From bb1443f96e476b6ddd2a0862a6ae224949eaf0d8 Mon Sep 17 00:00:00 2001
From: Torsten Dreyer <Torsten@t3r.de>
Date: Tue, 5 Nov 2013 22:23:35 +0100
Subject: [PATCH] c172p: magnetic compass tweaks

- add compass deviation table
- set compass "pitch" to compensate for wrong indication
---
 Aircraft/c172p/Systems/instrumentation.xml | 54 ++++++++++++++++++++++
 Aircraft/c172p/c172p-canvas-set.xml        |  3 ++
 Aircraft/c172p/c172p-set.xml               |  3 ++
 3 files changed, 60 insertions(+)

diff --git a/Aircraft/c172p/Systems/instrumentation.xml b/Aircraft/c172p/Systems/instrumentation.xml
index 855191047..b370e37b1 100644
--- a/Aircraft/c172p/Systems/instrumentation.xml
+++ b/Aircraft/c172p/Systems/instrumentation.xml
@@ -88,6 +88,60 @@ file, these values will be used (they are hardcoded).
   <magnetic-compass>
     <name>magnetic-compass</name>
     <number>0</number>
+    <!-- use either deviation property or deviation table for compass deviation -->
+    <!--deviation>/instrumentation/magnetic-compass/deviation-deg</deviation-->
+    <deviation>
+      <table>
+          <entry>
+            <ind>0</ind>
+            <dep>0</dep>
+          </entry>
+          <entry>
+            <ind>30</ind>
+            <dep>2</dep>
+          </entry>
+          <entry>
+            <ind>60</ind>
+            <dep>3</dep>
+          </entry>
+          <entry>
+            <ind>90</ind>
+            <dep>4</dep>
+          </entry>
+          <entry>
+            <ind>120</ind>
+            <dep>3</dep>
+          </entry>
+          <entry>
+            <ind>150</ind>
+            <dep>2</dep>
+          </entry>
+          <entry>
+            <ind>180</ind>
+            <dep>0</dep>
+          </entry>
+          <entry>
+            <ind>210</ind>
+            <dep>-2</dep>
+          </entry>
+          <entry>
+            <ind>240</ind>
+            <dep>-3</dep>
+          </entry>
+          <entry>
+            <ind>270</ind>
+            <dep>-4</dep>
+          </entry>
+          <entry>
+            <ind>300</ind>
+            <dep>-3</dep>
+          </entry>
+          <entry>
+            <ind>330</ind>
+            <dep>-2</dep>
+          </entry>
+      </table>
+    </deviation>
   </magnetic-compass>
 
   <nav-radio>
diff --git a/Aircraft/c172p/c172p-canvas-set.xml b/Aircraft/c172p/c172p-canvas-set.xml
index 143a26673..c3e17de74 100644
--- a/Aircraft/c172p/c172p-canvas-set.xml
+++ b/Aircraft/c172p/c172p-canvas-set.xml
@@ -213,6 +213,9 @@ Started October 23 2001 by John Check, fgpanels@rockfish.net
   <nav n="1">
     <volume type="double">0.7</volume>
   </nav>
+  <magnetic-compass>
+    <pitch-offset-deg type="double">-2.7</pitch-offset-deg>
+  </magnetic-compass>
  </instrumentation>
 
  <engines>
diff --git a/Aircraft/c172p/c172p-set.xml b/Aircraft/c172p/c172p-set.xml
index c4575c744..9494f76cb 100644
--- a/Aircraft/c172p/c172p-set.xml
+++ b/Aircraft/c172p/c172p-set.xml
@@ -233,6 +233,9 @@ Started October 23 2001 by John Check, fgpanels@rockfish.net
   <nav n="1">
     <volume type="double">0.7</volume>
   </nav>
+  <magnetic-compass>
+    <pitch-offset-deg type="double">-2.7</pitch-offset-deg>
+  </magnetic-compass>
  </instrumentation>
 
  <engines>