The pilot reported that during takeoff in gusty crosswind conditions, the wind changed from a left crosswind to a left quartering tail wind. The tail of the airplane was pushed to the right; the nose turned to the left. He further reported that the left wing lifted, which caused the airplane to wheelbarrow off the runway to the left/right and impact an airport sign. Following the impact, the right fuel tank ruptured, the wing caught fire, and the airplane came to a stop. The right wing sustained substantial damage.

The pilot reported that there were no preimpact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.