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Re: Git your pencils out and design me a ship! | |
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by Somtaaw » Wed Aug 17, 2016 8:29 am | |
Somtaaw
Posts: 1204
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Jonathan_S, found a couple snippets for you, for that notional Keyhole light of yours.
Ships as early as Honor of the Queen were rolling ship to present the belly (or roof) of their wedges to single sources of fire, in close to one vs one battles. -Madrigal vs Thunder and Principality (the ambush of Grayson forces) -Fearless vs Thunder (when Honor went on that final joyride where she planned to roll back down to engage with beams at under 50,000 km. -McKeon rolled Prince Adrian to present the belly during the ambush that led to the capture and Hades adventure. That's as far into my latest re-read I've gotten, looking for good bits of data relevant to threads. I can actually post the quotes if desired, but those are all very clear battles where the defender put their wedge in the way and tracked incoming missiles through their wedge. Which actually makes the defensive points of Keyhole rather odd, it's loaded with fire control and active missile defenses but it seems to be mostly for offensive fire control rather than any real defensive need. Which means even that notional 300 kton cruiser wouldn't really need a Keyhole-Lite because defensively it doesn't need it, and offensively it's not supposed to have the mentality it can go fight a waller in a fair fight. |
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Re: Git your pencils out and design me a ship! | |
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by Jonathan_S » Thu Aug 18, 2016 2:56 pm | |
Jonathan_S
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I know you can track missiles through your wedge; I didn't mean to say you couldn't. In fact HotQ explicitly says "We should be able to run a fair plot on Saladin with our belly radar, Rafe, but tracking missiles through the grav band will be difficult" The real question is whether it is as good as a Keyhole? * Principality vs Troubadour. Energy range fight, except Principality has to use missiles due to her deficiency in energy mounts. Troubadour was snapping down to use her lasers, then rolling back to make a harder missile target. It appears she was restricted to using PDLCs to pick of missiles "popped up, fighting for a look-down shot through Troubadour’s upper sidewall". * Fearless vs Thunder of God. Can't see missiles through the wedge beyond 500,000 km -- too close to use CMs. * Prince Adrian vs Katana -- rolled belly against Katana yet defended with CMs. (Though I think McKeon made a minor tactical error here) So yes, you can track missiles through your wedge but not as clearly, or as far out, as you can through a broadside. So a Keyhole still gives you a defensive advantage. Also we're told that you can't maintain a fire-control link through a wedge - so the CMs you launch while rolled seem like they'd be flying autonomous for the majority of their flight; which has to hurt their hit percentages. (There's where I think McKeon made a mistake. He should have held Prince Adrian broadside on for as long as possible to maximize her CM hit percentages against the pod based missiles - especially with the early CM launches that are attempting max range intercepts. She should still have time to roll away in the ~20 seconds it'll take the attacking missiles can cover the 147k km from extreme CM range to laserhead standoff range. Also when rolled behind your wedge your PDLCs can't fire until the attacking missile pops over the 'horizon' of your wedge. And it'll do so within it's own standoff range - so the PDLC lacks it's normal range advantage. That means everything comes down to whether the PDLC can refine an accurate firing solution from the fuzzy position the through-wedge tracking handed off before the laserhead spots the ship, performs final alignment of its lasing rods and detonates. Even a defensive-only keyhole seems to provide 3 advantages over simply rolling your ship (though obviously these have to be weighed against the trade-offs it takes to carry such a beast). 1. Longer ranged and more accurate tracking of inbound missiles than is possible through a wedge. 2. It allows CM fire control links to be maintained even while rolled - especially useful given the significantly increased range RMN CMs recently acquired (3 million km vs 1.5) 3. It carries a PDLC or two that can be used to pick off additional missiles before they clear the horizon of the wedge. I don't know that this adds up to enough benifit to justify installing them now; but I still see reasons why RFC said Hemphill was "tinkering around with a considerably smaller, simpler platform whose primary function would be missile defense and which could probably be fitted to smaller combatants." They may not be worth it, yet, but there's some benefits to them. |
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Re: Git your pencils out and design me a ship! | |
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by Somtaaw » Thu Aug 18, 2016 3:40 pm | |
Somtaaw
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That was a different battle, the one I was referring to, was the original ambush that lead to the deaths of Admirals Yanakov and Courvosier. Courvosier was aboard the Madrigal, and was using her sensors to help the Grayson force intercept the Masadan raiding fleet.
