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Do Bullets Go To Sleep?
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<blockquote data-quote="aaronraad" data-source="post: 777996" data-attributes="member: 34119"><p>Straight up, what a fantasitic effort by the authors and researchers, especially considering the equipment employed. </p><p> </p><p>First question is with regard to the calibration process. I didn't identify at which distance the calibration was done. If calibration was done at all three distances (10, 160 & 320 feet), was the difference in readings between the three chronographs still within error limits? I say this, given the tendancy of optical chronographs to be light sensative; and the light might have changed with distance(position), let alone time of day and cloud conditions.</p><p> </p><p>Do you believe the spin, pitch & yaw paths to be truely circular or elipitcal as found more often in nature? If the path is more eliptical and prone to changing with velocity and distance might this impact the measured drag coeffcient each time. I'm assuming that the pitch and yaw act in combination to increase drag, but the combination would have a different effect if the pitch was at the major axis of the elipse and the yaw was only at the minor axis and vice-versa.</p><p> </p><p>Finally, were any chronographs harmed during the making of this report? <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="aaronraad, post: 777996, member: 34119"] Straight up, what a fantasitic effort by the authors and researchers, especially considering the equipment employed. First question is with regard to the calibration process. I didn't identify at which distance the calibration was done. If calibration was done at all three distances (10, 160 & 320 feet), was the difference in readings between the three chronographs still within error limits? I say this, given the tendancy of optical chronographs to be light sensative; and the light might have changed with distance(position), let alone time of day and cloud conditions. Do you believe the spin, pitch & yaw paths to be truely circular or elipitcal as found more often in nature? If the path is more eliptical and prone to changing with velocity and distance might this impact the measured drag coeffcient each time. I'm assuming that the pitch and yaw act in combination to increase drag, but the combination would have a different effect if the pitch was at the major axis of the elipse and the yaw was only at the minor axis and vice-versa. Finally, were any chronographs harmed during the making of this report? :) [/QUOTE]
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