The Coriolis Effect Explained... Kind Of

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Who is Ron Spomer
For 44 years I’ve had the good fortune to photograph and write about my passion – the outdoor life. Wild creatures and wild places have always stirred me – from the first flushing pheasant that frightened me out of my socks in grandpa’s cornfield to the last whitetail that dismissed me with a wag of its tail. In my attempts to connect with this natural wonder, to become an integral part of our ecosystem and capture a bit of its mystery, I’ve photographed, hiked, hunted, birded, and fished across much of this planet. I've seen the beauty that everyone should see, survived adventures that everyone should experience. I may not have climbed the highest mountains, canoed the wildest rivers, caught the largest fish or shot the biggest bucks, but I’ve tried. Perhaps you have, too. And that’s the essential thing. Being out there, an active participant in our outdoor world.

Disclaimer
All loading, handloading, gunsmithing, shooting and associated activities and demonstrations depicted in our videos are conducted by trained, certified, professional gun handlers, instructors, and shooters for instructional and entertainment purposes only with emphasis on safety and responsible gun handling. Always check at least 3 industry handloading manuals for handloading data, 2 or 3 online ballistic calculators for ballistic data. Do not modify any cartridge or firearm beyond what the manufacturer recommends. Do not attempt to duplicate, mimic, or replicate anything you see in our videos. Firearms, ammunition, and constituent parts can be extremely dangerous if not used safely.

#shorts #hunting #podcast

[HA]

And that’s why I missed that buck at 50 yards!

[kevinroberts]

You are driving the flat earthers crazy.😂😅

[smorgasbord-riogrande]

At the equator, if you jump high enough, you’ll land in your Western neighbors yard.

[cargotoolshop]

Yeah, at my 300 yard 308, 30-06 and my 190 yard 350 legend said it doesn't care

[glenj.taylor]

Fascinating stuff Sir.
I would figure N/S shots would have an opposite direction of movement or at least a different distance of movement.
Just guessing but given consistent conditions, shouldn't Spindrift should be consistent regardless of direction?

[trevorkolmatycki]

Best way to predict how much this affects your shooting is to get a good ballistics solver app on your phone and model in your rifle and ammo and run the solution with and without coriolis effects. In the northern hemisphere coriolis drifts bullets right which adds to the right spin drift… for hunting it’s not much, but it’s not nothing. To account for these effects (up here at 54.3deg latitude) I simply set my scope 1 click left (1/4 moa) after sighting in. Or just sight in approx. ¼” left at 100yd. Then I ignore the vertical component of the eotvos effect because it is too onerous to calculate in the field and too small to worry about in a hunting rifle.

[laurogarza]

This is correct and although the coriolis effect can be measured or illustrated within a small distance, the fact remains that the bullet's "flight" is quite brief, a portion of a second, which results in a very small amount of coriolis effect or movement of the target in relation to the position it had when it was fired upon. The difference is nearly negligible.

[wintonhudelson]

With my unsteadiness, I couldn't flock-shoot a corralled herd of water buffalo at a thousand yards.

[IHWKR]

No matter if you're looking north or south the bullet is traveling easterly. It's just an illusion that when you are shooting south that the bullet is going to the right because the southerly target is moving at a higher rate of speed than you are.

[trevorkolmatycki]

Before you shoot east or west remember that both the bullet and the target are travelling at the same speed in the same direction due to earth rotation. Hence the target is NOT rotating away from you to the east or towards you from the west… the shooter and the target are rotating around the earth together, same speed, same direction. The bullet, when launched, still has the same earth rotation direction and speed plus the imparted muzzle velocity. So the difference in speeds between the target and bullet is always equal to the retained velocity of the bullet. Unfortunately, the technically incorrect explanation of target roating up from the west and down to the east dominates the conversation in the shooting community because it can be physically visualized in our minds with reference to spacial reality… so we cling to it… And I suppose that’s ok… if it helps you to remember that shooting east you will hit high and west you will hit low.
But… for us nerds the technically accurate explanation is referred to as the Eötvös effect.
When shooting East, the net bullet velocity is earth rotation plus bullet velocity. This net velocity increase produces a small increase in the centrifugal force acting on the bullet from planet rotation which nets out as a slight decrease in net gravitational force so your bullet drops less than expected and thus hits higher than expected. Shoot west and the bullet velocity subtracts from rotation which produces an increase in net force due to gravity so your bullet drops more than expected and thus hits lower than expected.
Taking this to the extreme: If you could launch a projectile due East with sufficient velocity for the centrifugal force to exceed gravity for sufficient duration, you could send that projectile into orbit.

[carlericvonkleistiii]

Oh no! My flat earth theory just broke!😂

[bubbawatson]

So this only works with bullets?
Not golf shots, field goals helicopter, drones.
I've never seen it move watching my golf drive 6 seconds in air

[hobbyhermit]

So, at what distance is this noticeable?

[NightSniper]

moving to the right only in the northern hemisphere. The earths rotation speed is 1525 FPS. so if you are shooting to the east it will high. Shooting west will deviate the shot low.

[leroy]

You are taking very long shots. Artillery needs to adjust fire because of this more than your average shooter.

[P-M-]

But the round is fast so it should be very minor at normal shooting ranges.

[bubbawatson]

Airplane goes 750.
It's spinning 1, 067.
U wouldn't even reach your destination west to east, might as well go other way into spin.

[timg]

Ron is not wrong and what he says is accurate. However this really only affects shots over 1000 yards and even then barely so.
Variable Wind speed/direction between rifle and target, temperature and elevation have far more influence in the bullets trajectory than rotation of the earth.

[danielmaine]

And for those of us that shoot less than a mile this really doesn't matter.🤣🤣🤣🤣

[Dalesarty]

Its of none concern Ron. Neat topic to talk about but for the distance game is shot at it really has no effect.