Motorgliders and TE Probes

Paul,

Yes you need a pneumatic switch, basically it turns your TE vario into a
VSI. I had both my LNAV and Sage behind the pneumatic switch and found that
the changeover between static pressure and TE pressure wrecks the sage (not
nice watching it spin round and round). I moved the sage in front of the
switch so it gets TE pressure all the time, it's uselesss when the engine is
running (the LNAV indicates vertical speed just fine) but at least it's a
little kinder to the instrument.

Doug


"Paul Remde" wrote in message
news:NwKod.141170$R05.69144@attbi_s53...
Hi,

I have a question for motorglider owners. I sell variometers and TE
probes
but I'm still learning. A customer is building a Europa motorglider and
he
is wondering if he can mount a TE probe on the fin and connect it to the
variometer, or will the propwash cause problems. Is it necessary to use
some sort of pneumatic switch to switch between TE and static input for
the
variometer?

His pitot and static ports are on a boom that is mounted to the wing.

Thank you,

Paul Remde
Cumulus Soaring, Inc.
http://www.cumulus-soaring.com