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Ddg-51 Flight Iii Destroyers


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#1 Dawes

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Posted 11 May 2018 - 0957 AM

On the artist's rendering, do the SPY-6 radar faces look smaller than the older SPY-1 types?:

 

https://www.defensen...r-construction/


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#2 Josh

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Posted 11 May 2018 - 1011 AM

Supposedly Flight III has slightly bigger radar panels (14' vs 12' according to Wiki).

Besides SPY-6/AMDR, what improvements have been made to Flight III?
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#3 Dawes

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Posted 11 May 2018 - 1024 AM

​From the article:

 

The Flight III is a major overhaul of the guided-missile destroyer. It required a 45 percent redesign of the hull, most of which was done to accommodate the AN/SPY-6 and its formidable power needs.

 
 

The air and missile defense radar destined for Jack Lucas and its sister follow-on destroyers is 30 times more sensitive than the AN/ SPY-1D radars on the previous ships, additional sensitivity that will supercharge its capabilities in anti-air warfare and ballistic missile defense.

 

Coupled with ongoing Surface Electronic Warfare Improvement Program upgrades, the Jack Lucas will also have increased passive capabilities. When used in conjunction with other off-board passive sensors, such as with the F-35 fighter jet, it will be able to triangulate and locate a target without going active and giving away the ship’s position.


Edited by Dawes, 11 May 2018 - 1025 AM.

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#4 JasonJ

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Posted 11 May 2018 - 1030 AM

Flight III will use SPY-6. The radars of SPY-6 use GaN, as opposed to previous GaAS based radars. GaN based radars can operate at higher temperature and take in much more power, thus are much more sensitive and have better detection range. So slightly smaller GaN based radar should still outperform GaAS based radrs. Akizuki-class destroyer radars are pretty small but are GaN based.


Edited by JasonJ, 11 May 2018 - 1031 AM.

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#5 Josh

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Posted 11 May 2018 - 1229 PM

I think it would be more accurate to say GaN radars can operate at a much higher gain, not sensitivity, if we're just talking about how much power is being beamed?
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#6 JasonJ

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Posted 11 May 2018 - 1839 PM

The word sensitivity is used, but in what technical meaning, I can't say for sure. Perhaps better ability to discriminate between aircraft and other things like birds.
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#7 Dawes

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Posted 11 May 2018 - 1909 PM

"Sensitivity" is mentioned in this Raytheon infographic, but not elaborated on:

 

https://www.raytheon...graphic-pdf.pdf


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