fastoad.models.performances.mission.polar module¶
Aerodynamic polar data.
-
class
fastoad.models.performances.mission.polar.
Polar
(cl: numpy.ndarray, cd: numpy.ndarray)[source]¶ Bases:
object
Class for managing aerodynamic polar data.
Links drag coefficient (CD) to lift coefficient (CL). It is defined by two vectors with CL and CD values.
Once defined, for any CL value, CD can be obtained using
cd()
.- Parameters
cl – a N-elements array with CL values
cd – a N-elements array with CD values that match CL
-
cd
(cl)[source]¶ Computes drag coefficient (CD) by interpolation in definition data.
- Parameters
cl – lift coefficient (CL) values
- Returns
CD values for each provide CL values
-
property
definition_cl
¶ The vector that has been used for defining lift coefficient.
-
property
optimal_cl
¶ The CL value that provides larger lift/drag ratio.