FFG 054/054A Thread

[nemo]

You would be surprised at how backward some military tech is -- particularly to maintain compatibility with existing HW such as missile stockpile. I developed flight control computer some years ago, so I have some idea about how surprisingly low tech it is -- but that's another issue.


The key to ethernet is simple-- how to resolve collision if two transmit at same time. The solution is simple -- each back off and re-transmit at random time later, and no one may transmit when the other is transmitting. This is simple enough when the more difficult part is already solved -- such as transmitting and receiving data reliably.
I really don't see why a variant of the scheme cannot be applied.

 

[crobato]

I see two ranges when quoted for the SR-64, 8000m and 100km. Given the size of the antenna, I would say 100km would be the maximum range. 8000m could be like a minimum range, which then Rice Lamp or CIWS radar takes over. The shortest range radar would be the one with the highest scan refresh and data transfer rates.

As Feng said, I was thinking that the SR-64 could be providing midcourse updates, with the Orekh clones taking over at the terminal phase. This is a change from the Russian configuration where the Top Plate provides both volume search and tracking capability into one. Of course the danger of the latter approach is that once the Top Plates gets into high refresh rate tracking, it cannot do high volume range search at the same time, foregoing long range situational awareness, unless another radar takes over the volume search function. With the Chinese system, the Sea Eagle provides the main volume search function.

If the missiles are turned into ARH, the Orekh illuminators can be eliminated, replaced with smaller high rate datalinks.

Nemo, the principle you describe with Ethernet, or wireless broadband, may be more suited for general purpose datalinks, like Link-16, Russia's Lightbulb or China's HN-900. But for missile purposes there is nothing wrong by being brutally simple. After all its not really hard to give each missile a seperate datalink channel, compared to working out a variant of the Ethernet scheme.

 

[nemo]

Actually, I wouldn't be surprised if this scheme or something similar has already been used for AEGIS -- you need to handle hundreds of missiles in air (for the whole task force) and having hundreds of data channels can prove to be awkward and expensive. Brutal simplicity is fine, but it does not really scale up.

 

[snake65]

Actually, I wouldn't be surprised if this scheme or something similar has already been used for AEGIS -- you need to handle hundreds of missiles in air (for the whole task force) and having hundreds of data channels can prove to be awkward and expensive. Brutal simplicity is fine, but it does not really scale up.

Well, hundreds of missiles even for a task force is a bit steep demand, with every SPY-1 "face" providing midcourse update for 6 missiles. And of course, you are limited by the number of terminal illuminators. Even a "starshell" attack from all directions will not provide "hundreds" of Standard missiles in the air.

 

[nemo]

Well, hundreds of missiles even for a task force is a bit steep demand, with every SPY-1 "face" providing midcourse update for 6 missiles. And of course, you are limited by the number of terminal illuminators. Even a "starshell" attack from all directions will not provide "hundreds" of Standard missiles in the air.

We are only taking about data link part. Actual assigning of missile to director does not have to happen at missile launch -- it can happen on last command/target assignment.

Able to handle at least tens of missile in air was necessary for AEGIS because USSR was capable of massed missile launch of that magnitude.

 

[tphuang]

Some new pictures, but this first one is interesting

Looks like the lid of the VLS is open. From what I can see, that looks like 2 rows of lid open with 4 per row. So, 4 x 8 = 32 cells.

more pictures from HD, the first one

second one

 

[Gollevainen]

that would prove the concensus of 32 missiles of which we have become with our assumptions

 

[kickars]

Finally we've got our proof for the 32 cells. Wonder why they built the whole ship as stealthy as possible first, then just finishing off with some cheap steal tube barriers on each side? It's a bit like put some cheap wood look like dash board panels in a Ferrari.

 

[bd popeye]

Finally we've got our proof for the 32 cells. Wonder why they built the whole ship as stealthy as possible first, then just finishing off with some cheap steal tube barriers on each side? It's a bit like put some cheap wood look like dash board panels in a Ferrari.

Could you plese re-post a picture of what you are refering to? Sounds like some sort of bumper. Many ships use this sort of thing to prevent damage to the hull when tied up in port. They are not generally a permanent part of the hull. I do need a picture to be sure. Thanks!

 

[kickars]

Could you plese re-post a picture of what you are refering to? Sounds like some sort of bumper. Many ships use this sort of thing to prevent damage to the hull when tied up in port. They are not generally a permanent part of the hull. I do need a picture to be sure. Thanks!

Sorry, I was refering to the first picture tphuang posted above (656). Rather than like the original 054 which has an extra surface for the barrier, on 054A they just use some welded steel tube instead.