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BC(C) (Spoiler Within)

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Re: BC(C) (Spoiler Within)
Post by Jonathan_S   » Thu Sep 01, 2016 11:23 am

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Theemile wrote:The description in the text for the FSV (Fast Support vessel) is a ~3Mton craft with the forward 20% a merchie style ship, with 8 LAC bays and a CL's (perhaps an Avalon - maybe a Kemerling?) offensive and defensive suite, with full offbore firing. The back is a thin spine with several arms, and a warship style rear hammerhead. Several types of modules can mate to the spine of the ship allowing it to be a repair vessel, hospital ship, ammo ship, troopship, or LAC tender as needed - the modules are quadrants, allowing 4 differing modules to be mounted at any time.

Also of note, the arms have external mooring ports for CUMV(L)s (Cargo unmanned vehicle (Large)) which can also carry extra cargo and munitions externally of the main ship as "CARGO RACKS".

The vessels are designed to be a modular support ship which can keep up with and support detached BC squadrons.

It was never noted what the dimensions were or if the rear modules were included in the given mass. So it could be 3 Mtons WITHOUT the modules, but 4-6 with the module attached.

and still FAT for an optimized compensator.

This addresses several items discussed previously - the need for a forward ammo carrier for patrolling forces (to carry and replenish heavy pod loads on patrols), a light escort carrier for Torch with podlaying and troop transport capability for raids, and a self defense ship for fleet trains to relieve DDs and CLs from the job.
Still, the FSVs like the Charles Ward struck me as verging on having TARDIS tech in them - squeezing in even 8 LAC bays on the forward half of 3 MTon ship along with a CL's weapons fit; crew quarters, fusion room(s), etc (since I assume those aren't buried in the 'stick' the modular mission packages attach to).

Not to mention that the 4 Mark-17 CUMV(L)s attached to her external racks each carried "three hundred Mark 23 flatpack missile pods". Ok, a CUMV doesn't have impellers or wedges; on the other hand each carries approximately 83% the pods of a 1.75 mton Agamemnon­-class BC(P)!
The fact that by attaching 4 CUMV(L)s to your FSV means it's hauling around 3.33 times a BC(P)s loadout on a hull that's less than twice as large seems inconceivable.


(And so is the fact that a LAC was able to tow a CUMV(L), however slowely, while hiding under stealth from SLN BCs. IIRC RFC had previously said a LAC would barely be able to tow a couple pods; and that even that would require high wedge power and serious adverse affects on it's stealth. But now it can tow a giant mega-pod of 300 pods without any issues?!?)
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Re: BC(C) (Spoiler Within)
Post by Relax   » Thu Sep 01, 2016 12:30 pm

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Not sure why you have a problem with the numbers. Say what you will about other aspects of his Universe, but his ship designs are always well thought out.

This new ship is essentially nothing but a civilian + hull with military grade propulsion. 3M tons... 3!

A military hull is roughly 30% Propulsion/comp/fusion/hyper, which would leave 2.2 M tons of volume to play with.

Remember his drawing? 15% past the Impeller ends, 15% of hull for each impeller/fusion/hyper/compensator leaving a 40% in the middle.

15%[15%IMP{Central40%}15%IMP]15%

8 LAC's = 30,000 ton + extra ammo and people holders = roughly 300,000-400,000ton

{EDIT: Had this in original, but somehow edited it out... Doh...
15% of 3M tons = 450,000 tons so fitting in 8 LAC's in the Hammerhead is doable. Even have room left over for CM's and PDLC's. }

An Avelon/Kammerling offense/defense suite can't be more than 100,000 tons. I would put it at 50,000 myself.

1 Pod = roughly 1500 tons or less. I go with less myself.
300 = no more than 450,000tons.

4 x CUMV = 1.8Mton

Total 2.2Mtons + Propulsion = 3M tons... DING DING DING
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EDIT: As for LAC towing..... Haven't read it so don't know how fast he had them towing. No reason it shouldn't be stealthy. Would think Stealth would be proportional to how much POWER is being expended. Should be reflected by how many "g's" with an "extra" ~0.5M ton...

