From 858fb41824cd8887beaff3579e40c28e45bc13a0 Mon Sep 17 00:00:00 2001
From: Jonathan Redpath <legoboyvdlp@gmail.com>
Date: Sat, 8 Dec 2018 17:38:14 +0000
Subject: [PATCH] Add drag due to landing lights.

---
 Nasal/libraries.nas           | 12 ++++++++++++
 Systems/a320-aerodynamics.xml | 22 ++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/Nasal/libraries.nas b/Nasal/libraries.nas
index 1c821ad5..02ee028e 100644
--- a/Nasal/libraries.nas
+++ b/Nasal/libraries.nas
@@ -561,6 +561,18 @@ var lightsLoop = maketimer(0.2, func {
 			setprop("/controls/lighting/no-smoking-sign", 0); # sign stays on in cabin but sound still occurs
 		}
 	}
+	
+	if (getprop("controls/lighting/landing-lights[1]") >= 0.5) {
+		setprop("/fdm/jsbsim/rubbish/landL", 1);
+	} else {
+		setprop("/fdm/jsbsim/rubbish/landL", 0);
+	}
+	
+	if (getprop("controls/lighting/landing-lights[2]") >= 0.5) {
+		setprop("/fdm/jsbsim/rubbish/landR", 1);
+	} else {
+		setprop("/fdm/jsbsim/rubbish/landR", 0);
+	}
 });
 
 var lTray = func {
diff --git a/Systems/a320-aerodynamics.xml b/Systems/a320-aerodynamics.xml
index e5bec7ba..d801c4e7 100644
--- a/Systems/a320-aerodynamics.xml
+++ b/Systems/a320-aerodynamics.xml
@@ -10,6 +10,8 @@
 <aerodynamics>
 	
 	<property value="0.0">ice/wing</property>
+	<property value="0">rubbish/landL</property>
+	<property value="0">rubbish/landR</property>
 	
 	<axis name="LIFT">
 		
@@ -356,6 +358,26 @@
 				</table>
 			</product>
 		</function>
+		
+		<function name="aero/force/Drag_landing_light_left">
+			<description>Drag due to left landing light</description>
+			<product>
+				<property>aero/qbar-psf</property>
+				<property>metrics/Sw-sqft</property>
+				<property>rubbish/landL</property>
+				<value>0.025</value>
+			</product>
+		</function>
+		
+		<function name="aero/force/Drag_landing_light_right">
+			<description>Drag due to right landing light</description>
+			<product>
+				<property>aero/qbar-psf</property>
+				<property>metrics/Sw-sqft</property>
+				<property>rubbish/landR</property>
+				<value>0.025</value>
+			</product>
+		</function>
 	
 	</axis>