A nylon rope was fixed to the rim and wrapped around to feed a pair of tangent pulleys in a fixed relationship. Those pulleys, in turn, fed a pair of frame-mounted pulleys which guide the rope up to the rider.
With this odd looking arrangement, the effort is always measured from the same place without any changes in leverage.
I made tiny aluminum guides to keep the ropes from falling off the cheap pulleys. Click on the pic to see details.
The ropes failed because the pulleys were set for direct steering instead of counter-steering. When I pulled on a rope to turn right, I really needed to be pulling on the left rope. I added a third set of pulleys, which effectively created reversed steering, but I haven't tried it yet because I added handlebars connected to the fork via a drag link (shown below) instead. This steers pretty well but I'm not sure how I'll measure the effort.
