FlightGear AirCrane from Helijah's hanger This project is a collaborative effort with Helijah's hanger (http://helijah.free.fr/flightgear/hangar.htm) to upgrade and add new features to this outstanding aircraft. What is considered to be the stable version will be found in the fgaddon repository at https://sourceforge.net/p/flightgear/fgaddon/HEAD/tree/trunk/Aircraft/AirCrane/