diff --git a/Systems/a320-adr.xml b/Systems/a320-adr.xml
index 5676bfbd..8e6b45b6 100644
--- a/Systems/a320-adr.xml
+++ b/Systems/a320-adr.xml
@@ -11,11 +11,11 @@
 				<product>
 					<property>aero/alpha-deg</property>
 					<table>
-						<independentVar lookup="row">/velocities/groundspeed-mps</independentVar>
+						<independentVar lookup="row">/velocities/groundspeed-kt</independentVar>
 						<tableData>
 							0  0.0
-							2  0.0
-							3  1.0
+							5  0.0
+							6  1.0
 						</tableData>
 					</table>
 				</product>
diff --git a/Systems/a320-iru.xml b/Systems/a320-iru.xml
new file mode 100644
index 00000000..0e54574d
--- /dev/null
+++ b/Systems/a320-iru.xml
@@ -0,0 +1,20 @@
+<!-- Airbus A320 IRU -->
+
+<!-- Copyright (c) 2019 Jonathan Redpath -->
+
+<system name="A320: IRU">
+
+    <channel name="IRU Accelerometers">
+		<accelerometer name="systems/navigation/acc-z">
+		
+		</accelerometer>
+			<orientation unit="DEG">
+    			<pitch> 0.0 </pitch>
+    			<roll>  0.0 </roll>
+    			<yaw> 	0.0 </yaw>
+  			</orientation>
+  			<axis>Z</axis>
+  			<lag>0.0</lag>
+	</channel>
+
+</system>
diff --git a/revision.txt b/revision.txt
index da2d3988..3f10ffe7 100644
--- a/revision.txt
+++ b/revision.txt
@@ -1 +1 @@
-14
\ No newline at end of file
+15
\ No newline at end of file