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The pilots were competing in the Austraglide '86 international gliding championships. During a cross-country exercise a number of gliders were thermalling in the same general area. The pilot of D-2870 entered a thermal at about 4000 feet above ground level. His entry was made via a 45 degree bank right turn, but after turning through about 450 degrees the left wingtip of his aircraft contacted the forward under-fuselage area of VH-HNZ. This aircraft had been in a left turn with about 12 degrees angle of bank. Following the collision, both aircraft remained under control and were flown to the planned destination without further incident. Neither pilot saw the other aircraft prior to the collision. The pilot of VH-HNZ had been turning to adjust his track and had been watching other gliders well below his level. Visibility forward and downward is somewhat restricted in this particular model of glider. The pilot of D-2870 advised that he was turning towards the sun and climbing when the collision occurred.

Download Final Report
[ Download PDF: 22KB]
General details
Date: 27 January 1986 Investigation status: Completed 
Time: N/K  
Location:48 km NE Benalla Investigation type: Occurrence Investigation 
State: Victoria Occurrence type: Airborne collision 
Release date: 10 June 1986 Occurrence class: Airspace 
Report status: Final Occurrence category: Accident 
 Highest injury level: None 
Aircraft 1 details
Aircraft manufacturer: Glaser-Dirks 
Aircraft model: DG-300 
Aircraft registration: D-2870 
Type of operation: Gliding 
Damage to aircraft: Substantial 
Departure point:Benalla VIC
Departure time:N/K
Destination:Benalla VIC
Aircraft 2 details
Aircraft manufacturer: Schempp-Hirth Flugzeugbau GmbH 
Aircraft model: Discus 
Aircraft registration: VH-HNZ 
Type of operation: Gliding 
Damage to aircraft: Minor 
Departure point:Benalla VIC
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