diff --git a/data/settings.yaml b/data/settings.yaml
index 627b3378..c27ae56c 100644
--- a/data/settings.yaml
+++ b/data/settings.yaml
@@ -58,7 +58,7 @@ kps4:
     rel_top_mass:  0.4      # mass of the top particle relative to the sum of top and side particles
 
 kps4_3l:
-    radius: 10.0                    # the radius of the circle shape on which the kite lies, viewed 
+    radius: 10.0                    # the radius of the circle shape on which the kite lines, viewed 
                                     #     from the front                                              [m]
     bridle_center_distance: 2.0     # the distance from point the center bridle connection point of 
                                     #     the middle line to the kite                                 [m]
@@ -67,7 +67,8 @@ kps4_3l:
     min_steering_line_distance: 4.0 # the distance between the left and right steering bridle         [m]
                                     #     line connections on the kite that are closest to each other [m]
     width:                  20.0    # width of the kite                                               [m]
-
+    aero_surfaces:          10      # the number of aerodynamic surfaces to use per mass point        [-]
+    
 bridle:
     d_line:    2.5            # bridle line diameter                                                 [mm]
     l_bridle: 33.4            # sum of the lengths of the bridle lines                                [m]
diff --git a/src/settings.jl b/src/settings.jl
index 94425310..03d5d8c5 100644
--- a/src/settings.jl
+++ b/src/settings.jl
@@ -127,7 +127,7 @@ $(TYPEDFIELDS)
     rel_top_mass          = 0
     
     # model KPS4_3L
-    "the radius of the circle shape on which the kite lies, viewed from the front [m]"
+    "the radius of the circle shape on which the kite lines, viewed from the front [m]"
     radius::Float64 = 10.0
     "the distance from point the center bridle connection point of the middle line to the kite [m]"
     bridle_center_distance::Float64 = 2.0
@@ -137,6 +137,8 @@ $(TYPEDFIELDS)
     tip_length::Float64 = 1.0
     "the distance between the left and right steering bridle line connections on the kite that are closest to eachother [m]"
     min_steering_line_distance::Float64 = 4.0 
+    "the number of aerodynamic surfaces to use per mass point [-]"
+    aero_surfaces::Int64 = 10
 
     "bridle line diameter                  [mm]"
     d_line                = 0