The AirMule is a compact, unmanned, single-engine, VTOL (Vertical Take Off and Landing) aircraft. Internal lift rotors enable the AirMule to fly inside obstructed (e.g. mountainous, wooded, urban) terrain where helicopters are unable to operate. The AirMule is innovative due to its internal rotors and significant payload capacity that allows for the evacuation of 2 casualties as well as fast and flexible payload reconfiguration for other missions. It is also ideally suited to special robotic operation, for example via Tele-Presence.