+// fgTie("/velocities/speed-north-fps", this,
+// &FGInterface::get_V_north,
+// &FGInterface::set_V_north);
+// fgSetArchivable("/velocities/speed-north-fps");
+// fgTie("/velocities/speed-east-fps", this,
+// &FGInterface::get_V_east,
+// &FGInterface::set_V_east);
+// fgSetArchivable("/velocities/speed-east-fps");
+// fgTie("/velocities/speed-down-fps", this,
+// &FGInterface::get_V_down,
+// &FGInterface::set_V_down);
+// fgSetArchivable("/velocities/speed-down-fps");
+ // FIXME: Temporarily read-only, until the
+ // incompatibilities between JSBSim and
+ // LaRCSim are fixed (LaRCSim adds the
+ // earth's rotation to the east velocity).