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Pondering starship evolution

Count for what?

This isn’t publication RAW stuff. He lists it as his own take, those that might be interested can pay attention and duct tape it in their way, those that don’t want to don’t have to.
I didn't realise I had posted that. I had a longer reply but didn't bother posting it, as there is little point to discussion, I must have posted that single sentence and then edited and forgot to delete the original, well hey ho.

Aramis pointed out that there was an error in his thesis and I found more evidence in canon.

Are those 6t and 8t fighters any good? In a LBB:2 universe any fighter that can launch missiles at you is a threat. In a HG universe they are utterly pointless as anything other than holding the line for one turn while the ship makes its escape, and they are not even much use for that.

Can I build a more capable fighter, yes. Do I need to use house rules to do it? No.

Can anyone build anything using their house rules, yes.

But canon should be discussed with canon.
 
I didn't realize I had posted that.
QYzFR3h.gif

there is little point to discussion
Depends on what you have to say.
Insightful discussion is always welcome.
Aramis pointed out that there was an error in his thesis and I found more evidence in canon.
Do I need to apologize for not spending HOURS and HOURS and HOURS scouring every page of CT source that included an exception to satisfy both you and aramis?

I already said there were exceptions. I even cited one.
But they are few and far between. The "exceptions to the pattern" are the overwhelming superminority of available cases.
The TREND LINE was plenty clear ... even if there are the occasional outliers from it.
Are those 6t and 8t fighters any good? In a LBB:2 universe any fighter that can launch missiles at you is a threat. In a HG universe they are utterly pointless as anything other than holding the line for one turn while the ship makes its escape, and they are not even much use for that.
Ah ... but CAN they launch missiles in an LBB2 universe? :unsure:
Well, they can ... but it's going to cost extra. 💸

Why?
LBB2.81 computer programming rules (LBB2.81, p38-41).

In LBB2 combat, in order to launch missiles you need the Target program (1 space, MCr1) and the Launch program (1 space, MCr2).
A model/1 computer has CPU 2/4 Storage spaces in it for programs ... and the basic software package can only pay for MCr1 worth of programs.
You still need to buy the Maneuver program (1 space, MCr0.1) to be able to use the maneuver drive.
In other words, a model/1 computer can barely keep up with the amount of programs it would need to run in combat, just in order to be able to attack (let alone defend itself).

As a Referee, I would argue that "buying in bulk" would mean that you can afford all of the necessary computer programs if you buy enough fighters. So MCr3.1 of programs can be purchased if you buy 4x Fighters (for example), which gives you a budget of MCr1+1+1+1=4 to buy the basic software package programming without needing to pay extra (you just copy the programs you buy to each fighter).

Note that the same principles apply to J1 Free Traders and J2 Scout/Couriers as well. It's part of the reason why so many LBB2.81 starship designs are unarmed at construction (they have hardpoints installed and fire control tonnage reserved, but no turrets or weaponry installed). That's because under LBB2.81 computer program rules, a mint condition "fresh off the line" starship with a model/1 (or 1bis) computer couldn't afford any combat related computer programs, since they only had MCr1 to spend on the Standard Software Package (LBB2.81, p41) that came with the construction cost of the computer ... and you needed that starting MCr1 to pay for things like the Maneuver, Jump-1 and Navigation programs, at which point you only had MCr0.4 remaining to buy software with, which wasn't enough for ANY combat programming (offensive or defensive).

If you're talking LBB2 combat with programming rules, you don't really have a "out of the box combatant" using the Standard Software Package until you're installing a model/4 computer (to give you a MCr4 budget to buy starting software with).



As for LBB5.80 combat ... in terms of ship-to-ship space navy warfare, the 6 and 8 ton fighters are "barely useful" as screening assets. At best, they're simply sacrificial speed bumps.

However, when used asymmetrically against targets in a permissive environment (unarmed merchants, infantry/armor formations that lack adequate defensive countermeasures, etc.) those missile armed fighters can deliver significant fire support to allied forces. So when they have "no counter" they can be useful ... but when they do have opposition capable of countering them, they're pretty darn useless in a combatant role (the term "cannon fodder" comes to mind). 💥
Do I need to use house rules to do it? No.

