diff --git a/conf/airframes/twinstar1.xml b/conf/airframes/twinstar1.xml
index 2d8a63c822..320055f69b 100644
--- a/conf/airframes/twinstar1.xml
+++ b/conf/airframes/twinstar1.xml
@@ -69,7 +69,7 @@
   </section>
 	<section name="SIMU">
 		<define name="ROLL_RESPONSE_FACTOR" value="2."/>
-		<define name="YAW_RESPONSE_FACTOR" value="1.25"/>
+		<define name="YAW_RESPONSE_FACTOR" value="1.35"/>
 		<define name="WEIGHT" value="1.3"/>
 	</section>
 	<section name="FAILSAFE" prefix="FAILSAFE_">