From 74a14a7dbc8ee12aa4300e5e32d30fd2403051d9 Mon Sep 17 00:00:00 2001
From: James Turner <zakalawe@mac.com>
Date: Thu, 14 Jun 2018 17:45:45 +0100
Subject: [PATCH] Merge 2018.2 fixes for the C172P

FDM: fix aileron trim preset, introduce spiral propwash tuning
setting propwash coefficient to 0.5
---
 Aircraft/c172p/c172p-set.xml | 7 ++++++-
 Aircraft/c172p/c172p.xml     | 1 +
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/Aircraft/c172p/c172p-set.xml b/Aircraft/c172p/c172p-set.xml
index 63a661e1c..8fc2a4b9d 100644
--- a/Aircraft/c172p/c172p-set.xml
+++ b/Aircraft/c172p/c172p-set.xml
@@ -514,7 +514,7 @@ http://forum.flightgear.org/viewtopic.php?f=4&t=25157
 
     <controls>
         <flight>
-            <aileron-trim type="double">0.044</aileron-trim>
+            <aileron-trim type="double">0.022</aileron-trim>
             <rudder-trim type="double">0.02</rudder-trim>
 
             <freeze-yoke type="bool">false</freeze-yoke>
@@ -1049,6 +1049,11 @@ http://forum.flightgear.org/viewtopic.php?f=4&t=25157
                 <damage type="bool">true</damage>
                 <damage-flag type="bool">false</damage-flag>
             </settings>
+            <aero>
+                <coefficient>
+                    <spiral-propwash-coeff type="double">0.5</spiral-propwash-coeff>
+                </coefficient>
+            </aero>
         </jsbsim>
     </fdm>
     <!-- End Damage Mod -->
diff --git a/Aircraft/c172p/c172p.xml b/Aircraft/c172p/c172p.xml
index 49f61d25e..a91370294 100644
--- a/Aircraft/c172p/c172p.xml
+++ b/Aircraft/c172p/c172p.xml
@@ -1654,6 +1654,7 @@
                     <property>metrics/Sw-sqft</property>
                     <property>metrics/bw-ft</property>
                     <value>-0.05</value>
+                    <property>aero/coefficient/spiral-propwash-coeff</property>
                 </product>
             </function>