http://www.gliderforum.com/get-attac...ttachmentid=19

At 07:42 11 August 2005, Mr David Donald wrote:
Some years ago, I was able to download an excel spreadsheet
that
compared two gliders (via drop down boxes). It displayed
their polars
in different colours against each other. It also showed
their sink
rates at speed.

My computer has crashed and I'm trying to find a copy.
Anyone got
one out there?

Dave.