US Navy DDG 1000 Zumwalt Class

Jura The idiot

Jura The idiot

General
Jeff Head said:
...

Clearly the 57mm gun is more capable. 20 round per minute faster and seven miles further range. But they are significantly lighter and less expensive.

...
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now I looked also at the 30mm Mk 46 (for example I downloaded the brochure from:
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and the total weight is about 4000 pounds (3120 gun plus 400*1.5 per typical 30 mm round:
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which would be less than two tons; but
7 tons for 57mm Mk 110 + 7 tons for 1000 57mm rounds, according to:
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(what's probably important it's top weight -- not something put under deck)

I also downloaded the presentation of the 30 mm tests:
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if spotted at 2 km, a Fast Attack Craft (with suicidal crew) wouldn't make it against either gun
 
O

ohan_qwe

Junior Member
What kind of armament is expected on the Fast Attack Crafts, I am pretty sure that no one is stupid enough to attack with an RPG or by ramming a destroyer. If they are armed with missile like hellfire or penguin equivalent with more than 5km range wouldn't that make the 30mm gun useless?
 
Jura The idiot

Jura The idiot

General
ohan_qwe said:
What kind of armament is expected on the Fast Attack Crafts, I am pretty sure that no one is stupid enough to attack with an RPG or by ramming a destroyer.
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ohan_qwe said:
If they are armed with missile like hellfire or penguin equivalent with more than 5km range wouldn't that make the 30mm gun useless?
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somebody in the Internet suggested the attackers might arrive with
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and stay out of range of the 30 mm ... then it would've been appropriate to use the 57 mm or more :)
 
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asif iqbal

asif iqbal

Lieutenant General
Add a Zumwalt lead ship along with 4 x Arleigh Burke DDG with a under screen by a Virginia Class SSN then you have a powerful action group

I bet some people will look at the Zumwalt and go what the hell is this!
 
thunderchief

thunderchief

Senior Member
ohan_qwe said:
What kind of armament is expected on the Fast Attack Crafts, I am pretty sure that no one is stupid enough to attack with an RPG or by ramming a destroyer. If they are armed with missile like hellfire or penguin equivalent with more than 5km range wouldn't that make the 30mm gun useless?
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Depends how would you define FAC . For example, even small Komar-class (under 70t ) carried two fairly large Styx missiles.
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In modern times, price of good SSM could exceed price of the boat. Therefore, countries like Iran usually have limited numbers of them , so they place them on more capable (larger) platforms .
 
O

ohan_qwe

Junior Member
thunderchief said:
Depends how would you define FAC . For example, even small Komar-class (under 70t ) carried two fairly large Styx missiles.
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In modern times, price of good SSM could exceed price of the boat. Therefore, countries like Iran usually have limited numbers of them , so they place them on more capable (larger) platforms .
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What kind of FAC is the intended target for the 30mm gun? I always thought that it was Iranian speedboats. Don't they have guided/unguided weapons that out range the 30mm gun? For example
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or
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Jeff Head

Jeff Head

General
Registered Member
ohan_qwe said:
What kind of armament is expected on the Fast Attack Crafts, I am pretty sure that no one is stupid enough to attack with an RPG or by ramming a destroyer. If they are armed with missile like hellfire or penguin equivalent with more than 5km range wouldn't that make the 30mm gun useless?
Click to expand...
The 30 mm gun is not meant to destroy vessels that would attack the DDG with missile of any sort. it is meant to ensure that no fast spped boat or other vessel gets close enough to ram the vessel and attempt to set off explosives.

The Zumwalt class will have plenty of other assets to deal with larger vessels, or FACs with anti-shipping missiles at range. Ultimately the AGS will have anti-surface rounds, the Zumnwalt will employ the LRASM, and they have helicopters of their own that can operate in an anti-surface role depending on the target.

In a close in, self defense role, the 30mm guns have a very specific set of targets in mind.
 
Jura The idiot

Jura The idiot

General
I'll never know but I wonder what was the true reason for that guns swap ... I went again through the links in http://www.sinodefenceforum.com/wor...dg-1000-zumwalt-class-13-5546.html#post304339 ...
the official info wasn't helpful to me (mentions the commonality of 30 mm -- but there would've been commonality in 57 mm, I guess: http://www.sinodefenceforum.com/world-armed-forces/littoral-combat-ships-lcs-37-3993.html#post304288)
...
would it be possible that somebody wanted to save one percent of the cost of a three-billion-dollars warship? (I saw somewhere in the Internet a copy of 57 mm in its stealth cupola could cost $20m, 30 mm in a simpler turret is much cheaper, that's why I said 1%)
...
would it be possible that somebody wanted to save 25 out of 14,564 tons? (my estimate of the weight difference of the guns: http://www.sinodefenceforum.com/wor...dg-1000-zumwalt-class-14-5546.html#post304762) ... if so, why now?? the specs of 57 mm "Close-In Gun System" have been known for at least ten years so was it necessary to "recently redesign" the Zumwalt-class?
...
anyway, just some thought from the middle of Europe :)
 
FORBIN

FORBIN

Lieutenant General
Registered Member
Jeff Head said:
Ultimately the AGS will have anti-surface rounds
In a close in, self defense role, the 30mm guns have a very specific set of targets in mind.
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Jeff your sure actually AGS is only capable do bombardement can' t attack surface ships ?
In this case the replacement of 57 mm is very boring, 30 mm small gun, usefull against little ships only...

For shell i have a accuracy of 20/50 m, qty 300 by turret and in more 320 for all u confirm ?
 
TerraN_EmpirE

TerraN_EmpirE

Tyrant King
Gas turbine fired up on stealthy warship in Maine
Sep. 24, 2014 - 08:10AM |


The Associated Press

BATH, MAINE — Shipbuilders at Maine’s Bath Iron Works have fired up one of the main turbines aboard the future USS Zumwalt, marking a milestone in construction of the stealthy warship.

Engineers and technicians have spent months testing systems and preparing for lighting the marine turbines, which are similar to units used on the Boeing 777. Powered by military-grade jet fuel, the massive turbines will provide the grunt for electric generators that’ll drive the largest destroyer ever built for the U.S. Navy.

Spokesman Matt Wickenheiser said one of the main turbine units was started for the first time on Tuesday.

When it heads to sea next year for builder trials, the 610-foot-long warship will be the first electric-drive surface combatant built for the U.S. Navy since a line of smaller destroyer escorts in the 1940s. The Zumwalt’s two main generators, along with two auxiliary units, can produce 78 megawatts, enough electricity for about 10,000 homes.

Originally envisioned as a “stealth destroyer,” the ship features a composite deckhouse that hides radar and antennas along with sharp angles that deflect radar signals. Its unusual wave-piercing hull was designed to minimize the ship’s wake.

The Zumwalt’s big price tag — more than $3.5 billion — nearly caused the Navy to scuttle the program. Instead, it reduced the number of ships to just three. The builder, Bath Iron Works, is a subsidiary of General Dynamics.
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