Hi Tom,
I'm sorry it's taken me so long to get you the measurements that you requested. I was at Fort Funston most of last week and I flew every day from Tuesday through Saturday. But I did find the time to take the measurements that you wanted.
This first picture shows my Falcon 3 / 195 set up behind the bush at Funston. Because the glider is at an angle to the camera, the planform is foreshortened. Notice that the sweep back of the wing tips is a major contributing factor in the glider's stability, and yet that is not reflected in the measurements you've asked me to make:

- measure_001.JPG (83.82 KiB) Viewed 5028 times
These next two pictures show the location of my hang point (about 67.75 inches) from the front of the keel:

- measure_002.JPG (46.77 KiB) Viewed 5028 times

- measure_003.JPG (60.78 KiB) Viewed 5028 times
These next two pictures show the location of my hang point (again about 67.75 inches) from the rear of the keel:

- measure_004.JPG (89.1 KiB) Viewed 5028 times

- measure_005.JPG (58.68 KiB) Viewed 5028 times
These last two pictures show the location of the trailing edge of the glider as measured from the front of the keel (about 106 inches):

- measure_006.JPG (66.28 KiB) Viewed 5028 times

- measure_007.JPG (86.12 KiB) Viewed 5028 times
So to answer your question, I hang at roughly 64% of the root chord (68/106). But that is NOT 68% of the lifting surface, because of the sweep of the wings and the general complexity of the airflow over a glider. That's why wind tunnels were invented!!
