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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Drag Function question.
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<blockquote data-quote="JBM" data-source="post: 32253" data-attributes="member: 1969"><p><BLOCKQUOTE><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><HR>...then one solution is to mathematically account for increasing drag experienced by small arms projectiles as they slow and to permit the shooter to adjust the slope of the drag curve. That way, a single G1-based BC can be used and the shape of the curve can be tweaked to match actual performace of the bullet in question<HR></BLOCKQUOTE></p><p></p><p>Mathematically, there is no difference in using different BCs. It's also the same thing as using a different drag function (e.g. G6, G7) which is different. You can always convert the G1 BC to a G7 BC and then see how much difference there is -- there may not be that much and you can get away with one BC for the velocity range you're interested in.</p><p></p><p>As for discontinuities, the BC changes the acceleration of the bullet. That's two integrations away from the bullet position/drop. It won't give you a true discontinuity in either the position or velocity.</p></blockquote><p></p>
[QUOTE="JBM, post: 32253, member: 1969"] <BLOCKQUOTE><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><HR>...then one solution is to mathematically account for increasing drag experienced by small arms projectiles as they slow and to permit the shooter to adjust the slope of the drag curve. That way, a single G1-based BC can be used and the shape of the curve can be tweaked to match actual performace of the bullet in question<HR></BLOCKQUOTE> Mathematically, there is no difference in using different BCs. It's also the same thing as using a different drag function (e.g. G6, G7) which is different. You can always convert the G1 BC to a G7 BC and then see how much difference there is -- there may not be that much and you can get away with one BC for the velocity range you're interested in. As for discontinuities, the BC changes the acceleration of the bullet. That's two integrations away from the bullet position/drop. It won't give you a true discontinuity in either the position or velocity. [/QUOTE]
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Rifles, Bullets, Barrels & Ballistics
Drag Function question.
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