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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Vertical component of wind drift
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<blockquote data-quote="MAX" data-source="post: 26198" data-attributes="member: 184"><p>My nonexpert understanding of Robert McCoy's dissertation on the subject: For the .30 Ball at 2800 fps--.5"/10 mph rangewind at 600 yards. A minor concern I'd think.</p><p></p><p>I may not understand what he meant but my understanding is that he attributes vertical effect of crosswind to projectile jump, which I think is a result of gyroscopic precession as S1 said. I've had my head in the Rinker/Vaugh/McCoy trough for the last couple of months and I'll propably be catatonic and drooling anytime now. <img src="http://images/icons/rolleyes.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /> And all I wanted when I showed up here was to learn about long range shooting. <img src="http://images/icons/grin.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </p><p></p><p>Does anybody know how data is deduced or reduced from spark shadowgraph photos? I see no reference points.</p></blockquote><p></p>
[QUOTE="MAX, post: 26198, member: 184"] My nonexpert understanding of Robert McCoy's dissertation on the subject: For the .30 Ball at 2800 fps--.5"/10 mph rangewind at 600 yards. A minor concern I'd think. I may not understand what he meant but my understanding is that he attributes vertical effect of crosswind to projectile jump, which I think is a result of gyroscopic precession as S1 said. I've had my head in the Rinker/Vaugh/McCoy trough for the last couple of months and I'll propably be catatonic and drooling anytime now. [img]images/icons/rolleyes.gif[/img] And all I wanted when I showed up here was to learn about long range shooting. [img]images/icons/grin.gif[/img] Does anybody know how data is deduced or reduced from spark shadowgraph photos? I see no reference points. [/QUOTE]
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Vertical component of wind drift
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