diff --git a/Aircraft/c172p/Engines/prop_75in2f.xml b/Aircraft/c172p/Engines/prop_75in2f.xml
index 3109f71c7..b6c8f4185 100644
--- a/Aircraft/c172p/Engines/prop_75in2f.xml
+++ b/Aircraft/c172p/Engines/prop_75in2f.xml
@@ -14,11 +14,11 @@
       0.2   0.067
       0.3   0.066
       0.4   0.064
-      0.5   0.061
-      0.6   0.057
-      0.7   0.050
-      0.8   0.040
-      0.9   0.029
+      0.5   0.062
+      0.6   0.059
+      0.7   0.054
+      0.8   0.043
+      0.9   0.031
       1.0   0.019
       1.1   0.008
       1.2   -0.001
@@ -44,11 +44,11 @@
       0.2   0.0600
       0.3   0.0580
       0.4   0.0520
-      0.5   0.0450
-      0.6   0.0421
-      0.7   0.0389
-      0.8   0.0346
-      0.9   0.0280
+      0.5   0.0457
+      0.6   0.0436
+      0.7   0.0420
+      0.8   0.0372
+      0.9   0.0299
       1.0   0.0202
       1.1   0.0111
       1.2   0.0075