PLAN Anti-ship/surface missiles
- Thread starter tphuang
- Start date
We have no way of knowing how many they have in service simply based on their presence at the parade, and we don't have other information to shed light on it either.
But their presence at the parade does mean they've probably been in service for at least a little while.
antiterror13
Brigadier
What I meant ..... YJ-12 for coastal defence missile system
As far as we know, YJ-12 does not have a ground launched version, so there is probably zero YJ-12s in the coastal defence role.
antiterror13
Brigadier
Post #125 on page 13 shows ground launched version of YJ-12
See my post 127.
YJ-18?
YJ-12. (check the literal previous couple of posts lol)
continued from here
https://www.sinodefenceforum.com/russian-military-news-reports-data-etc.t1545/page-247#post-361129
First off, there are two things we can confirm: that the new common VLS is capable of both hot launch (via CCL venting system) or cold launch, and also that the new common VLS is capable of quad packing missiles.
How it achieves it, has been a subject of discussion, but first it's useful to appreciate how the standard cold and hot launch mechanisms work for the specific VLS.
The way I envision it, is that each individual missile cell (with 8 cells in each module) may have a "default slot structure" which is able to fit both a cold launch missile canister, or a hot launch missile canister.
A cold launch missile canister obviously doesn't require venting, so it doesn't have to interact with the "default slot" of the missile cell it is sitting in, beyond physically sitting securely inside and being electronically wired to the cell and the rest of the ship. The fact that a missile cell won't require to give up volume for venting exhaust means the entire width of the cell can allow for a larger diameter missile compared to if it was used for hot launch.
For hot launch, a missile and its canister may have to interact directly with the cell as they have to vent exhaust out. The surfaces which directly come into contact with the exhaust itself must be able to withstand the heat, so chances are the surfaces will need to be quite heavy and well insulated (relative to a surface which does not need to withstand the exhaust). The way I imagine it could work, is that the "default slot structure" of the actual missile cell may be made up of heat resistant materials, and if the hot launch missile canister wall is also made of heat resistant materials. They could also make it so that the entire hot launch missile canister is made up of two "sandwiched" heat resistant walls (a rectangular prism within a rectangular prism) but I think that would make the entire missile canister heavier.
A more customized hot launch method is to alter the geometry of the missile canister itself, so as to allow for the same volume of space needed for venting exhaust but to shape the heat resistant wall structure around the missile's shape and fins itself...
From the above quad packed launch mechanism can work a few ways. And I've drawn them out. The outer black lines depict the default missile cell which is heat resistant, while the green lines depict cold launch missile canisters, the red lines depict the heat resistant wall of a hot launch missile canister, and orange depicts where the exhaust would be vented. The grey circles are depictions of missiles. Be in awe of my microsoft paint skills.
1: cold launch quad pack, would basically be identical to the way sea ceptor is quad packed. It's just four smaller cold launch missile canisters sitting with a single missile cell. Venting isn't part of the equation. This is probably the simplest method and the method to get the largest diameter of missile as well.
2: hot launch quad pack version 1, it is not dissimilar to the way missiles are quad packed in Mk-41 style modules, only that instead of having a central common exhaust for all 8 missile cells in a module, the exhaust is between the surrounding missile canister and the missile cell wall which are heat resistant. Your original question of how the launch of one missile won't result in the launch of all missiles is answered in the same way as how ESSM in Mk-41 is launched. Each of the quad packed canisters within a single missile cell are isolated from the other three canisters in the cell, so when one ignites the others are left undisturbed. The only difference is that instead of the exhaust being channeled to a common module vent, the exhaust is channeled around the missiles instead, where the missile canister's interior which contains the other three missiles are effectively "protected" from the exhaust. Note, the blue lines "within" the heat resistant walls of the missile canister are not heat resistant as they do not need to be; the exhaust will be directed under and "around" the heat resistant structure of the missile canister and the exhaust will be prevented from re-entering each individual small missile canister via the same mechanism that Mk-41 hot launch quad packs prevent each individual missile within a cell from igniting.
