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HG2: Tigress Design: Volume of Components

The drop tank scenario is my preferred option. A lot is made of drop tanks in the early OTU. Stand to reason that the IN would use them to quickly deploy their reserve fleets
 
I searched the TML archives, and couldn't come up with any mention back to 2001. Archives from before that are not in searchable format (they're tucked away in zip files on a ftp server).
 
Well using fuel calculations from FF&S1 which I believe are more efficient for jump drives than earlier construction sequences? Jump Fuel = 5xVolume of Jump drive for a jump of its maximum rated capacity. A J4 drive for a Tigress takes up 5% of the volume (25,000 dt) and requires 125,000dt fuel for 1 Jump 4, or 31,250dt for a jump-1

For a Tigress to carry fuel for jump-1 in drop tanks means the drop tanks the size of cruisers (31,250 dt per jump number to be exact) So either this consists of a number of big tanks or lots of smaller ones.
 
It doesn't really matter if the FF&S1 fuel calculations are better or worse than HG2, the design is HG2 and uses HG2 rules, so the Tigress needs 40% of its tonnage set aside for jump fuel to be able to autonomously utilize J4.
 
Incidently I used the FF&S1 fuel calculations to make a point. Since HG2s jump fuel requirement is higher drop tank capacity will need to be higher.

On that basis since people are considering attaching drop tanks to battleships and under HG2 the Tigress needs 40% Jump fuel for jump 4 it would need 50,000dt of fuel carried in drop tanks for each jump number it requires.

Also in HG2 can drop tanks be used to provide part of the fuel for a jump (ie 75% of the jump fuel from inside the Tigress, 25% from drop tanks dropped prior to jump so as to make Jump-4)?
 
A really nasty trick would be to use drop tanks for the full jump 4 (200,000t of fuel) leaving enough for a jump 3 tactical retreat ;)

Starts to get a bit expensive though :(
 
Originally posted by Antony:
Incidently I used the FF&S1 fuel calculations to make a point. Since HG2s jump fuel requirement is higher drop tank capacity will need to be higher.

On that basis since people are considering attaching drop tanks to battleships and under HG2 the Tigress needs 40% Jump fuel for jump 4 it would need 50,000dt of fuel carried in drop tanks for each jump number it requires.

Also in HG2 can drop tanks be used to provide part of the fuel for a jump (ie 75% of the jump fuel from inside the Tigress, 25% from drop tanks dropped prior to jump so as to make Jump-4)?
Yes, HG2 allows for any method to come up with the required fuel tankage; it doesn't have to be either all-internal or all-drop tanks.
 
Originally posted by Sigg Oddra:
A really nasty trick would be to use drop tanks for the full jump 4 (200,000t of fuel) leaving enough for a jump 3 tactical retreat ;)

Starts to get a bit expensive though :(
That's how I generally design my raiding ships, though with J6 drop and J3 or 4 internal, to give a nice, initial J9-10 burst
Using drop tanks that way on regular forces would be hideously expensive in terms of the amount of tenders and bulk transports required to keep the fleet in d-tanks ;)
 
Originally posted by Antony:
Well using fuel calculations from FF&S1 which I believe are more efficient for jump drives than earlier construction sequences? Jump Fuel = 5xVolume of Jump drive for a jump of its maximum rated capacity. A J4 drive for a Tigress takes up 5% of the volume (25,000 dt) and requires 125,000dt fuel for 1 Jump 4, or 31,250dt for a jump-1

For a Tigress to carry fuel for jump-1 in drop tanks means the drop tanks the size of cruisers (31,250 dt per jump number to be exact) So either this consists of a number of big tanks or lots of smaller ones.
That's NOT FF&S1. That's MT.
 
Using HGS (thanks, Andrew) I can make a Tigress that has J-4 internal fuel, all the weapons, and the fighters.

Changes include (most seriously) armor-7, no aux bridge (did the Tigress ever have one? Supp. 9 is silent on that), and I got rid of the 500-man security battalion and just gave her a 50-man marine platoon for boarding defense (those 1000 crew in services should be able to slow any invaders down some).

She still has nearly 3,000 dtons left, so adding backups for computer and screens wouldn't be difficult.

In HG combat the armor would be a disadvantage, however in PP:F this would (just barely) rate as medium armor, equal to the protection found on all other Imperial DNs.

I can't see any way to get factor-15 armor into a Tigress, not with HG2. Of course, IIRC all of the "new" Supp. 9 designs (non-LBB2, that is) were done with HG1, which had several differences. Perhaps that's where they got the tonnage. I find that if I take my design and change all the 50-ton missile bays to 10-ton bays (thanks to the "User Defined" section of HGS) I can get my Tigress to factor-11 armor.

