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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="Pdvdh" data-source="post: 1187681" data-attributes="member: 4191"><p>Timber338,</p><p>I hear you. In fact I previously shared this same interest in understanding coriolis, to the extent I researched quite extensively. The coincidental consequence was I reached the conclusion that the coriolis algorithms in my ballistic software were flawed. </p><p></p><p>I forwarded the reference articles I'd read to the owner/programmer of my ballistics software. After we exchange several e-mails, he concurred with my perspective and corrected the coriolis function in the software. But this is the point I wanted to communicate. The owner/programmer told me the article I'd forwarded was the best reference article he'd ever read on the subject. Based on my research experience, and further based on that comment from the owner of Patagonia Ballistics, I think it's unlikely you'll find any articles on the worldwide web that completely satisfy your curiosity and/or satisfactorily complete your understanding. </p><p></p><p>Based on my research, I believe the primary (if not sole) affect that angle fire has on the magnitude of coriolis drift is due to the changed time of bullet flight. Time of bullet flight is a function of angle of fire. The earth rotates while the bullet is in flight. The longer the bullet is in flight over the surface of the earth, the greater the magnitude of the vertical and horizontal components of coriolis. Based on this belief, I tentatively conclude that angle of fire is pertinent only to the extent that it affects/changes the time of bullet flight. Your ballistic software most likely calculates time of flight <em><strong>as affected by angle of fire</strong></em>. If the coriolis calculation includes that corrected time of flight (<em>corrected for angle of fire</em>), then the software <u><strong>IS</strong></u> correcting coriolis based on differing angles of fire. </p><p></p><p>That's my story, and I'm sticking to it,... until Bryan Litz puts me to shame with a more authoritative explanation. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p><p></p><p>Mr. Litz, where art thou? <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="Pdvdh, post: 1187681, member: 4191"] Timber338, I hear you. In fact I previously shared this same interest in understanding coriolis, to the extent I researched quite extensively. The coincidental consequence was I reached the conclusion that the coriolis algorithms in my ballistic software were flawed. I forwarded the reference articles I'd read to the owner/programmer of my ballistics software. After we exchange several e-mails, he concurred with my perspective and corrected the coriolis function in the software. But this is the point I wanted to communicate. The owner/programmer told me the article I'd forwarded was the best reference article he'd ever read on the subject. Based on my research experience, and further based on that comment from the owner of Patagonia Ballistics, I think it's unlikely you'll find any articles on the worldwide web that completely satisfy your curiosity and/or satisfactorily complete your understanding. Based on my research, I believe the primary (if not sole) affect that angle fire has on the magnitude of coriolis drift is due to the changed time of bullet flight. Time of bullet flight is a function of angle of fire. The earth rotates while the bullet is in flight. The longer the bullet is in flight over the surface of the earth, the greater the magnitude of the vertical and horizontal components of coriolis. Based on this belief, I tentatively conclude that angle of fire is pertinent only to the extent that it affects/changes the time of bullet flight. Your ballistic software most likely calculates time of flight [I][B]as affected by angle of fire[/B][/I]. If the coriolis calculation includes that corrected time of flight ([I]corrected for angle of fire[/I]), then the software [U][B]IS[/B][/U] correcting coriolis based on differing angles of fire. That's my story, and I'm sticking to it,... until Bryan Litz puts me to shame with a more authoritative explanation. :D Mr. Litz, where art thou? :) [/QUOTE]
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Question on Applied Ballistics App and Coriolis
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