Centurion wrote:
COLIN LAMB wrote:

According to Pilatus, the actual number is 12:1
http://www.pilatus-aircraft.com/medi...nglish-Imp.pdf

...or 2.6nm per 1000'.


Using the FAA "definition" of 1 nm = 6000 feet, that equates to

2.6*6000/1000 = 15.6:1 ~3.667 degrees
which matches the 16:1 (not 12:1) I noticed in the above performance
document.

I once heard a 727 had a 27:1 glide ratio, power off, clean...

And some of my co-worker test pilots encountered mountain wave in a
130,000 lb MD-90, and had the opportunity to find out that it would
maintain altitude at idle power...