Prior to the return of pod combat, it does appear that rolling ship was better. There's a few occasions (which I don't currently have quotes for), where ships chose to continue combat with chaser only armaments rather than presenting broadsides and "giving the enemy a better angle" or something like that. You may have sacrificed the pinpoint accuracy that Manticore prizes so, but you gained more than you lost. Rolling ship too late, such as after you've launched a few salvo's of counter missiles reduces your ability to move from "last known position relative to wedge" to almost non-existant. You would be able to displace at most a few meters, which is probably not enough to throw off shots compared to forcing even SDM missiles to come streaking in totally blind, and having to react to ship position in seconds. Which means the PDLC's have that slight edge that even a fuzzy idea of where the missile should be is better than zero idea where the ship is. But that's all pre-pod combat, with pod missile saturation the defense side literally cannot afford to sacrifice those extra launches to keep the incoming missiles blind. if a stripped down Keyhole can take the place of the older decoys, even the light cruiser Fearless carried six 50-ton decoys. So it's possible if you exchanged 100% of tethered decoys, and relying purely on the shuttle bay (or tube) launched Ghost Rider derived decoys, you could squeeze a 150-200t "Keyhole-Lite" onto each broadside of the 88 kton CL Fearless and you wouldn't have changed the ship much. Now obviously due to ship size creep, something as old as a Courageous class at 88 ktons compared to the more modern 276 kton Kamerlings, means equal decoy enlargement means you could be dropping anywhere upto 450 tons per broadside for a Keyhole-Lite without even touching your offensive broadsides. From the pearls,
So as long as these notional Keyhole-Lite are purely countermissile fire control, and maybe a Ghost Rider drone style fusion plant, and maybe even reduce the limited active defenses of a Keyhole-I, you could reduce a Keyhole II's tonnage down from 20 ktons down to perhaps 2 or 3 ktons. A Ghost Rider spy drone alone is about 100 tons, evidence from Shadows of Saganami when one was handlaunched in Monica. The extra fire control, more sensors, and maybe some EW emitters would increase that, and increase fusion plant size a little to keep it all powered. That wouldn't require much butchering of even existing ship broadsides for a defensive Lite Keyhole... however, as I observed above, to get the Keyhole-Lite, you'd have to completely eliminate the traditional broadside tethered decoys and shift entirely to deployed drones. All ships carried those, and once the RMN got Ghost Rider, even before they developed Lorelei they had free-flying GR decoys flitting about. |
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Re: Git your pencils out and design me a ship! | |
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by Relax » Thu Aug 18, 2016 6:21 pm | |
Relax
Posts: 3214
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Keyholes are not 20ktons. They are 120,000+++ according to RFC.
Why? Because of the SAG-C/BCL debate where RFC essentially agreed, without saying he agreed, that a SAG-C @480,000 tons and all of its sunk cost makes much more sense to increase it to ~~~500,000 tons with far better defenses due to the rolled wedge alone. To make the BCL relevant, RFC increased the Keyhole mass by a factor of ~~5, effectively making a keyhole 'lite' impossible from a dedicated platform perspective. Light ships have Hermes buoys that can send video and voice, via FTL and EMS, but can't send data to a missile... Oh wait, they can as was done in BOMA... Same goes for RD's. The only "problem" is the software protocol handling with tracking. _________
Tally Ho! Relax |
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Re: Git your pencils out and design me a ship! | |
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by Somtaaw » Thu Aug 18, 2016 6:42 pm | |
Somtaaw
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Child, you need to learn to read before jumping on your high horse, closing your knight visor and charging down the idiots with your righteous intelligence. Maybe next time you could actually read the actual post, maybe even twice to be sure you actually address what's being discussed... Namely, Jonathon and myself have been going back and forth for a few pages now, over the notional stripped-down Keyhole-Lite that even RFC has stated here and I quote
Bolded, and size enhanced the emphasis, because you clearly have reading problems, and need things to be pointed out to you in great big letters sir. And for the size, do you have a specific source on Keyhole's specifically NOT being 20 ktons? Because from the pearls, Keyhole II are around the size of a LAC. LACs, even Shrikes are upto around 20 ktons, ergo Keyhole II is 20ktons. |
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Re: Git your pencils out and design me a ship! | |
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by Jonathan_S » Thu Aug 18, 2016 11:00 pm | |
Jonathan_S
