Posted on 12/02/2019 5:17:30 AM PST by w1n1
Hold high to the West and hold low to the East, got it.(sarc.)
The calculation you cite assumes the shot being fired and the earth rotation being independent of the trajectory. Not the case. Drive down the highway and toss a tennis ball up 6” and catch it. The ball traveled about 30 yards.
I would think the centrifugal affect of the earths rotation would be more relevant. But with a 3 to 5 second flight time max, the impact would likely be irrelevant and/or too small to calculate considering the effects of wind, elevation, spin drift, temperature variations, altitude, humidity levels, etc.
The longer a projectile, any projectile, is in the air, the more likely planetary rotation comes into play. Field Artillerymen and mortar gunners understand this with “high angle” fire, where you are positioning your firing tube at angles above 45 degrees (800 mils) elevation. (usually to fire over an obstacle, such as a hill or mountain.
As time of flight increases, the more the movement of the Earth during flight impacts where your round will strike. Non-guided weapons have to aim where the target will be, so manufacturers provide tables that allow fire direction centers to account for planetary movement during flight over given ranges and times of flight. Additionally, we also have to account for wind speed, temperture, air pressure, target elevation differences, and other factors to hit something from far away.
The effect is real, and has been understood for decades by those of us who throw projectiles through the air for a living.
George Costanza: It’s simple physics. Calculate the velocity, V, in relation to the trajectory, T, in which G, gravity, of course, remains a constant. Unless you’re the AM Shooter blogger, in which case you can plagiarize anything you like and slap it on your blog.
Also remember that every atom in your thumbnail could be an entire universe.
600 yard one shot hits aren’t that hard. Somewhere around 850 is where it starts to be difficult.
The various long range shooting apps do have a correction for coriolis effect, so it exists. Wind is a far greater factor.
I’m not into long range shooting, but I can admire it.
My very best shot ever was about 18 months ago.
I shot a cotton mouth water moccasin through the head at 40 yards, in the dark (~11PM), with my daughter illuminating it with a 2 AA cell flashlight and it was the very first shot.
I’ll never be able to duplicate that shot again, because that was just pure luck.
I think the hardest part would be getting your target to line up exactly east or exactly west! north or south a few degrees would change the calculations.
If a stationary target is moving then so is the shooter.
The Coriolis effect is much so small at those distances to make any difference.
What is described in the shooting east and west sounds more like simply the earth’s rotation, but that doesn’t factor in gravity which is going to be a much more significant factor than the earth’s rotation or the Coriolis Effect.
This explains perfectly why I’m dead-on at 999 yds, and miss the whole danged target at 1,001!
/sarc off
I just thought it was a case of 1,000 yd yips
Arth rotates at 15.04 degrees per hour.
Arth = Earth
If a stationary target is moving then so is the shooter.
Scotty : That’s what I’m talking about! How do you think I wound up here? Had a little debate with my instructor on relativistic physics and how it pertains to subspace travel. He seemed to think that the range of transporting something like a... like a grapefruit was limited to about 100 miles. I told him that I could not only beam a grapefruit from one planet to the adjacent planet in the same system - which is easy, by the way - I could do it with a life form. So, I tested it out on Admiral Archer’s prized beagle.
James T. Kirk : Wait, I know that dog. What happened to it?
Scotty : I’ll tell you when it reappears. Ahem. I don’t know, I do feel guilty about that.
Scotty : Except, the thing is, even if I believed you, right, where you’re from, what I’ve done - which I don’t, by the way - you’re still talking about beaming aboard the Enterprise while she’s traveling faster than light, without a proper receiving pad.
Scotty : [to Keenser] Get off there! It’s not a climbing frame!
Scotty : [back to Spock Prime] The notion of transwarp beaming is like trying to hit a bullet with a smaller bullet whilst wearing a blindfold, riding a horse.
[Spock writes on a paper]
Scotty : What’s that?
Spock Prime : Your equation for achieving transwarp beaming.
Scotty : [to himself] He’s out of it
Scotty : [reads the equation] Imagine that! It never occurred to me to think of SPACE as the thing that was moving!
Interesting parallel, don’t you think?
“good thing to know”
It’s only half of the story. When shooting North and South, the target also moves. It stays level, but it moves West when you’re shooting South, and it moves East when you’re shooting North.
I should have said the “grouping”, not the”target”.
North?
South?
Unfortunately for Bill Buckner, Fenway Park’s first base is located WEST of home plate.
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