
Originally Posted by
Landwalker
I think the radius of a projectile is the area within which it has an effect--notice that artillery units often have larger "radii", because when their ammunition hits it affects a larger area.
Obviously, with a "radius" of zero, your missile isn't going to be affecting very much. How it affects anything at all is still a bit confusing to me, but the result is that in many cases when the projectile should be striking a target, it isn't because of its lack of an area of effect.
Cheers.