Also the climb rate which flarm shows is not compensated nor a good averager. I often see 9.9 knots when the glider is only climbing at 1-2 knots on average. Totally misleading.

Flarm knows groundspeed which is usually close enough to airspeed to allow a first order TE compensation calculation. I think we should expect Flarm to get that on their To-Do list. Also, Flarm should not pass any number for climb rate until enough integration time has passed that the number has become usefully stable and meaningful (until the reading stabilizes, we should just see two dashes in the display).

Now that all of the basic functions of PowerFlarm are working, this is the time to do refinement. The ability to read a meaningful climb rate for other gliders is potentially a very nice feature. When this is working right, I suspect that folks will be less likely to choose stealth mode.