He used an Edge-on-Up Industrial Edge Tester to do this and kept cutting angles consistent. Greendwood tested sharpness by seeing how much force was needed to cut Double X+ media (measured in grams). Sharpness and Edge Retention The sharpness test fixture. It’s also important to note that each piece of media used in testing was uniform in size because different size pieces create different results. It is important to note that these media types take more force than is required to penetrate an actual whitetail. Faux leather was used as a hide simulator and is a great indicator of tip design. He used closed cell foam to shows the effect of ferrule design. Greenwood used the doormat first to test each broadhead’s edge drag. These media were picked for their consistency and their ability to isolate certain portions of the broadheads. There are many options for media, but Greenwood chose: doormat, closed cell foam, and faux leather. The push force instrument measures in pounds, and two measurements were taken to rule out any variation in the testing. We measured the push force test with a NIST certified FG-3009 digital force gauge that operated on a test stand, which allowed for a controlled rate of force to be applied. With those measurements we can infer if a broadhead will penetrate a live animal well. But what we can do is measure the amount of force it takes to push a broadhead through different media. Predicting how well a broadhead will penetrate an animal isn’t possible, since every shot on a wild animal is a dynamic situation. If you’re hunting large game like elk and moose, you’ll want a head that will easily passthrough those tough animals. How We Tested Broadheads Push Force The doormat media.
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