At 13:44 10 June 2012, Bert TW wrote:
On Jun 10, 1:16=A0am, Chris Nicholas wrote:
I think that if Flarm were installed with 2 antennae, one high
in the
cockpit or on top of the fuselage, and the other below, there
would be
no Flarm blind spot and it would be as near perfect as
possible. We
don=92t do that because it is too much trouble and/or too
expensive. It
is hard enough to persuade many pilots to have Flarm even
in its most
basic available form.

Chris N.

That's what I decided on last winter., because the Flarm range
analysis on my carbon fuselage Flarm installation (Ventius cM)
showed
that there were some blind spot (ranges 2km). I installed an
antenna
splitter, the original Flarm antenna outside the fuselage near
the
gear doors, and a stripe antenna behind my head inside the
canopy.
"Blind spot" now means a range of 4 km ( a bit more than 2
nautical
miles for the colonials).
Investment was $200. My ass is worth more than that.


Bert,

This kind of information is exactly what I would like to hear.
FLARM is an excellent idea, and I hope everyone installs one in
their ship. Also I hope that everyone make sure that his/her
FLARM system operates well. My problem is, that I have no idea
how to improve FLARM operation. I have changed the position of
antennas, and got mixed results, according to the range
analysis.

I believe that system of two antennas would be good. Can you
Bert please share with us your knowledge of antenna splitters
and antennas used, so that we can make similar installations.
Possibly we could add necessary components into
www.soartronic.com as DIY kits, so that everyone can have one
on minimum cost.