From: Bertrand Coconnier <bcoconni@users.sourceforge.net>
Date: Fri, 27 May 2016 11:50:35 +0000 (+0200)
Subject: Tentative to fix JSBSim bug SF #115 : don't compute cl-squared when qbar is too low... 
X-Git-Url: https://git.mxchange.org/?a=commitdiff_plain;h=2260c44b216c92acde4e155a45c638ca6210c804;p=flightgear.git

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.
---

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;
   }