At 17:34 13 February 2013, waremark wrote:
What I have read on this forum has led me to think that the
Butterfly is
currently a decent vario in operation but nothing special. Can
anyone with
practical experience say different?

I surmise that the software engineers have not yet discovered
what to do
with all the data available to them.

Since my LX 9000 has the optional giro box what data would it
not have that
would potentially make the Butterfly better?

The very alluring Butterfly vario is using the sensor data but the
concern that has stopped me choosing it so far is the
importance for its performance of getting an accurate reading
from the magnetometer. It is inside the main sensor box which
has all the electrical and pneumatic connections and that makes
it awkward to mount in a way that meets the installation
manual's specifications for distance from electromagnetic field
interference - especially in a retractable motor glider. Two
friends have returned them because theye were unable to
achieve this.

I have the same worry about getting the similarly configured CN
vario for the same reason - although it doesn't matter at
present while the magnetometer is not used (AFAIK).

The LX 9000 AHRS unit has "3 axis Gyros with MEMS technology
and 3 axis digital +-6g accelerometer" according to the
website. If the separate LX 9000 compass module is 3-axis(??)
then including that along with the GPS in the 9000 and the
pneumatic sensors from the V5 vario would appear to make it
match the sensor mix of the Butterfly. Whether they could all
be integrated to work as a full intertial sensor unit I have no
idea - nor whether LX Nav have any plan to try to make it do
so. The fact that the magnetometer is a separate box should
make it easier to locate away from interference.

John Galloway