There is still a great deal of work to do on Flarm before it is a
truely trustworthy piece of equipment.
Ramy ... name calling is just what we don't want on these discussions.
Your Power Flarms should be able to detect and display a transponder
that is actively being interrogated by ATC radar. The last four times
I have flown in airspace with PowerFlarm equiped gliders and have been
close enough to the Flarm plane to be able to read the model name on
the side of the cockpit, the PowerFlarm pilot did not see me on their
display. I talked with each of those pilots on the radio. My
transponder is blinking like a WalMart christmas tree and they don't
see me. They don't see me with their eyes either !!!!!!! My
transponder has passed all the tests and the antenna radiates with no
detectable blind spots. There are still some significant problems
with antenna placement with Flarm, especially in aircraft that have
carbon fuselages. Then there is the wildcard of how pilots set the
parameters on their Flarms...or don't.

Guy Acheson "DDS"