diff --git a/Aircraft/c172p/c172p-set.xml b/Aircraft/c172p/c172p-set.xml
index 9494f76cb..a5169f79f 100644
--- a/Aircraft/c172p/c172p-set.xml
+++ b/Aircraft/c172p/c172p-set.xml
@@ -286,30 +286,35 @@ Started October 23 2001 by John Check, fgpanels@rockfish.net
   <weight>
    <name type="string">Pilot</name>
    <weight-lb alias="/fdm/jsbsim/inertia/pointmass-weight-lbs[0]"/>
+   <arm-in alias="/fdm/jsbsim/inertia/pointmass-location-X-inches[0]"/>
    <min-lb type="double">0.0</min-lb>
    <max-lb type="double">300.0</max-lb>
   </weight>
   <weight>
    <name type="string">Co-Pilot</name>
    <weight-lb alias="/fdm/jsbsim/inertia/pointmass-weight-lbs[1]"/>
+   <arm-in alias="/fdm/jsbsim/inertia/pointmass-location-X-inches[0]"/>
    <min-lb type="double">0.0</min-lb>
    <max-lb type="double">300.0</max-lb>
   </weight>
   <weight>
    <name type="string">Left Passenger</name>
    <weight-lb alias="/fdm/jsbsim/inertia/pointmass-weight-lbs[2]"/>
+   <arm-in alias="/fdm/jsbsim/inertia/pointmass-location-X-inches[0]"/>
    <min-lb type="double">0.0</min-lb>
    <max-lb type="double">300.0</max-lb>
   </weight>
   <weight>
    <name type="string">Right Passenger</name>
    <weight-lb alias="/fdm/jsbsim/inertia/pointmass-weight-lbs[3]"/>
+   <arm-in alias="/fdm/jsbsim/inertia/pointmass-location-X-inches[0]"/>
    <min-lb type="double">0.0</min-lb>
    <max-lb type="double">300.0</max-lb>
   </weight>
   <weight>
    <name type="string">Baggage</name>
    <weight-lb alias="/fdm/jsbsim/inertia/pointmass-weight-lbs[4]"/>
+   <arm-in alias="/fdm/jsbsim/inertia/pointmass-location-X-inches[0]"/>
    <min-lb type="double">0.0</min-lb>
    <max-lb type="double">150.0</max-lb> <!-- WARNING: Max baggage "by the book" is 120lbs or less! -->
   </weight>
@@ -320,6 +325,31 @@ Started October 23 2001 by John Check, fgpanels@rockfish.net
    <maximum-ramp-mass-lbs>2407</maximum-ramp-mass-lbs>
    <maximum-takeoff-mass-lbs>2400</maximum-takeoff-mass-lbs>
    <maximum-landing-mass-lbs>2400</maximum-landing-mass-lbs>
+   <cg>
+    <dimension type="string">in</dimension>
+    <limit>
+     <entry>
+      <position type="double">35.0</position>
+      <mass-lbs type="double">1450</mass-lbs>
+     </entry>
+     <entry>
+      <position type="double">35.0</position>
+      <mass-lbs type="double">1950</mass-lbs>
+     </entry>
+     <entry>
+      <position type="double">41</position>
+      <mass-lbs type="double">2550</mass-lbs>
+     </entry>
+     <entry>
+      <position type="double">47.2</position>
+      <mass-lbs type="double">2550</mass-lbs>
+     </entry>
+     <entry>
+      <position type="double">47.2</position>
+      <mass-lbs type="double">1450</mass-lbs>
+     </entry>
+    </limit>
+   </cg>
   </mass-and-balance>
  </limits>