On Friday, July 3, 2015 at 10:22:14 AM UTC-7, Jonathan St. Cloud wrote:
Can anyone out there tell me where I can purchase a small hand held final glide
computer (like a revolving or slide rule type) that can be easily
used to compute final glide from GPS data (eg distance to fly,
head and tailwind components, altitude needed etc)?

E6B works really well for this. Line up altitude and distance (in NM), and the pointer shows glide ratio. Recalculate every few miles and if glide ratio stays constant or decreases, you're OK, if it increases, you may need a climb.

Many cool pilot watches come with one ;-)

-Tom