Can anyone build anything using their house rules, yes.
LBB1.77, p20
Skills and the Referee: It is impossible for any table of information to cover all aspects of every potential situation, and the above listing is by no means complete in its coverage of the effects of skills. This is where the referee becomes an important part of the game process. The above listing of skills and game effects must necessarily be taken as a guide, and followed, altered, or ignored as the actual situation dictates.

This passage in RAW is often times held up (when convenient :sneaky:) as the gold standard for how "binding" RAW should be viewed by the Traveller community.

The same people who laud the foresight of the above passage then forget about it (when convenient :cautious:) when they want RAW to be a rigid straightjacket binding everything in perpetuity (mistakes, errata and all) in some sort of pursuit of fundamentalism as an exercise in purity and virtue signaling.

So forgive me if I take what was written (in RAW) from LBB1.77, p20 and edit it slightly to apply to LBB2.81 starship design.
I'll even use bold text to highlight the changes I'm making to redirect the context while remaining true to the spirit so as to apply the notion more broadly.
It is impossible for any table of information to cover all aspects of every potential situation, and the above listing is by no means complete in its coverage of drive performances at different tonnages. This is where the referee becomes an important part of the game process. The above listing of drive performance yields must necessarily be taken as a guide, and followed, altered, or ignored as the actual situation dictates.
Point being there are two choices.
Either LBB1-3 was a stepping stone to something greater than what could be fit within the page count available at the time of publication ... or it's all there ever was or could ever be.

Choose wisely. :unsure:
But canon should be discussed with canon.
There are over 460 posts in this thread by now.
I leave it as an exercise for the disinterested reader to go find how many times that I (or anyone else) in this thread has insisted that what I'm doing in researching this topic MUST be viewed as Traveller "canon" or otherwise demanded that my work product be accepted into the OTU, verbatim (or else).
 
I don't have anything against house rules, I've posted a few of them myself over the years:


that one was 19 years ago and was an attempt to add surface area as a variable to CT ship design


another 19 year old thread, actually an addendum to an older thread. 20 years, what a waste of a life...


Here was an option for adding a CIC, also 19 years ago


Here is one of many attempts to add armour to LBB:2 ships


And of course the expanded letter drive to hull table from 19 years ago.


I like house rules. I like making stuff up. I like it when others do so so I can learn from them.
 
😭 😭 😭
😭 😭 😭

I can't believe I made such a foundational error with my deck plans. 🫣
And worse yet, my own intellectual honesty compels me to correct the oversight. 😓

What am I talking about? :unsure:

Bulkhead thickness.

Yeah. :cautious:
The bulkhead walls I've been drawing aren't thick enough for TL=9.
They work just fine for TL=10 ... but not for TL=9.

Allow me to explain. 🤓



During the run of CT, to my knowledge there was never a specific thickness for bulkhead walls given in starship deck plans. The visual language used for deck plans was symbolic, rather than wargamer millimeter accurate.

The MT starship design system came along later and specified Armor Rating 40 as computed by CT Striker to be the protection value of starship hull metal @ USP armor code zero.

