Truer point. That's what I was trying to get at from memory while being too
lazy to pull out my books! :-)

Shawn
"Ron Natalie" wrote in message
m...

"ShawnD2112" wrote in message
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And remember that glide performance has nothing to do with weight but to
do
with wing design. And, if I remember correctly, a 747 or like glides
just
about like a 172 does, it just needs a faster airspeed to do it, but
does it
at the same kind of angle.

Actually, it is a function of the lift and drag. While wing design
figures into,
the lack of things sticking out of the fuselage like landing gear, big
(compared
to the size of the aircraft) antennas, and an overall more streamlined
shape
than Jay's Piper yields much less parasitic drag.