I really have no idea why but the velocity should be 100 times larger than feet-per...

diff --git a/src/Model/acmodel.cxx b/src/Model/acmodel.cxx
index 187e27042e356768a256a11a79d9e9a72f6dd84f..4df8f19f1810cab0c4453d0e6e826b77f1542896 100644 (file)
--- a/src/Model/acmodel.cxx
+++ b/src/Model/acmodel.cxx
@@ -137,7 +137,7 @@ FGAircraftModel::update (double dt)
                          _speed_d->getFloatValue() );
   if ( vel[0] || vel[1] || vel[2] ) {
     SGQuatd hlOr = SGQuatd::fromLonLat(position);
-    _velocity = toVec3f( hlOr.backTransform( vel * SG_FEET_TO_METER ) );
+    _velocity = 100.0 * toVec3f( hlOr.rotateBack( vel * SG_FEET_TO_METER ) );
   }
   else
       _velocity = SGVec3f::zeros();