The crank wire is the most difficult part of the ornithopter, but you've had practice. Also, if you make a mistake, you can easily cut off the crank wire and make a new one.

Bend the motor hook first. Then slide the wire through the bearing tube on the bottom of the fuselage. Cut a 1/8" long piece of aluminum tubing as a thrust washer and slide this onto the front end of the wire. In Figure 1, you are now ready to bend the crank itself.

Make the first bend by grasping the wire with pliers just ahead of the thrust washer. All bends are 90 degrees. Carefully make the second bend so that it is in the same plane as the first, so that in Figure 2 the wire is parallel to the bearing tube.

The third bend rises directly "out of the page" (Figure 3), and the fourth and final bend leaves the wire once again parallel to the bearing tube (Figure 4).

Make two connecting rods (conrods) from plywood. The critical dimension is the distance between holes, which are made by piercing the wood with a straight pin and enlarging the hole with cut wire. Slide these onto the crank.

Next step: Install Wings and Tail