CT Striker Book 4, p5 specifies that Armor Rating 40 is the equivalent of 33.6cm of hard steel.
  • TL=6 Hard Steel = x1 toughness
  • TL=7-9 Composite Laminates = x2 toughness
  • TL=10-11 Crystaliron = x4 toughness
  • TL=12-13 Superdense = x7 toughness
  • TL=14-15 Bonded Superdense = x14 toughness
Which means that in order to achieve the necessary Armor Rating, different tech levels require the following hull metal bulkhead thicknesses:
  • TL=6 Hard Steel = 33.6cm
  • TL=7-9 Composite Laminates = 16.8cm
  • TL=10-11 Crystaliron = 8.4cm
  • TL=12-13 Superdense = 4.8cm
  • TL=14-15 Bonded Superdense = 2.4cm
However, when working on deck plans where 60 pixels = 1.5m of scaling, these bulkhead thicknesses start becoming relevant to "how wide the lines ought to be" on the deck plans. A simpler way to think of it is in terms of 40 pixels = 1m. So with that in mind ...
  • TL=6 Hard Steel = 33.6cm = 13.44 ≈ 14 pixels wide at scale (35cm = Armor Rating 40)
  • TL=7-9 Composite Laminates = 16.8cm = 6.72 ≈ 8 pixels wide at scale (20cm = Armor Rating 42)
  • TL=10-11 Crystaliron = 8.4cm = 3.36 ≈ 4 pixels wide at scale (10cm = Armor Rating 42)
  • TL=12-13 Superdense = 4.8cm = 1.92 ≈ 2 pixels wide at scale (5cm = Armor Rating 40)
  • TL=14-15 Bonded Superdense = 2.4cm = 0.96 = 1 pixel wide at scale (2.5cm = Armor Rating 40)
For all of the deck plans I've been drawing in this thread so far, up to this point, there have been 2 constants.
  • Bulkheads are 4 pixels wide.
  • Interior partitions are 2 pixels wide.
Which WORKS for TL=10 and bulkhead walls made out of Crystaliron armor technology.
But that's TL=10. 😓

At TL=9, using Composite Laminates to make the bulkheads, those walls should be 8 pixels thick, not just 4.
I'm using even numbered integers so as to be able to "balance" the weight of lines around the background grid that I'm working on top of, hence the "round up to next even numbered integer" going on @ TL=7-13.



So I'm going to have to do all of my deck plans for 16 ton Boxes @ TL=9 all over again, because all of the bulkhead walls need to be thicker than I've drawn them (using TL=10 hull metal crystaliron). That change in bulkhead wall thickness is going to force a few adjustments (here & there) in order to make things (still) fit, but I'm not anticipating any kind of wholesale revision from scratch being necessary.

Although, since I do have the opportunity of "redoing everything" ... perhaps I could "reverse" the layout of the staterooms so as to push the freshers (and all their plumbing) towards the center. That would then move the windows towards the corners and mean there is more space in the middle of the port/starboard walls for umbilical/robot arm hookups and other utility services. This would in turn push the side access doors on the Cargo Box design from the ends towards the middle. :unsure:

This bears investing a bit more interior redesign thought into how everything ought to fit together.



At the very least, I'm satisfied with the 9.8m x 7.6m x 3m exterior form factor dimensions, so I'll be able to keep that form factor moving forward.
 
I vote you forgive yourself, be happy, and move forward. :) (y)

I figure while it might make a little difference in some cases, mostly the directional drawings and calculations will still be of value because you do not need to start all of it over. Just some adjustments. :)
 
I figure while it might make a little difference in some cases, mostly the directional drawings and calculations will still be of value because you do not need to start all of it over. Just some adjustments. :)
Attention to detail is commendable , but is it necessary in this situation?
I appreciate the courtesy behind those comments from both of you.

In the most literalist interpretation ... no, it's completely unnecessary to redo any of the deck plans I've made. The visual language used is meant to be symbolic rather than literal.

The difficulty is that I'm taking things to the next level of detail specificity. I'm showing DETAILED interiors (furniture, amenities, etc.) in a way that amounts to interior decorating.

And like I said, my own intellectual honesty concerning the question compels me to redo everything with thicker bulkhead walls.
If nothing else, it will help to (visually) bring out that "this is TL=9" flavor to what I'm doing. That way the results are more successfully immersive ... which is what we all really want in the long run.
I wonder if you could get away with it by invoking the deckplan leeway rule?
I kinda sort of have to already.

