Hi, I've seen the forces in a turn depicted two different ways: http://selair.selkirk.ca/Training/Aerodynamics/images/lf-turn.gif [Broken] http://www.free-online-private-pilot-ground-school.com/images/forces_during_turn.gif Which one is correct? I think the first one would be since it's analyzing it from one reference frame and the second picture appears to analyze it from multiple reference frames. Regarding the second picture: if the forces are all balanced (as depicted), the airplane wouldn't be accelerating. How can it turn then? Cheers!