From e9d9a4787233f5323f4fb0c48f8eaf5fafc8ac44 Mon Sep 17 00:00:00 2001
From: Joshua Davidson <joshuadavidson2000@gmail.com>
Date: Wed, 13 Feb 2019 21:08:14 -0500
Subject: [PATCH] DU: SlipSkid indicator behavior fixed

---
 Models/Instruments/PFD/PFD.nas |  4 ++--
 Systems/pfd.xml                | 20 ++++++++++++++++++++
 revision.txt                   |  2 +-
 3 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/Models/Instruments/PFD/PFD.nas b/Models/Instruments/PFD/PFD.nas
index f9c39a96..98c2bacb 100644
--- a/Models/Instruments/PFD/PFD.nas
+++ b/Models/Instruments/PFD/PFD.nas
@@ -88,7 +88,7 @@ var at_input_spd_kts = props.globals.getNode("/it-autoflight/input/spd-kts", 1);
 var fd_roll = props.globals.getNode("/it-autoflight/fd/roll-bar", 1);
 var fd_pitch = props.globals.getNode("/it-autoflight/fd/pitch-bar", 1);
 var decision = props.globals.getNode("/instrumentation/mk-viii/inputs/arinc429/decision-height", 1);
-var skid_slip = props.globals.getNode("/instrumentation/slip-skid-ball/indicated-slip-skid", 1);
+var slip_skid = props.globals.getNode("/instrumentation/pfd/slip-skid", 1);
 var FMGCphase = props.globals.getNode("/FMGC/status/phase", 1);
 var loc = props.globals.getNode("/instrumentation/nav[0]/heading-needle-deflection-norm", 1);
 var gs = props.globals.getNode("/instrumentation/nav[0]/gs-needle-deflection-norm", 1);
@@ -732,7 +732,7 @@ var canvas_PFD_base = {
 		me.AI_horizon_ground_rot.setRotation(-roll_cur * D2R, me["AI_center"].getCenter());
 		me.AI_horizon_sky_rot.setRotation(-roll_cur * D2R, me["AI_center"].getCenter());
 		
-		me["AI_slipskid"].setTranslation(math.clamp(skid_slip.getValue(), -7, 7) * -15, 0);
+		me["AI_slipskid"].setTranslation(math.clamp(slip_skid.getValue(), -15, 15) * 7, 0);
 		me["AI_bank"].setRotation(-roll_cur * D2R);
 		
 		if (fbw_law.getValue() == 0) {
diff --git a/Systems/pfd.xml b/Systems/pfd.xml
index 6d57329d..6e7bf074 100644
--- a/Systems/pfd.xml
+++ b/Systems/pfd.xml
@@ -337,5 +337,25 @@
 		</input>
 		<output>/instrumentation/pfd/vs-digit-trans</output>
 	</filter>
+	
+	<filter>
+		<name>Speed Predictor Exponential</name>
+		<debug>false</debug>
+		<type>exponential</type>
+		<input>
+			<condition>
+				<property>/fdm/jsbsim/position/wow</property>
+			</condition>
+			<expression>
+				<product>
+					<property>/fdm/jsbsim/accelerations/Ny</property>
+					<value>-25</value>
+				</product>
+			</expression>
+		</input>
+		<input>/fdm/jsbsim/aero/beta-deg</input>
+		<output>/instrumentation/pfd/slip-skid</output>
+		<filter-time>0.16</filter-time>
+	</filter>
 
 </PropertyList>
diff --git a/revision.txt b/revision.txt
index fad0b619..ba238e12 100644
--- a/revision.txt
+++ b/revision.txt
@@ -1 +1 @@
-4761
\ No newline at end of file
+4762
\ No newline at end of file