A partial engine failure occurred while within gliding distance of the operator's airstrip. Pilot turned toward the airstrip and shorlty afterwards lost all power from the engine. A landing without power was carried out, and on touchdown the right main l anding gear axle broke off causing the aircraft to nose over. Pilot was uninjured. Subsequent investigation did not identify any mechanical issues with the engine. The pilot believed that the power loss was caused by fuel starvation as a result of vapour lock in the fuel system. The aircraft type has had several suspected vapour lock induced power loss incidents, caused by vapour lock in fuel lines from the main tanks, particularly at low fuel levels and/or high ambient temperatures. The aircraft had about 45 minutes of fuel (15 minutes plus 30 minute reserve) remaining at the time of the incident. The main landing gear axle attachment design was also identified as a weak point, and newer aircraft have an improved design.