Coriolis effect???

30378wbymag said:
Well Think of it this way, you and your target are stationary objects on a spinning ball. Both are constant and not moving. Now when you shoot, the bullet is "in flight" AS the ball keeps spinning. On VERY long shots as you can imagine that fraction of a second in "flight time" is enough to measure the distance the ball rotated "underneath" the flying bullet... Make a little sense?
Click to expand...

Thanks guys. It's like there needs to be a long range for beginners forum.
 
It is a factor at ELR shooting. Just plug in all the info into a good ballistics app and it will calculate it for you.

Yes it can be a factor, just use an app and let it do all the work. As long as, the data going in is good, the data coming out will be good
 
Coriolis effect in the horizontal plane Is the same irrespective of the direction of fire and in the northern hemisphere it is always right so correct left. In the vertical plane you take the cosine of the azimuth and multiply it by the 90° correction. This accounts for elevation correction due to east or west shots. East will have you high and west will have you low. The main factors are latitude, direction of fire and time of flight that will determine the needed correction. For me I like to correct for as much as I can so I will have a precise point of aim and that allows me to center my cone of fire as best as possible.
 
So... this is how my little brain had to think of it - maybe this will simplify the concept (or maybe make it more complicated). It's not just that the target is moving and thus is in a different spot than it was when the bullet left the muzzle (because the muzzle, and thus the bullet is moving also), but that the muzzle and the target are moving at different speeds. At the equator, or at least at the greatest circumference vertical to the axis of rotation, the surface of the earth is moving at about 1038 mph or a little over 1522 feet/sec. As you move away from the equator, the circumference vertical to the rotational axis becomes smaller, so the distance traveled in 24 hours becomes less - consequently, the surface speed is less. If you are shooting south to north (in the northern hemisphere), the west to east (left to right) speed of the muzzle, and hence of the bullet leaving that muzzle is greater than the west to east speed of the target, so the bullet ends up right of the target (although not by much, as stated earlier). If shooting north to south, the target is moving west to east (right to left) faster than the muzzle, so the target moves farther during the flight time, and the bullet still ends up right of the target. But until I shoot a heck of a lot better than I do now, I don't think I will need to waste time calculating surface speed differentials!!
 
PNWdude67 said:
Love what Revic is doing and combining technology... however for hunting it's a no go in Oregon... what states allow electronic range and ballistic calculators to be mounted on the rifle system? I can always check google too I suppose for the other states I hunt.
Click to expand...
They don't have to mounted on the rifle to be illegal in Oregon. The Sig BDX system is illegal for hunting in Oregon. Components of the system can be used but not the complete system used together.
 
jfolanddvm said:
So... this is how my little brain had to think of it - maybe this will simplify the concept (or maybe make it more complicated). It's not just that the target is moving and thus is in a different spot than it was when the bullet left the muzzle (because the muzzle, and thus the bullet is moving also), but that the muzzle and the target are moving at different speeds. At the equator, or at least at the greatest circumference vertical to the axis of rotation, the surface of the earth is moving at about 1038 mph or a little over 1522 feet/sec. As you move away from the equator, the circumference vertical to the rotational axis becomes smaller, so the distance traveled in 24 hours becomes less - consequently, the surface speed is less. If you are shooting south to north (in the northern hemisphere), the west to east (left to right) speed of the muzzle, and hence of the bullet leaving that muzzle is greater than the west to east speed of the target, so the bullet ends up right of the target (although not by much, as stated earlier). If shooting north to south, the target is moving west to east (right to left) faster than the muzzle, so the target moves farther during the flight time, and the bullet still ends up right of the target. But until I shoot a heck of a lot better than I do now, I don't think I will need to waste time calculating surface speed differentials!!
Click to expand...
AMEN
 
WalksLikeADeer said:
They don't have to mounted on the rifle to be illegal in Oregon. The Sig BDX system is illegal for hunting in Oregon. Components of the system can be used but not the complete system used together.
Click to expand...

True, and it's the "BDX component" ("scope") mounted to the rifle receiving a signal from the LRF that makes it illegal correct?

(For clarification of those unaware of exactly what we are discussing here's the ODFW the regulation change hilited in the 2019 PDF)

"it is unlawful to hunt game mammals with:
•infrared, night vision, laser, or any other sight that projects a beam to the target, including scopes with electronic rangefinders and scopes that receive information from any electronic device."

Key words:
"sight" and "scopes" which are generally mounted to the weapon system.
 
jfolanddvm said it pretty good! It does get more interesting if you are in South America or North Alaska and you have a counter clockwise/ left twist barrel also The mirage will play funny tricks on you too in the heat of the day!
 
PNWdude67 said:
True, and it's the "BDX component" ("scope") mounted to the rifle receiving a signal from the LRF that makes it illegal correct?

(For clarification of those unaware of exactly what we are discussing here's the ODFW the regulation change hilited in the 2019 PDF)

"it is unlawful to hunt game mammals with:
•infrared, night vision, laser, or any other sight that projects a beam to the target, including scopes with electronic rangefinders and scopes that receive information from any electronic device."

Key words:
"sight" and "scopes" which are generally mounted to the weapon system.
Click to expand...
So that includes a rangefinder independent of a scope? Does one just guess their archery shots?
Not that I'll every go back to Oregon. I escorted a buddy back to his family in Portland...hung out for a few days by myself and gotta say...not a fan.
 
Warning! This thread is more than 5 years ago old.
It's likely that no further discussion is required, in which case we recommend starting a new thread. If however you feel your response is required you can still do so.

Similar threads

W
Coriolis effect????
Replies
7
Views
3K
Greyfox
Greyfox
R
Coriolis effect?
Replies
7
Views
2K
Scrubbit
S
J
Coriolis Effect Questions
2
Replies
17
Views
7K
justgoto
J
Snowbird
Coriolis Effect half value?
2
Replies
20
Views
3K
BallisticsGuy
B
R
spin drift & Coriolis effect
2 3
Replies
41
Views
26K
deadidarren
deadidarren

Recent Posts

Top