My daughter won a 3 pack of these and they are a interesting idea. They have a tip like a regular broad head but the side blades are 1 big circular blade like a pizza cutter. They say it is suppose to role past bone for deeper penetration. Anyone use these?
Archery
Blood therapy broadheads
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Yours might weigh more, but mine are flying a heck of a lot faster.
I could quote your whole reply, but this one you really hammered the nail home. You should read that book you have.
Someone please tell me how something circular can spin through an object having equal forces working on all the cutting surface.
If it hits a bone on one side it could roll the blade but tell me what that's doing for you? looks to be more a change in arrow path.
See all these tests people do, it's on all static objects. Sheep head, i'd put those tips for sale and hopefully find someone naive enough to buy em.
I have my old physics book if you care to answer your own questions.
A rotating blade will have less friction between surfaces, thus requiring less force (draw weight OR broadhead weight) to provide the same amount of impact as something equally weighted, in theory. A simple concept, but back to my original question I'm wondering if anyone has any field experience with these tips to support the theory behind them.
You're not being an a-hole, you just have too much time on your hands and like commenting on posts whether you have an answer or not.
I believe shot placement is more important behind force behind the shot, which is why I like 125 grain. Don't forget that force is directly proportional to mass x acceleration. Yours might weigh more, but mine are flying a heck of a lot faster.
No, I don't shoot a Xbow. I shoot a compound at 57lbs at 656 grains.
How does it decrease resistance? Do you know what resistance force is? How does a wheel roll with the same amount of force acting equally upon both sides? What increases momentum of an object? Why would you only use a 125? Why would anyone think of using a 100 grain tip?
Do you know the difference in flight at 30 yards from 100 to 125? Have you tested an arrow with say a 100 grain vs 200 at 20 yards?
Once you have all the answers, you will understand why one would shoot a 200+ grain tip.
Not trying to be an ahole, but simply trying to educate and eliminate old myths on what the industry standard has become. It's surely not based off science and what works the best if one needs something extra.
One other question, why do traditional archers use 200-500 grain tips? what you can't get in speed, you gain with more weight, regardless of how fast it's going. one more myth most would not think about. someone that goes down in draw weight should go UP in arrow weight.
I know this is about this blood therapy head, but I wouldn't even bother with it.
250 grain? Holy man, I assume you shoot a crossbow? I'm thinking compound, I prefer 125 gr...
There are plenty of youtube videos showing them punching through some pretty solid material (cinder blocks, wheelbarrows, frozen deer shoulders, frozen bear meat). The videos are impressive. More wondering about actual field work - size of entry/exit wound, blood trail, do the mechanical ones actual open up, how do they hold up after shooting, etc. YouTube videos can show you whatever they want you to see unfortunately.
The way I took the whole rolling past bones is that the circular blade decreases resistance as it punches through bones since it almost acts as a wheel, not that it goes around the bones.
Do they make them in a 250 grain? If not I wouldn't try one.
They say they roll past bone? What is that supposed to mean? I prefer a head that destroys bone. How does it roll through through a scapula? How does that tip hold up to a leg bone of a mature buck? If a head is supposed to roll past a rib bone that's silly. you buy a head with good integrity, quality material and ample arrow weight and it shouldn't need to roll past anything, they pound through them.
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