The pilot reported he was departing from the ramp area at the airport due to wind direction. Shortly after becoming airborne in the tailwheel-equipped airplane, a gust of wind pushed the right wing down and the aircraft momentarily flew inverted, turned 90-degrees, and then impacted terrain. The airplane sustained substantial damage to the left and right wings and fuselage. The pilot reported that there were no preaccident mechanical anomalies with the airplane that would have precluded normal operation.