On Tuesday, January 15, 2013 12:40:01 PM UTC-5, soartech wrote:
for about $900:
http://www.brauniger.com/en/products.../overview.html

As I understand it, these rely on GPS for air speed. The remote AS sensor option pegs at 75 mph. Unless I missed something on the translated webpage, there is no remote sensor for the vario, so the pressure change would be inside the sailplane cockpit.

http://www.brauniger.com/en/products...cessories.html

Not sure how those limitations shake out because this unit is also a navigation aid.

It's amazing that you can add "passive Flarm" to this unit for $70!

I used a $200 Flytec Sonic audio-only variometer last summer when flying without a panel mounted audio vario. A number of us tried it and felt that the Sonic was a huge improvement (both safety and performance) over the alternative of flying with no audio vario. I highly recommend the Sonic to clubs and students.