The pilot stated he taxied both ways on the grass airstrip so he could evaluate the condition of the "moist" grass and the winds prior to takeoff. He determined that a light, gusty crosswind existed and the slope of the terrain favored runway 24. The pilot performed a short/soft takeoff and the airplane lifted into ground effect at 45 mph. He stated he did not notice the engine rpms, but the airplane did seem to be accelerating. The pilot aborted the takeoff to avoid contacting trees at the end of the airstrip. He stated he held full back pressure on the control yoke and applied the brakes. The airplane subsequently nosed over resulting in substantial damage to the vertical stabilizer and rudder. A wind sock was present on the airstrip. Just prior to the accident, the closest weather reporting station, 22 miles away, reported winds from 070 degrees at 4 knots. The winds reported 53 minutes after the accident were from 030 degrees at 10 knots. The gross weight of the airplane at the time of the accident was about 3.5 pounds under the maximum gross weight. The pilot purchased the airplane about 3 weeks prior to the accident.