diff --git a/Aircraft/Generic/generic-instrumentation.xml b/Aircraft/Generic/generic-instrumentation.xml
index d5c2ed3..2025724 100644
--- a/Aircraft/Generic/generic-instrumentation.xml
+++ b/Aircraft/Generic/generic-instrumentation.xml
@@ -41,6 +41,15 @@ file, these values will be used (they are hardcoded).
     <name>altimeter</name>
     <number>0</number>
     <static-pressure>/systems/static/pressure-inhg</static-pressure>
+    <tau>0</tau>
+  </altimeter>
+
+  <altimeter>
+    <name>encoder</name>
+    <number>0</number>
+    <static-pressure>/systems/static/pressure-inhg</static-pressure>
+    <quantum>10</quantum>
+    <tau>0</tau>
   </altimeter>
 
   <attitude-indicator>
@@ -59,11 +68,11 @@ file, these values will be used (they are hardcoded).
     <number>0</number>
   </dme>
 
-  <encoder>
+  <!-- encoder>
     <name>encoder</name>
     <number>0</number>
     <static-pressure>/systems/static/pressure-inhg</static-pressure>
-  </encoder>
+  </encoder -->
 
   <marker-beacon>
     <name>marker-beacon</name>


diff --git a/Aircraft/Generic/generic-systems.xml b/Aircraft/Generic/generic-systems.xml
index 9473bfd..f89da5b 100644
--- a/Aircraft/Generic/generic-systems.xml
+++ b/Aircraft/Generic/generic-systems.xml
@@ -16,6 +16,7 @@
   <static>
     <name>static</name>
     <number>0</number>
+    <tau>.1</tau>
   </static>
 
   <vacuum>