Basically, you place the center of the aircraft on a the first or second concentric ring, depending on how far away it is and it's angular velocity relative to your location. The center of the spider sight should be on a line extending forward from the nose of the aircraft, so that the aircraft appears to be flying toward the center point of the sight. As you fire, the bullets travel to a point in front of the aircraft. By the time the bullets get to that point in space, the aircraft will be at the point. Crash & burn. The hole at the end of the hook shapes rear sight should be lined up with the center of the forward spider sight.
Thanks a lot,DA!!! You just told everyone how to shoot down an airplane-the BATF should be at your door soon,along with Homeland Insecurity!! [Tell them Bil said HI,they will know which one you mean] ---bil
"I dream of a world where I can buy alcohol,tobacco and firearms from the same drive-up window,and use them all on the way home from work!" Dogbert