The pilot attempted to takeoff on an access track to a cattleyard. A southerly wind of about 15 knots necessitated take-off to the south, towards the yard. The aircraft was near gross weight and short-field technique was used. At a position 411 metres from the brakes-release point, the right brake caliper assembly struck a 1.65 metre high section of fence which formed the cattleyard. The right wing sheared off outboard of the fuel tank when it hit an adjacent 3 metre high fence cap. The aircraft then impacted the ground in a steep nose down attitude and slid inverted for a short distance before coming to rest. The aircraft had been airborne for 155 metres prior to the first impact. The pilot did not consult performance charts and underestimated the distance required for the aircraft to safely complete the take-off at this weight. There was sufficient room available for the pilot to taxi the aircraft at least a further 300 metres along the track to the north before attempting the take-off. A properly constructed, serviceable airstrip was located within 500 metres of the cattleyard.
