On Sat, 22 Jan 2005 at 11:28:26 in message
, Klein
wrote:

Working it the other way, for a 3 degree glideslope, at 500 ft you'd
still be 1.57 nm from the end of the runway. Unless you're flying a
glider, you need power to hold a 3 degree glideslope.

Correct. To hold a 3 degree slope at a steady speed requires an
effective Lift/Drag ratio of about 19. London City Airport I believe
has a standard glide slope of 8 or 9 degrees which would mean Lift/Drag
ratios of 7 to 6.4. Most light aircraft can manage a steeper approach
than 3 degrees I assume? Winds have a dramatic effect on these figures.

9 degrees would mean 0.52 nm at 500 ft

Anyone able to quote 'glide' angle at idle for various types, with and
without flaps or gear?
--
David CL Francis