The pilot reported he had not flown the airplane for years, but once or twice a year, he would taxi the airplane up and down his private airstrip. He stated that on this occasion, he was taxied the airplane on the airstrip, and for some unknown reason, he decided to pull back on the yoke and allow the airplane to become airborne. The airplane did not have sufficient airspeed to stay airborne. The airplane stalled and impacted the terrain in a nose down attitude resulting in substantial damage to the fuselage. The pilot stated there were no mechanical failures or malfunctions of the airplane which would have precluded normal operation.