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I don't know about 120,000 ktons. But the infodump The nature of Manticore's battlecruisers says, in part, While the final (or, at least, currently final) generation of Keyhole-One is somewhere around 65,000 tons (or darned near the size of a prewar destroyer), Keyhole-Two is even larger.. It was the original original design for the Keyhole I platform that was "about the size of a LAC" which was "more fully developed" into the 65 kton version before being deployed on Nikes. (It's unclear if that original original Keyhole I ever went into deployment on the Invicutus class or if it was a testbed only that gained it's bells and whistles (and tonnage) before active deployment.) So Relax is correct to point out that the Keyholes we know aren't 20 ktons. Personally I doubt you could get even a defense-only design, that was effective, down to 2 -3 ktons. I think you'd be doing very well to trim it back to even 40% of the original 20k proposal - which would still put it closer 8-9 ktons. |
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Re: Git your pencils out and design me a ship! | |
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by Vince » Thu Aug 18, 2016 11:05 pm | |
Vince
Posts: 1574
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For the size of various Keyholes, from the Pearls: Boldface and underlined text is my emphasis. -------------------------------------------------------------
History does not repeat itself so much as it echoes. |
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Re: Git your pencils out and design me a ship! | |
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by Relax » Fri Aug 19, 2016 1:39 am | |
Relax
Posts: 3214
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Add in a LAC can be anywhere in AAC of 20kton(RMN) and +30kton(RHN). RFC said larger. Then add in the above. Ended up at 65,000 + internal. Call it 70,000tons minimum. KHII is substantially larger ~120,000+ Apollo missile is "larger" call it roughly 150ton? Half is FTL? If a lowly SAG-C has 128 control channels, a BCL must have ~200 then a SDP must have at minimum 400 and I would lean towards 800. So, 400 is 30,000 tons and 800 FTL transceivers would be 60,000tons on the upper end IMO. you have 800 of these transceivers on a KHII... that is roughly ~120,000tons Neighhh. High horse ridden hard. _________
Tally Ho! Relax |
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Re: Git your pencils out and design me a ship! | |
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by Somtaaw » Fri Aug 19, 2016 8:18 am | |
Somtaaw
Posts: 1204
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Thank you Jon, when I looked on Pearls for Keyhole, I only popped up with 3 links containing the word, and not one of them placed the tonnage at 120 ktons. And one normally wouldn't search "battlecruiser" when one is looking for Keyhole information, which would explain why I could not find the information Relax jumped hard on. Although, Relax.... if you chilled the hell out, and stopped knee-jerk telling everyone how dumb we are, I might have been more inclined to reasonably discuss with you. But your record isn't all that great for reasoned debate and discussion, so anything you say I require actual linked sources, before I take a word you say as "this is how it is", I'm sorry but that's just how I see you. So, the notional possible Keyhole defensive, going into that below 65 kton, original Keyhole specifically for lighter than battlecruisers... nope can't see even Hemphill really pulling that miniaturization off for at least four or five years. Not while Keyhole got size jumped from the original 20 ktons to a 65 kton beast and Keyhole II's having spiked to over 120. The minimum it has to carry to be of use to smaller ships, is sensors & dedicated CM fire control, defensive jammers, and internal power so battle damage can't knock out it's beamed power source. You could strip out the inbuilt Keyhole's Ghost Rider derived impeller drive, the buckler, the PDLC's and other defense features of Keyhole II's, and all fire control for offensive fire (if there's actually a difference between shipkiller and CM fire control links). the power source alone has to be at least as good as a Ghost Rider drone, the jammer's going to larger and more robust than those mounted on Dazzlers, and we can't really ballpark how big and massy the fire control would be, so it'd have to be minimum the size of an all-up pinnace. |
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Re: Git your pencils out and design me a ship! | |
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by George J. Smith » Fri Aug 19, 2016 8:51 am | |
George J. Smith
Posts: 873
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Design is one thing, building is another.
How long is it going to be before Manticore can upgrade the Haven Bolthole yards to turn out Manticore tech, and then start thinking in terms of what size Keyhole I/II & Light will be. IIRC Haven has not yet been able to match the miniaturisation required to produce the presnt Manticoran tech, never mind any future miniaturisation that was in the design pipeline. .
T&R GJS A man should live forever, or die in the attempt Spider Robinson Callahan's Crosstime Saloon (1977) A voice is heard in Ramah |
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