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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Question on Applied Ballistics App and Coriolis
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<blockquote data-quote="KYpatriot" data-source="post: 1188009" data-attributes="member: 48028"><p>I agree with your equator shot description, there is n horizontal coriolis along the equator (which is why hurricanes cannot form there) but on the northern one I dont believe there is a gravitational effect to horizontal coriolis, coriolis in the horizontal is purely due to the geometry of a rotating sphere. I think you are veering into the eotvos effect, which some people also call "vertical" Coriolis, which is gravitational, and a the force of gravity on a projectile chamges as result of going "with" or "against" the earths rotation. The extreme example is a projectile fired with "escape" velocity; gravity has been offset completely. </p><p></p><p>By the way, that top path in red is very close to an illustration of a "great circle" route, the true shortest distance between two points on a sphere. Aircraft, being steerable, can and should take advantage of that and fly a curved path to their "target" to save fuel and time. Their trajectories are measured in hundreds or thousands of miles instead of yards so it actually makes a difference. Dont ask me to do the math but a great circle route, bending the tractory toward a pole instead of a straight line, over a thousand yard line of sight would probably only save a few inches.</p></blockquote><p></p>
[QUOTE="KYpatriot, post: 1188009, member: 48028"] I agree with your equator shot description, there is n horizontal coriolis along the equator (which is why hurricanes cannot form there) but on the northern one I dont believe there is a gravitational effect to horizontal coriolis, coriolis in the horizontal is purely due to the geometry of a rotating sphere. I think you are veering into the eotvos effect, which some people also call "vertical" Coriolis, which is gravitational, and a the force of gravity on a projectile chamges as result of going "with" or "against" the earths rotation. The extreme example is a projectile fired with "escape" velocity; gravity has been offset completely. By the way, that top path in red is very close to an illustration of a "great circle" route, the true shortest distance between two points on a sphere. Aircraft, being steerable, can and should take advantage of that and fly a curved path to their "target" to save fuel and time. Their trajectories are measured in hundreds or thousands of miles instead of yards so it actually makes a difference. Dont ask me to do the math but a great circle route, bending the tractory toward a pole instead of a straight line, over a thousand yard line of sight would probably only save a few inches. [/QUOTE]
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Question on Applied Ballistics App and Coriolis
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