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Upcoming designs: regarding the Apollo ACM...

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Re: Upcoming designs: regarding the Apollo ACM...
Post by Theemile   » Mon Feb 23, 2015 6:09 pm

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SharkHunter wrote:--snipping--
Weird Harold wrote:Your surmise is wrong. The ACM, among other things, is necessary to combine eight attack missiles into one fire-control link. Without the ACM, one fire-control link is required for each missile, unless the reduced control of rotating control links is acceptable....
I think I'm just in an argumentative mode on this one. If that were true, then an SD(P) could only control as many missiles as an SD, which makes the battle of Elric [where two Medusa(s) were handling the launch and fire control enough to account for missiles the something like 8 SD(s)] impossible, unless you're saying that the SD(p)s have many multiples more in terms of control links.

The reason I think every missile in one pod synchs to the same signal is that we've never read about a pod being aimed at more than one target, which would be possible if the missiles were individually controlled. Contrast that with the simplicity of:

"Every missile in a pod is programmed to receive "your target downrange is "ship x".... Latest ECM pattern is y", Pen-Aid timing Z", you don't need multiple signals for the missiles themselves to know what to do. Each individua missile itself will follow whatever programming bit applies to it's payload.

What you get with the ACM is an AI that is multipliers more capable and powerful even independently of ship control than that in the Mark 23's, and a 64x faster link, so you can provide up to the last second updates for target, ECM, and penetration profiles. It also lets them stay clumped to make the ECM/Penaid and warhead hit likelihood much higher than eight missiles each trying to acquire the same target blindly.

How is that less sensical than individual control?


Only because RFC says it's individual missile control. Apollo was the first firecontrol multiplier.

SD(p)s have more control links than older SDs because they are designed to control more missiles (where as older SDs are designed with enough control links to throw their broadside (20-40 missiles) and still have some redundancy in the event of damage (probably somewhere between 30&150%, depending on the design). So an SD may have 100 control links in a broadside because that's a crazy # for a ship that was designed to only shoot 40 missiles. Before the modern missile pod, massive #s of firecontrol channels were just not needed - in fact wasting space on excess firecontrol just took the place of weapons and defenses in the broadside and hammerheads.

SD(p)s were designed to throw pods after the pods were invented so they have larger firecontrol arrays to control massive waves of missiles pods made possible. The Keyholes are just the continuing evolution to more broadside space being used for firecontrol. The reduction of broadside tubes and energy weapons allowed more space to be dedicated to firecontrol. Look at BoMa, it says that the SD(p)s in home Fleet had the firecontrol for 400 missiles on average, where the SDs had a fraction of that each.
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RFC said "refitting a Beowulfan SD to Manticoran standards would be just as difficult as refitting a standard SLN SD to those standards. In other words, it would be cheaper and faster to build new ships."
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Re: Upcoming designs: regarding the Apollo ACM...
Post by SharkHunter   » Mon Feb 23, 2015 6:12 pm

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--snipping--
Jonathan_S wrote:Your logic makes sense for smarter missiles.

...(Actually a the exception that proves the rule, Theisman basically pulled your trick in Ashes of Victory. He had the forts in Barnett copy the data from one pod's missiles to 6 other pods, to multiply his offensive fire control; but it says at a reduction of accuracy. That implies that normally they do hand-hold each launch, and don't just copy data broadly)
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Note that even when using towed pods the pre-pod designs were limited in the number of missiles they could control (and the limit was way less than 10x the number of broadside tubes; as you might expect under your idea). That seems further evidence that pods don't multiply fire-control. (Even when, as you say, you seem to point multiple entire pods at single targets -- not split fire from one pod against multiple targets)

Bolding mine, yep, I'm still arguing. The PN was copying pod to pod, not missile to missile.

How did 8 battlecruisers plus screen launch and control that many missiles (700 ish?) in the first launch Short Victorious War, or 5 converted haven SD's plus other Grayson ships fire and control fourteen hundred -ish missiles in Flag in Exile. HMMC Wayfarer nailed the Kerebin with something like 250 attack missiles from pods in a stacked salvo in HoE, and that's a converted merchie with a pre-SD bridge/deck. By your logic, those ships should have only been able to control maybe 1/5 to 1/3 of what were launched by those various RMN related ships, yes or no?
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Re: Upcoming designs: regarding the Apollo ACM...
Post by thinkstoomuch   » Mon Feb 23, 2015 6:23 pm

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SharkHunter wrote:Still arguing. Then how did 8 battlecruisers launch and control that many missiles in Short Victorious War, or 5 converted SD's plus other Grayson ships fire and control fourteen hundred missiles in Flag in Exile. HMMC Wayfarer nailed the Kerebin with something like 250 attack missiles from pods in a stacked salvo in HoE, and it's a converted merchie with a pre-SD bridge/deck. By your logic, those ships should have only been able to control maybe 1/5 of what were launched by those various RMN ships, yes or no?


They didn't guide them. Notice anything special about the 2 instances you are citing.

Oh yeah they had no defenses up and running. Second related point the launching ships had been tracking the targets for oh ... hours.