20kton @700g = 14E6
14E6/500kton = 28g
Last edited by Relax on Thu Sep 01, 2016 2:29 pm, edited 1 time in total.
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Re: BC(C) (Spoiler Within)
Post by markm57   » Thu Sep 01, 2016 2:11 pm

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Hmm. I see to recall an infodump where runsforcelery said the realistic use for a small clac/esort size one Might be for a commando raid. Sort of lkie with Britains older carriers.
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Re: BC(C) (Spoiler Within)
Post by Duckk   » Thu Sep 01, 2016 2:17 pm

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markm57 wrote:Hmm. I see to recall an infodump where runsforcelery said the realistic use for a small clac/esort size one Might be for a commando raid. Sort of lkie with Britains older carriers.


http://infodump.thefifthimperium.com/en ... ngton/73/1
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Re: BC(C) (Spoiler Within)
Post by phillies   » Thu Sep 01, 2016 2:43 pm

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MaxxQ wrote:Just checked HoS again after a thought. The shortest LACs are 71m long. A Nike is 129m wide. With no armor, that means that a Nike-sized LAC carrier would be 13m too narrow for nose-to-nose LAC parking. You would need to widen a Nike - at a minimum - 50m to accomodate LACs in a similar manner to standard CLACs (that accounts for the extra 13m needed, plus room for armor and accessways between LACs on opposite broadsides from one another). Note that that's just a few meters less than the width of the Flight II Hydra.


Ummh, one line of LAC bays, all exiting on the same side of the ship, with big corridors along the other wall of the ship? And main length of ship corridors on a different deck?
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Re: BC(C) (Spoiler Within)
Post by Jonathan_S   » Thu Sep 01, 2016 2:44 pm

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Relax wrote:Not sure why you have a problem with the numbers. Say what you will about other aspects of his Universe, but his ship designs are always well thought out.

This new ship is essentially nothing but a civilian + hull with military grade propulsion. 3M tons... 3!

A military hull is roughly 30% Propulsion/comp/fusion/hyper, which would leave 2.2 M tons of volume to play with.

Remember his drawing? 15% past the Impeller ends, 15% of hull for each impeller/fusion/hyper/compensator leaving a 40% in the middle.

15%[15%IMP{Central40%}15%IMP]15%

8 LAC's = 30,000 ton + extra ammo and people holders = roughly 300,000-400,000ton

An Avelon/Kammerling offense/defense suite can't be more than 100,000 tons. I would put it at 50,000 myself.

1 Pod = roughly 1500 tons or less. I go with less myself.
300 = no more than 450,000tons.

4 x CUMV = 1.8Mton

Total 2.2Mtons + Propulsion = 3M tons... DING DING DING

For the LAC bays it's more a size / placement issue than a tonnage one. Even a 3 Mton hull should be roughly 150m wide and 140m tall. A LAC (ignoring the volume of it's bay, docking arms, maintenance access, ammo and thruster fuel feed tubes, etc) is 72 m long, 20m wide 20m tall.

Eith only almost 40 meters less beam than a CLAC I don't see any way you're putting 2 bays in nose to nose from opposide broadsides. Technically the LACs could fit that way, but only if the doors behind them, and everything between the LACs, came to a combined total of no more than 6 meters :D.

So we're looking, possibly at asymmetric placements with all of them in in broadside (or less likely a staggered arrangement); or more likely they dock facing parrallel to the ship, so the hangers only need 30ish meters of depth.


Now once you figure in the curve of the hull I'm guessing you've got closer to, at most, only 92 m of near vertical broadside to play with - so you're more likely only able to stack the LAC bays 2 high. Ok, you can probably fit them in, 4 in each broadside in a 2x2 longways arrangement. That'll run the bays back at least 150 meters along your flanks (I'd guess more like 164m, but maybe that's not insurmountable.

Let's see, assume that the FSV is about 1,074 meters long; we instantly lose at least half of that for the aft modules; so 537m left to cram everything in. 150-164m doesn't seem like too much of that. But don't forget the tapers; we can't put the LAC bays there; nor the hammerhead. Heck looking at the drawings and renders you don't seem to even mount weapons out in the hull taper area. Trying to take measurements off of the HoS lineart (always a risky proposition) it appears a hammerhead + impeller rings make up about 12% of a ship's lenght, and the tapers make up another 21%. So the available broadside length of that generous seeming 537m is made up of: 129m of hammerhead + impeller, 230m of hull taper, and only 178m of full height broadside. The 2x2 LAC bays are now a very tight squeeze.

And somehow around it you've got to fit in a CL's armorment. (Though maybe you cheat a little and pull all the offensive tubes, Roland-like, as forward chasers)
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Re: BC(C) (Spoiler Within)
Post by Rincewind   » Thu Sep 01, 2016 5:12 pm

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MaxxQ wrote:Just checked HoS again after a thought. The shortest LACs are 71m long. A Nike is 129m wide. With no armor, that means that a Nike-sized LAC carrier would be 13m too narrow for nose-to-nose LAC parking. You would need to widen a Nike - at a minimum - 50m to accomodate LACs in a similar manner to standard CLACs (that accounts for the extra 13m needed, plus room for armor and accessways between LACs on opposite broadsides from one another). Note that that's just a few meters less than the width of the Flight II Hydra.


