From 12b2022503fa2c4165752d575c014859e1aeb38c Mon Sep 17 00:00:00 2001
From: Henning Stahlke <github@henningstahlke.de>
Date: Sun, 4 Mar 2018 22:18:45 +0100
Subject: [PATCH] YASim add error message, solver shall not quit silently.

---
 src/FDM/YASim/Airplane.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/FDM/YASim/Airplane.cpp b/src/FDM/YASim/Airplane.cpp
index 51a92b56c..231a4f401 100644
--- a/src/FDM/YASim/Airplane.cpp
+++ b/src/FDM/YASim/Airplane.cpp
@@ -964,8 +964,14 @@ void Airplane::solveAirplane(bool verbose)
         float liftFactor = awgt / (awgt+alift);
 
         // Sanity:
-        if(dragFactor <= 0 || liftFactor <= 0)
+        if(dragFactor <= 0) {
+            _failureMsg = "dragFactor < 0 (drag > thrust)";
             break;
+        }
+        if(liftFactor <= 0) {
+            _failureMsg = "liftFactor < 0";
+            break;
+        }
 
         // And the elevator control in the approach.  This works just
         // like the tail incidence computation (it's solving for the