GarethL said:
Also, it seems like the long-range missile should have, well, a longer range? I appreciate that they are more reliable at long ranges (not losing missiles from salvos over time), but it still seems odd - especially as the distant range band is now capped at 300,000km (see pg. 24),
300,000km is simply the longest
practical range for a weapon. Missile have their own targeting system (the Smart trait). They don't use the ships. It doesn't matter how far away the ship is, as the ship isn't helping at all, it just fired the missile. Everything the missile is using to target the enemy ship is on board the missile itself. Fire control software adds to the gunners check, but the gunner isn't the one making the check. The distance from the firing ship shouldn't have anything to do with it (other than detecting the target ship in the first place)
Effectively, they do have a longer range. Standard missiles are Thrust 10 with 60 minutes (10 rounds) of fuel*. That means a total of 100 Thrust over the course of the missile flight. Long Range missiles instead have Thrust 15, giving a total of 150 Thrust over that same period of time. Greater acceleration = faster top speed = more distance covered in that time.
Assuming constant acceleration at maximum burn (also assuming my math is correct), a standard missile could travel 326,000 km in that time. The long range missile would travel 486,000km in the same amount of time.**
*At least according to the Core Rulebook. High Guard makes no mention of missile fuel as far as I know, and the missile flight time table would seem to indicate otherwise.
**That would actually be wrong, as the formula I used assumes you turn around an slow down half way there. Actual distances would be longer, but the end result would be the same - long range missiles cover a larger distance so do in fact have a longer range.