Main Discussion Area > Flight Bows
Arrows to shoot a mile
Tuomo:
--- Quote from: avcase on January 27, 2021, 02:04:57 pm ---This recurve design averages about 70% dynamic efficiency at 0.44 grains per pound, so a majority of the energy stored drawing the bow still makes it to the arrow.
Alan
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May I ask, what is this recurve design? Would it also be possible to use that design in primitive bows? Or is it specific to foot bows or is it material dependent?
avcase:
--- Quote from: Tuomo on February 01, 2021, 05:47:17 am ---May I ask, what is this recurve design? Would it also be possible to use that design in primitive bows? Or is it specific to foot bows or is it material dependent?
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This is an interesting thought. Yes, I believe it could be adapted to all natural materials. I follow many of the exact same ideas we discuss here with the primitive flight bows. It is a mild static recurve. Each limb is 20” long. A majority of the bending takes place over 2-3” of the limb, and the wood core is very thin in that area to accommodate the bend without taking on damage or internal set. The limb gradually transitions to very rigid levers and more stiff materials.
I think a modified version of this optimized for sinew-wood-horn composite with natural string would be an interesting project. It would be like making a crossbow prod. I could make very similar arrows out of solid high density Tonkin split cane with water buffalo vanes. I bet 1300 yards is possible. It would pop the string on every shot.
Arvin Weaver made an amazing crossbow a few months back with bamboo back and water buffalo horn belly. I mounted the limbs from that crossbow in my footbow because he wanted to know what it would do. Unfortunately, the bamboo in one of the limbs sheared apart before I could find out. I felt pretty bad about that, but I was able to repair it and will try again.
Alan
sleek:
--- Quote from: avcase on February 01, 2021, 01:34:32 pm ---
--- Quote from: Tuomo on February 01, 2021, 05:47:17 am ---May I ask, what is this recurve design? Would it also be possible to use that design in primitive bows? Or is it specific to foot bows or is it material dependent?
--- End quote ---
This is an interesting thought. Yes, I believe it could be adapted to all natural materials. I follow many of the exact same ideas we discuss here with the primitive flight bows. It is a mild static recurve. Each limb is 20” long. A majority of the bending takes place over 2-3” of the limb, and the wood core is very thin in that area to accommodate the bend without taking on damage or internal set. The limb gradually transitions to very rigid levers and more stiff materials.
I think a modified version of this optimized for sinew-wood-horn composite with natural string would be an interesting project. It would be like making a crossbow prod. I could make very similar arrows out of solid high density Tonkin split cane with water buffalo vanes. I bet 1300 yards is possible. It would pop the string on every shot.
Arvin Weaver made an amazing crossbow a few months back with bamboo back and water buffalo horn belly. I mounted the limbs from that crossbow in my footbow because he wanted to know what it would do. Unfortunately, the bamboo in one of the limbs sheared apart before I could find out. I felt pretty bad about that, but I was able to repair it and will try again.
Alan
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Is there a category for all wood self bow for the foot bow?
avcase:
--- Quote from: sleek on February 01, 2021, 02:00:53 pm ---Is there a category for all wood self bow for the foot bow?
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No, there isn’t a primitive-specific footbow category. But please don’t let this stop you! Any information you provide about your bow, arrows, and strings on the equipment registration form will be transferred to the detailed shoot results. So there will be a permanent record of what you shot, and how far it was shot that can always be referenced in the future. There are times where someone does make an exceptional shot with equipment that does not quite fit in the existing categories. I was thinking of collecting some of these in a document for those who are curious. For example, Bede Dwyer once shot a round using a modern materials bow with a Historical Korean overdraw “Tongah” made from a split length of bamboo or grooved wood. It allowed him to shoot these very short arrows at full draw. He also shot similar full length arrows from the same bow for comparison. This didn’t fit in any existing category, but the results were officially measured and recorded for anyone who is curious.
Alan
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