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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
RPM/engraving vs. Terminal Ballistics
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<blockquote data-quote="dwm" data-source="post: 30369" data-attributes="member: 1136"><p>You may want to consider that rotation contributes to the overal energy of a bullet. I hadn't really thought about that until reading this thread, but it is true. </p><p></p><p>So far every discussion on bullet energy has been focus on forward velocity, IE:</p><p></p><p>Energy (translational)= 1/2 * mass * velocity * velocity</p><p></p><p>Well rotation also provides enegry:</p><p></p><p>Energy (rotational) = 1/2 * I * w * w </p><p></p><p>where I = momentent of inertia and w = angular velocity</p><p></p><p>The total energy = E(translation) + E(rotation)</p><p></p><p>So a faster spinning bullet does indeed have more energy than a slower spinning bullet.</p><p></p><p>I am sure that when a bullet impacts and starts to deform that some of the rotational energy is converted to heat and contributes to the deformation and tissue damage.</p><p></p><p>Something to think about. </p><p></p><p>Interesting that I have never seen this in anything that I have read on ballistics and energy.</p><p></p><p>I will provide references if anyone dislikes the equations I provided above. It is basic Vector Mechanics.</p></blockquote><p></p>
[QUOTE="dwm, post: 30369, member: 1136"] You may want to consider that rotation contributes to the overal energy of a bullet. I hadn't really thought about that until reading this thread, but it is true. So far every discussion on bullet energy has been focus on forward velocity, IE: Energy (translational)= 1/2 * mass * velocity * velocity Well rotation also provides enegry: Energy (rotational) = 1/2 * I * w * w where I = momentent of inertia and w = angular velocity The total energy = E(translation) + E(rotation) So a faster spinning bullet does indeed have more energy than a slower spinning bullet. I am sure that when a bullet impacts and starts to deform that some of the rotational energy is converted to heat and contributes to the deformation and tissue damage. Something to think about. Interesting that I have never seen this in anything that I have read on ballistics and energy. I will provide references if anyone dislikes the equations I provided above. It is basic Vector Mechanics. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
RPM/engraving vs. Terminal Ballistics
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