Do Friend-Or-Foe Missiles target neutrals or npcs

Out of all the Electronic Warfare modules, the Target Painter is the only one that really works on NPCs, since it just increases their signature.

The others do have a slight chance to work on rats but NPCs have a tendency to cheat when it comes to EW, so it's usually not worth it.

You are incorrect on one point. If sig radius is equal to or grater than your explosion radius you do 100% of the damage. If it is smaller it is reduced.

This means that any sig radius above the explosion radius is doing you no good.

The actual formula is:

Damage = Base_Damage * MIN(MIN(sig/Er,1) , (Ev/Er * sig/vel)^(log(drf) / log(5.5)) )

Where sig = ship's signature vel = ship's velocity Er = Explosion Radius of missile Ev = Explosion Velocity of missile drf = Damage Reduction Factor of missile

The log function is the natural logarithm, to the base e, often denoted as ln.

The 5.5 in the equation is the hidden missile attribute "oaeDamageReductionSensitivity" which you can see in the QR SQL data dump (can also see it in tools like EVEmon).

Reference