Correct temperature value passed to FDM.

diff --git a/src/Environment/environment_mgr.cxx b/src/Environment/environment_mgr.cxx
index f9368e5bafd2b9756f745ff90ea9e09f0bbf4d70..3821ff7ae7da95e722d23fda5561370e9cf5dc4e 100644 (file)
--- a/src/Environment/environment_mgr.cxx
+++ b/src/Environment/environment_mgr.cxx
@@ -206,7 +206,7 @@ FGEnvironmentMgr::_update_fdm () const
                                // convert from Rankine to Celsius
     cur_fdm_state
       ->set_Static_temperature((9.0/5.0)
-                              * _environment->get_temperature_degc() + 492.0);
+                              * (_environment->get_temperature_degc() + 273.15));
                                // convert from inHG to PSF
     cur_fdm_state
       ->set_Static_pressure(_environment->get_pressure_inhg() * 70.726566);