When the THERMAL SCAN mode is enabled, the FX-61 Phantom wing,
piloted by the ThermoPilot is able to do a full autonomous
thermalling in a cylinder of specified radius delimited by
a ceiling altitude and a floor altitude .
This e-glider can fly as long as the thermal updrafts exist
in this area...
more infos at: http://diydrones.com/profile/JeanLouisNaudin