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MegaTraveller Discuss of the MegaTraveller ruleset and the Rebellion Milieu

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  #11  
Old March 27th, 2009, 06:38 PM
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Ranger, I'm trying to recreate your results on other vehicles for comparison and I'm missing something.

What is the number you are using as "base"?
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  #12  
Old March 27th, 2009, 07:13 PM
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Well, its not actually mine, I just copied it off the web a few years ago (don't want to take credit for someone elses work). To be honest, I am just assuming his ratios equal up to the total volume for armor.

The way I've used it was to go to Table 9 on pg 43 of the Ref's Manual to convert the armor ratings to actual thickness, then back to armor ratings.

So, if you start with an Armor rating of 40, that becomes a Mod of 33 and you use that as the base. So for the front Armor, you take 33 x 3, which give you 99. go down the Mod column until you get to that Mod level without going over, and it gives you the new Armor Rating. In this case you have 95.1 (the next line is 104). The Armor Rating for that line is 52. Just keep doing the same for each of the various facings.

Does that make sense?
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Old March 27th, 2009, 07:36 PM
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Quote:
Originally Posted by Ranger View Post
Does that make sense?
Yes. Thanks for the clarification and thanks to Stuart for the latest house rule to add to my files.
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  #14  
Old March 29th, 2009, 10:37 PM
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I figured you would find it useful in your project. I found it because I was trying to retrofit some of the vehicles to Striker without completely redesigning them. BTW, if you think the Trepida is a mess, wait till you start working on the Astrin.

Considering there are a couple of other Imperial tanks that are much better over all, I would say the way to look at the Trepida is as part of an larger equipment package which includes the Astrin and the dismounted infantry it carries. If you take a 4 vehicle package, and give it 2 Trepidas and 2 Astrins (which carry 2 dismounted squads), then the Trepida makes a little more sense as a sort of "infantry tank." No anti-infantry weapons because the infantry in the Astrins provide security against other infantry. The Trepidas provide the local anti-armor combat power, the Astrins provide the speed for the infantry, and the infantry provide the anti-infantry combat power.

Just a thinking out loud.
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Old March 29th, 2009, 11:55 PM
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Don't forget: Trepidas are able to operate surface to orbit... they are far more akin to AH64's than to M1A3's in terms of combat mission types. They don't NEED anti-infantry... they provide cover in mixed units (probably at a Bn level: Co A 3 Plt Inf, Co B & C 3 Plt Astrin, Co D 2 Plt Trepida, 1 Plt Astrin Special Assets {EW, Medic, Command, recovery}.)

In pure grav-armor, they are slow aircraft... Faster than helos, more nimble than many fixed wing, more powerful than either... but boy howdy, expensive. Against dangerous infantry, they disengage... by altitude. Against most infantry, they overkill.
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  #16  
Old March 30th, 2009, 08:14 PM
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Ranger and Aramis, I've been thinking along the lines of what types of vehicles with what capabilities I'd need to make to cover the weaknesses of the Trepida as shown, so I guess we're all thinking along the same lines.

And, I'll also pile on to aramis' post - grav vehicles have more in common with today's attack helos than they do with today's MBTs.

You're all making a strong case and leading me to believe that my initial impressions were a bit too harsh. Other than the actual errors in the published UCP, the design is not broken but it does have weaknesses. I think that the Trepida that ends up IMTU will have the VRFGG mounted coaxially to the main gun and will have a better commo suite, but no more.

And Ranger, your warning about the Astrin actually frightens me a little, because that was my next target vehicle, to be followed by the Empress.

Is there an interest in seeing a redone Trepida, to fix the errors and expand the UCP similar to what I did for the cavalry vehicle designs I've posted in the file library? If not, I'll just keep it for MTU, other than to post the errata changes for Don's compendium.
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  #17  
Old March 30th, 2009, 09:08 PM
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I only really used the Trepida and Astrin as color, really... but if you do it, it's worth sharing anyway.
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  #18  
Old March 30th, 2009, 10:23 PM
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Well, the issue with the Astrin is that it's listed as 10 tons, but it has the same damage capacity as the Trepida, and its supposed to have the same volume as the Trepida (10 tons + 30%) as well. Plus it has a hard point, but no weapon system (which seems odd to me).
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  #19  
Old January 15th, 2010, 12:50 PM
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Default More on armor facings

Today I came back to look again at the armor facings rule by Stuart Machin (posted kindly by Ranger). I took a closer look so I could draft it into my growing house rules compendium and found a couple of problems.

I thought I'd post the problems and my solution here fr two reasons - to get fresh eyes on to check my work and (if correct) get the solution out where others might use it.

Stuart's model for determining the facing multipliers assumed a vehicle with height h, width 1.5 x h, and length 9 x h, producing a surface area of 50h2. Two problems with this that I see: Those dimensions produced a surface area of 48h2 when I did the math and a length of 9h seemed excessive to me.

For surface area, I assumed h = 1m so (1.5 + 1.5 + 9 + 9 + 13.5 + 13.5) = 48 m2

Second, rough comparisons of data for the M4, Pz V, M60, T72, M1, and T90 gave width values that ranged between (.95 x h) and (1.7 x h). The trend increased as designs modernized so Stuart's 1.5 figure seems reasonable, but length was off significantly. The range I found progressed from (2.13 x h) to (3.25 x h) so I used a length of (3 x h).

The results are not far off Stuart's marks. Retaining the 3x modifier for the front facing, 1.4 for the sides, .6 for the top, and .4 for the rear facing means the only change required is to reduce the bottom facing multiplier from .6 to .4.
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  #20  
Old January 15th, 2010, 02:59 PM
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1x1.6x9 is 50.
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Count Terra (SOLO 1827)
Count Gorod (REFT 1302)
Count of the Third Imperium (SPIN 2232)
Viscount of Adabicci (SPIN 1824)
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Marquis of the Third Imperium (SPIN 2410)
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Sir William Hostman (OLDE 0512)
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SEH w/Diamonds for Extreme Heroism - Battle of Boughene
MCG - Battle of Boughene
TAS: William Hostman (CORR 2506)
TAS: Bearer (DAIB 1326)
IMTU ct+ tm++ tne tg-- tt+ tmo+ t4- t20+ to ru+ ge+ 3i+ c+ jt au ls pi+ ta he+ st+
Wil Hostman 0602 C539857-9 S A724
OTU: 95% 3i an+ au+ br- cpu± dt± f+ fs++ ge± ih- inf± j± jf+ jm+ jt+ ls- n= nc+ pi+ pp-- tp+ tr+ tv- vi-- xb+-
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