diff --git a/aerodynamic_analysis/src/methods/liftingLineForTAW.cpp b/aerodynamic_analysis/src/methods/liftingLineForTAW.cpp
index 0bd3298d6ad8c4171d29fcc7dbf982a8945b3982..de31955b12320007a191c02ce02dd143e16805ec 100644
--- a/aerodynamic_analysis/src/methods/liftingLineForTAW.cpp
+++ b/aerodynamic_analysis/src/methods/liftingLineForTAW.cpp
@@ -261,7 +261,7 @@ double liftingLineForTAW::getCLmax_clean(double Mach) {
     /* Assumptions and given values */
     double CLmax                = 0.0;
     double Clmax_sec            = 1.8;  // section Cl_max (general assumption) geom2::measure.phi_LE_right * PI / 180.;
-    double phi_LE_rad           = geom2::measure::sweep(liftingSurfaces.front(), 0.0, 0.0);
+    double phi_LE_rad           = getLocalSweep(liftingSurfaces.front(), - geom2::measure::mean_aerodynamic_chord_position(liftingSurfaces.front()), 0.0, "RADIAN");
     double Ma_dive              = std::min(initialMachCruise + 0.1, 1.);
     // ratio CLmax/Clmax according to [Ray18] Fig. 12.8
     // (small) influence of sweep -> assumption delta y ~ 2.1
diff --git a/aerodynamic_analysis/src/methods/liftingLinePolar.cpp b/aerodynamic_analysis/src/methods/liftingLinePolar.cpp
index 693e5300b1c56fe38b6dc4491d542488ff89835d..e6ffd34511a4ae425ba7f839884169036722fd04 100644
--- a/aerodynamic_analysis/src/methods/liftingLinePolar.cpp
+++ b/aerodynamic_analysis/src/methods/liftingLinePolar.cpp
@@ -247,7 +247,7 @@ double liftingLinePolar::getCLmax_clean(double Mach) {
     /* Assumptions and given values */
     double CLmax                = 0.0;
     double Clmax_sec            = 1.8;  // section Cl_max (general assumption) geom2::measure.phi_LE_right * PI / 180.;
-    double phi_LE_rad           = geom2::measure::sweep(liftingSurfaces.front(), 0.0, 0.0);
+    double phi_LE_rad           = getLocalSweep(liftingSurfaces.front(), - geom2::measure::mean_aerodynamic_chord_position(liftingSurfaces.front()), 0.0, "RADIAN");
     double Ma_dive              = std::min(initialMachCruise + 0.1, 1.);
     // ratio CLmax/Clmax according to [Ray18] Fig. 12.8
     // (small) influence of sweep -> assumption delta y ~ 2.1