#include <simgear/compiler.h>
#include <simgear/structure/subsystem_mgr.hxx>
+#include <simgear/props/props.hxx>
#include <vector>
#include <string>
typedef std::vector< FGProtocol* > ProtocolVec;
ProtocolVec io_channels;
+
+ SGPropertyNode_ptr _realDeltaTime;
};