On Wednesday, May 2, 2018 at 11:39:37 PM UTC-4, Darryl Ramm wrote:
^ BTW PowerFLARM (with the ADS-B option) also includes a PCAS capability

Darryl, can you explain that further, for those of us who are dazed and stupefied when confronted with the FAA's alphabet soup? AFAIK, PF does not transmit anything that the ATC system receives, so how can it give you collision warnings for non-FLARM aircraft, other than the warning about the presence of a transmitting transponder nearby?

Also, you say a cheap used mode C transponder is a good addition to a glider. Can you explain further what that will get you? E.g., will ATC still see you after 2020? Will PowerFLARM devices sense your mode C transponder transmissions? Will the collision-avoidance equipment on airliners detect you, now and in the future?