052C/052D Class Destroyers

Totoro said:

Yeah it's difficult to judge. I'm not saying it's 100% sure that it's coming from inside the circle or the outside of the circle. Or perhaps there could be a combination. What the thickness of the plume does suggest is that even if there is some exhaust coming from the sides, it's not uniform, and some parts of the side wall do not seem to feature any exhaust plumes.

Coincidently, Mk41 vls has 569 mm inner cell width. Diameter of Tomahwk missile body is 520 mm. So, assuming there's not an piece of folded fin protruding outside of that diameter, there's still roughly 25 mm of clearance between the missile and the cell wall.

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You're going to have to figure it out with computational fluid dynamics.

Lethe said:

Doesn't the exhaust for hot launch vent through the space between the inner circular missile housing and the square wall of the cell?

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Apparently not, although @Interstellar mentioned that CASC was investigating the concept. I remember seeing a schematic of the CCL posted here a while back and it showed the gas vents sandwiched between the inner and outer walls of the launch tube. If the gas vented as you describe, it would have a four corners pattern like this

If the exhaust is vented between inner and outer circular walls of the missile housing, with material thicknesses and spacing at each level, that does call into question the maximum missile diameter for hot launch and whether it is in fact any larger than Mk. 41/57.

I would assume that the maximum missile diameter for cold launch missiles is somewhat larger, lacking the inner circular wall and corresponding venting space that hot launch requires, but with reduced maximum length to accommodate the compressed gas ejection system at the base of the missile.

The theory of CCL is that it should indeed have a ring, outside the area holding the missile, which is used for exhaust.

But what I am interested in is the analysis of the actual image of the system. Looking at the image, I am not seeing the
said theory applied. That'd be the middle part of the image, two concentric red circles. As one can see, the hottest part
of the plume seems to be coming from the center of the smaller circle, NOT from the area between two circles.

The same middle image, on the left, shows red and yellow rectangles. They are to point to another possibility of exhaust,
in theory. That either there are four large-ish exhausts, marked red, each in one corner. Or that there are slim, yellow exhaust
areas. Or that there are both of those active.

But, looking at both the image of the unfired cell and looking at the image of the cell that is being fired and that will
see the missile come out of it within a second, those areas, farthest away from the centre and closest to the cell walls
seem to have either NO exhaust openings and NO plumes coming out from them (as shown with blue, on right most image)

or even if the image does play tricks on our eyes and there somehow are some openings - it's again clear the most exhaust
is coming from the center of the whole cell.

121 qiqihar entered service on Apr 1' 2020. #5 from Batch 2, #14 Overall.

Dalian update.

Bhurki said:

121 qiqihar entered service on Apr 1' 2020. #5 from Batch 2, #14 Overall.

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Any view perhaps?

Some images to celebrate PLAN’s 71st anniversary.

The lead ship 0f the Type-052D (DDG 172 Kunming) under construction.


Kunming seen here on the day of her handover ceremony. Next to her is a 052C, a predecessor class.

C vs. D...

by78 said:

C vs. D...

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Uh that's 054's system in the second pic