During the period of the great patent wars or there abouts between Jim Walker and the Stanzell brothers, The stanzells first sold the SkyShark kit intended for the early glow engines like the Brown Jr. and it used what they called the "G" line control system. It essentially was a form of whip control.

The plans illustrated the method which consisted of an eight foot bamboo pole and a system of leading edge standoffs with the whip line well forward of both the leading edge and CG. Both the rudder and elevator were fully articulated and used a system of rubber bands to lock in fine adjustments.

Later to avoid royalties to Jim Walker the Stanzells developed the mono line control system.

John