They haven't even started the Zumwalt yet. In fact, has a final design even been chosen yet? I know there is still a lot of debate over whether it's going to be nuclear or not...
I did some digging to see when these would enter service. I think the navy really misunderstood the roll they would be playing in the next decade. Or the designers were allowed just a little too much freedom.
MISSION ORIENTATION and DESIGN FEATUR’S
It is to be a multi mission destroyer with an emphasis on naval surface fire support and operations in littoral water? This ship is 600ft long has a beam of 80ft with a draught of 27.6ft and loaded displaces 14797 ton??????
It’s to have a reduced size crew of 142 sailors’. (Half the crew of the DDG-51 Class) The superstructure is partly of composite materials. It will have a new kind of VLS along with two 155mm advanced gun system(AGS).Which will fire a new rocket-assisted shell out to ranges over 60 nm. Two were procured in FY 2007 for $6,634.2 million for both.
The last DDG-51 # 63 will enter service around 2012 and these were to start rolling out right behind but the navy wants’ to stop production at two until FY2017 and build at least eight more DDG-51.
In August 2008 Adm. Gary Roughead, chief of naval operations had this to say about the class.
“The DDG-1000 Zumwalt class destroyer does not have the crucial missile and air defense capabilities and defending against submarines would be difficult. I started looking at the DDG-1000, it has a lot of technology but it cannot perform broader intergraded air and missile defense. Submarines can get very close and it does not have the ability to take on the treat.”
So as of right now the navy would like eight more DDG-51 after number 63 is complete. Then use the two Zumwalt’s as a proof of concept .and deal with the DDG-1000 and the CGX around 2017. Those two classes may share the same hull.
All the info is in PDF so I will post the like below
http://fas.org/sgp/crs/weapons/RL32109.pdf