From 3376a6f35d4c632a765a89569f5aebcc62276bdd Mon Sep 17 00:00:00 2001
From: PlayeRom <roman.ludwicki@playerom.com>
Date: Sun, 21 Aug 2022 21:35:15 +0200
Subject: [PATCH] Use towrope length for initial distance of AI plane

---
 nasal/flight-plan.nas | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/nasal/flight-plan.nas b/nasal/flight-plan.nas
index 01530b6..2ca0ae2 100644
--- a/nasal/flight-plan.nas
+++ b/nasal/flight-plan.nas
@@ -224,7 +224,7 @@ var FlightPlan = {
         var gliderOffsetM = me.getGliderOffsetFromRunwayThreshold(location);
 
         # ... and line up with the runway
-        me.addWptGround({"hdgChange": 0, "dist": 30 + gliderOffsetM}, {"altChange": 0, "ktas": 2.5});
+        me.addWptGround({"hdgChange": 0, "dist": me.getInitialDistance() + gliderOffsetM}, {"altChange": 0, "ktas": 2.5});
 
         # Rolling
         me.addWptGround({"hdgChange": 0, "dist": 10}, {"altChange": 0, "ktas": 5});
@@ -271,6 +271,17 @@ var FlightPlan = {
         return 1;
     },
 
+    #
+    # Get initial distance AI plane from the glider that the tow is nearly tautened.
+    #
+    # Return distance in meters.
+    #
+    getInitialDistance: func () {
+        var ropeLengthM = getprop("/sim/hitches/aerotow/tow/length") or 60;
+        var tautenRelative = 0.68;
+        return ropeLengthM * tautenRelative;
+    },
+
     #
     # Initialize AI aircraft variable
     #
@@ -307,7 +318,7 @@ var FlightPlan = {
             return rwyThreshold.distance_to(gliderCoord);
         }
 
-        # We are not on runway
+        # We are not on the runway
         return 0;
     },