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Sling
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An adjustable sling (neither spring nor rubber band is drawn) by simply re-arranging the rubber band trace over the Delrin solid v-wheel. It has simple design. It can be built using laser-cut acrylic or polycarbonate 5mm thickness sheets or even wood. It can throw fin-stabilized arrows or marble bales, rocks, ball-bearing. Arrows can be made using aluminum tubes (8-10 mm outer diameter is perfect) but a tip and stabilizing fins is needed for better range and dispersion.
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