Originally Posted by Richard Jones
Weight does not effect the glide range within certain parameters. It does effect the TAS. Heavy = Fast.
Incorrect. That is what the thread is all about. Doubleback's explanation is spot-on.
Weight has a direct effect on the "gliding" aka idle-thrust descent range because we are descending at the same speed. The higher the weight, the more descent distance a jet needs at the ATC speed.