I suspect my airspeed indicator is under reading as it was consistently below the GPS groundspeed.
I was trying to be cleaver and export the tlog into a spreadsheet and take averages of airspeed and groundspeed for the entire flight, hopefully eliminating wind error and giving me some estimation of magnitude( but the CSV import just ends up like spaghetti). At the higher speeds I suspect it may be 10m/s error, and the stall at 8m/s was probably a little slow (expecting 10).
Can someone advise me on the ARSPD_RATIO parameter? Which way, and how much should I tweak it for starters?