In the comments below, let me know if they are still used in contest flying.
Two different wire bends are made.
The upper bent wire goes into a small hole in the body tube.
The bottom wire is bent into a rounded "W" and is held on by going around the fins.
Both wires are taped (or card stock strips are glued) around a launch lug. According to the CMR catalog, the launch lug is around 5" long.
The pop lug is fitted on the rocket at the launcher. A wrap or two of tape goes onto the top of the launch rod. At ignition, the rocket slides up to the top of the launch rod. The top of the pop lug hits the tape wrap and is left on the rod. The rocket continues on its flight without a launch lug.
The first bend is easy enough, near the center of the wire.
TIPS: The tape strip is to direct the next bends. I found it very hard to get the "mirrored" bends accurate. Setting small tape strips at the bend points lets you set the pliers at the same place on both sides.
On the left is the two outward bends. That first tape strip is removed.
Two more small strips of tape set up the next bends.
The bottom is bent round and the width of the half circle sets the wire end tight to the side of the down wire on the right.
More in the next post . . .