From 2260c44b216c92acde4e155a45c638ca6210c804 Mon Sep 17 00:00:00 2001
From: Bertrand Coconnier <bcoconni@users.sourceforge.net>
Date: Fri, 27 May 2016 13:50:35 +0200
Subject: [PATCH] Tentative to fix JSBSim bug SF #115 : don't compute
 cl-squared when qbar is too low otherwise its value will go through the roof
 and so will the induced drag.

---
 src/FDM/JSBSim/models/FGAerodynamics.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/FDM/JSBSim/models/FGAerodynamics.cpp b/src/FDM/JSBSim/models/FGAerodynamics.cpp
index 4aadccf61..6422a45cc 100644
--- a/src/FDM/JSBSim/models/FGAerodynamics.cpp
+++ b/src/FDM/JSBSim/models/FGAerodynamics.cpp
@@ -149,7 +149,7 @@ bool FGAerodynamics::Run(bool Holding)
 
   // Calculate lift coefficient squared
   // Make sure that aero/cl-squared is computed with the current qbar
-  if ( in.Qbar > 0) {
+  if ( in.Qbar > 1.0) {
     clsq = (vFw(eLift) + vFwAtCG(eLift))/ (in.Wingarea*in.Qbar);
     clsq *= clsq;
   }
-- 
2.39.5