On Tuesday, January 15, 2013 4:16:45 AM UTC, wrote:
On Tuesday, January 15, 2013 11:40:45 AM UTC+11, PapaFox wrote:

Try this link



http://www.streckenflug.at/popup.php...tacho.pdf&xy=J







the text is in German







PF

I don't speak german, but that appears to be a paper about speed to fly.

try these?

http://libelle.bugwiper.com/ea_gr1000.ppt

http://www.streckenflug.at/download/...windigkeit.pdf



from the xcsoar user archive

Thanks to both responders but these articles refer to Herr Pirker's suggestions for estimating instantaneous cross country speed according to the calculated movement of the glider's shadow over the ground during climb and glide.

( See: http://www.glidingmagazine.com/Featu...cle.asp?id=424 )

For the interest of LX 8/9000 users, the "Req.Mc" and "STFReq" navboxes are calculated according to Pirker's (other)glide theory.

John Galloway