Please let me add to the torrent of protests you must be getting (Soaring Mail, September, 2014). The argument comes from unstated assumptions: that power pilots fly a bank angle prescribed by authority, while glider pilots fly the turn diameter appropriate to the thermal. Glider pilots know that to fly a smaller circle they fly faster and bank more. I remember well once when I was climbing nicely and complacently at about 45-degrees bank, Ross Briegleb joined below me, banked about 65 degrees, and climbed past me like a rocket, centered in the extremely tight core of a strong desert thermal. Not easy, but Ross was a master.
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