On Sunday, July 14, 2013 11:08:50 AM UTC-7, jfitch wrote:
Got a question: the Butterfly wind vector and the XCSoar wind vector (derived from Butterfly information) seem to disagree by 180 degrees. That is they point toward each other. XCSoar seems to believe it too, based on glide calculations. I am using the LX format output on the Butterfly. I am assuming the arrow on each is intended to point the direction the wind it blowing towards, I.e., a vector. From observation, the Butterfly appears to be correct, XCSoar 180 off. Has anyone seen this? Another question for XCSoar users: There must be some better way to edit a task in the air than I have discovered. The only way I have found to do it is (Double tap)NavTaskTurnpointsAdd TurnpointAdd Turnpoint again (or select)(Scroll through list and find turn point)(Select turn point)(Select again or touch 'Select')(Hit up arrow several times to get it to the right place)CloseFly. Minimum of 12 taps and maybe a lot more. There must be a much quicker way with a lot less head down time. What is it?

In my glider the Butterfly wind is similar to the PowerFlarm - V7(ISU firmware) - Ultimate Le running SeeYou PNA. So I don't think it is a Butterfly problem.

Richard
Craggy Aero LLC