Not professionally been learning and testing. No expert by any stretch, but Ive found engineering resources that have helped with cf types, epoxy types and additives, etc.Cool. Do you wrap barrels?
Not professionally been learning and testing. No expert by any stretch, but Ive found engineering resources that have helped with cf types, epoxy types and additives, etc.Cool. Do you wrap barrels?
BR shooters will cut new crowns every 2-300 rounds, set back chambers a half inch 1-2 times on a 32" barrel if it's a shooter. Can you do any of these functions with the short shank/muzzle on a carbon barrel? No. This alone is enough reason to steer a BR or F shooter away from CF. Oh and weight? Aren't this rifles in that's 20-40# range? Why would they use the lightest composite for contour on an intended heavy gun? Let's be real. If they had an option of a 12# barrel that shoots in the 2s, and a 4# CF that shoots in the 2s, they're gonna choose the 12# Barrel every day.I'll be the butt head!!
Show me a BR shooter that is consistantly shooting well with one and I will think about.
That is my yard stick for my decision.
JMHO
I've spoke with a few barrel manufacturers that are now building CF wrapped options, and they all agreed with this statement about thermal insulation with cf.Post a link courtesy of the army otherwise I highly doubt it. The thermal conductivity of carbon is significantly lower than steel. I've heard plenty of accounts of people burning out barrels quicker with CF wraps. I'm fairly certain the thin steel liner heats up way faster, the carbon does nothing, and they don't last as long as steel
Here are some weights posted by Bartlein about a year agoI wish more weights would be published. One can find weight calculators online but hard to find someone that will say exactly what said barrel will weigh.
Post a link courtesy of the army otherwise I highly doubt it. The thermal conductivity of carbon is significantly lower than steel. I've heard plenty of accounts of people burning out barrels quicker with CF wraps. I'm fairly certain the thin steel liner heats up way faster, the carbon does nothing, and they don't last as long as steel
I'm a mechanical engineer and I build rockets for a living my guy. Never seen a low thermal conductivity heat sink but go on ahead and act like citing a "classified" study is a legitimate reference. I think the claim with CF barrels cooling more efficiently or more quickly can both be true and misleading. The greater the temperature difference from atmospheric conditions the more "efficiently" something will cool down and the more "quickly" it will cool down. I'm sure you were thinking about Newton's law of cooling when you typed all this up.Do you really think the army material command produced "white sheets" on top secret technology???
I think maybe I would suggest you contact proof or bartlein on their heat conductivity studies or go back to college or work on it in an industrial environment on equipment or study mercedes white papers on their cf technology....
I would also suggest you study MORE THAN THERMAL CONDUCTIVITY as you can't currently see the forest for the trees.... your looking at it BACKWARDS AS YOU ARE A PESSEMIST....
Do you really think that the usa-britain-china and Russia ALL INVESTESTED BILLIONS into cf wrapped barrels because it was a failed technology that looked cool????
Maybe just maybe YOU OVERESTIMATE YOUR OWN LOGIC AND CAPABILITIES????
MIGHT NOT BE YOUR BAILEYWICK???
CF HAS BEEN BEING USED FOR 2 DECADES IN INDUSTRIAL APPLICATIONS TO REMOVE HEAT FROM FORMING PROCESSES WHILE RETAINING STRENGTH-LOWERING HARMONICS-DETERRING DEFLECTION ALL THE WHILE LOWERING MASS......
EXACTLY WHAT IT DOES WITH BARRELS....
B-b-b-b-because all the cool kids are doing it
Sweet! I'd love to pick your brain. Is thermal conductivity based on meterial thickness, weight or what? Having a hard time getting that part answered. In other words, if I have an inch of steel or an inch of steel, the TC is as listed? Also, we are assuming standard epoxy resin, not silver or graphite additives.I'm a mechanical engineer and I build rockets for a living my guy. Never seen a low thermal conductivity heat sink but go on ahead and act like citing a "classified" study is a legitimate reference. I think the claim with CF barrels cooling more efficiently or more quickly can both be true and misleading. The greater the temperature difference from atmospheric conditions the more "efficiently" something will cool down and the more "quickly" it will cool down. I'm sure you were thinking about Newton's law of cooling when you typed all this up.
I'll be the butt head!!
Show me a BR shooter that is consistantly shooting well with one and I will think about.
That is my yard stick for my decision.
JMHO
Well some body is wrong; not exactly sure who.
Have done a fair amount of reading on this subject and while it is true that carbon fibers can conduct an appreciable amount of heat, but to do so the strands have to be perpendicular to the surface that one wants to conduct heat away from. The heat has to propagate down the length of the strand. They can not wrap and or position the carbon fiber stands on a barrel 90 degrees or perpendicular (stand on end like short hairs) to the barrel or chamber of the rifle like they need to conduct heat away from the steel barrel.
The only way they can wrap the carbon fibers around a chamber or a barrel is longitudinally and then they encase them in a resin to bind them which further insulates the barrel. So you take a thin barrel which can't absorb much heat without getting extremely hot, and you wrap it in insulating resin and carbon fibers that are wound in the wrong direction for heat transfer. Tell me where that heat goes.. Unless you can ventilate the barrel by passing a cool fluid - air or liquid, there is no way to get the heat out of the thin steel barrel that is incased in the resin and longitudinally wrapped carbon fiber.
That they shoot well as many profess, is a credit to the maker of the steel barrel prior to its being wrapped.
And the fact that the outer surface of the carbon barrel is always cool to the touch lets you know the heat is not reaching the carbon surface nor radiating from it.