> How does the single axis accelerometer detect a coordinated turn? It does not. It just helps keep it coordinated. Kind of like decreasing the roll rate. Very useful with short wings. A rate gyro works better imho. For example one of those from Murata or Tokin. A heli gyro could also be used, mounted with the axis horizontal and parallel to the wings. Peter -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads