A new winchworm design will also debut at my "Make Your Own Windbot Muscle" exhibit at Maker Faire.This winchworm uses about 24" of a 160Q balloon as its body and about 8 grams of detergent-washed tie wire (a wire used to place concrete reinforcement) at each end of the balloon for front and back legs. There are two feet in back and one in front; each foot is a safety loop of wire made using jeweler's round-nose pliers.
The two loops of Berkeley 1-lb test are tied using nails about 4" apart. The single loop (with knots at each end) is tied on nails about 2-1/2" apart.