Consider that the exterior of a 16 ton Box is 9.8m x 7.6m x 3m on the outside.
  • 9.8*7.6*3/14 = 15.96 ≈ 16 tons
But what about the INSIDE? :oops:
If the bulkhead walls are 20cm thick ... on each side ... that means that the interior volume available is 9.4m x 7.2m x 2.6m ... right?
  • 9.4*7.2*2.6/14 = 12.56914286 ≈ 12.6 tons
16/12.6 = 126.98%
12.6/16 = 78.75%

To put things politely, that's already breaking the +/- 10-20% deck plan leeway guideline. 😓



What I would actually need to do is "split the difference" and make the 9.8x7.6x3 dimensions be the "middle of each bulkhead" instead of the outer bounds of each bulkhead, simply because the bulkheads need to be so thick at TL=9 (compared to what you can get away with at higher tech levels with better materials).

If I do that, then the outer dimensions of a 16 ton Box turns into 10m x 7.8m x 3.2m on the outside.
  • 10*7.8*3.2/14 = 17.82857143 ≈ 17.8 tons
As for the interior dimensions, those would become 9.6m x 7.4m x 2.8m on the inside (because 20cm thick bulkeads on each of the 6 sides).
  • 9.6*7.4*2.8/14 = 14.208 ≈ 14.2 tons
And then if I do a +/- 10-20% deck plan "sanity" cross-check, here's how those numbers turn out.
  • Exterior: 17.8/16 = 111.25%
  • Interior: 14.208/16 = 88.8%
So as you can see, by "shifting the boundaries" of expectation to better take advantage of the deck plan leeway guideline (measure tonnage from the center of the bulkheads, not from the "outside boundary" of the bulkheads) in a fair and reasonable way can actually yield a more intellectually honest result.



One side effect of doing this revision could be the notion that because the bulkhead walls have to be SO THICK @ TL=9, particularly compared to later higher technology levels with better metallurgy, manufacturing and industrial base processes ... perhaps the overall height of decks in a TL=9 starship are also increased?

Instead of decks being 3m high overall, they need to be 3.5m high in order to account for the increased thickness of the bulkhead material. Interior habitable space would remain 2.4-2.5m (as standard in Traveller), but the deck spacing needs to be thicker at lower tech levels.

One of those little nuances you only think of when you start to REALLY dig down deep into the details (like an interior designer).



Suffice it to say, when I redo the deck plans with this parameter in mind, it's going to make a subtle yet distinctive impact on what things "look like" in the deck plan drawings.
@Spinward Flow 's tough love might be a bitter pill for many of us to swallow on CotI sometimes, but I can't help but see how cool he is for taking his own bitter medicine.
"Paganism. It's not just for heretics anymore!" 😅

Like I said, my own intellectual honesty compels me to take this course of action. Fortunately, I'm not at all put out by this turn of events. That's because I'm taking this seriously, even if not everyone in my position would (or cares to).

A good product released "late" will be a good product that can withstand the test of time.
A bad product released "on time" will remain Bad Forever™.

Besides, this is why I'm doing all this pondering and pontificating on the topic here in the Lone Star forum, instead of The Fleet forum. Here I can "talk about stuffs™" without needing to be right about everything at all times. I can debate the merits of choices made and look back on the history of what I've done to see if there's anything that could have been (let alone, should have been) done BETTER.

Even when you're pretty sure you've found the right answer(s), always keep questioning your assumptions and your results.
Sometimes you'll find some nuance or possibility that you weren't expecting. :unsure:
 
This kind of touches on something I had to 'hand wave' in the early days I got back into Traveller with T20 after getting into creating ships. Hull & wall/bulkhead thicknesses. for a 100 dton ship, I have 100 dtons of space to work with, which doesn't take into consideration how much dtons the hull & wall/bulkheads take. The closest you come to that in T20 is when you start putting armor on the ship.

This has come up before in many other Threads and Posts with ideas going in many different directions, and I decided that I don't need to worry about it, because I just want to have fun. But considering right now after Spins comments, I guess I could make the ships hull the first level of armor for a little more reality in taking up dton space, and then do armor normally if needed, in military ships for instance. I don't need to worry about walls too much, but I had thought of using armor rules to take space for bulkheads and just mark where they would be placed without worrying about the space they take up, as I've taken that space out of the total space used for the ships interior. A house rule for sure, but something a little more comfortable than 'handwavium technology'.
 
