+// Use a bigger number to be more responsive, or a smaller number
+// to be more sluggish.
+#define RESPONSIVENESS 0.5
+
+
+TurnIndicator::TurnIndicator ( SGPropertyNode *node) :
+ _last_rate(0),
+ _name(node->getStringValue("name", "turn-indicator")),
+ _num(node->getIntValue("number", 0))