster
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Re: Go Navy!

Postby GIThruster » Thu Jun 19, 2014 8:10 pm

I would be very interested to hear the foliks analysis of this new weapon.

http://gizmodo.com/the-sub-that-took-ru ... socialflow

Seems to me if this were designed today, it would be designed to launch while submerged. I thought LockMart had already proved that capability about a dozen years ago. Wasn't there even vid on youtube of such launches?
"Courage is not just a virtue, but the form of every virtue at the testing point." C. S. Lewis

Skipjack
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Re: Re:

Postby Skipjack » Thu Jun 19, 2014 8:24 pm


ladajo
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Re: Go Navy!

Postby ladajo » Thu Jun 19, 2014 11:22 pm

The development of atomic power, though it could confer unimaginable blessings on mankind, is something that is dreaded by the owners of coal mines and oil wells. (Hazlitt)

What I want to do is to look up C. . . . I call him the Forgotten Man. (Sumner)

ladajo
Posts: 6204
Joined: Thu Sep 17, 2009 11:18 pm
Location: North East Coast
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Re: Go Navy!

Postby ladajo » Thu Jun 19, 2014 11:45 pm

The development of atomic power, though it could confer unimaginable blessings on mankind, is something that is dreaded by the owners of coal mines and oil wells. (Hazlitt)

What I want to do is to look up C. . . . I call him the Forgotten Man. (Sumner)

ladajo
Posts: 6204
Joined: Thu Sep 17, 2009 11:18 pm
Location: North East Coast
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Re: Go Navy!

Postby ladajo » Thu Jun 19, 2014 11:56 pm

There is no-one close in experience and capability for submarines.

This is the sort of things we do to be in a league of our own, and note how long we have been at this;

http://www.navy.mil/navydata/cno/n87/us ... ealth.html

The new Russian boat is a 1980s design. It is not really worth a crap.
The development of atomic power, though it could confer unimaginable blessings on mankind, is something that is dreaded by the owners of coal mines and oil wells. (Hazlitt)

What I want to do is to look up C. . . . I call him the Forgotten Man. (Sumner)

GIThruster
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Re: Go Navy!

Postby GIThruster » Fri Jun 20, 2014 2:17 pm

I seem to recall one of the big deals with the Virginia class is the phased multi-frequency array that spans most of its hull. Spherical does indeed sound like a step backward, as does the requirement to surface in order to launch cruise missiles.
"Courage is not just a virtue, but the form of every virtue at the testing point." C. S. Lewis


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