What happened
During the takeoff roll on runway 36, the pilot of a tailwheel equipped airplane encountered a left crosswind that fluctuated between a headwind and a tailwind. As these wind conditions shifted, the tail of the aircraft began to swing toward the right. This resulted in a ground loop to the left, causing the aircraft to run off the left edge of the runway.
As the aircraft exited the runway, the right main landing gear strut collapsed and the right wing made contact with the ground. The aircraft eventually came to rest partially elevated on its nose. The incident resulted in no injuries to the pilot.
Findings
The aircraft sustained damage to the propeller, the right wing, and the right landing gear attach point. Meteorological data from the Aviation Routine Weather Report (METAR) at Talkeetna at 1550 indicated winds were from 245 degrees at 10 knots.