On Oct 27, 5:17*pm, wrote:
On Oct 27, 12:01*pm, Greg Arnold wrote:

Does a newer logger (such as the one in the PowerFlarm) work OK with an
L-Nav, or is there a reason for an L-Nav owner to keep the old model 20
logger?

Flarm logger is independant of other stuff.
If the system you have now uses integrated LNav/Model 20/ PDA or other
display you have a working system.
Delete the Model 20 and you have nothing to accept ASI info from the
LNav and process to get real wind calculation.
Flarm does no navigation, just safety info and logging.
If you have another vario/ glide computer/ display, then this doesn't
matter.
In any case, Model 20 is a good back up.
FWIW-
UH

(not relevent to the orignal question but hopefuly interesting to some
folks...)

The PowerFLARM is independent until you want to get its traffic data
out (which most pilots probalby will just use the intental screen).
Then some folks might think they are stuck, but don't fret...

Like other Flarm systems the PowerFLARM output NMEA serial data with
extensions that provide traffic data for external displays like a
ClearNav or PDA/PNA running SeeYou, WinPilot, XCSoar, LK8000, etc.
(They also have a separate data port for the little Butterfly like
displays). Some pilots, especially those with large displays, may want
to see traffic (and warning pop-ups) displayed on those devices, to do
that you need to connect to the GPS in the PowerFLARM. The problem is
if you currently connect to a flight computer like a Cambridge 302 or
similar device to get it's enhanced NMEA data with say TAS (for SeeYou
Mobile, WinPilot etc. to calculate their own wind) or Wind data (for
ClearNav) then you need to combing two GPS sources. And bada bing...
magic boxes exists that let you merge together two NMEA soruces. The
obvious one for us is the K6 NMEA Mux (http://tinyurl.com/2cvfl4g). I
know Cumulus Soaring will be selling those in the USA to support
PowerFLARM adopters who want to do this (most will not).

Personally I'll probalby be using a PowerFLARM brick mounted behind
the panel and the ButterFly display it comes with mounted high on my
glareshield for the warnings etc. but I want to use the traffic data
out of the PowerFLARM to drive a larger SeeYou Mobile display so I'll
likely be buying a K6 Mux to combine that traffic data with my C302
NMEA data-out.

Darryl