I'm new to the rules (just bought them 2 days ago) and new to scifi-naval gaming as well, but I'm currently working on this. The process in general will be:
1. Organize all the stats from the old WEG Star Wars series, which is the only comprehensive source of game stats that I know of, despite its idiosyncratic format.
2. Try to normalize all that data - WEG was not very systematic about applying similar stats to similar weapon systems, etc.
3. Try to fit this data into a Starmada design.
So far, I have the weapons systems organized, and have worked out generic stats for the primary weapon systems: Turbolasers, Ion Cannons, Laser Cannons, and Concussion Missiles. Given the extremely high numbers of these weapons on the typical Star Wars ship (even the lowly Nebulon-B Frigate has 12 Turbolasers and 12 Laser Cannons), I'm currently trying to use 10 weapon mounts = 1 Starmada weapon mount, or possibly use the ROF to tweak that ratio.
Here's what I'm working with so far:
Turbolasers: Rng 12, To Hit 4, ROF 1, Pen 3, Dmg 3, Inverted Range Mods (140.40)
Ion Cannons: Rng 6, To Hit 5, ROF 1, Pen 1, Dmg 2, Ignores Shields, No Hull Dmg (14.00)
Laser Cannons: Rng 3, To Hit 4, ROF 1, Pen 2, Dmg 2, No Range Mods, Repeating (34.56)
Concussion Missiles: Rng 3, To Hit 4, ROF 1, Pen 1, Dmg 3, Must Re-roll To Hit, Variable Dmg (7.65)
I don't know how much sense these make in gameplay terms, but the general idea is the Turbolasers are for long distance work versus capital ships and not as good in close, while the Laser Cannons are for close defense work, especially against starfighters. Ion Cannons ignore shields but don't cause physical damage, while Concussion Missiles are erratic but potentially powerful (I may add Must Re-roll Pen to them as they are ballistic rather than energy weapons).
Another problem is that most of the canon designs don't make a lot of gameplay sense, i.e. the Star Destroyers have immense Turbolaser batteries but no Laser Cannons.
The Tractor Beam can also be used as a weapon in the Star Wars universe, but I have no idea how to model that in Starmada terms.
Feedback welcome!
Cheers,
Christopher
PS - I'm using the Shipyard program - looks great!