3: hot launch quad pack version 2, is a more complex way of doing it and one which I think is not likely. It's basically derived from the idea of adapting the missile canister's heat resistant walls to the actual shape and fins of the missile itself, so no potential venting space is wasted as empty space. It means the walls of the missile canister
will all have to be heat resistant, and also be of a more complex geometry, but it will potentially allow larger diameter missiles to be fired. Like I said, this is probably unlikely but it's a good thought experiment to understand how the overall CCL VLS system works.
https://www.sinodefenceforum.com/russian-military-news-reports-data-etc.t1545/page-247#post-361129
First off, there are two things we can confirm: that the new common VLS is capable of both hot launch (via CCL venting system) or cold launch, and also that the new common VLS is capable of quad packing missiles.
How it achieves it, has been a subject of discussion, but first it's useful to appreciate how the standard cold and hot launch mechanisms work for the specific VLS.
The way I envision it, is that each individual missile cell (with 8 cells in each module) may have a "default slot structure" which is able to fit both a cold launch missile canister, or a hot launch missile canister.
A cold launch missile canister obviously doesn't require venting, so it doesn't have to interact with the "default slot" of the missile cell it is sitting in, beyond physically sitting securely inside and being electronically wired to the cell and the rest of the ship. The fact that a missile cell won't require to give up volume for venting exhaust means the entire width of the cell can allow for a larger diameter missile compared to if it was used for hot launch.
For hot launch, a missile and its canister may have to interact directly with the cell as they have to vent exhaust out. The surfaces which directly come into contact with the exhaust itself must be able to withstand the heat, so chances are the surfaces will need to be quite heavy and well insulated (relative to a surface which does not need to withstand the exhaust). The way I imagine it could work, is that the "default slot structure" of the actual missile cell may be made up of heat resistant materials, and if the hot launch missile canister wall is also made of heat resistant materials. They could also make it so that the entire hot launch missile canister is made up of two "sandwiched" heat resistant walls (a rectangular prism within a rectangular prism) but I think that would make the entire missile canister heavier.
A more customized hot launch method is to alter the geometry of the missile canister itself, so as to allow for the same volume of space needed for venting exhaust but to shape the heat resistant wall structure around the missile's shape and fins itself...
From the above quad packed launch mechanism can work a few ways. And I've drawn them out. The outer black lines depict the default missile cell which is heat resistant, while the green lines depict cold launch missile canisters, the red lines depict the heat resistant wall of a hot launch missile canister, and orange depicts where the exhaust would be vented. The grey circles are depictions of missiles. Be in awe of my microsoft paint skills.
1: cold launch quad pack, would basically be identical to the way sea ceptor is quad packed. It's just four smaller cold launch missile canisters sitting with a single missile cell. Venting isn't part of the equation. This is probably the simplest method and the method to get the largest diameter of missile as well.
2: hot launch quad pack version 1, it is not dissimilar to the way missiles are quad packed in Mk-41 style modules, only that instead of having a central common exhaust for all 8 missile cells in a module, the exhaust is between the surrounding missile canister and the missile cell wall which are heat resistant. Your original question of how the launch of one missile won't result in the launch of all missiles is answered in the same way as how ESSM in Mk-41 is launched. Each of the quad packed canisters within a single missile cell are isolated from the other three canisters in the cell, so when one ignites the others are left undisturbed. The only difference is that instead of the exhaust being channeled to a common module vent, the exhaust is channeled around the missiles instead, where the missile canister's interior which contains the other three missiles are effectively "protected" from the exhaust. Note, the blue lines "within" the heat resistant walls of the missile canister are not heat resistant as they do not need to be; the exhaust will be directed under and "around" the heat resistant structure of the missile canister and the exhaust will be prevented from re-entering each individual small missile canister via the same mechanism that Mk-41 hot launch quad packs prevent each individual missile within a cell from igniting.
3: hot launch quad pack version 2, is a more complex way of doing it and one which I think is not likely. It's basically derived from the idea of adapting the missile canister's heat resistant walls to the actual shape and fins of the missile itself, so no potential venting space is wasted as empty space. It means the walls of the missile canister
will all have to be heat resistant, and also be of a more complex geometry, but it will potentially allow larger diameter missiles to be fired. Like I said, this is probably unlikely but it's a good thought experiment to understand how the overall CCL VLS system works.
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