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Bob Adams
09-07-2016, 07:09 PM
For commissioning. I'll try to get some pictures from my boat. Was this designed by the same people who designed Steve Job's "yacht"?

https://upload.wikimedia.org/wikipedia/commons/3/32/Future_USS_Zumwalt's_first_underway_at_sea.jpg

jack grebe
09-07-2016, 07:13 PM
Bolger design?

katey
09-07-2016, 07:42 PM
Bolger design?

Yes! Jack, I think you've nailed it!

Bob Adams
09-08-2016, 06:04 AM
The Zumwalt. She looks like what she is....a warship.

THIS looks like a warship!

http://www.maritimequest.com/warship_directory/us_navy_pages/us_navy_battleship_photos/uss_missouri_bb63/bb63_b.jpg

Bob Adams
09-08-2016, 07:13 AM
Of course. But I didn't know we were talking radar signatures.

Bob Adams
09-08-2016, 07:33 AM
I see. You thought Zumwalt's design was a style statement.

No. I'm lamenting the lack of aesthetics in pretty much all larger vessels. And many smaller ones too.

mmd
09-08-2016, 07:44 AM
It will be interesting to hear of the results of open-ocean sea-trials. There are many experienced voices saying that there are hull instability issues, as evidenced by this December 2015 Defense News article that quotes an earlier story from April 2007:

"At least eight current and former officers, naval engineers and architects and naval analysts interviewed for this article expressed concerns about the ship’s stability.

One former flag officer, asked about DDG 1000, responded by putting out his hand palm down, then flipping it over. “You mean this?” he asked.

Ken Brower, a civilian naval architect with decades of naval experience was even more blunt: “It will capsize in a following sea at the wrong speed if a wave at an appropriate wavelength hits it at an appropriate angle.”

The Navy and the lead contractors, Northrop Grumman and General Dynamics, disagree. Officials from both contractors deferred to the Navy when asked about the design.

Navy leaders say the ship is stable and that they continue to test and refine the design."

More here: http://www.defensenews.com/story/defense/naval/navy/2015/12/03/zumwalt-ddg1000-shipbuilding-navy-ships-tumblehome-stealth/76728838/

Canoez
09-08-2016, 08:06 AM
Her commanding officer is Captain James Kirk. :ycool:

Have they installed photon torpedoes yet? :d

I know they've done trials of laser systems on Navy ships and some portable ones at White Sands.

Willin'
09-08-2016, 08:13 AM
Here she is sailing downriver yesterday.

https://scontent-lga3-1.xx.fbcdn.net/v/t1.0-9/14222362_10207214552870272_1437335956817086017_n.j pg?oh=e8dcb16c7122d68c267c7553212db6bc&oe=587EDD9B

https://scontent-lga3-1.xx.fbcdn.net/v/t1.0-9/14191979_10207214553670292_3159535919250450654_n.j pg?oh=753da0b438a805677d942e2b4ce08745&oe=587BED53

These are the biggest destroyers ever built for the US Navy. Seems counter-intuitive that they be designed for littoral combat.

ETA personally, when seen alongside the Arleigh Burke boats, the Zumwalts look far more menacing, even with no weapons visible. More like something from Lucasfilms than Victory At Sea.

L.W. Baxter
09-08-2016, 08:25 AM
...There are many experienced voices saying that there are hull instability issues...]

Nothing a couple elegant welded sponsons can't fix, I trust.

Vince Brennan
09-08-2016, 08:33 AM
Nothing a couple elegant welded sponsons can't fix, I trust.

Now, now.... she ain't Quebecquois...

mmd
09-08-2016, 08:39 AM
My understanding of the issue is the lack of reserve buoyancy created by the continuous tumble-home hull. If the stern gets lifted at an angle by a following sea when the vessel is travelling at a speed only slightly slower than the wave train, the bow (which, due to its shape has very little reserve buoyancy) will submerge, the boat will pivot on the planted bow (broach-to), the sharp turn will induce a roll that cannot be compensated for by hull volume due to the inward-angles ship's sides, the following sea will gain more surface to act on as the ship turns, and she will roll over. Granted, to have this occur will require that all the stars align just so, but military ships must be able to survive such events because, by the nature of what they do, they are at sea more and in more nasty sea states than commercial ships, who can steam away from storms.

Canoez
09-08-2016, 08:40 AM
Nothing a couple elegant welded sponsons can't fix, I trust.

You owe me a coffee.

David W Pratt
09-08-2016, 09:48 AM
Reminiscent of the Nautilus in League of Extraordinary Gentlemen

mmd
09-08-2016, 09:53 AM
The similarity between the Zumwalt and the superyacht "A" have been noted by others:

http://uploads.boatshowavenue.com/news/N015121574/preview/preview-1449609170TWO.jpg

Bob Adams
09-08-2016, 03:46 PM
My understanding of the issue is the lack of reserve buoyancy created by the continuous tumble-home hull. If the stern gets lifted at an angle by a following sea when the vessel is travelling at a speed only slightly slower than the wave train, the bow (which, due to its shape has very little reserve buoyancy) will submerge, the boat will pivot on the planted bow (broach-to), the sharp turn will induce a roll that cannot be compensated for by hull volume due to the inward-angles ship's sides, the following sea will gain more surface to act on as the ship turns, and she will roll over. Granted, to have this occur will require that all the stars align just so, but military ships must be able to survive such events because, by the nature of what they do, they are at sea more and in more nasty sea states than commercial ships, who can steam away from storms.

In short in a following sea they need to put the spurs to her!

Canoez
09-08-2016, 03:51 PM
Have they installed photon torpedoes yet? :d

I know they've done trials of laser systems on Navy ships and some portable ones at White Sands.

Photon torpedoes are here! :eek:

http://www.navair.navy.mil/img/uploads/150812-N-JQ696-011.jpg

Bob Adams
09-08-2016, 03:52 PM
Damn if it doesn't look like one!

Canoez
09-08-2016, 03:56 PM
500 nm range and a 1000 pound warhead... Air or ship launch, apparently. LRASM.

SMARTINSEN
09-08-2016, 06:50 PM
What is an Integrated Power System?

skuthorp
09-09-2016, 05:04 AM
I am reminded of Civil War ironclads.
http://steamboattimes.com/images/civil_war/ironclad_ussstlouis_firsteadsironclad_cityclass_re named_baron_de_kalb_oct1862_1581x971.jpg



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Rich Jones
09-09-2016, 10:57 AM
$4.5 billion. Yikes!