Anyone with a copy of HG1 want to check out a Tigress design?

Maybe the Imperial TL15 Jump-4 fleet is a myth.
 
I'm affaid that's they way I'd have to say it would go. The Imperium was pressing its front-line ships to all be M-6/J-4; the first for its defensive utility, and the second for strategic utility. There are many places in the Imperium, astrographically speaking, where only having your BatRons be J-3 would be quite a disadvantage.
 
The Imperium's "front line" ships during the FFW were the Colonial Squadrons, of which only 4 are rated as BatRons. Two of these are jump 1, one is jump 3 and one is jump 4.
There are also 2 regular Navy BatRons in The Spinward Marches, and we know from TSMC that the Battle Rider 154th BatRon should be one of them.

The Imperial Navy reserve fleets consist of 16 jump 4 squadrons, 14 jump 3 squadrons, and 2 jump 2 squadrons, the majority of which should probably be considered to be Battle Rider/Tender BatRons.
 
It would make more sense for the squadrons that are kept in reserve (at the Depot in Corridor Sector) to be Jump-4 so they can get to trouble spots quickly, while the battleships along the frontier just need enough jump to get out of trouble.

Ah, well.
 
Originally posted by The Oz:
It would make more sense for the squadrons that are kept in reserve (at the Depot in Corridor Sector) to be Jump-4 so they can get to trouble spots quickly, while the battleships along the frontier just need enough jump to get out of trouble.

Ah, well.
This seems to be the case. All of the Colonial Reserve forces, available from turn 6, are jump 4. They must come from Deneb and the lower half of the Spinward Marches.
All of the regular Imperial Navy jump 3. BatRons must be rider squadrons because their jump number increases to 4 when they ar damaged (lose a rider or two?). The tender could make jump 4 and pick up the riders closer to the front line (possibly tenders from Corridor making jump 5 and then picking up riders at Depot/Deneb???).
 
Originally posted by Sigg Oddra:
The Imperium's "front line" ships during the FFW were the Colonial Squadrons, of which only 4 are rated as BatRons. Two of these are jump 1, one is jump 3 and one is jump 4.
There are also 2 regular Navy BatRons in The Spinward Marches, and we know from TSMC that the Battle Rider 154th BatRon should be one of them.

The Imperial Navy reserve fleets consist of 16 jump 4 squadrons, 14 jump 3 squadrons, and 2 jump 2 squadrons, the majority of which should probably be considered to be Battle Rider/Tender BatRons.
Only 4 Imp BatRons . . . total?!? For the whole 5th Frontier War? The Sector Budget alone could build and maintain a lot more than that (I'm away from my home and books, and can't add up costs right at the moment), but the Sector Budget for the Spinward Marches was at least a 100 trillion credits, hmmm, possibly more, I'll have to check when I get home

That would weigh heavily, IMO, against using the FFW game fleet stats to represent what the Imperium actually has and can field.
 
Originally posted by The Oz:
It would make more sense for the squadrons that are kept in reserve (at the Depot in Corridor Sector) to be Jump-4 so they can get to trouble spots quickly, while the battleships along the frontier just need enough jump to get out of trouble.

Ah, well.
But when retreating forces meet up with advancing reserves and pool their numbers, the "frontier" force will not be able to advance at the speed of the "reserve" forces.
 
Rain, what has to be remembered about FFW is that it does not portray the entire Marches, only the subsectors where the main fighting took place (approximately a half-sector) and as such only a fraction of the total Spinward Marches military is represented. Considering that forces not represented in the game are assumed to be conducting the offensive into the Sword Worlds and holding off the Vargr towards Corridor, the forces at the disposal of the Marches must be huge, especially when considering that the Colonial Rimward Reinforcements which arrive on week 6 of hostilities are probably what could be spared (and are a huge force, consisting of 6 Batrons and probably a dozen or so Crurons, all at J4).

EDIT: Also, the 4 BatRons referred to in the original post are the colonial BatRons - Jewell, Efate, Porozlo, and Zivijie. There are also 2 Imperial BatRons present in the immediate combat area, with the rest in the reserve.
 
(3 hours later): I'm home, the budget for the Spinward Marches I run IMTU is 41.6 Trillion. Say, about 8-10 Trillion out of the Sector for the Military. The Imperial Budget is 2.1 Quadrillion under this (with the Emperor's personal cut at 21 Trillion; nobles, eat your hearts out!). Hmm, even at 20% on the IN, divided by 19 Main Sectors, for about 22.4 Billion in military contributions per Sector from the top. Hmmm, that was quite a bit less than I thought, and a bit larger percentage that I wanted to hazard. This will bear some thinking on.
 
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