The pilot said that during the takeoff roll he allowed the airplane to drift to the left of the centerline of the runway 18, and the left wing tip contacted a bale of hay. He said that the impact with the bale caused the airplane to veer about 90 degrees to the left and exit the runway, and after exiting the runway, the airplane impacted another bale of hay, which spun it further to the left incurring damage. According to the pilot, prior to the accident there had been no mechanical failure or malfunction to the airplane or to any of its systems.