What happened
The pilot was performing a landing on a hard-surfaced runway under calm or nearly calm wind conditions. During the landing roll, the pilot intentionally performed a main gear wheel landing, keeping the tailwheel off the runway for a portion of the rollout. As the pilot lowered the tailwheel onto the runway, the aircraft swerved to the left and entered a ground loop.
During this maneuver, the right main landing gear collapsed and the right wing struck the runway surface. The incident resulted in no injuries to the pilot. The aircraft sustained substantial damage to the right wing and the right main landing gear gearbox.
Findings
The pilot reported that there were no mechanical problems with the aircraft prior to the impact. The loss of control was attributed to the aircraft traveling at an excessive speed at the moment the pilot elected to lower the tailwheel onto the runway.