Both factors makes it a different kettle of fish.

Though I will disagree to a certain extent for RMN designs. The SDs at the BoMa were controlling 100 missiles each. So in 1921 Manticore was guiding more like 2.5+ times their broadside launchers.

Now if you wanted to provide better examples there would be Nightgale. Or for a really good explanation of the RFCs fire control thing read ToF Chapter 58.



Have fun,
T2M
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A: “No. That’s just the price. ...
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Re: Upcoming designs: regarding the Apollo ACM...
Post by thinkstoomuch   » Mon Feb 23, 2015 6:31 pm

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Second post because I missed part in the first reply.

SharkHunter wrote:Bolding mine, yep, I'm still arguing. The PN was copying pod to pod, not missile to missile.

How did 8 battlecruisers plus screen launch and control that many missiles (700 ish?) in the first launch Short Victorious War, or 5 converted haven SD's plus other Grayson ships fire and control fourteen hundred -ish missiles in Flag in Exile. HMMC Wayfarer nailed the Kerebin with something like 250 attack missiles from pods in a stacked salvo in HoE, and that's a converted merchie with a pre-SD bridge/deck. By your logic, those ships should have only been able to control maybe 1/5 to 1/3 of what were launched by those various RMN related ships, yes or no?


Some how missed the 4th Yeltzin reference in the original reply.

Their were 19 BCs their in addition to the SDs. If they had 2 times the broadside control channels that would be ~760 missile control channels. How many DDs, CLs, CAs were there to help?

Have fun,
T2M

[Edit] I went and looked it up. They had around 10 CAs probable broadside of 10ish so there are another 200 missiles to control. ~40 CLs so there is another 100 missiles controlled. 16-20 DDs probably another 100. DDs and CLs definitely can control twice there broadside as they spin like Hawkwing did.

Which means the escorts alone could control around 1160ish missiles. If they choose to. If you have a choice between controlling that many Capital missiles and that many smaller missiles that are more or less decoys for the big guys. I know what I would choose.
Last edited by thinkstoomuch on Mon Feb 23, 2015 6:42 pm, edited 1 time in total.
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Q: “How can something be worth more than it costs? Isn’t everything ‘worth’ what it costs?”
A: “No. That’s just the price. ...
Christopher Anvil from Top Line in "War Games"
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Re: Upcoming designs: regarding the Apollo ACM...
Post by Jonathan_S   » Mon Feb 23, 2015 6:41 pm

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thinkstoomuch wrote:
SharkHunter wrote:Still arguing. Then how did 8 battlecruisers launch and control that many missiles in Short Victorious War, or 5 converted SD's plus other Grayson ships fire and control fourteen hundred missiles in Flag in Exile. HMMC Wayfarer nailed the Kerebin with something like 250 attack missiles from pods in a stacked salvo in HoE, and it's a converted merchie with a pre-SD bridge/deck. By your logic, those ships should have only been able to control maybe 1/5 of what were launched by those various RMN ships, yes or no?


They didn't guide them. Notice anything special about the 2 instances you are citing.

Oh yeah they had no defenses up and running. Second related point the launching ships had been tracking the targets for oh ... hours.

Both factors makes it a different kettle of fish.

Though I will disagree to a certain extent for RMN designs. The SDs at the BoMa were controlling 100 missiles each. So in 1921 Manticore was guiding more like 2.5+ times their broadside launchers.

Now if you wanted to provide better examples there would be Nightgale. Or for a really good explanation of the RFCs fire control thing read ToF Chapter 58.



Have fun,
T2M

And Wayfarer was the first designed pod-layer. (And had lots of unused hull surface to mount fire control links). I'm not surprised that they might have given her more fire control than the older pre-pod SDs.

And at Hancock, the division with the highest throw weight was the one with the newest ship; the Reliant-class BC HMS Nike, (22 tube broadside) plus the IIRC Homer-class BC HMS Agamemnon (20 tube broadside). Together they controlled 178 missiles - an average of 89 each; though obviously Nike must have controlled more than the average since the Homer-only divisions couldn't fire as many. But that's roughly a 4.5x ratio of fire-control channels to broadside tubes; large but not necessarily outrageous.
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Re: Upcoming designs: regarding the Apollo ACM...
Post by StealthSeeker   » Mon Feb 23, 2015 8:57 pm

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I did a search for "Mark 23" in the books up to Mission of Honor and the first reference for them was in the book Storm From the Shadows. Chapter 12 has a good in depth discussion on the Apollo MDM missile types. Following are 2 paragraphs from that chapter.

