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  1. Amateur Barbarian

    It has been awhile

    I have not been on this forum for quite a few years. A couple of requests for test data on HEX limbs brought me back. Unfortunately, Photobucket changing their policy toward linking pictures to forums resulted in the charts in my testing threads to disappear. I have extracted some HEX charts...
  2. Amateur Barbarian

    Evolution of the Border Limb

    Here are a couple of pictures that show the evolution of the Border recurve limb. I posted this at the bottom of the family tree thread. I thought folks might want to see it here and add there own historic Border limb pictures. The limbs are in chronological order, with the top being oldest...
  3. Amateur Barbarian

    First Derivative of the DFC: What does it mean?

    The first derivative of the draw force curve has been suggested as a means of measuring smoothness of a bow. These are my thoughts on this curve. Feel free to join in on the discussion. I am interesting in hearing the opinions of others. The first derivative is the slope of the draw force curve...
  4. Amateur Barbarian

    Limb bolt screw loose

    My limb bolt screws on my HEX6 keep coming loose. I am a little afraid to tighten them much. How tight should they be, and what is the best way to secure them, so that I can get them off later if needed? Is there a color of Loctite that works?
  5. Amateur Barbarian

    Simple trick to help string HEX6 limbs.

    Keeping the string aligned properly on the bottom end of the bow while stringing can be difficult with the big recurves on the HEX limbs. I found that an easy trick to keep the string in place is to hold it down with some tape. The tape ensures that the string stays centered on the limb until...
  6. Amateur Barbarian

    A little thought experiment: Can we describe how limbs work using levers?

    Okay, I have been doing more thinking about the physics of limbs. This precipitated a post that I had on Tradtalk about static recurves. I decided to move the discussion over here since this type of discussion tends to sustain itself better here. I am going to propose a model that consists of...
  7. Amateur Barbarian

    Bow square for your HEX6 limbs

    Imagine my surprise when I went to check my tiller and found that my bow square was not graduated low enough to measure it. In fact, all of my bow squares are marked down to 6 inches, not quite low enough for a bow with a 7 3/4 inch brace height. Well, I could tape a scale to one I already have...
  8. Amateur Barbarian

    Shake, rattle and roll

    I had mentioned previously that I was getting some noise out of my HEX6 limbs that sounded like some limb rattle. I made some brace height changes to help eliminate the issue, but it did not fully go away. I was shooting 90 meters today when the sound returned. While shooting, I heard something...
  9. Amateur Barbarian

    Border HEX6 limb test and comparison

    This is my first installment of test results on HEX6 limbs. I will be showing the following: Draw force curve Stored energy Energy per pounds on the fingers Smoothness (First derivative of the draw force curve) Chrono readings. The test were conducted using my worm gear draw board with a...
  10. Amateur Barbarian

    HEX6 brace height and string length question

    I just got my HEX6 and now it is time to set my bow up. I am uncertain about the brace height, though I have heard under 8 inches on a 70 inch bow. I am looking for brace height and string length from any HEX6 shooters using 70 inch bows. I may just string it up using my HEX5 string and add...
  11. Amateur Barbarian

    How did Border come to put a HEX on the archery community?

    Sid, Can you fill us in on what led to the development of the HEX limb design and how the design concept evolved into what became, the HEX4, HEX5 and HEX6? Is the HEX4 the 4th version created? What about HEX1, 2 and 3? Do these early versions still exist? What did they look like and how did...
  12. Amateur Barbarian

    Limb innovations for compound bows -- thought experiment

    It is late and I was thinking about compound limbs. Compound bows started like recurves with pullies. Limbs had recurves, many had double recurves. Now, it seems that most of the technology has moved to the cams and the overall bow design -- modern limbs look fairly simple. I am uncertain...
  13. Amateur Barbarian

    Preload

    I recently asked a question regarding the definition of preload. I had remembered it as being the energy stored in the early part of the draw cycle through the hump and to the valley of what I call the first derivative curve. I finally found where I derived that from. I saw a definition of...
  14. Amateur Barbarian

    Takng a lesson from Occam's razor

    I have been trying to figure out how to map limbs during the draw cycle. My last attempt was to use this large metal wood working guide that conforms to the shape of the part you are measuring, and has clamps to lock the shape in place. I could not get it to comform to the shape of the braced...
  15. Amateur Barbarian

    A first attempt to discover how a limb stores energy

    I have been trying to understand how the bow limbs loads. If you break the limb into two pieces: recurve and beam, in what part of the cycle do each load and is there a relationship between this loading relationship and some of the features seen in drawforce data? I drew a set of 36 pound long...
  16. Amateur Barbarian

    Home Made Draw Board for Draw Force Curves

    I constructed this draw board for making draw force curves. I used a Dutton-Lainson Worm Gear winch which is very smooth and accurate. No ratcheting. You can easily go up and down the draw cycle and stop at any distance you like. I am still working on the scale. Archery scales have short shutoff...
  17. Amateur Barbarian

    Interesting outcome when I raised brace height

    I have been experimenting with new strings on my Best Moon with 36 pound long HEX5W limbs (47 pounds at my 32 inch draw length). The latest is a 16 strand D97 66 inches at approximately 40 twists. I brought my chrono to the range to test the string since I had heard that it would be slower than...
  18. Amateur Barbarian

    What would you buy?

    I like to consider what I would buy if someone gave me $5000 to spend on archery equipment. I would start with 2 sets of lighter weight HEX6 limbs (32 and 34 pounds). I would consider a Bernardini Aladin (because it is so cool) I would buy a Barnsdale Classic X compound finger bow Finally I...
  19. Amateur Barbarian

    Longbow versus recurve ILF riser design question

    Is there a fundemental difference in the way that an ILF longbow riser should be designed versus a recurve riser...or could the differences be made up for with the design of the longbow limbs? How would an optimally designed longbow riser differ from an optimally designed recurve riser?
  20. Amateur Barbarian

    Hex6

    Sid, Unless my eyesight is really bad, I do not see a HEX6 thread here yet. It has already hit Tradtalk in the US. It is time for us to get the action going here. You posted DFC curve (but only out to 29 inches) comparing the HEX5 and HEX6. I really want to see out to about 33 inches where...
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