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post #1 of 18 (permalink) Old 10-24-2011, 05:03 PM Thread Starter
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Kinetic Energy

Good comparison with different crossbows regarding kinetic energy. The crossbow I shot was the TenPoint Stealth which has 95.5 foot-pounds of kinetic energy. That is the low range of kinetic energy for the crossbows listed!

Although the only drawback I see for this particular bow is the price, it seems well suited for hunting. Nice and compact, quiet, fast, balanced, out of the box accuracy.


http://www.maximumhunting.com/produc...ow-comparison/

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post #2 of 18 (permalink) Old 10-24-2011, 05:50 PM
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Re: Kinetic Energy

How fast does the KE drop off with range compared to a compound bow with similar speed and arrow weight? Or is there no diff?

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post #3 of 18 (permalink) Old 10-24-2011, 05:58 PM Thread Starter
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Re: Kinetic Energy

Good question. The lighter the projectile, the quicker the energy will be lost. Also, the more surface area of the projectile, the quicker the energy will be lost due to drag forces.

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post #4 of 18 (permalink) Old 10-24-2011, 06:21 PM
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Re: Kinetic Energy

Here is a link: http://bowsite.com/bowsite/features/...tion/index.cfm You can figure your arrow's KE It also contains much other good information.
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post #5 of 18 (permalink) Old 10-24-2011, 07:07 PM
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Re: Kinetic Energy

[quote=Double Lung 20]Good question. The lighter the projectile, the quicker the energy will be lost. Also, the more surface area of the projectile, the quicker the energy will be lost due to drag forces.

I'm not sure I agree,but I'm no expert. The way it was once put to me is..if you shoot 2 different weight arrows,say a 350 grain and a 450 gr. out of the same 60 lb bow, both arrows being fletched and tiped the same,the 450 will bleed off energy quicker(hence the faster drop)than the 350. Also put to me , the longer the shaft,(wihtin reason ofcourse) the more room for stored energy. I'm not arguing with you but that makes sense,to me anyway

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post #6 of 18 (permalink) Old 10-24-2011, 07:39 PM Thread Starter
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Re: Kinetic Energy

That's not correct. The heavier arrow doesn't drop more because it loses energy faster. Both arrows will drop at the same rate, but the lighter arrow will impact higher than the heavier arrow because it reaches the target faster. The effect of gravity on an arrow has nothing to do with arrow weight. It has to do with the time between release and impact. Therefore, the arrow that travels slower will have more time to drop.

This also brings up the point of efficiency. There is a sweet spot between an ultra light arrow and a heavy arrow that will best transfer energy down range. A faster arrow does not mean it has more energy.

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post #7 of 18 (permalink) Old 10-24-2011, 08:35 PM
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Re: Kinetic Energy

Ok, thanks for clearing that up

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post #8 of 18 (permalink) Old 10-24-2011, 09:23 PM
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Re: Kinetic Energy

Quote:
Originally Posted by Double Lung 20
Although the only drawback I see for this particular bow is the price, it seems well suited for hunting. Nice and compact, quiet, fast, balanced, out of the box accuracy.
Been using the Stealth exclusively this year. A great bow for hunting.

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post #9 of 18 (permalink) Old 10-24-2011, 09:26 PM
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Re: Kinetic Energy

Quote:
Originally Posted by Double Lung 20
This also brings up the point of efficiency. There is a sweet spot between an ultra light arrow and a heavy arrow that will best transfer energy down range. A faster arrow does not mean it has more energy.
For that reason I tend to shoot heavier arrows. Plus heavier arrows tend to result in less vibration and noise during the shot.

I never bought into the speed craze with crossbows.

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post #10 of 18 (permalink) Old 10-24-2011, 09:59 PM Thread Starter
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Re: Kinetic Energy

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Originally Posted by dpms
Quote:
Originally Posted by Double Lung 20
Although the only drawback I see for this particular bow is the price, it seems well suited for hunting. Nice and compact, quiet, fast, balanced, out of the box accuracy.
Been using the Stealth exclusively this year. A great bow for hunting.
It surely isn't the fastest crossbow out there, but it's definitely the one I would consider buying right now. I am going to look at some other crossbows and see what my father likes best. Then we will probably purchase one here in the next year or so. We aren't looking for a super fast bow, but rather one that would be compact and quiet. Crossbows are tough to shoot behind a tree, so we want something that will allow us to have the optimal range of motion.

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