SFTS:Ch12 wrote:"Once we'd taken up ways to deal with that particular objection," Halstead went on, "it became evident that our only choices were to either strip the drive stage out of the birds, as we'd originally planned, or else to add a dedicated missile. One whose sole function would be to provide the FTL link between the firing ship and the attack birds. There were some potential drawbacks to that, but it allowed us not only to retain the full range of the MDM, but actually required very few modifications to the existing Mark 23. And, somewhat to the surprise of several members of our team, using a dedicated control missile actually increased tactical flexibility enormously. It let us put in a significantly more capable—and longer-ranged—transciever, and we were also able to fit in a much more capable data processing and AI node. The Mark 23s are slaved to the control bird—the real 'Apollo' missile—using their standard light-speed systems, reconfigured for maximum bandwidth rather than maximum sensitivity, and the Apollo's internal AI manages its slaved attack birds while simultaneously collecting and analyzing the data from all of their on-board sensors. It transmits the consolidated output from all of its slaved missiles to the firing vessel, which gives the ship's tactical department a real-time, close-up and personal view of the tactical environment.

"It works the same way on the command side, as well. The firing vessel tells the Apollo what to do, based on the sensor data coming in from it, and the on-board AI decides how to tell its Mark 23s how to do it. That's the real reason our effective bandwidth's gone up so significantly; we're not trying to individually micromanage hundreds or even thousands of missiles. Instead, we're relying on a dispersed network of control nodes, each of which is far more capable of thinking for itself than any previous missile has been. In fact, if we lose the FTL link for any reason, the Apollo drops into autonomous mode, based on the prelaunch attack profiles loaded to it and the most recent commands it's received. It's actually capable of generating entirely new targeting and penetration commands on its own. They're not going to be as good as the ones a waller's tac department could generate for it if the link were still up, but we're estimating something like a forty-two percent increase in terminal performance at extreme range as compared to any previous missile or, for that matter, our own Mark 23s with purely sub-light telemetry links, even if the Apollo bird is operating entirely on its own."
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Re: Upcoming designs: regarding the Apollo ACM...
Post by StealthSeeker   » Mon Feb 23, 2015 9:10 pm

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There are 2 things in that snip-et from SFTS:Ch12 that I would like to point out. The first is that it states that the missile launch is controlled by the *firing* ship. The second is that the Mk23 missile's only link to the firing ship is via the MK23-e control missile.
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Re: Upcoming designs: regarding the Apollo ACM...
Post by SharkHunter   » Mon Feb 23, 2015 9:45 pm

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--snipping--
Very cool... here's the important bit:
Storm from the Shadows wrote:...That's the real reason our effective bandwidth's gone up so significantly; we're not trying to individually micromanage hundreds or even thousands of missiles. Instead, we're relying on a dispersed network of control nodes, each of which is far more capable of thinking for itself.
Back to the original premise of this thread though, which I think would likely be supported by our "pissed geek squad" back on Gryphon trying to figure out how to help the RMN "do unto others first" with an ACM variant.

So if even in autonomous mode, what they get what is a 42% better terminal accuracy, PLUS the ability to use the FTL links if there's any KH-II platform in system... It makes sense for EVERY long range missile to be synchable. Let's use the Mark 16 DDMs with rotating links for example. Let's say you can only update them 1/3 of the time, that's still at 22x lightspeed. At the last moment, 1/3 of the missiles are fully controlled, 2/3 are more 42% accurate than they would be otherwise, aka 10 of 28 should hit more easily right?
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Re: Upcoming designs: regarding the Apollo ACM...
Post by StealthSeeker   » Mon Feb 23, 2015 10:40 pm

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I would point out a couple of things. The Mk16 can't keep up in speed or distance with the Mk23-e control missile. Second, the Mk23 missiles that are launched as part of a "pod group" have had their control links modified to work with just the control missile, high bandwidth vs sensitivity. (so says the snip-et)

So standard ship launched Mk16's and standard ship launched Mk23's won't link to the Mk23-e anyway. Vice versa,... pod launched Mk23's that link to Mk23-e control missiles can't communicate with standard ship control links.

Now Mycroft may have both FTL and light speed control links and it could therefore control missiles it launched of either variety.
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Re: Upcoming designs: regarding the Apollo ACM...
Post by Jonathan_S   » Tue Feb 24, 2015 12:05 am

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StealthSeeker wrote:I would point out a couple of things. The Mk16 can't keep up in speed or distance with the Mk23-e control missile. Second, the Mk23 missiles that are launched as part of a "pod group" have had their control links modified to work with just the control missile, high bandwidth vs sensitivity. (so says the snip-et)

So standard ship launched Mk16's and standard ship launched Mk23's won't link to the Mk23-e anyway. Vice versa,... pod launched Mk23's that link to Mk23-e control missiles can't communicate with standard ship control links.

Now Mycroft may have both FTL and light speed control links and it could therefore control missiles it launched of either variety.
I'd nitpick your first point. Mk16s have exactly the same acceleration per drive as the Mk23. So if you wanted to fly them in formation with a Mk23 it would be trivial to do so -- just don't use the 3rd drive on the Mk23.

If it was a unified offensive missile salvo that's a problem because it artificially requires all the Mk23s to accept a lower terminal velocity. But if you're 'just' talking about hypothetically using a 23E to control a bunch of Mk16 (because that's the offensive missile you have on hand?) then the lowered terminal velocity of the 23E is irrelevant since it's the terminal velocity of the 16s that matter; and that's the same whether a 23E is flying behind them or not.

Of course your other point is well taken.
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