Fletching (FOB) Archery

thingiverse

平台为Hyper Hyte，64磅，拉距28英寸，内径4.2纯碳箭杆。 普通的4.2纯碳，外径一般在6.1-6.3之间。但传统的FOB箭羽，内圆直径固定，无法弹性扩展，如果入手的箭杆口径有差异，很难做到无缝适配，我打算改进它。 FOB-1：将内圆开槽，试图增加对口径的弹性适配，试射发现，入靶后惯性力道太大，FOB与箭杆打滑。 FOB-2：在FOB-1的基础上减小外圆直径（降低三羽叶的弹性，增加对箭杆的压力），同时延长内圆轴长（打算在延长部分用热缩管箍紧）。试射后发现依然打滑。 FOB-3：在FOB-2的基础上，将羽叶增加到6支，内圆对箭杆的咬合力大大增加，杜绝了打滑。 FOB-4：在FOB-3的基础上，前端挖凹坑，理论上飞行更平稳。 因为FOB-3和-4与箭杆贴得太紧，不得不用专用的上机小工具，很方便。 The platform is hyper hyte, 64 pounds, 28 inch pull distance and 4.2 inner diameter pure carbon shaft. Ordinary 4.2 pure carbon, with an outer diameter of 6.1-6.3. However, the traditional FOB plume has a fixed inner circle diameter and cannot be expanded elastically. If the diameter of the starting arrow rod is different, it is difficult to achieve seamless adaptation. I intend to improve it. Fob-1: the inner circle is slotted to increase the elastic adaptation to the caliber. It is found in the test firing that the inertial force channel is too large after entering the target, and the FOB slips with the arrow rod. Fob-2: on the basis of fob-1, reduce the diameter of the outer circle (reduce the elasticity of the trilobite, increase the pressure on the arrow rod), and extend the length of the inner circle axis (it is planned to tighten the extension with a heat shrinkable tube). After the test, it was found that it was still slipping. Fob-3: on the basis of fob-2, the bite force of the inner circle on the shaft is greatly increased, and the skid is eliminated. Fob-4: on the basis of fob-3, a pit is dug in the front end, which makes the flight more stable in theory. Because the fob-3 and - 4 are too close to the shaft, we have to use special tools, which is very convenient.