Comment Re:Laser gun.... who knows. Railgun though (Score 1) 185
At 5000mph, a projectile 100 miles out will have 66 seconds to respond. Closer in, far less. Still, for an enemy craft width of, say, 300 feet would need to move 150' to avoid collision. At 0.1g lateral acceleration, fairly trivial, you could move an H-4 Hercules out of the line of fire in just over 3 seconds. That's a 5 mile range for the largest (wingspan) plane in the world. And from 6 miles out, the EM signature from a rail gun would be pretty obvious. That's very practical if the target is equipped with an automatic avoidance system.
Now if the projectile is active it does make things more interesting.