I just did a test on PowerFLARM as a logger:
Set it outside, powered up and waited. Nothing happened for hours. All surrounding trees are still standing.
Those darn FLARM folks have really overpromised! Or maybe I need to change configuration settings? Or handicraft my own antenna? Or read the manual?

I suspect it will need a hard- and software update; maybe if someone can point FLARM to an autonomous chainsaw with serial interface (ideally IGC specification) they could finally deliver what has been promised:
FLARM as a logger.

Timber!
http://www.youtube.com/watch?v=mL7n5mEmXJo

Now, if it could only make coffee...