"Andreas Maurer" wrote in message
news
On Thu, 30 Dec 2004 02:46:15 GMT, wrote:

The Zander flight computer performs a constant L/D calculations
throughout a
flight. The L/D is presented numerically on the screen. All you need to
do
is note the L/D, flap setting and speed at any particular time.

... and the EXACT airmass rise/fall.
This is where the task becomes impossible with current technology.


Bye
Andreas



I found this laser sensor on the web:
http://www.navysbir.brtrc.com/succes...navsea_p3.html
Not many details.
Assuming it's accurate enough, one could be used to get the glider's
vertical speed through the airmass.
Now you have both horizontal and vertical velocity measurements relative to
the local airmass.
That should simplify the problem.

Also, it might give Bill Daniels his negative-lag variometer. (Thiotimoline
being in such short supply these days)

Unfortunately, the manufacturer's website is down for revamping. I haven't
emailed the contact address.

Tim Ward