On Tue, 04 Nov 2003 01:04:03 +1300, Bruce Hoult
wrote:

In article ,
(JJ Sinclair) wrote:

Lets see now, I'm about here, so how far to home? Should have put
some of those "old-fashioned" distance circles on this
"old-fashioned" map. OK, at 1000 feet per 15 statute miles

What are you flying that has a 80+:1 glide angle? Surely you can't
count on making up that much in arbitrary air just by dolphining, even
in a 60:1 supership?

100 ft per km is really easy, so that's what I generally use. That's
33:1.

Looks like a good, conservative figure to me. It was suggested that I
used 100ft per 6 miles as baseline when I first started taking the
club Pegasus cross country. The Peg. is fitted with an old Cambridge
Mk 4 vario and doesn't have a glide computer. 1000/6 miles is pretty
close to 100 ft/km. Now I fly with my own (removable) GPS, configured
to use metric units, so 1000ft / 10 km is a no-brainer to estimate.


--
martin@ : Martin Gregorie
gregorie : Harlow, UK
demon :
co : Zappa fan & glider pilot
uk :