You have to have more speed as you lean your aircraft inward in the turn - a 60 degree turn doubles the G's, thus the stall speed goes up a lot (not suure how much)! The air is not much thinner (just a bit). The headwind is probably a bit less, so the percieved, but not the actual, flight speed migh increase if you enter the thermal going into the prevailing wind! For how much the stalling speed increases we need help: The experts please advice us! Tord, Sweden -- If reply difficulties - use [EMAIL PROTECTED] Tord S. Eriksson, Ovralidsg.25:5, S-422 47 Hisings Backa, Sweden RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]