diff --git a/Systems/a320-aerodynamics.xml b/Systems/a320-aerodynamics.xml
index 126a7601..36ae4f45 100644
--- a/Systems/a320-aerodynamics.xml
+++ b/Systems/a320-aerodynamics.xml
@@ -592,18 +592,6 @@
 			</product>
 		</function>
 		
-		<function name="aero/moment/Yaw_roll_rate">
-			<description>Yaw moment due to roll rate</description>
-			<product>
-				<property>aero/qbar-psf</property>
-				<property>metrics/Sw-sqft</property>
-				<property>metrics/bw-ft</property>
-				<property>aero/bi2vel</property>
-				<property>velocities/r-aero-rad_sec</property>
-				<value>-0.2</value>
-			</product>
-		</function>
-		
 		<function name="aero/moment/Yaw_damp">
 			<description>Yaw moment due to yaw rate</description>
 			<product>
@@ -612,7 +600,7 @@
 				<property>metrics/bw-ft</property>
 				<property>aero/bi2vel</property>
 				<property>velocities/r-aero-rad_sec</property>
-				<value>-0.1</value>
+				<value>-0.3</value>
 			</product>
 		</function>
 		
diff --git a/revision.txt b/revision.txt
index 556d2861..1bbd686c 100644
--- a/revision.txt
+++ b/revision.txt
@@ -1 +1 @@
-4621
\ No newline at end of file
+4622
\ No newline at end of file