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The Fleet Ship designs, strategies, and tactics.

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Old May 22nd, 2020, 02:50 PM
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Default type 23 Corvette

The humble type 23 corvette was created as a cheaper alternative to the classic type T patrol corvette, intended to fulfill many or the roles of the type T at a lower cost per craft. Coming in at under 3/4ths the cost of a type T, the type 23 (named for its mobility profile: Jump 2, 3G maneuver) is a classic “small ship for small tasks”, such as presence patrols or convoy escort. In these roles, the higher performance of the type T is often unneeded, as the ship is often tied to protection of merchants with 1g or 2g drives and J2 at best.

By using smaller engines, significant savings in cost are achieved (62 Mcr vs 78 Mcr), and the missile barbette gives it almost the same offensive firepower on a smaller hull, which is also better armoured than the type T. The type 23 also boasts a better sensor and EW system than the type T. The type 23 retains the small craft and boarding team concept form the type T, allowing boarding and inspections while maintaining stand-off distance with the main craft, although both are smaller, and the G-carrier deleted, to keep the tonnage and cost down.

In service with subsector navies throughout the imperium, the type 23 is a familiar sight in backwater systems and in quieter frontier zones, and a welcome sight for the free traders that ply their trade in those areas. The inability of the type 23 to keep up with the main fleet has the beneficial side effect that it is rarely seconded for fleet duties, which keeps it free for anti-piracy and presence patrols, or escorting convoys (they are a mainstay of the Fist-Tyokh convoys in the Trojan Reach). For many minor systems, the type 23 is often the only Imperial Navy vessel that is seen more than once a year, and is considered the "face" of the Third Imperium.


stats (MgT 2nd Ed)
Spoiler:

300 ton hull (15mcr)
Streamlined: 3Mcr
Armour : crystaliron, 8 pts (30 tons, 7.2 Mcr)

Drives:
M Drive: 3G (9 tons, 18Mcr)
J Drive: J2 (20 tons, 30Mcr)
P plant: 210PP, TL 12 Fusion (14 tons, 14 Mcr)

Fuel: 64 tons: (1x J2, 4 weeks P-plant plus 2 tons small craft fuel)

Fuel processors: 1 ton (20 tons/day, 0.05 Mcr)

Power:
Basic systems: 60 pp
M Drive: 90 pp
J Drive: 60 pp
Weapons: 18pp
Sensors: 4 pp

Bridge: standard, (20 tons, 1.5 Mcr)
Computer/15: 2 Mcr
Programs:
manoever/0
jump/2
Fire control/1
evade/1
Total cost: 4.2 Mcr
Sensors: Improved (3 tons 4.3 Mcr)

Crew:
Captain: 1
Astrogator: 1
Engineers: 2
Medic: 1
Gunners: 3
Small craft crew: 2
Ships troops: 5
Total: 15
Total staterooms: 10 (40 tons, 5Mcr)
Common areas: 10 tons 1Mcr







Weapons:
Missile Barbette: 5 tons, 4 Mcr
Triple turret: Pulse laser/Pulse laser/ sandcaster (1 ton, 9pp, 3.25 Mcr)
Triple turret: Pulse laser/Pulse laser/ sandcaster(1 ton, 9pp, 3.25 Mcr)
Ammo:
25 missiles in barbette, 84 in magazine (7 tons) (2.25Mcr)
24 sandcaster barrels in turrets (12/each), 100 in magazine (5 tons) (0.17Mcr)

Extras:
Armoury: 2 tons 0.5Mcr
Medbay: 4 tons 2 Mcr
Gig (6.732 Mcr),
20 ton Full hanger (40 tons, 8Mcr)
UNREP system: 20tons/hour ( 1 pp, 1 ton, 0.5 Mcr)
Cargo: 23 tons

Total 300 tons.
Cost “empty” = 124.75 Mcr
Cost with small craft and ammo : 133.902Mcr
monthly mortage cost: 519,791 Cr/month

life support: 10,000 Cr/month stateroom costs
15,000 CR month crew costs
maintance costs: 10,395 Cr/month
monthly upkeep costs : 35, 395 CR/Month



first ship ive designed for ages, so I probably made quite a few errors in its design. any comments, critiques and such are welcome.

As mentioned, the ship is intended to be a slower, cheaper type T. it's somewhat inspired by the numerous destroyer escort/corvette/frigate type designs of the second world war, medium capability designs that were cheap enough to produce en masse, and capable enough for the job they were needed for.

I have also heard that they was a disinclination for using full sized fleet destroyers like the Fletcher class for convoy escorts, because they were overkill for it, and not really any better at it than the smaller, cheaper ships.
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Last edited by Xerxeskingofking; May 25th, 2020 at 05:11 AM.. Reason: error correction and changes
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Old May 22nd, 2020, 04:45 PM
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Iguess it's designed on MgT2e rules. Right?
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Old May 22nd, 2020, 04:58 PM
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sorry, yes, its 2nd ed rules. if you want to try something in 1st ed, or CT or some other system, please, go ahead. I'd edit that into the first post
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Then it's Tommy this, an' Tommy that, an` Tommy, 'ow's yer soul? "
But it's " Thin red line of 'eroes " when the drums begin to roll
The drums begin to roll, my boys, the drums begin to roll,
O it's " Thin red line of 'eroes, " when the drums begin to roll.

