Rich S. wrote:

Aiming
point
. ----- ME-109

B-17
|
V


The gunner cannot hit the ME-109 given those relative positions
and trajectories no matter where he aims.

If the gunner fires straight back when he is at the aiming point
(e.g. re-lable 'aiming point' to be 'firing point' then the bullet
will drop straight down from that point, right?

Then if the ME-109 is close enough and fast enough the bullet
will be just below the aiming/firing point when the ME-109
gets there and will hit the bullet. Your specified range
of 50 yards (50 yards to the right in this case) is close
enough for normal ME=109 speeds.

If the Me-109 is slower or farther it will pass over the
bullet unless it is also at sufficiently lower altitude.

--

FF