The Down Range Forum
Member Section => Down Range Cafe => Topic started by: Big Frank on November 10, 2017, 10:54:52 PM
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A modern day Robin Hood with a Barrett .50 cal splits an arrow.
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He missed by a few thousandths.
Boat tail split...
Still better than I could do. My daughters boyfriend splits arrows pretty frequently with his bow. Not entirely on purpose at 10 or 12 bucks a pop..
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It would take me several tries to hit the arrow at all. The way the bullet pitches upward is amazing. I would expect maybe a little deflection but nothing like that. It sounds like he may give it another try.
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It would take me several tries to hit the arrow at all. The way the bullet pitches upward is amazing. I would expect maybe a little deflection but nothing like that. It sounds like he may give it another try.
It's amazing how easily bullets will change direction with minimal contact.
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It's amazing how easily bullets will change direction with minimal contact.
Yeah, I still can't believe that a bullet with that much mass and momentum would be deflected that far. I thought it would basically plow straight through the arrow and the backstop.
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I think if the arrow had been solid there would have been less deflection. That's carbon fiber and hollow tubes have unbelievable strength. It's an engineering thing...though I can't remember the exact strength of materials and force vector information...too old.
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I think if the arrow had been solid there would have been less deflection. That's carbon fiber and hollow tubes have unbelievable strength. It's an engineering thing...though I can't remember the exact strength of materials and force vector information...too old.
Yep.
That's why drive shafts and pylons are hollow tubes.......been a long time on the math terms.
Does the second-moment-of-area thing apply?? ;D ;D ;D ;D
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I don't think anything hollow is stronger than something solid, but it's much stronger for it's weight. Using a driveshaft as an example, if it was solid and say 3" in diameter, it would be strong but heavy. If it was solid and weighed as much as a hollow one, maybe it would be an inch or possibly less in diameter. That would be easier to bend than a 3" hollow one. A solid carbon fiber arrow should be stronger than a hollow one of the same diameter. A solid one weighing as little as a hollow one would be too skinny and unusable.
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I don't think anything hollow is stronger than something solid, but it's much stronger for it's weight. Using a driveshaft as an example, if it was solid and say 3" in diameter, it would be strong but heavy. If it was solid and weighed as much as a hollow one, maybe it would be an inch or possibly less in diameter. That would be easier to bend than a 3" hollow one. A solid carbon fiber arrow should be stronger than a hollow one of the same diameter. A solid one weighing as little as a hollow one would be too skinny and unusable.
Correct......and, I don't think anyone is saying that hollow tubes are stronger....... just more efficient, as in "strong enough to get the job done without having to spend a lot of money on excess materials if you used a solid" ..... which is exactly why drive shafts are hollow.
A hollow tube of the proper diameter, weight and wall thickness is "strong enough" to take the place of a solid tube....even if the solid is stronger at a smaller diameter, it would be heavier than the larger hollow tube. It's a balancing act of engineering.
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http://www.fourwheeler.com/how-to/1101or-steel-tubing-myth-of-the-tube/