The 3,500-hour private pilot departed Runway 36, (a 1,850-feet long by 75-feet wide grass/turf runway) and performed a sharp right turn to avoid the airspace of an airport located 4 miles to the south. During the turn, the pilot's new helmet and goggles were blown away from his face by the airstream. The biplane then stalled, spun to the right, and impacted terrain. The airplane came to rest on its nose, inverted, with the tail of the airplane leaning against a telephone pole. The pilot disconnected his harness and egressed the airplane as a post-impact fire ensued. The pilot was uninjured. In the recommendation section of the Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1/2), the pilot recommended that the accident could have been prevented had an adequate preflight been performed, and had he maintained an appropriate angle of attack to avoid the stall.