"Tommy", Rudyard Kipling
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Old May 22nd, 2020, 05:29 PM
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Quote:
Originally Posted by Xerxeskingofking View Post
first ship ive designed for ages, so I probably made quite a few errors in its design. any comments, critiques and such are welcome.
Looks good!

Armour cost should be based on total hull cost (including configuration cost), so MCr 18 8 5% = MCr 7.2. (See Scout, HG p110)

Jump drive should be Hull J-number 2,5% + 5 Dt = 300 2 2.5% + 5 = 15 + 5 = 20 Dton, cost 20 Dton 1.5 = MCr 30. (HG, p15)


You could save some space and a little money with a Docking Space for the Launch (instead of the Full Hangar).

A Launch is cheap, but has limited performance. A Gig is quite fast and capable of simple boarding actions.

You could improve the sensor performance with Improved Signal Processing (HG p42) and perhaps an Extension Net (HG p41) that allows you to identify sensor blips at longer range. A bit costly, but in line with the craft mission.

Perhaps add a Sensor Operator to get the most out of the sensors?
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Old May 22nd, 2020, 06:16 PM
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Quote:
Originally Posted by AnotherDilbert View Post
Looks good!

Armour cost should be based on total hull cost (including configuration cost), so MCr 18 8 5% = MCr 7.2. (See Scout, HG p110)

Jump drive should be Hull J-number 2,5% + 5 Dt = 300 2 2.5% + 5 = 15 + 5 = 20 Dton, cost 20 Dton 1.5 = MCr 30. (HG, p15)


You could save some space and a little money with a Docking Space for the Launch (instead of the Full Hangar).

A Launch is cheap, but has limited performance. A Gig is quite fast and capable of simple boarding actions.

You could improve the sensor performance with Improved Signal Processing (HG p42) and perhaps an Extension Net (HG p41) that allows you to identify sensor blips at longer range. A bit costly, but in line with the craft mission.

Perhaps add a Sensor Operator to get the most out of the sensors?
ah, that armour mistake was because I decided to add the streamlining in very late in the design process, and I forgot to adjust the armour costs when I did that. I missed that 5Dton extra for the jump drive (thats a change form the 1e rules and its not as obvious as the p plant changes), i'll have to edit that into it.

on reflection, your right, the gig is a better small craft for the ship than the launch. I can cut the hanger size in half and keep the full hanger for it (given the ships intended mission profile of being out in the boonies, having room to work on the gig onboard is going to be quite beneficial. the extra space could be given to something else. I was toying with the TL12 PD (HG 2e, pg 33) system, which would replace a caster/laser/laser turret and give it 2d6 missle intercepts a turn, but I didn't go with it in the end (if I'd kept it at 400 tons I would likely have used it)

the extra sensor options are nice, but im deliberately trying to keep the costs down. improved sensors are like 0.1Mcr more expensive, but adding either of those options you mention would nearly double the cost of the sensor systems.

good call on the sensor op/EW guy, though. I think I might add him in, and maybe a 4 ton medbay form the tonnage freed form the gig.
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Then it's Tommy this, an' Tommy that, an` Tommy, 'ow's yer soul? "
But it's " Thin red line of 'eroes " when the drums begin to roll
The drums begin to roll, my boys, the drums begin to roll,
O it's " Thin red line of 'eroes, " when the drums begin to roll.

"Tommy", Rudyard Kipling
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Old May 22nd, 2020, 07:50 PM
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Quote:
Originally Posted by Xerxeskingofking View Post
I missed that 5Dton extra for the jump drive (thats a change form the 1e rules and its not as obvious as the p plant changes), i'll have to edit that into it.
Yes, that is rather non-intuitive, but I guess necessary for compatibility with the drive tables in LBB2 and T5.


Quote:
Originally Posted by Xerxeskingofking View Post
on reflection, your right, the gig is a better small craft for the ship than the launch. I can cut the hanger size in half and keep the full hanger for it (given the ships intended mission profile of being out in the boonies, having room to work on the gig onboard is going to be quite beneficial.
The Launch and the Gig are both 20 Dt, the Gig is just faster and more expensive.

The 7 G Gig allows you to chase down ships for inspection that you might have missed with a Launch.


Quote:
Originally Posted by Xerxeskingofking View Post
I was toying with the TL12 PD (HG 2e, pg 33) system, which would replace a caster/laser/laser turret and give it 2d6 missle intercepts a turn, but I didn't go with it in the end (if I'd kept it at 400 tons I would likely have used it)
Laser turrets are very versatile, the PD Battery is a one-trick pony and quite large.

Laser turrets are somewhat effective against any threat-vector, there may be better weapons against some specific threats but none so versatile.

Laser turrets are almost as good at killing missiles as a PD Battery with a really good (augmented) gunner, not that I expect to see that on a local patrol ship.


Quote:
Originally Posted by Xerxeskingofking View Post
... and maybe a 4 ton medbay ...
Yes, that sounds like a good idea for independent patrols.
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Old May 24th, 2020, 05:07 PM
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ok, i've corrected the J drive size, switched the launch to a gig and installed the med bay. its eaten into the cargo space a bit more than i'd like (I normally aim off for about 10% tonnage as cargo room for spares and supplies), but it'll do.
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But it's " Thin red line of 'eroes " when the drums begin to roll
The drums begin to roll, my boys, the drums begin to roll,
O it's " Thin red line of 'eroes, " when the drums begin to roll.

"Tommy", Rudyard Kipling
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Old May 25th, 2020, 08:37 AM
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Looks good!
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