On Tuesday, 2 July 2013 09:10:01 UTC-6, Thin Air wrote:
Thanks for the replies. I was considering the Sonic but was wondering how pressure changes internal to the cockpit (vents, etc.) might affect it.



I think I'll give one a try. :-)



JB

Another option is http://www.craggyaero.com/lx_navigation1.htm

Colibri II

It provides a vario plus a certified logger.

I have not used it so cannot on audio etc.

The sonic will react to pressure changes, as will a 5/6030 Flytec, just the nature of the beast. Furthermore no TE compensation so expect stick thermals indications.

Your prior soaring skills will do you well. Welcome to the party