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In order to launch its landing craft the ship must flood down aft by gradually flooding the well deck, at which time the craft contained therein become neutrally buoyant and can float out the open gate of the well.
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When launching its craft, the ship will appear down by the stern, which is why the concentration of the mass forward in your design (all the guns and ammunition, etc.) concerns me.
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Also, understand that the ship will not be under way for this evolution; that would be asking for trouble.
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Interesting design. Nothing I find fault with immediately. However, a sextuple 40mm AA? Is this more of a British-style Chicago Piano?
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I’ve put a drawing of the USS Ashland class LSD above to illustrate my comments.
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The weight of water you have simmed as fuel would be carried in the ballast tanks and would be pumped into the well deck before the well deck gate would be opened.
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My concern with the mass forward is that the barbettes and magazines will eat up space at a prohibitive rate.
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You have two quad 15cm turrets and their barbettes, and the two 75mm mounts, with their hoists, forward of the superstructure. I am also concerned with the space taken up by the hoists for the 75mm mounts on the ship’s side; in the areas taken up by the docking well the hull has but little more than three meters on each beam to stuff the guns, the machinery, the shaft tunnels, crew space, troop space, and everything else.
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I have concerns with the machinery layout. Four shafts may be usable on a cruiser but the docking well will interfere with the shaft tunnels.
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It will also eat up a lot of space for your boilers and turbines. Historically, LSDs of the period were either powered by diesels or by Skinner Uniflow engines which took up much less space.
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Tactically, I have grave concerns with the entire premise of the vessel. It is too fast, in my humble opinion, at that is achieved at great cost.
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If its principal purpose is to transport and land troops, any fire support will be provided by escorting warships.
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As I mentioned, during the deployment of the ship’s craft, the ship will not be under way (free surface effect at speed would be very bad); that makes it a sitting target if the defenders have any significant weaponry at their disposal.
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I think Walter must be using some kind of mind-reading technology because at the weekend I decided to replace the twin 57mm with the OTL sextuple 40mm mount (albeit with my WW 40mm L/70 2pdr gun) one new ships from 1947 onwards!
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Water = construction cost freebies, beyond that it matters little to me.
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The CA/LSD hybrid is crazy, but then I'm sure there are weirder concepts out there.
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Water = construction cost freebies, beyond that it matters little to me.
Don't get that one... Are you telling me that I am doing something that would make this ship a no-cost ship? Cause as far as I can see it would have to be paid for as a military ship (it is not going to be a conversion of a merchant ship) and it needs to be paid for 100%.
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Interesting discussion regarding LSDs, I always assumed the water was pumped and out, but I guess some must be used for ballasting and trim.
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I must point out that very few of the "Landing Ship Dock" designs in Wesworld are remotely comparable to historical dock landing ships. I'm pretty sure I was one of the first to built some of these ships, and I didn't find any data on the length of the well deck; and thus I SWAG'ed it, and it seems most of the designers in the sim followed my lead, apparently under the impression that I knew what I was doing. This is why the Chateaurenault and the Glen class ships have ~25-35% of their length as well decks. This would actually make them Landing Ship Assaults rather than Landing Ship Docks (according to the US definition of terms).
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Way back when we set the rules for LSDs, we determined on two ways to sim well decks.
One way is to sim the weight of water as miscellaneous weight (at 1t per 1.0 m^3). If that is the case, the miscellaneous weight for the water in the well deck may be subtracted from the light displacement.
The second way to sim it, which is what most of us now use, is to sim the weight of water in the well deck as extra range / fuel. That method subtracts it from the light displacement automatically (and it doesn't bork up things like metacentric and stability / steadiness so badly) and so no changes are necessary.
It looks like you simmed it as fuel, so you don't have any changes that need to be made. If you'd simmed the water in the well deck using miscellaneous weight, then you'd need to take a further step.
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The design is amusing.
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This would actually make them Landing Ship Assaults rather than Landing Ship Docks (according to the US definition of terms).
I think the keywords here are "according to the US definition of terms". Who says that Wesworld France uses or must use the same definitions? :)
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It looks like you simmed it as fuel, so you don't have any changes that need to be made. If you'd simmed the water in the well deck using miscellaneous weight, then you'd need to take a further step.
Well, I have been looking at past stuff and it mentions "LST Rule" where you said "Subtract half the miscellaneous weight from the light displacement when calculating cost", not subtracting "miscellaneous weight for the water in the well deck".
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But what I'm trying to point out is that many of the Wesworld ships labeled in the encyclopedia as "Landing Ship Docks" are not actually LSDs, but LPDs (Landing Platform Docks).
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I think you've confused the LST rule, where you can subtract half the miscellaneous weight, with the LSD rule, where you can subtract the weight of the water in the well deck.
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Something that just popped into my mind while watching that picture of the USS Ashland again. Seeing how high the stern gate is compared to the waterline, when opening the gate there would be no way to keep the well deck flooded if there actually was water in the ballast tanks. So that tells me that the water has to be pumped into the ship from the outside prior to being able to flood the well deck.
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But what I'm trying to point out is that many of the Wesworld ships labeled in the encyclopedia as "Landing Ship Docks" are not actually LSDs, but LPDs (Landing Platform Docks).
But that is only valid if you use the US definition of terms. I'm Dutch so I will consider "Landing Ship Docks" to be correct. :P
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I think you've confused the LST rule, where you can subtract half the miscellaneous weight, with the LSD rule, where you can subtract the weight of the water in the well deck.
Well, when I was looking for amphibious ships, the LST rule is the only one I could find. I could not find any rules when it comes to LSDs.
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The gate of the docking well is first lowered, then water is pumped through the ballast tanks to the docking well itself so that the ship can flood down in a controlled manner.
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I say tomato, you say tomaat...
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Yeah. I suppose I just need to make a rules folder post talking about all these exceptions for specialized amphibious stuff, since nobody ever filed them appropriately when the discussions were finished. Grrr...
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