Originally posted by hitech
E25280: Gunns firing reward are more lethal at range, not do to the resone given above, but because they are travling at a slower rate threw the air at launch time, and hence less drag, hence they are travling faster at impact time.
Take the most extream case both planes are travling at 1000 fps and the bullet is shot straight back with a muzzle vel of 1000 fps.
Hence relative to the ground and air it is not moveing other than it is starting to fall.
Now 2 secs later the plane impacts the bullet at 1000fps, notice the bullet did not slow down at all relative to the trailing plane.
This is why reward guns of bombers seem more lethal.
HiTech
Love the "hovering bullet" analogy.
I admit, I did not consider drag. In an airless environment, I believe my rant still holds.
Using your extreme example, the planes must start 2000 feet apart for the plane behind to be hit in 2 seconds. So, assume the plane behind fires back. In an airless environment, his gun velocity of 1000fps has a "ground speed" of 2000 fps. In one second it crosses the "hovering bullet", but the target is now 1000ft away due to its speed. After second number two, the 2000fps bullet hits the target which is now 2000 feet from the original position. The impact is still at 1000 fps.
So I guess I need a physics lesson. I tend to think of deceleration as a time-dependent variable. Is deceleration due to drag purely dependent on distance traveled? That is, a bullet fired at 2000 feet per second decelerates more rapidly than a bullet fired at 1000 feet per second?
At real-life speeds and when talking about a spinning, aerodynamically designed projectile, is the difference in deceleration all that significant when time-to-target is less than a second?
That is to say, I understand (now) that there is
a difference. I still have a hard time believing that the difference could be
so great as to be a more determinant factor than those I cite (multiple guns firing at a relatively easy target at its most vulnerable part (engine)).
Waiting patiently for my smackdown . . .
Until then, as once stated on Mythbusters; "I reject your reality, and choose to substitute my own."