diff --git a/Aircraft/c172p/Engines/eng_io320.xml b/Aircraft/c172p/Engines/eng_io320.xml
index 2e036a35f..a172d836a 100644
--- a/Aircraft/c172p/Engines/eng_io320.xml
+++ b/Aircraft/c172p/Engines/eng_io320.xml
@@ -12,12 +12,15 @@
 -->
 
 <piston_engine name="IO320">
-  <minmp unit="INHG">          6.5 </minmp>
-  <maxmp unit="INHG">         29.92 </maxmp>
+  <minmp unit="INHG">          6.5 </minmp>	<!-- Deprecated -->
+  <maxmp unit="INHG">         29.92 </maxmp>	<!-- Deprecated -->
   <displacement unit="IN3"> 320.00 </displacement>
-  <maxhp>        160.00 </maxhp>
-  <cycles>         2.0 </cycles>
+  <bsfc>           0.45 </bsfc>
+  <maxhp>        160.00 </maxhp>		<!-- Deprecated -->
+  <cycles>         4.0 </cycles>
   <idlerpm>      550.0 </idlerpm>
+  <maxrpm>      2700.0 </maxrpm>
   <maxthrottle>    1.0 </maxthrottle>
   <minthrottle>    0.2 </minthrottle>
+  <sparkfaildrop>  0.0 </sparkfaildrop>
 </piston_engine>
diff --git a/Aircraft/c172p/c172p.xml b/Aircraft/c172p/c172p.xml
index a22b37e5d..c02bf7e57 100644
--- a/Aircraft/c172p/c172p.xml
+++ b/Aircraft/c172p/c172p.xml
@@ -361,14 +361,14 @@
     </flight_control>
     <aerodynamics>
 
-        <alphalimits>
-            <min unit="RAD">-0.087</min>
-            <max unit="RAD">0.28</max>
+        <alphalimits unit="RAD">
+            <min>-0.087</min>
+            <max>0.28</max>
         </alphalimits>
 
-        <hysteresis_limits>
-            <min unit="RAD">0.09</min>
-            <max unit="RAD">0.36</max>
+        <hysteresis_limits unit="RAD">
+            <min>0.09</min>
+            <max>0.36</max>
         </hysteresis_limits>
 
         <function name="aero/function/kCDge">
@@ -862,4 +862,28 @@
             </function>
         </axis>
     </aerodynamics>
+<!--
+    <output name="JSBout172C.csv" type="CSV" rate="60">
+      <property> aero/qbar-psf </property>
+      <property> accelerations/udot-ft_sec2 </property>
+      <property> accelerations/vdot-ft_sec2 </property>
+      <property> accelerations/wdot-ft_sec2 </property>
+      <property> accelerations/a-pilot-x-ft_sec2 </property>
+      <property> accelerations/a-pilot-y-ft_sec2 </property>
+      <property> accelerations/a-pilot-z-ft_sec2 </property>
+      <property> accelerations/n-pilot-x-norm    </property>
+      <property> accelerations/n-pilot-y-norm    </property>
+      <property> accelerations/n-pilot-z-norm    </property>
+      <rates> ON </rates>
+      <velocities> ON </velocities>
+      <forces> ON </forces>
+      <moments> ON </moments>
+      <position> ON </position>
+      <fcs> OFF </fcs>
+      <propulsion> OFF </propulsion>
+      <aerosurfaces> OFF </aerosurfaces>
+      <fcs> OFF </fcs>
+      <ground_reactions> OFF </ground_reactions>
+    </output>
+-->
 </fdm_config>