Anyone got cheap designs for low-tech fighters? Also I have been working on the Railgun a bit, and was wondering does it use fuel to power it, or is a Power Plant required to fuel it?
Fighters really don't work well at low tech levels as anything other than a means to get your missile launch tubes closer to the enemy. Fighters only real protection is speed, and as you are limited to a single engine, the only way to obtain reasonable speeds is to reach at least ion engines before trying to make beam fighters. You also run the problem of your sensor tech being so poor that you need large firecontrols in orger to have an effective range.
For early fighters make sure you have researched the small/tiny size crew quarters/fuel tanks/engeneering sections, as using them will save you 100 tons of space easily. The first couple of armour techs also help save quite a bit of space.
Here's one I quickly knocked up using techs that have had 2 levels researched above the base TN start.
Tribal class Fighter 215 tons 7 Crew 35.7 BP TCS 4.3 TH 36 EM 0
8372 km/s Armour 1-3 Shields 0-0 Sensors 1/1/0/0 Damage Control Rating 0 PPV 1
Maint Life 11.13 Years MSP 10 AFR 3% IFR 0.1% 1YR 0 5YR 2 Max Repair 10 MSP
Magazine 17
FTR Ion Engine E800 (1) Power 36 Fuel Use 8000% Signature 36 Armour 0 Exp 25%
Fuel Capacity 5,000 Litres Range 0.5 billion km (17 hours at full power)
Size 1 Missile Launcher (1) Missile Size 1 Rate of Fire 10
Missile Fire Control FC10-R20 (1) Range 10.3m km Resolution 20
Size 1 Missile (17) Speed: 26,700 km/s End: 6.3m Range: 10.1m km WH: 1 Size: 1 TH: 204 / 122 / 61
Missile to hit chances are vs targets moving at 3000 km/s, 5000 km/s and 10,000 km/s
This design is classed as a Fighter for production, combat and maintenance purposes
Even with the bare minimum of systems and relying on active sensors from another vessel, it is still slow enough that it is pretty much going to get hit when shot at by most weaponry at this tech level. Getting the techs to this level also eats up almost all of your starting RP for a standard start, leaving little for any other techs you may be wanting.
I noticed that you can build ship components separately from the ship. What is the point of doing this?
Faster construction.
This, to the extent that for larger ships it practically becomes neccesery if you want a ship to be built before it's tech is outdated.
CIWS are not something any sane person would want to use. Feasible or not, they're useless.
No they are extremely usefull as they let your commercial designs have point defence, as well as allowing you point defence without the need for active sensors if your sensor ship has been taken out, or if your sensors have insufficient range to pick up high speed missiles before they impact.