diff --git a/Engine/prop30FP2B.xml b/Engine/prop30FP2B.xml
index f2712ceae..fcfa7153e 100644
--- a/Engine/prop30FP2B.xml
+++ b/Engine/prop30FP2B.xml
@@ -3,6 +3,8 @@
   IXX       5
   DIAMETER  76
   NUMBLADES  2
+  MINPITCH 20
+  MAXPITCH 20
   C_THRUST 17 1
   0.0   0.117
   0.1   0.117
diff --git a/Engine/prop_75in2f.xml b/Engine/prop_75in2f.xml
index 484abf605..c4ab22e55 100644
--- a/Engine/prop_75in2f.xml
+++ b/Engine/prop_75in2f.xml
@@ -3,6 +3,8 @@
   IXX       1.67
   DIAMETER  75
   NUMBLADES  2
+  MINPITCH 25
+  MAXPITCH 25
   C_THRUST 18 1
 0.00	0.1170
 0.10	0.1170
diff --git a/Engine/prop_generic2f.xml b/Engine/prop_generic2f.xml
index c5770bc95..4226f8c0c 100644
--- a/Engine/prop_generic2f.xml
+++ b/Engine/prop_generic2f.xml
@@ -3,6 +3,8 @@
   IXX       1.67
   DIAMETER  76
   NUMBLADES  2
+  MINPITCH 20
+  MAXPITCH 20
   C_THRUST 12 1
   0.0   0.104
   0.1   0.103