But why put the launch bays transversely? Why not put them in longitudinally? Granted, this would take up a lot more of the hull length but you would be able to mount some on either side of the main hull. Also, you were referring to a Nike sized CLAC. Having looked at the specs again in House of Steel the mid hull section is proportionally shorter, about 33% of the total length, compared to other battlecruisers where the mid hull section is longer; (about 40% for a Flight I Reliant & 42% for an Agamemnon). As we are talking about a Nike sized hull then increasing the mid hull length & shortening the tapers would give us more room to mount LAC bays.

Assuming a hanger bay 80m x 24m x24m & a mid hull section lengthened to about 45% of overall length & hull depths & widths being approximately the same you could mount two rows of 5 bays & 1 interrupted row with two 2 bays for a total of 14 bays per side. Furthermore, with the bays mounted longitudinally you could still have sufficient hull depth to have two LACS per bay & have a core hull. Granted they would not be as efficient as having one LAC per bay in a regular CLAC; (you could only launch half the LAC Group simultaneously & they would be more vulnerable), but it would still allow you to carry a worthwhile number of LACS 56 on a much smaller hull.

To cite some real world examples compare the new Gerald Ford CVN compared to our Queen Elizabeth CVF. As an aircraft carrier, purely in terms of aircraft carried the Gerald Ford is clearly superior . . . but it also far more expensive, has a crew over two & a half times as large as the Queen Elizabeth & it can't fit into any of the UK's ports anyway. Another example would be LPD's with the US Navy's America class at one end of the scale & the Italian Navy's San Giorgio class at the other with the Spanish Juan Carlos I & the French Mistral class somewhere in the middle. Each one is a compromise between what would be most effective & what they can reasonably afford to build, man & operate.
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Re: BC(C) (Spoiler Within)
Post by munroburton   » Thu Sep 01, 2016 5:44 pm

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The FSV might dock LACs in a similar fashion to Keyholes. After all, the cargo modules are ugly stick-outy bits, why not the LACs too?

Requires considerably less internal volume to carry those LACs, if at the expense of having fully sealed bays for the techs to work in. But what the heck - the FSV's designed to work with other starships which it can't possibly enclose anyway.
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Re: BC(C) (Spoiler Within)
Post by MaxxQ   » Thu Sep 01, 2016 7:43 pm

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Rincewind wrote:
MaxxQ wrote:Just checked HoS again after a thought. The shortest LACs are 71m long. A Nike is 129m wide. With no armor, that means that a Nike-sized LAC carrier would be 13m too narrow for nose-to-nose LAC parking. You would need to widen a Nike - at a minimum - 50m to accomodate LACs in a similar manner to standard CLACs (that accounts for the extra 13m needed, plus room for armor and accessways between LACs on opposite broadsides from one another). Note that that's just a few meters less than the width of the Flight II Hydra.


But why put the launch bays transversely? Why not put them in longitudinally? Granted, this would take up a lot more of the hull length but you would be able to mount some on either side of the main hull. Also, you were referring to a Nike sized CLAC. Having looked at the specs again in House of Steel the mid hull section is proportionally shorter, about 33% of the total length, compared to other battlecruisers where the mid hull section is longer; (about 40% for a Flight I Reliant & 42% for an Agamemnon). As we are talking about a Nike sized hull then increasing the mid hull length & shortening the tapers would give us more room to mount LAC bays.


You could mount them logitudinally, sure. But so far, there's no indication the RMN (or the RHN, for that matter) wants to. Even the Wayfarer launched LACs perpendicular to her long axis.

Also, I think you're looking at things backwards with regards to the battlecruisers (BTW, I keep referring to the Nike, because the OP said a Nike-sized carrier) and their mid-hull lengths - the Nike's mid-hull isn't short relative to the others. The Aggie's mid-hull is longer than normal (actually, pretty darn close to exactly the same length as the Nike mid-hull), to accomodate the pod bay as well as broadside weapons:

http://maxxqbunine.deviantart.com/art/B ... -485504728

Either way, I see no problem with extending the mid-hull and shortening the tapers, unless there's a good reason that I don't know about for it to NOT be done.