I decided that I don't need to worry about it, because I just want to have fun.
If the game isn't fun, you stop playing it.
But considering right now after Spins comments, I guess I could make the ships hull the first level of armor for a little more reality in taking up dton space, and then do armor normally if needed, in military ships for instance. I don't need to worry about walls too much, but I had thought of using armor rules to take space for bulkheads and just mark where they would be placed without worrying about the space they take up, as I've taken that space out of the total space used for the ships interior.
Honestly, it kind of depends on how "deeply" you want to wade into the weeds of details.

My personal thought is that an armored craft doesn't just have "thicker walls" (although they do) in the deck plans, there's also going to be more segregation into pressure compartments ... up to and including the inclusion of airlocks in between separated pressure hulls within the outer hull of the craft. That way, some of the tonnage dedicated to armor can yield additional (pressure sealing) choke points between compartments, rather than a wider open deck plan divided up by interior partitions.

So it isn't just a matter of "wall thickness" everywhere (although that is part of it), but rather than the shapes and arrangements of interior spaces get more compartmentalized to limit the propagation of damage when there is a hit taken by any given compartment.

Less eggs per basket ... and more baskets ... basically.

That kind of modification of interior design "doesn't happen for free" so there is a tonnage cost associated with it.
Yes, the outer hull skin on the craft gets thicker, but the arrangement of interior spaces changes too, including the bracing and robustness of every component. Think of the sights and sounds and "industrial design" of the Klingon B'rel class bridge as an example.

 
Yeah. :cautious:
The bulkhead walls I've been drawing aren't thick enough for TL=9.
They work just fine for TL=10 ... but not for TL=9.
So to recap, this was the 16 ton Stateroom Box (with lounge common area) that I did previously featuring bulkhead walls "appropriately thick" for TL=10 (crystaliron) construction.

djyFbGi.png


And here's what happens when the bulkhead walls need to be "double thickness" for TL=9 (composite laminates) construction.

SOGZWs9.png


Makes a little bit of a difference ... doesn't it? :rolleyes:

Those thicker bulkheads really help drive home (visually) that this is "lower tech" (TL=9) than is often times seen in these kinds of deck plans. The material isn't as strong (composite laminates vs crystaliron), so in order to make up the difference, bulk is required.

Had the opportunity to make a few minor tweaks here and there (the galley counter and oven/laundry space is reversed, used smaller sinks in the freshers to allow more "walkable space" within the fresher rooms, reversed the orientation of the closets because of the bulkhead corners change detailed below) ... but otherwise the layout is substantially similar.

On modification that I made for the TL=9 version is that since the walls were already SO THICK (8 pixels instead of 4), I might as well (more or less) uniformly bevel the corners in the pressure compartments to improve pressure containment relative to vacuum when the Boxes are docked externally for transport.

My initial thought as a rationale for this change is that "corner places" such as the outer 4 corners as well as the inner 4 corners around the grav lift would need to be accommodating docking systems attachment points to achieve and retain a hard dock mating with other Boxes when linking them up into arrays. Consequently, those corner locations would need to have "holes for docking linkages" put into those places, which could potentially weaken them enough to fall below the required armor rating standard ... so the obvious solution was then to simply "add a little bulk" into those corners to counter any reduction in structural integrity.

I can easily imagine that there are beveled edges where walls meet interior ceilings and floors, for structural reasons (to strengthen the joins) and also to reduce the "rectangular prism/box" feel of each compartment when you're inside. Something of an interior design aesthetic choice brought on by practical engineering compromises in which form needs to be subordinate to function.



Overall, I'm VERY PLEASED with how this TL=9 update turned out, even though each compartment has "fewer pixels to work with" in terms of floor area compared to the TL=10 version posted previously.

What I wasn't expecting to have happen is the result you can see in the TL=9 deck plan image, where all of the compartment corners get "softened" away from being hard 90º edges coming together (which in pressure integrity terms are then the weakest points). At first, I was thinking I would only do the beveled corners around the grav lift in the center (facing inwards), but then when I saw what a difference it made, I started proliferating the decision outwards to other corner points. In the end, only the windows don't get beveled corners next to them.

