diff --git a/aman/sys/aco/Node.py b/aman/sys/aco/Node.py
index e8fc7ca..bd427e2 100644
--- a/aman/sys/aco/Node.py
+++ b/aman/sys/aco/Node.py
@@ -179,8 +179,8 @@ class Node:
 
                 # calculate average speed gain
                 avgSpeed = trackmiles / (flightTime.total_seconds() / 3600.0)
-                avgSpeedIncrease = avgSpeed * 1.10
                 avgSpeedDecrease = avgSpeed * 0.80
+                avgSpeedIncrease = avgSpeed * 1.05
                 decreasedSpeedFlighttime = (trackmiles / avgSpeedDecrease) * 3600.0 # given in seconds
 
                 # calculate shortcut gain and add 15 miles for final and base turn