If the Butterfly vario (but it's called something else now) detects
problems during calibration, it decreases the amount of information used
from the inertial sensors. Proximity to anything electrical can cause
errors.
The only one I have flown had passed all the calibration tests so had
good confidence in and used those sensors. While ridge soaring, the wind
direction seemed to indicate perfectly. The "needle" swung smoothly in
turns. The TE was from a typical probe, and the system seemed to
indicate what a finely tuned TE should. Believe that vario represents
the current state of the art. It costs significantly more than the
competition.
My own glider came with a ClearNav vario, not yet programmable to use
the inertial sensors, but the ESA DN-3fach-UN probe works very well with
it. That probe and your existing vario might be the best
upgrade, $400 and a few seconds to install.
Jim
On 5/22/2014 10:38 PM, Matthew Scutter wrote:
I believe the butterfly vario has an adjustment of how much you want
to 'mix in' the accelerator/gyro with the TE. I hear the recommended
setting has increased over time so they must be getting more confident.
Current the big advantage of these new varios is instantaneous wind
information. I can see that being very useful in the mountains.
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