And I don't know about anyone else, but the way those beveled corners "work" around the iris valves on the central access corridor just looks fantastic to my eyes ... enough so that I'm now wondering why I didn't do anything like it before (easy answer, the bulkheads weren't thick enough for this kind of thing to work all that well). Still, now that I've done it here (@ TL=9), I think I'll keep doing it with all of the remaining Box deck plans I need to (re)make for TL=9. :unsure:



I did try to reverse the layout of the staterooms (freshers towards the center instead of the ends) and I just couldn't make it work. The location of the iris valve access into each stateroom doesn't leave enough floor space to put the fresher (and partition wall) on the opposite side of each stateroom compartment. After doing a few experiments to try and make the idea work, I gave up and re-used the interior arrangement you see above. It was worth a try (again), but I just couldn't make it work.
 
The thicker wall really bring home how fragile life is in space due to the requirements of protecting it. Especially at the lower tech levels. Good visuals @Spinward Flow .

Even if I went in the direction of keeping things simple by not worrying about the walls & stuff, it can still be roleplayed just by saying the lower tech ships have cramped interior spaces.
 
Do the boxes have to be bulkhead grade?
If they are internal then you could get away with internal wall thickness.

As to the accounting for bulkheads etc in rules, if you read the armour requirement in HG a certain way it can be argued that an armour value of zero requires some of the hull.
4+4a, 3+3a, 2+2a. 1+a so am armour of zero still requires 4, 3, 2 or 1% of the hull spent on bulkheads etc., much like the waste space of planetoid ships (quite why you can tunnel into an asteroid to build a ship but you can't make a sphere of bonded superdense and tunnel into that...
 
The thicker wall really bring home how fragile life is in space due to the requirements of protecting it. Especially at the lower tech levels. Good visuals @Spinward Flow.

Hence why I wanted to do it. :sneaky:(y)
But yeah ... 20cm thick composite laminates as bulkheads @ TL=7-9 for small craft/big craft design.
Really helps to bring home what a difference TL=10 makes to the naval architect's office, doesn't it? :rolleyes:

Do the boxes have to be bulkhead grade?

iIY9WSA.gif


As to the accounting for bulkheads etc in rules, if you read the armour requirement in HG a certain way it can be argued that an armour value of zero requires some of the hull.
Except NO ONE DOES THAT ... and even the CT Errata specifically calls that interpretation out as something that is not (and shall not) be done.

There's even an easy "test case" for the fact that what you're talking about here is ... complete and utter bunk that is easily disproven.

Pick a LBB5.80 starship design out of LBB S9 with Armor: 0 and reverse engineer it back to its spreadsheet origins. Use that to determine if armor (including armor: 0) is computed the way that you're suggesting.
Wash, rinse, repeat until you find a published starship design that does what you're recommending.

Until then ... I say, "good day to you, sir."
 
And here's what happens when the bulkhead walls need to be "double thickness" for TL=9 (composite laminates) construction.

SOGZWs9.png
And here's what happens when you swap out the holo lounge for a sick bay.

qLYmDbn.png


The TL=9 sick bay can still fit:
  • 1 Autodoc bed
  • 1 Closet for miscellaneous storage
  • 1 Privacy Screen retractable curtain
  • 1 Medical Workstation for the attending medic
  • 1 Medical Locker for specialized medical storage that needs to be kept secure
🥰
 
Some questions about the graphics (forgive me if you have also explained it):

  • I see a square in the center that seems a lift (between two . If so where is it planned to go?
  • Why the airlocks? If the container is expected to be inside a ship, I don’t see the need for them (after all, the room doors in most ships are not bulkheads, but simple doors)
 
Bulkhead thickness.
Appreciate the attention to detail there. It's farther than I generally go.

(When drawing in 0.5"=1.5m; I use 1px for interior details/furniture, 3px for partition walls, 5px for interior bulkheads, 7px for exterior hull.) In my work, I consider the line weights to be indicative, not descriptive.
 
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