On Aug 29, 7:09*pm, Darryl Ramm wrote:
Andy wrote:
On Aug 29, 11:54 am, ursus wrote:
On Aug 29, 8:48 am, Darryl Ramm wrote:

BTW the landing glider's PowerFLARM did not *warn of threats as
stationary/on the ground FLARM/PowerFLARM units do not transmit
signals.
I suspect this is done for many reasons including you do not want
to
distract pilots when they are landing. Just another example of an
all
round impressive system.

Darryl

The aircraft on the ground actually do transmit a signal, but alarms
are being suppressed for landing gliders as it would distract the
pilot too much.
Urs

Under what "landing" conditions are alarms suppressed? *I'd certinly
like to be alerted to an opposite base head on with another glider or
a tug.

They are suppressed if the other glider is on the ground. Don't know the
exact details of what counts as on the ground. *I've had similar
comments from folks at other busy fields how well this works and Urs
explained it to me at a seminar, and I still got it backward. Sorry.
Sigh.

Darryl

Sounds like it can tell whether the target is moving or not. The ships
on the ground are probably indicating speed = zero in the flarm radio
packets. If that's the case, this device is not meant for
helicopters. )