Holger Stephan wrote:

Kevin Horton wrote:
Note 2: the glide ratio does not vary with gross weight. I won't try to
explain the math or physics as there are lots of references available on
the web for your googling pleasure.

True only in theory (i.e. on high performance gliders). The added drag with
the increased max glide speed will decrease the ratio.

- Holger

That could go either way, depending on the porportion of parasitic drag and
induced drag. However, in most cases you are exactly correct that lighter
weight will improve the glide ratio, and that heavier weight will worsen it;
assuming no wind conditions, of course.

Peter