Problem is I don't have a life besides ballistics!! [img]/ubbthreads/images/graemlins/tongue.gif[/img] [img]/ubbthreads/images/graemlins/tongue.gif[/img]
But if interested in LRH, then start to take a look at Coriolis past 600 yards, it's real, it's there and will make a notice of itself, you like it or not.
And before one makes commentaries about how come that the ballistics prediction made by a computer program do not match field results, or the wind, or whatever suits you best, consider Coriolis and think again.
Of course, this is important if someone is into really LONG RANGE. Otherwise, we can have a nice, normal life! [img]/ubbthreads/images/graemlins/grin.gif[/img] [img]/ubbthreads/images/graemlins/grin.gif[/img]
The comment "according to the hemisphere the gun is in.." has me thinking (not qualatative just quantatative).
What about shots across the equator?? Is there essentially zero coriolis effect for a shot due north or south when shooting to identical latitudes across the equator?? 120 mile shot (big rifle) 01 North to 01 South.
I'm sitting here reading this and wondering if I am smart enough to even shoot a gun. [img]/ubbthreads/images/graemlins/smile.gif[/img] I thought the coriolis effect was the (urban legend) reason why the water in the bathtub swirled when you let the drain out.
Genises 27-3: Now therefore take, I pray thee, thy weapons, thy quiver and thy bow, and go out to the field, and take me some venison...
First of all, we must separate the Coriolis drift into its two components. Both factors in the latitude. It's a fact that at the equator ( ideally since the earth is a geoid ) or nearby, the horizontal deflection, then the vertical will show values near to be negligible, but again, that depends on MV and range...consequently firing across the equatorial line will not modify at all the basic premise of the effects on the trajectory yielded by the Coriolis acceleration.
As Brown Dog said, this drift could be cancelled by other factors, like wind. But the sole notion of an arithmetic cancellation is not a good excuse to not account for it...
If it's good or not to compute it in "isolation" my opinion is YES.
Why? because the shooter can ( and must ) take the decision to make or not corrections based on current calculated drifts and environmental conditions. Like in good ol' artillery.
We must bare in mind that we are talking LONG RANGE... [img]/ubbthreads/images/graemlins/blush.gif[/img]
In a large, long, north south aligned, estuary such as the Chesapeake Bay the difference in density between salt water and fresh water will cause a lateral separation of the denser salt water from the lighter fresh water caused by the coriolis force. This is in additional to the normal vertical stratification. This is very important to know if you are trying to reduce pollution and its effects. It is also important in predicting behavior of certain fish and shellfish.