diff --git a/hdw-a333x/src/base/headwindsim-aircraft-a330-300/SimObjects/Airplanes/Headwind_A330_300/flight_model.cfg b/hdw-a333x/src/base/headwindsim-aircraft-a330-300/SimObjects/Airplanes/Headwind_A330_300/flight_model.cfg
index d9928422..d354163b 100644
--- a/hdw-a333x/src/base/headwindsim-aircraft-a330-300/SimObjects/Airplanes/Headwind_A330_300/flight_model.cfg
+++ b/hdw-a333x/src/base/headwindsim-aircraft-a330-300/SimObjects/Airplanes/Headwind_A330_300/flight_model.cfg
@@ -10,9 +10,9 @@ reference_datum_position = 0, 0, 0
 empty_weight_CG_position = -28.276, 0, 0 ; Position of airplane empty weight CG relative to reference datum (FEET), z, x, y
 CG_forward_limit = 0.15 ; Gravity center forward limit (longitudinal offset) for longitudinal stability
 CG_aft_limit = 0.41 ; Gravity center after limit (longitudinal offset z) w.r.t reference datum for longitudinal stability (FEET)
-empty_weight_pitch_MOI = 28163472 ; Empty pitch moment of inertia, Jxx (SLUG SQ FEET)
-empty_weight_roll_MOI = 9217827 ; Empty roll moment of inertia, Jzz (SLUG SQ FEET)
-empty_weight_yaw_MOI = 36117016 ; Empty yaw moment of inertia, Jyy (SLUG SQ FEET)
+empty_weight_pitch_MOI = 23228392 ; Empty pitch moment of inertia, Jxx (SLUG SQ FEET)
+empty_weight_roll_MOI = 14300433 ; Empty roll moment of inertia, Jzz (SLUG SQ FEET)
+empty_weight_yaw_MOI = 18500000 ; Empty yaw moment of inertia, Jyy (SLUG SQ FEET)
 empty_weight_coupled_MOI = 10000 ; Empty transverse moment of inertia, Jyz (SLUG SQ FEET)
 activate_mach_limit_based_on_cg = 0 ; Activate mach limitation depending on CG position (true if > 0 /false othewise). Mostly for Concorde).
 activate_cg_limit_based_on_mach = 0 ; Activate cg limitation depending on mach value (true if > 0 /false othewise). Mostly for Concorde).
diff --git a/hdw-a339x/src/base/headwindsim-aircraft-a330-900/SimObjects/Airplanes/Headwind_A330neo/flight_model.cfg b/hdw-a339x/src/base/headwindsim-aircraft-a330-900/SimObjects/Airplanes/Headwind_A330neo/flight_model.cfg
index 11ac0122..7483ab00 100644
--- a/hdw-a339x/src/base/headwindsim-aircraft-a330-900/SimObjects/Airplanes/Headwind_A330neo/flight_model.cfg
+++ b/hdw-a339x/src/base/headwindsim-aircraft-a330-900/SimObjects/Airplanes/Headwind_A330neo/flight_model.cfg
@@ -12,7 +12,7 @@ CG_forward_limit = 0.15 ; Gravity center forward limit (longitudinal offset) for
 CG_aft_limit = 0.41 ; Gravity center after limit (longitudinal offset z) w.r.t reference datum for longitudinal stability (FEET)
 empty_weight_pitch_MOI = 23228392 ; Empty pitch moment of inertia, Jxx (SLUG SQ FEET)
 empty_weight_roll_MOI = 14300433 ; Empty roll moment of inertia, Jzz (SLUG SQ FEET)
-empty_weight_yaw_MOI = 35047716 ; Empty yaw moment of inertia, Jyy (SLUG SQ FEET)
+empty_weight_yaw_MOI = 18500000 ; Empty yaw moment of inertia, Jyy (SLUG SQ FEET)
 empty_weight_coupled_MOI = 10000 ; Empty transverse moment of inertia, Jyz (SLUG SQ FEET)
 activate_mach_limit_based_on_cg = 0 ; Activate mach limitation depending on CG position (true if > 0 /false othewise). Mostly for Concorde).
 activate_cg_limit_based_on_mach = 0 ; Activate cg limitation depending on mach value (true if > 0 /false othewise). Mostly for Concorde).
diff --git a/hdw-a339x/src/base/headwindsim-aircraft-a330-900/SimObjects/Airplanes/Headwind_ACJ330_900/flight_model.cfg b/hdw-a339x/src/base/headwindsim-aircraft-a330-900/SimObjects/Airplanes/Headwind_ACJ330_900/flight_model.cfg
index 8fc49f5e..beac4771 100644
--- a/hdw-a339x/src/base/headwindsim-aircraft-a330-900/SimObjects/Airplanes/Headwind_ACJ330_900/flight_model.cfg
+++ b/hdw-a339x/src/base/headwindsim-aircraft-a330-900/SimObjects/Airplanes/Headwind_ACJ330_900/flight_model.cfg
@@ -12,7 +12,7 @@ CG_forward_limit = 0.15 ; Gravity center forward limit (longitudinal offset) for
 CG_aft_limit = 0.41 ; Gravity center after limit (longitudinal offset z) w.r.t reference datum for longitudinal stability (FEET)
 empty_weight_pitch_MOI = 23228392 ; Empty pitch moment of inertia, Jxx (SLUG SQ FEET)
 empty_weight_roll_MOI = 14300433 ; Empty roll moment of inertia, Jzz (SLUG SQ FEET)
-empty_weight_yaw_MOI = 35047716 ; Empty yaw moment of inertia, Jyy (SLUG SQ FEET)
+empty_weight_yaw_MOI = 18500000 ; Empty yaw moment of inertia, Jyy (SLUG SQ FEET)
 empty_weight_coupled_MOI = 10000 ; Empty transverse moment of inertia, Jyz (SLUG SQ FEET)
 activate_mach_limit_based_on_cg = 0 ; Activate mach limitation depending on CG position (true if > 0 /false othewise). Mostly for Concorde).
 activate_cg_limit_based_on_mach = 0 ; Activate cg limitation depending on mach value (true if > 0 /false othewise). Mostly for Concorde).