Rincewind wrote:Assuming a hanger bay 80m x 24m x24m & a mid hull section lengthened to about 45% of overall length & hull depths & widths being approximately the same you could mount two rows of 5 bays & 1 interrupted row with two 2 bays for a total of 14 bays per side. Furthermore, with the bays mounted longitudinally you could still have sufficient hull depth to have two LACS per bay & have a core hull. Granted they would not be as efficient as having one LAC per bay in a regular CLAC; (you could only launch half the LAC Group simultaneously & they would be more vulnerable), but it would still allow you to carry a worthwhile number of LACS 56 on a much smaller hull.


Where are you planning to fit the missile loading equipment for the LACs?

You've left 9 meters between nose and tail of lined up LACs. Trust me when I say that 9 meters is NOT enough room, especially when you will also need to add access corridors and cofferdamming between them. Or do you plan to have it as one long bay, not separated by any sort of armor?

Never mind where the reloads and associated magazines are going to fit

Where's the hull armor going to go (based on your assumption that you could fit two LACs per bay)?

Just going by your 80x24x24 dimensions, that works out to 96 meters, leaving just 33 meters to accomodate the core hull (as you mentioned) and the armor. Considering the armor on a Nike is no less than 10 meters thick, that leaves 13 meters for a core hull, which, BTW is ALSO armored. Let's be conservative and say the core hull armor is only 2 meters thick (most likely thicker, but we haven't gotten that far yet), which leaves us with a core hull interior width of only 9 meters at its widest point - at the centerline. That's only for your centerline placed LAC bays - it'll be even less for the upper and lower lines of bays, since, you know, the hull is curved and gets narrower the farther up or down you go.

Of course, if you're only talking a single LAC per bay, then sure, you could do that. But then you don't get the numbers - 28 as opposed to 56.

Did you account for the fact that the width of a LAC DOES NOT include the gravitic array blades?

Counting the blades, a LAC is more like 25-26 meters wide. Plug those numbers into the above bit about how much room is available and do the math.

IOW, you will STILL need to widen a Nike-based or -sized BC to accomodate LACs in sufficient numbers to make something like that worthwhile.

Rant begins:

<sigh> This is the sort of thing that I have to deal with when someone brings up a "brilliant" way to stuff more crap into a given hull: they all look at the external dimensions, and NEVER take into account armor thickness, or where all the ancillary support equipment is going to fit. I don't resent it, but it does tend to get repetitive after the seventh or eighth time of reminding someone. Sometimes I wish some of you knew 3D modeling and could build a mesh that would accomodate everything you want, but also include all the necessary armor and such that is REQUIRED for warships.

This is Skimper's biggest problem - he sees the size of the weapons ports compared to the size of the rest of the hull, and assumes that that's the size of lasers, grasers, missile tubes, and defense clusters. He doesn't even realize (or just outright dismisses it as unimportant) that what's behind the weapons port is about three times as big, and a hell of a lot longer, and THAT doesn't even include magazines for the attack missiles or CMs. I spent a week remodeling (over and over again) a cross section of the Star Knight, trying to get the required hull armor thickness, the armored core hull, and the missile tubes and magazines to fit without having to cut notches out of something (outer hull armor, core hull, etc.).

/rant

Edited for a stupid 1 meter difference error on my part. Math is hard :mrgreen:
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Re: BC(C) (Spoiler Within)
Post by Somtaaw   » Thu Sep 01, 2016 9:08 pm

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MaxxQ wrote:
Rant begins:

<sigh> This is the sort of thing that I have to deal with when someone brings up a "brilliant" way to stuff more crap into a given hull: they all look at the external dimensions, and NEVER take into account armor thickness, or where all the ancillary support equipment is going to fit. I don't resent it, but it does tend to get repetitive after the seventh or eighth time of reminding someone. Sometimes I wish some of you knew 3D modeling and could build a mesh that would accomodate everything you want, but also include all the necessary armor and such that is REQUIRED for warships.

This is Skimper's biggest problem - he sees the size of the weapons ports compared to the size of the rest of the hull, and assumes that that's the size of lasers, grasers, missile tubes, and defense clusters. He doesn't even realize (or just outright dismisses it as unimportant) that what's behind the weapons port is about three times as big, and a hell of a lot longer, and THAT doesn't even include magazines for the attack missiles or CMs. I spent a week remodeling (over and over again) a cross section of the Star Knight, trying to get the required hull armor thickness, the armored core hull, and the missile tubes and magazines to fit without having to cut notches out of something (outer hull armor, core hull, etc.).

/rant



Would you be willing to make mesh model overlays available, if some of us were willing to attempt to start learning 3D modelling?

Armor thickness for the various classes, and perhaps the rough frame to symbolize the dimensional space occupied by weapons, LAC launch bays and the like? Doesn't have to be as perfect as yours, but something that let's us toy around with some of these concepts a bit better.
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