The advice given by a UK former multiple world champion was to have a
simple vario with well sorted TE. Then to spend the balance on Aerotows.

Speed to fly is simple, for an unballasted Discus either fly at 80kts or
55kts.

PF

At 15:49 10 February 2013, rk wrote:
On Sunday, February 10, 2013 12:45:37 AM UTC+2, Alexander Swagemakers
wrote=
:
So far I have enjoyed the best results with a Zander ZS1 and Peschges
VP4=
.. I would not recommend LX5000 and LX7000 from my experience. LX8000 is
bet=
ter than its predecessors but earns its merits more from the fancy stuff
th=
an the vario.
=20
=20
=20
The quality of the vario depends mainly on the quality of your TE
probe,
=
static port and tubing. Most people like and get the best results from a
va=
rio they are used to. On this basis its hard to find a best performing
vari=
o.


That's true, especially for older gliders with sometimes shabby TE
compensa=
tion systems. Modern generation, say gliders less than 20 years old, have
q=
uite good static systems that deliver consistent performance. I flew
Zander=
SR in LS8, Discus-2, Ventus-2 and DuoDiscus, all of them with excellent
re=
sults. VP4 in LS8 was ok but nothing special, IMHO.