You’re confusing bearing with heading. Just because you know his heading doesn’t mean anything with regard to his bearing to you, which is his compass position relative to you. You can be on a reciprocal heading to him, but if your flight path is displaced 50 meters from his, then you won’t collide.
So this will not work without some way of determing bearing of the approaching aircraft. Radar would do it, but I don’t know of any sets that small. A video camera with built-in compass would do it, but I’ve never seen such a thing.
I’m not sure it’s so easy. Yet . . .
“You’re confusing bearing with heading.”
Thanks for your comment.
This is an important distinction, but I think if you look through my responses to other comments you will see that I do, in fact, clearly distinguish between the bearing of an approaching target aircraft relative to an attack drone on the one hand and the heading of the incoming aircraft following a predictable heading on an instrument approach.
As I discussed in a previous comment their are on-board video cameras that can permit a drone operator to observe the bearing of the target aircraft adjust the position of the drone at the last minute to increase the probability of a collision.
In fact, I believe that the drone in the JFK Landing Approach Kill Zone (LAKZ) and also the unidentified airframe in the Glasgow LAKZ were most likely operated by terrorists attempting to strike airliners, in effect by “mining” the LAKZ.
Use of swarms of inexpensive UAVs, especially mini-copters, could greatly increase the probability of a successful strike.