On Feb 12, 12:05*pm, Chris Reed wrote:
There was a recent report in the UK press that UAVs will be permitted to
fly in Class G airspace once they are capable of autonomous collision
avoidance, and that the technology they were looking at was FLARM. I'm
sure we Brits (will) buy our UAVs from the US - might this mean that the
US military is also trialling FLARM?

Dave Nadler wrote:
On Feb 12, 1:47 pm, Darryl Ramm wrote:
FLARM? - won't see your transponder and effectively no GA aircraft in
the USA are FLARM equipped and I suspect relatively few ever would be.
If you are only concerned *about glider-glider and towplane-glider
separation then FLARM is a wonderful approach but the USA never got
the start on FLARM when it should have and now ADS-B is coming which
is going to confuse this picture (and given what is happening adopting
FLARM instead of ADS-B in many places might be bad idea). But and it
is a big but -- products like PowerFLARM and TRX-1090 that combine a
FLARM transceiver, ADS-B 1090ES receiver and a PCAS receiver look very
impressive on paper and I expect/hope to see them being used in the
USA.

Just to clarify Darryl's point: The FLARM unit to be offered in USA
is PowerFLARM, and they expect most people will opt for the ADS-B
receiver option. The ADS-B option listens to direct transponder
transmissions,
mode C or mode S, and also TIS-B ground-stations (which will
exist someday we hear).

Thanks Darryl !
Best Regards, Dave



Unlikely. I think you will find that for the USA ADS-B UAT (and to a
lesser extend at the low-end 1090ES) is the twinkle in the eye of the
US military, defense/aerospace contractors, DHS and various police
forces excited about UAVs. ADS-B is much more capable of things like
extensive remote tracking, integration with ATC systems, etc. that
Flarm does not try to do. As for looking at Flarm as an interesting
early practical implementation of an automatic broadcast system I
expect many military/defense contractor types are aware of it.

Darryl