In article , David CL Francis wrote:

On Tue, 14 Dec 2004 at 06:50:15 in message
, d&tm
wrote:

Wont the best glide speed also keep you in the air the longest? if not what
speed will?

Nope. Minimum sink rate is close to maximum lift AoA.
Strictly, for simple math, it is at max (CL^(3/2))/CD.

If you had a way to measure TAS instead of CAS, it would be
at almost exactly 2/3 of best glide speed for any reasonable
aircraft. This is only academically interesting, since airspeed
indicators are notoriously inaccurate at the low end of their
range. It's significantly slower, though. If you really want to
know what it is, you can determine it (roughly) by experiment.
You won't get an exact number without shutting down the
engine, but I don't recommend that.

Mike Beede