052/052B Class Destroyers

re: PLAN Type 052 Class Destroyer

no_name said:

The Ford has (or will be?) but it is on the bridge superstructure

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That is correct.

Here's the USS Gerald R. Ford preparing to be floated in dry dock next week, and then officially launched next mong.

from the stern, you can see the two sets of arrays on the angled Island panels:



Then, form the front, you can see where they will go planar to the bow.

re: PLAN Type 052 Class Destroyer

Jeff Head said:

That is correct.

Here's the USS Gerald R. Ford preparing to be floated in dry dock next week, and then officially launched next mong.

from the stern, you can see the two sets of arrays on the angled Island panels:

Then, form the front, you can see where they will go planar to the bow.

Click to expand...

Are those the same radars zumwalt will be equipped with? An S band and X band AESA?

Any idea regarding their size and TR element number?

re: PLAN Type 052 Class Destroyer

My opinion is that the Ford chosed the 3 -piece design to minimise obstruction to views from bridge the flight deck operations. The front panel will cover the front 180 degrees while the two on the back will cover the back 180. The placement also needs to consider potential obstruction from the large fight deck/hull of the carrier itself planes moving about.

re: PLAN Type 052 Class Destroyer

kwaigonegin said:

I think the next 10 years will be EVEN more interesting than the previous ten. .................

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You think ?

re: PLAN Type 052 Class Destroyer

no_name said:

My opinion is that the Ford chosed the 3 -piece design to minimise obstruction to views from bridge the flight deck operations. The front panel will cover the front 180 degrees while the two on the back will cover the back 180. The placement also needs to consider potential obstruction from the large fight deck/hull of the carrier itself planes moving about.

Click to expand...

I believe it would be impossible to use a flat phased array to cover 180 degrees field of view. The array will lose all ability to form and focus a beam as the intended angle of the beam approach parallel with array surface, and effective aperture size of the emitting and receiving array approaches zero.

The maximum angle that can be covered by a single flat phased array without serious performance degradation near the edge of the field of view is probably about 120 degrees. But any flat array will experience some performance degradation when pointing a beam away from perpendicular to the array surface due to loss of effective aperture size.

It is possible to build a cylindrical or even spherical phased array that presents a constant effective aperture in all directions and covers 360 degrees without any performance loss in any direction. But unless the cylindrical object on the mast of the admiral Kuznetsov and the former Baku is an attempt at a cylindrical phased array, I know of no such design in service.

Regarding the question asked earlier about why no one has built a tall slim phase array to fit onto the sides of masts, the answer is such an array would have a big effective aperture in the vertical dimension and a small effective aperture in the horizontal direction, resulting in high resolution in elevation but poor resolution in azimuth. This is precisely the opposite of what is desired in a surveillance radar.

re: PLAN Type 052 Class Destroyer

chuck731 said:

I believe it would be impossible to use a flat phased array to cover 180 degrees field of view. The array will lose all ability to form and focus a beam as the intended angle of the beam approach parallel with array surface, and effective aperture size of the emitting and receiving array approaches zero.

The maximum angle that can be covered by a single flat phased array without serious performance degradation near the edge of the field of view is probably about 120 degrees. But any flat array will experience some performance degradation when pointing a beam away from perpendicular to the array surface due to loss of effective aperture size.

It is possible to build a cylindrical or even spherical phased array that presents a constant effective aperture in all directions and covers 360 degrees without any performance loss in any direction. But unless the cylindrical object on the mast of the admiral Kuznetsov and the former Baku is an attempt at a cylindrical phased array, I know of no such design in service.

Regarding the question asked earlier about why no one has built a tall slim phase array to fit onto the sides of masts, the answer is such an array would have a big effective aperture in the vertical dimension and a small effective aperture in the horizontal direction, resulting in high resolution in elevation but poor resolution in azimuth. This is precisely the opposite of what is desired in a surveillance radar.

Click to expand...

You are right I did not consider effective aperture. However from the frontal view it seems that only the front panel would be visible so maybe they will install a raised phase array that is not on a flat surface.

re: PLAN Type 052 Class Destroyer

The Most recent 052C/D Video:

[video]http://www.56.com/u49/v_OTg2MDgwODY.html/1030_zcwshw.html[/video]

re: PLAN Type 052 Class Destroyer

Type 052 (yes, it is 052, not A, B or C) No.113 Qingdao and Type 054A no.547 Linyi visiting Oakland Pier, New Zealand... for . This stop should be after the fleet review.

I will include Type 054 FFG & a PLAN auxillary ship here as it it part of the exercise.



More pictures

re: PLAN Type 052 Class Destroyer

Type 052 (yes, it is 052, not A, B or C) No.113 Qingdao and Type 054A no.547 Linyi visiting Oakland Pier, New Zealand... for . This stop should be after the fleet review.

I will include Type 054 FFG & a PLAN auxillary ship here as it it part of the exercise.


More pictures

re: PLAN Type 052 Class Destroyer

Type 052 (yes, it is 052, not A, B or C) No.113 Qingdao and Type 054A no.547 Linyi visiting Oakland Pier, New Zealand... for . This stop should be after the fleet review.

I will include Type 054 FFG & a PLAN auxillary ship here as it it part of the exercise.



More pictures