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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Why use a carbon wrapped barel?
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<blockquote data-quote="tacomHQ" data-source="post: 2071879" data-attributes="member: 67159"><p>Thank you for the question: this is not combative in the least.</p><p>Setting the stage:</p><p>.338cal x 30L x 1.45dia has 394% greater surface area on our barrels than its equivalent weight 1.1" diameter solid barrel. It is also at least 56% stiffer plus the "vibration" is specifically directional- the direction we want it to move. </p><p>The airflow event takes place during firing in two stages:</p><p></p><p>1) At ignition and bullet travel down the barrel a column of air (bore diameter/column) is moving out of the muzzle at 3100fps (I shoot a 33XC 285A-tip) that movement thru the muzzle creates a low pressure zone.</p><p>The barrels have ports at the rear of the channels. The low pressure zone presented at the muzzle end pulls air thru the channels at a fairly high velocity. High velocity air typically runs cooler than ambient (venturi). The velocity is so high that we have found 8 little piles of dust/debris impacted on the back of brakes during a shooting event.</p><p>2) As the bullet leaves an overpressure occurs pushing air back down the channels. You will see "wisp" of powder smoke curl out of the ports during a shooting event. </p><p></p><p>Therefore air is changed twice during one round. </p><p></p><p>We also calculate the areas of the webbing to be as "thin" as reasonably possible. I don't believe heat transfer is totally linear and increases as the mass decreases- or in the simple example thickness. A 1/4" thick piece will accept heat and transfer it differently than a 1/8" pc and certainly different than a .04" piece. Radiators. The surface area is increasing faster than the mass is decreasing as a ratio. Simplistically speaking. Inversely surface area reduces at a cube+ versus increase in mass as things get big (Simplistically). Elephants. </p><p></p><p>Our barrels run cooler - fact.</p><p>They are giant heat sinks- fact.</p><p>Air moves thru the interior- fact. Solution to pollution is dilution- Or heat in this case. </p><p>The chamber runs cooler than the barrel- fact. The heat sink is in front of the chamber. Energy wants balance. </p><p>Multiple third parties are noting an increased barrel life. </p><p>Our barrels will rise in temp for a minute or two after a typical long string and then start cooling. They will reach ambient in a fraction of the time a standard barrel does. </p><p>On a typical 65-70 degree day shooting our 300 Norma under normal "range day" fun- it won't heat up for tens of rounds- if at all. Our .375 Cheytac after 15 rounds on a stage can be picked up by the barrel. Most likely is already going down in temperature by the time you get back to your staging area.</p></blockquote><p></p>
[QUOTE="tacomHQ, post: 2071879, member: 67159"] Thank you for the question: this is not combative in the least. Setting the stage: .338cal x 30L x 1.45dia has 394% greater surface area on our barrels than its equivalent weight 1.1" diameter solid barrel. It is also at least 56% stiffer plus the "vibration" is specifically directional- the direction we want it to move. The airflow event takes place during firing in two stages: 1) At ignition and bullet travel down the barrel a column of air (bore diameter/column) is moving out of the muzzle at 3100fps (I shoot a 33XC 285A-tip) that movement thru the muzzle creates a low pressure zone. The barrels have ports at the rear of the channels. The low pressure zone presented at the muzzle end pulls air thru the channels at a fairly high velocity. High velocity air typically runs cooler than ambient (venturi). The velocity is so high that we have found 8 little piles of dust/debris impacted on the back of brakes during a shooting event. 2) As the bullet leaves an overpressure occurs pushing air back down the channels. You will see "wisp" of powder smoke curl out of the ports during a shooting event. Therefore air is changed twice during one round. We also calculate the areas of the webbing to be as "thin" as reasonably possible. I don't believe heat transfer is totally linear and increases as the mass decreases- or in the simple example thickness. A 1/4" thick piece will accept heat and transfer it differently than a 1/8" pc and certainly different than a .04" piece. Radiators. The surface area is increasing faster than the mass is decreasing as a ratio. Simplistically speaking. Inversely surface area reduces at a cube+ versus increase in mass as things get big (Simplistically). Elephants. Our barrels run cooler - fact. They are giant heat sinks- fact. Air moves thru the interior- fact. Solution to pollution is dilution- Or heat in this case. The chamber runs cooler than the barrel- fact. The heat sink is in front of the chamber. Energy wants balance. Multiple third parties are noting an increased barrel life. Our barrels will rise in temp for a minute or two after a typical long string and then start cooling. They will reach ambient in a fraction of the time a standard barrel does. On a typical 65-70 degree day shooting our 300 Norma under normal "range day" fun- it won't heat up for tens of rounds- if at all. Our .375 Cheytac after 15 rounds on a stage can be picked up by the barrel. Most likely is already going down in temperature by the time you get back to your staging area. [/QUOTE]
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Why use a carbon wrapped barel?
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